DOH Dental Specialist oral exam prep

Knowledge: A persistent ulcer of more than three weeks on the lateral or ventral tongue in a smoker and drinker with a firm node is oral squamous cell carcinoma until proven otherwise. The lateral tongue is the commonest oral site. Important differentials are a traumatic ulcer, aphthous ulcer, a deep fungal or tuberculous ulcer, syphilis and lymphoma, but none of them removes the need for biopsy. Clinical staging uses tumour size and depth of invasion, node status and metastasis, with the 8th edition AJCC adding depth of invasion. A non-healing ulcer that has not responded to steroid after 2 to 3 weeks should not be treated further empirically. Potentially malignant disorders such as leukoplakia may be seen nearby and I would examine the whole mouth.

Management: I would take a full history and examine the head and neck, noting the site, size, induration, fixation and nodes in all levels. I would arrange an incisional biopsy from the edge including adjacent normal tissue, ideally at the first visit or through the urgent route. I would refer at once to the head and neck cancer multidisciplinary team, with imaging requested by them, such as MRI or CT and ultrasound of the neck. I would not wait for a laboratory result to refer, and I would not start treatment myself. I would also address tobacco and alcohol cessation, dental assessment before radiotherapy, nutrition and swallowing, and arrange a clear follow-up so that he is not lost.

Ethics and communication: I would tell him honestly that this ulcer may be cancer, that a biopsy is needed to know, and that speed matters, in simple language and with an interpreter if needed, and with a family member present if he agrees. I would record the discussion and obtain consent for the biopsy under Cabinet Resolution No. 40 of 2019. Delay in referral may expose me to liability under the Medical Liability Decree-Law, Federal Decree-Law No. 4 of 2016, so I would document the date of referral and follow up that the appointment took place. I would respect his autonomy if he declines but would explain the risk clearly.

Reference: WHO Classification of Head and Neck Tumours (5th ed, 2022); Scully C, Oral and Maxillofacial Medicine: The Basis of Diagnosis and Treatment (3rd ed, 2013)

Knowledge: The bilateral reticular striae with erosive areas are characteristic of oral lichen planus, a T-cell-mediated chronic disease. Biopsy is still advised for erosive or atypical areas to confirm the diagnosis and to exclude dysplasia, because lichen planus is a potentially malignant disorder with a transformation rate usually estimated at around 1 percent over many years. Lichenoid reactions to drugs, amalgam, cinnamon flavourings or graft-versus-host disease are in the differential, as are leukoplakia, pemphigoid, pemphigus and lupus. A tongue lesion that is eroded, unilateral and persistent should be biopsied from the most suspicious site. Hepatitis C is associated with lichen planus in some populations, so testing is considered.

Management: I would take a medication, dental and allergy history, and ask about skin, genital, scalp and nail lesions. I would biopsy the lateral tongue lesion, and a second site from a striae area if needed, with direct immunofluorescence if a vesiculobullous disease is possible. I would exclude local factors by smoothing sharp edges, treating plaque and review of the restoration for lichenoid contact reaction, with patch testing if suspected. First-line treatment is a high-potency topical corticosteroid such as clobetasol or betamethasone in an adhesive base or mouthwash, and I would check for candidal overgrowth and treat it. Review would be every 6 to 12 months, and sooner if any lesion changes, with advice on smoking and alcohol. Refractory disease may need systemic treatment through a specialist.

Ethics and communication: I would explain that the condition is chronic and not infectious, usually controlled but not cured, and that the small cancer risk is why we monitor. I would not exaggerate or hide this risk. Consent for the biopsy and the discussion would be documented under Cabinet Resolution No. 40 of 2019. If I request hepatitis C testing, I would explain why and keep the result confidential under the law on health information, Federal Law No. 2 of 2019. I would also discuss when to seek urgent review, such as a non-healing ulcer or a lump.

Reference: Gonzalez-Moles MA et al, Malignant transformation risk of oral lichen planus: a systematic review and comprehensive meta-analysis (Oral Oncol 2021); Scully C, Oral and Maxillofacial Medicine: The Basis of Diagnosis and Treatment (3rd ed, 2013); Warnakulasuriya S et al, Oral potentially malignant disorders consensus (Oral Dis 2021)

Knowledge: The three principles are justification, optimisation (ALARA) and dose limitation, and for a pregnant patient the question is whether the image will change management. A dental periapical radiograph delivers a very small effective dose, in the order of a few microsieverts, and the dose to the fetus is far below the thresholds of about 50 to 100 mGy where deterministic effects occur, so the risk is negligible. Delaying diagnosis of an infection carries real risk to the mother and fetus. Good technique cuts dose: a rectangular collimator, a fast digital sensor or image receptor, a paralleling technique and a lead apron are optional extras and not the main protection. Retakes are avoided with a holder and correct positioning.

Management: I would confirm that clinical examination suggests a need for an image, for example to see periapical pathology, caries depth or a fracture, and that no recent radiograph exists. If justified, I would take a single periapical film of the lower molar with a rectangular collimator and a digital sensor, with a thyroid collar and a protective apron according to local practice, and record the justification and reported findings. I would avoid CBCT or panoramic imaging unless needed, and I would delay elective imaging until after delivery. The treatment, for instance drainage, root canal treatment or extraction with local anaesthesia, is best done in the second trimester but urgent infection is treated at any time. I would write a clear report.

Ethics and communication: I would explain in plain language that the dose is tiny, compare it with natural background radiation of a few days, and that the benefit of treating an infection outweighs the risk. I would obtain her informed consent, as under Cabinet Resolution No. 40 of 2019, and document the discussion, justification and dose. If she declines, I would respect her choice, offer clinical management and explain the risks of not imaging. I would also check that the practice's radiation protection arrangements follow the licensing authority's requirements and the radiation protection supervisor's advice.

Reference: FGDP Selection Criteria for Dental Radiography (3rd ed); ICRP Publication 103 (2007); Whaites E, Drage N, Essentials of Dental Radiography and Radiology (6th ed)

Knowledge: A vertical, nodular or linear calcification at the level of C3 to C4, posterior and inferior to the hyoid bone and the angle of the mandible, is typical of calcified carotid artery atheroma. Differentials include a calcified triticeous cartilage, stylohyoid ligament, calcified lymph node, phlebolith and tonsillolith, which have different sites and shapes. Atheroma suggests carotid stenosis and increased stroke and cardiovascular risk, particularly with her age and her diabetes. Panoramic imaging has limited sensitivity and specificity for carotid disease, so it is a screening clue and not a diagnosis. Duplex ultrasound is the usual next test, ordered by her physician.

Management: I would report the whole image in a systematic way, not just the planned implant sites, and include this finding with a description of its position, size and shape in my report. I would recommend that the patient be referred to her physician for assessment of cardiovascular risk, including carotid duplex ultrasound, and I would send the dentist a clear letter with a copy of the image. I would ask the dentist to inform her in person, and check whether she has had symptoms such as transient visual loss, weakness or speech disturbance, where urgent action is needed the same day. The implant plan continues only after the medical risk is clarified.

Ethics and communication: As a radiologist I am responsible for reporting everything within the image that I can see, and I should not ignore an incidental finding. I would avoid giving a firm diagnosis of stenosis, and I would be honest about the limits of the image. The finding should be communicated to the referrer and recorded, with the patient informed in a way that does not cause alarm, and her records protected under Federal Law No. 2 of 2019 on health data. If she refuses to see her physician, the dentist should document that she was advised.

Reference: White SC, Pharoah MJ, Oral Radiology: Principles and Interpretation (7th ed); Friedlander AH, Maeder LA, The prevalence of calcified carotid artery atheromas on the panoramic radiographs of patients with type 2 diabetes mellitus (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000)

Knowledge: INTERPOL's DVI guide recognises fingerprints, DNA and forensic odontology as primary identifiers, while visual recognition, jewellery and clothing are secondary. DVI has four phases: scene, post-mortem data collection, ante-mortem data collection and reconciliation. Dental evidence is valuable because teeth and restorations resist fire and decomposition. Comparison uses unique features such as restorations, root fillings, missing teeth, crown shape, bone patterns and prostheses. The result is expressed in terms such as established, probable, possible or excluded, and an identification needs enough concordant unique features and no unexplained discrepancy.

Management: I would set up the post-mortem odontology station with a team lead, an examiner, a recorder and a photographer, with a standard form such as the INTERPOL Yellow form, and chart the dentition, take radiographs and photographs, and record each fragment with a unique number. I would also set up an ante-mortem section to obtain dental charts, radiographs and treatment records, checking dates and the identity of the source, as records may be old or inaccurate. A separate odontologist from the one who made the post-mortem charts does the comparison, to reduce bias, and a reconciliation board reviews it. Burnt jaws are handled carefully, and DNA sampling of teeth is coordinated with the DNA team so the material is not lost.

Ethics and communication: The families are in distress, and communication goes through the incident command and family liaison, not through the odontologists directly. I would not name a victim until all agreed procedures are complete, and an identification is made only when criteria are met, not under pressure. I would document each step so that the process can be reviewed in court. Dental records are confidential health data protected under Federal Law No. 2 of 2019, and are used only for the identification according to the authority's instruction. I would also care for the welfare of team members.

Reference: INTERPOL Disaster Victim Identification Guide (current edition); Forensic Odontology: An Essential Guide (Adams C, Carabott R, Evans S, 2014)

Knowledge: Dental age estimation uses tooth development, which is less affected by nutrition and disease than skeletal age, but third molar development is highly variable between individuals and populations. A method such as Demirjian's eight-stage system scores formation, and stage H (root apex closed) in the lower third molar is associated with an age over 18 in most studies, whereas an open apex in the third molar is common between 16 and 20 years. Here the second molars are complete and the third molars are developing, which fits an age of roughly late teens but cannot show whether he is above or below 18. A single estimated age is not possible. I should give an estimate with an error range and a probability based on a reference population, and say that population differences exist.

Management: I would confirm the identity of the request, and the purpose and legal basis, and check that the radiograph was taken for a justified reason, and that imaging for age estimation alone should follow the authority's rules and the patient's consent. I would examine the image quality and stage the teeth independently with a second examiner, and apply a published reference data set for the most similar population. I would write a report stating the method used, the stages found, the mean estimated age and the range, and say clearly that the findings are consistent with an age of about 16 to 20 years and do not exclude either side of 18. I would recommend that other evidence, such as the hand and wrist and a medical review, may be used by the authority.

Ethics and communication: Radiation exposure for a purely administrative purpose needs a legal basis and the person's informed consent or that of a legal representative as per Cabinet Resolution No. 40 of 2019, and the principle of justification applies. I would not give a certainty that science cannot support, because a wrong opinion could harm a minor who is entitled to child protection under Federal Law No. 3 of 2016 on Child Rights. When uncertain, the benefit of the doubt favours treating the person as a child. I would document my method and keep the data confidential.

Reference: Schmeling A et al, Criteria for age estimation in living individuals (Int J Legal Med 2008); Study Group on Forensic Age Diagnostics (AGFAD) recommendations; Demirjian A, Goldstein H, Tanner JM (Hum Biol 1973)

Knowledge: Trismus, fever, facial swelling and difficulty swallowing suggest an odontogenic infection spreading into the deep fascial spaces, such as the masticatory, submandibular, sublingual or parapharyngeal spaces. Ludwig's angina, with bilateral submandibular and sublingual swelling and a raised tongue, can threaten the airway. Red flags are trismus, dysphagia, floor of mouth elevation, drooling, stridor, voice change, a high fever and signs of sepsis such as tachycardia and hypotension. The principle is source control: removing or draining the cause, with antibiotics as an adjunct. Uncontrolled diabetes and immunosuppression increase the risk, so I would ask about them.

Management: I would assess the airway first, observe his breathing, voice and swallowing, and check vital signs. With trismus below 20 mm, systemic upset and swallowing difficulty, I would arrange immediate referral to the hospital oral and maxillofacial unit by ambulance, with a phone call and a clear handover, and not treat him in the practice. While waiting, I would give oxygen if needed and keep him sitting up. Hospital care includes IV antibiotics such as a penicillin with metronidazole, imaging if the airway or deep space is involved, drainage and extraction of the offending tooth, with fluids and blood tests. If he had been stable with a localised swelling and good mouth opening, I would drain, remove the cause and give a short course of antibiotics, with review in 24 to 48 hours.

Ethics and communication: I would tell him clearly why this is dangerous and why the hospital is needed today, and record the findings, the time of referral and the advice. If he declines, I would explain the risk to life, check that he has capacity, and document this, in line with the consent principles of Cabinet Resolution No. 40 of 2019. I know the limits of my scope and facilities, and I would not attempt an extraction in a practice with a threatened airway. Delay or inadequate action could lead to liability under Federal Decree-Law No. 4 of 2016.

Reference: Scottish Dental Clinical Effectiveness Programme, Drug Prescribing for Dentistry (3rd ed, 2016); Hupp JR, Ellis E, Tucker MR, Contemporary Oral and Maxillofacial Surgery (7th ed)

Knowledge: This is high caries risk driven by reduced salivary flow, root surface exposure and frequent sugars. Hyposalivation removes buffering, clearance and remineralising capacity, and medicines such as antidepressants and antihistamines are common causes. Risk assessment uses the history, clinical findings and saliva, and it shows that the plan should be personalised and not based on the number of lesions alone. High-fluoride toothpaste of 5000 ppm, fluoride varnish applied every 3 to 6 months, and diet change are the pillars of treatment, according to guidance such as Delivering Better Oral Health. Non-cavitated lesions can be remineralised, and cavitated lesions need selective, minimally invasive restoration.

Management: I would measure her unstimulated salivary flow or at least assess it clinically, ask her doctor to review whether her medicines can be changed, and review her diet with a diary. I would prescribe 5000 ppm fluoride toothpaste twice daily with no rinsing afterwards, fluoride varnish every 3 months at first, and a sugar-free product for dry mouth such as saliva substitutes and xylitol gum. I would advise on limiting sugar to mealtimes and on water between drinks. I would restore active cavitated lesions with glass ionomer or resin-modified glass ionomer, and use sealing of non-cavitated root lesions with fluoride varnish. Recall would be every 3 months with bitewings as justified by risk.

Ethics and communication: She should take part in setting the plan and the costs, and I would give her options such as the intensity of the visits and the materials. I would record the consent, advice and risk level. If her medicines are involved, I would write to her doctor and never change them myself. I would explain that fluoride is safe at these doses with the instructions given and that this plan will only work with her daily effort. Her health information is confidential under Federal Law No. 2 of 2019.

Reference: Public Health England, Delivering Better Oral Health: an evidence-based toolkit for prevention (4th ed, 2021); Pitts NB, Ekstrand KR, ICDAS and its International Caries Classification and Management System, ICCMS (Community Dent Oral Epidemiol 2013)

Knowledge: The data show a high burden with social inequality, so a combined strategy of upstream and targeted measures is best. The evidence supports fluoride toothpaste, topical fluoride varnish applied two to four times a year, and fissure sealants for children at higher risk, and Cochrane reviews show about a 43 percent reduction in decay increment with varnish. Education alone has a weak effect, and school policies on sugary drinks and snacks help. Surveillance uses standard methods from WHO's Oral Health Surveys Basic Methods (5th ed, 2013) with calibration of examiners. A proportionate universalism approach offers a basic programme to all and a more intense one for the high-risk.

Management: I would define aims, such as reducing the mean DMFT and the proportion with untreated decay over three years. The programme would include a supervised toothbrushing programme with fluoride toothpaste, varnish for all, extra visits and sealants for high-risk children identified by screening, a healthy school food policy, and referral pathways to clinics for children with pain. I would train school nurses and teachers, and calibrate examiners. I would evaluate with baseline and follow-up surveys, process indicators such as coverage, cost per child, and compare with schools that start later if possible. Results are published and fed back to the schools.

Ethics and communication: For children, consent to examination and treatment is given by the parent or guardian, so I would use an information sheet and consent form, with opt-out only if the school authority's policy allows and clear communication in the main languages. Data on children is health data protected by Federal Law No. 2 of 2019, so results should be coded and shared only as aggregated data where possible. I would ensure that screening does not stigmatise children and that every child found with disease has access to care, because screening without treatment is unethical.

Reference: WHO Oral Health Surveys: Basic Methods (5th ed, 2013); Marinho VCC et al, Fluoride varnishes for preventing dental caries in children and adolescents (Cochrane 2013); Peres MA et al, Oral diseases: a global public health challenge (Lancet 2019)

Knowledge: Screening should meet the Wilson and Jungner principles: an important health problem, a recognisable early stage, an accepted treatment that is better early, a suitable test, and a programme that is cost-effective with a pathway for diagnosis and care. The Kerala randomised trial in India found a mortality reduction in high-risk users of tobacco and alcohol after repeated visual screening, though not in the whole population. Cochrane reviews judge the evidence for population screening as insufficient, because the sensitivity and specificity of visual examination vary and overdiagnosis of benign lesions is possible. Targeting high-risk groups appears more efficient than screening everyone.

Management: I would recommend a targeted programme for high-risk adults, such as tobacco chewers and heavy drinkers over 40, delivered opportunistically in primary care, with training and calibration of the examiners. The programme requires a clear referral pathway to biopsy and specialist care within a set time, and cessation support offered at the same visit. I would plan a pilot with evaluation of detection rates, stage at diagnosis, false positives, referral completion and cost, before scaling. I would also invest in primary prevention with tobacco control and awareness, which has a greater long-term effect, and set up a register to follow patients with oral potentially malignant disorders.

Ethics and communication: Participation is voluntary and based on informed consent, with a clear explanation of the benefits and harms, including false positives and anxiety. It must not discriminate against groups, and in a multilingual community materials should suit the language and culture of tobacco users. Personal data and results are protected under Federal Law No. 2 of 2019. There is also an ethical obligation not to start screening if the system cannot provide timely diagnosis and treatment for those found.

Reference: Wilson JMG, Jungner G, Principles and Practice of Screening for Disease (WHO 1968); Sankaranarayanan R et al, Effect of screening on oral cancer mortality in Kerala, India: a cluster-randomised controlled trial (Lancet 2005); Brocklehurst P et al, Screening programmes for the early detection and prevention of oral cancer (Cochrane 2013)

Knowledge: The thin parakeratinised corrugated lining with palisaded, hyperchromatic basal cells is characteristic of an odontogenic keratocyst. It is a developmental odontogenic cyst, listed in the WHO 2022 classification as odontogenic keratocyst under cysts and no longer as a tumour. It has a high recurrence rate because of a thin friable lining, satellite cysts and growth along cancellous bone. Differential diagnosis includes ameloblastoma, in particular unicystic, orthokeratinised odontogenic cyst, dentigerous cyst and a gingival cyst. Multiple odontogenic keratocysts, especially in a young patient, suggest Gorlin syndrome (a PTCH1 mutation), with basal cell carcinomas, palmar pits and bifid ribs.

Management: I would report: odontogenic keratocyst, with a comment on the specimen being incisional and that a full evaluation requires the complete lesion. I would comment on the absence of dysplasia and ameloblastomatous change in the sampled tissue, and recommend that the entire specimen from the final surgery is submitted and examined. I would suggest the surgeon consider options: enucleation with peripheral ostectomy or Carnoy's solution use (where permitted), marsupialisation followed by enucleation, or resection in selected cases, with long-term follow-up for at least 5 years because recurrence can be late. I would suggest checking for Gorlin syndrome features if the patient has multiple cysts, and refer for genetic counselling if suspected.

Ethics and communication: A biopsy is a limited sample, and I must state this limitation openly in the report and not give false certainty. I would communicate directly with the surgeon if the clinical picture does not match, and ask for a repeat or deeper sample. Patient samples are labelled, traced and stored according to the laboratory's accreditation standards, and the findings are shared only with the treating team. If a sample is lost or mislabelled, I would report it as an incident and disclose it. Consent for the biopsy was the treating dentist's duty, in line with Cabinet Resolution No. 40 of 2019.

Reference: WHO Classification of Head and Neck Tumours (5th ed, 2022); Neville BW et al, Oral and Maxillofacial Pathology (4th ed, 2016)

Knowledge: Grading of oral epithelial dysplasia is subjective, with only moderate inter- and intra-observer agreement, so a discrepancy is expected. Features include architectural changes such as loss of polarity, drop-shaped rete ridges and abnormal keratinisation, and cytological atypia such as nuclear pleomorphism, hyperchromasia, abnormal mitoses and a higher nuclear-cytoplasmic ratio. WHO offers both a three-tier system and a binary low-grade and high-grade system, and the binary system has better reproducibility. Sampling matters, as a small biopsy can underestimate the worst area, and inflammation or a candidal infection can mimic atypia. The risk of malignant transformation is higher with high-grade dysplasia, but it is not certain.

Management: I would review the slides again with the clinical details, including the site, size, colour, texture and risk factors such as tobacco, and check for confounders, for example inflammation and candida. I would obtain an independent second opinion from an oral pathologist, blinded to my result if possible, and discuss the case in a multidisciplinary meeting. I would amend the report to state the grade, the features that support it, and the degree of uncertainty, in the binary system if that is local practice. I would advise correlation with the clinical picture and consider re-biopsy of the most suspicious area, then excision or close surveillance according to the team's discussion.

Ethics and communication: My report must not be changed to fit a surgical preference, and I would say so politely. I would be open with the clinician about the uncertainty, so the patient is told truthfully that grading is a judgment and that a second opinion is being sought, as his consent decisions depend on accurate information under Cabinet Resolution No. 40 of 2019. If a diagnostic error is found, I would amend the report, inform the clinician at once and record it as an incident. Slides and reports are kept and shared only as the law on health data, Federal Law No. 2 of 2019, allows.

Reference: WHO Classification of Head and Neck Tumours (5th ed, 2022); Warnakulasuriya S et al, Oral epithelial dysplasia classification systems: predictive value, utility, weaknesses and scope for improvement (J Oral Pathol Med 2008)

Knowledge: Behaviour changes such as food refusal, face holding and self-injury are often the only sign of dental pain in people with severe intellectual disability. Epilepsy raises particular issues: seizures can be triggered by pain, sleep loss or missed medicines, and some antiepileptics cause gingival overgrowth or xerostomia. Capacity is decision-specific and time-specific: he may be unable to understand and weigh the information about GA, and then treatment must be in his best interests with the legal representative. The least restrictive approach that is safe comes first, including desensitisation, behaviour support, sedation with oral or intranasal midazolam in some cases, and GA when treatment is extensive or other methods fail.

Management: I would take a careful history from the carers, including the pain behaviour, medicines, last seizure, allergies and medical risks, and see him in a familiar environment with a carer he trusts. I would use tell-show-do adapted for him, visual aids and short appointments, and try a gentle examination with a mirror and light and an extra-oral exam. If I find a clear source and he cannot cooperate, I would plan treatment under GA or sedation at a hospital with a medical review, a full examination, radiographs and all needed dental treatment done in one session, including prevention. I would check the antiepileptic plan with his neurologist before fasting, and review after the procedure with a prevention plan for the carers.

Ethics and communication: A person with disability keeps his rights and dignity, and I would explain things in a way he can understand and look for his assent. Consent for treatment, when he lacks capacity, comes from his legal representative as in Cabinet Resolution No. 40 of 2019, not from the care home manager alone, and the decision is documented as being in his best interests with the least restrictive option. Emergency treatment of acute pain and infection can proceed on the same principle. I would keep him informed throughout, protect his information under Federal Law No. 2 of 2019, and avoid restraint other than that justified, necessary and proportionate.

Reference: Scully C, Special Care in Dentistry: Handbook of Oral Healthcare (2007); British Society for Disability and Oral Health, Clinical Guidelines and Integrated Care Pathways for the Oral Health Care of People with Learning Disabilities (2012)

Knowledge: Parkinson's disease causes tremor, rigidity, slow movements and dysphagia, so oral hygiene falls, and drooling and food pocketing increase. Poor oral hygiene and dysphagia raise the risk of aspiration pneumonia, as oral bacteria are aspirated, and studies of nursing home residents show that professional oral care reduces pneumonia. Levodopa can cause dry mouth, dyskinesia and orthostatic hypotension on rising from the chair, and dentures may need adjustment as the muscle control changes. Dental treatment is best done in the morning during the 'on' phase of medication. I would also check for oral candidiasis and denture stomatitis.

Management: I would do a full oral examination, check the denture fit and hygiene, assess for dysphagia signs with the speech and language therapist, and plan treatment. I would scale and treat gingivitis, remove hopeless teeth only if they cause problems, and reline or adjust the denture, labelling it with her name. I would give daily care steps to the carers: brushing with a powered toothbrush with a larger handle, 1450 ppm fluoride toothpaste in a small amount, cleaning the denture daily and removing it at night, and the mouth swab. Fluoride varnish and chlorhexidine for short-term use may help. I would sit her upright, give short appointments in the morning, and review in 3 months with carer training.

Ethics and communication: I would speak with the patient directly, check her capacity for each decision and involve her family and nursing home staff with her agreement. Her wishes about treatment are respected, and when she cannot decide, I would act in her best interests with her legal representative's consent under Cabinet Resolution No. 40 of 2019. Her care plan should be shared with the nursing team to make it work, and her data protected under Federal Law No. 2 of 2019. I would not leave care to chance, and I would document the training given to staff.

Reference: Sjogren P et al, A systematic review of the preventive effect of oral hygiene on pneumonia and respiratory tract infection in elderly people in hospitals and nursing homes (J Am Geriatr Soc 2008); Scully C, Special Care in Dentistry (2007)

Knowledge: This pattern of erosion on palatal and occlusal surfaces with restorations standing proud suggests extrinsic acid from drinks and intrinsic acid from reflux, with attrition possibly contributing. A BEWE sum of 14 falls in the high-risk band (14 or above), so active management is needed. Restoring without controlling the cause leads to failure. Tooth wear is multifactorial, so I would assess bruxism, diet, reflux, vomiting and eating disorders, and medicines. Rehabilitation should be as conservative as possible, and I should find out if she has lost vertical dimension. Often the occlusion is maintained by dentoalveolar compensation.

Management: First I would take a thorough history, diet analysis, photographs and study models, and measure the progression over several months, using a stable record. I would refer her to her doctor for reflux review, provide dietary advice, tooth-friendly habits such as not brushing immediately after acid, and give fluoride toothpaste, a remineralising paste and desensitisers. For restorations, I would use direct bonded composite, with a Dahl approach if space is needed, and avoid full-coverage crowns and veneers in young adults with a good substance left. I would stage the work, with a diagnostic wax-up and a mock-up to test aesthetics and occlusion, and delay indirect restorations until the wear is stable. Complex full-mouth rehabilitation would go to a prosthodontist.

Ethics and communication: I would ask her honestly what she wants and what is realistic. I would explain the options, including no treatment and monitoring, minimal bonding, indirect restorations, and what each costs and how long it lasts. She must understand that restorations on a worn dentition need maintenance and that failures are likely if the cause is not controlled. This consent discussion is recorded as part of the informed consent required by Cabinet Resolution No. 40 of 2019. I would be sensitive when asking about vomiting or eating disorders, and I would maintain confidentiality under Federal Law No. 2 of 2019.

Reference: Bartlett D et al, Basic Erosive Wear Examination (BEWE) (Clin Oral Investig 2008); Loomans B et al, Severe tooth wear: European consensus statement on management guidelines (J Adhes Dent 2017)

Knowledge: The best predictor of survival of a root-filled tooth is the amount of remaining coronal tooth structure and a ferrule, which is a 1.5 to 2 mm band of sound dentine encircled by the crown margin. A post does not strengthen the root, and may weaken it, but retains the core when there is little coronal structure. With no ferrule the prognosis is reduced and the fracture risk increases, and fibre posts fail by debonding, while cast metal posts fail by root fracture. Options to create a ferrule include surgical crown lengthening, which needs adequate root length and avoids exposing the furcation and harming the crown-root ratio, and orthodontic extrusion. A premolar has high occlusal load laterally and needs cuspal coverage.

Management: I would examine the periodontal status, the probing depths, the biologic width, the occlusion, the remaining root length and the patient's caries risk, and check if the tooth is strategic. If the root length and periodontal support are adequate, I would perform crown lengthening to gain 2 mm of ferrule, or orthodontic extrusion if aesthetics or adjacent bone are a problem. Then I would place a bonded fibre post with a resin core, with rubber dam isolation and a coronal seal, and a full crown with a 360 degree ferrule. If a ferrule cannot be made without compromising the tooth, I would discuss extraction and replacement with an implant, taking into account that it is better to extract early than late. I would review the occlusion and monitor the tooth.

Ethics and communication: I would give him an honest estimate of the prognosis, the cost and the alternatives, including no further treatment, an adhesive restoration with an uncertain life, extraction and an implant or bridge, and the risk of fracture requiring extraction. His consent would be recorded as required by Cabinet Resolution No. 40 of 2019, with the risk of failure explained. I would not promise that the tooth will last and would be honest about the limits of my competence, referring for periodontal surgery if I do not do it. Documentation would include radiographs and the discussion.

Reference: Stankiewicz NR, Wilson PR, The ferrule effect: a literature review (Int Endod J 2002); Juloski J et al, Ferrule effect: a literature review (J Endod 2012); Hargreaves KM, Berman LH, Cohen's Pathways of the Pulp (12th ed, 2021)

Knowledge: Periodontitis must be controlled before restorative or implant treatment, and the EFP S3 guideline on the treatment of stage I to III periodontitis (2020) describes a stepwise approach. Step 1 includes behaviour change, oral hygiene, supragingival cleaning and risk factor control such as smoking cessation and diabetes optimisation. Step 2 is subgingival instrumentation, step 3 addresses non-responding sites with surgery, and step 4 is supportive periodontal care. Smoking increases the risk of periodontitis progression and implant failure, and I would want her to reduce or stop. Pathological migration of incisors often improves after inflammation is controlled, so I would not plan restorations until the periodontal condition is stable and the new position is clear.

Management: I would first take a complete assessment: full-mouth charting, radiographs, pulp tests, occlusal analysis, photographs, risk assessment and medical liaison. I would assign a prognosis to each tooth, and decide strategic extractions only for those hopeless. The sequence would be: urgent and stabilisation phase, step 1 and 2 periodontal therapy with smoking cessation support, reassessment at 8 to 12 weeks, surgical treatment for residual pockets, then orthodontic repositioning if desired and replacement of the lower molars with implants or a bridge, only after periodontal stability. I would coordinate periodontist, endodontist, orthodontist and prosthodontist, with a written plan, and supportive periodontal care every 3 to 4 months. Implant placement is staged, with a clear commitment to maintenance.

Ethics and communication: I would explain candidly that her disease and smoking limit what is possible and that speed would harm the result. I would offer realistic options, including a simpler plan that retains teeth and restores function, and let her decide with the costs and timescales. Consent to each phase is documented under Cabinet Resolution No. 40 of 2019, and if treatment fails because of non-compliance, the record of advice helps protect both. As consultant, I take responsibility for the plan and for the supervision of the colleagues who carry it out, in line with Federal Decree-Law No. 4 of 2016.

Reference: Sanz M et al, Treatment of stage I-III periodontitis: the EFP S3 level clinical practice guideline (J Clin Periodontol 2020); Tonetti MS et al, Staging and grading of periodontitis (J Clin Periodontol 2018)

Knowledge: A wrong-site extraction is a serious preventable incident, often called a never event, usually due to failures in the process such as no pre-procedure check, wrong chart, poor teamwork or time pressure. The patient has lost a healthy tooth and still has the problem tooth, and so has suffered harm and is owed prompt corrective action. Root cause analysis looks at systems and not only at the individual, but the individual remains accountable. Reimplantation of the extracted tooth may be possible if it is done quickly, as a tooth kept in a suitable medium and replaced within about an hour has a reasonable chance, though a second molar's prognosis is variable.

Management: I would first see whether the extracted tooth can still be replanted, and call the patient back immediately, the same day, and not wait. I would meet her with the junior dentist, state clearly what happened, apologise, explain the options (reimplant if feasible, treat the correct tooth, replacement options at no charge), and take responsibility. I would arrange for the correct treatment promptly and plan for follow-up. I would report the incident through the facility's incident system and to the authority as policy requires, notify the indemnity provider, record the facts and secure the records. Later I would carry out a root cause analysis, introduce a time-out and site verification at each extraction with chart, radiograph and patient confirmation, and support the junior dentist with a review of his practice.

Ethics and communication: Honest disclosure is a principle I follow, and it fits with the duty of care and the liability framework of Federal Decree-Law No. 4 of 2016 on medical liability, under which practitioners answer for harm caused by error, so concealment would only add to the liability. The consent obtained was for a different tooth, so the extraction was without valid consent under Cabinet Resolution No. 40 of 2019. I would not alter or back-date records, and I would document the event only with facts and times. I would be fair to the junior dentist, and ensure he has support but remains accountable for his actions. I would also offer the patient a route to a complaint.

Reference: Federal Decree-Law No. 4 of 2016 on Medical Liability (UAE); WHO Patient Safety Curriculum Guide (Multi-professional Edition, 2011); Andreasen JO et al, Textbook and Color Atlas of Traumatic Injuries to the Teeth (5th ed, 2019)

Knowledge: This is anaphylaxis, an acute and potentially fatal systemic allergic reaction with airway, breathing or circulation compromise, here after a drug exposure. The first-line treatment is intramuscular adrenaline 0.5 mg (0.5 mL of 1 mg/mL, 1:1000) into the anterolateral thigh for adults, and the dose can be repeated after 5 minutes if there is no improvement. Delay in giving adrenaline is the main cause of death, and antihistamines and steroids are secondary and do not treat airway or circulatory compromise. Positioning matters: lie flat with legs raised, or sit if breathing is difficult, and do not stand her up as this can cause arrest. Biphasic reactions can occur up to 72 hours later.

Management: I would stop the drug, call the emergency number, and allocate roles aloud: one to call and meet the paramedics, one to give oxygen at high flow, one to record times and observations, and I give adrenaline IM at once. I would lay her flat with raised legs, give high-flow oxygen, and establish IV access for fluid boluses of 500 to 1000 mL of crystalloid if there is persistent hypotension. If there is no response, I would repeat the IM adrenaline at 5-minute intervals and prepare for basic life support. After stabilisation, she must go to hospital for observation for at least 6 to 12 hours, and be referred for allergy testing with a mast cell tryptase sample ideally taken within 1 to 2 hours of onset. I would run regular emergency drills and check the emergency kit weekly.

Ethics and communication: After the event I would explain what happened and what she must avoid, give a written allergy alert and ensure it is added to her medical record, and report the reaction to the adverse drug reaction system. I would record the exact times and doses. I would review my own prescribing check, such as the allergy history taken before prescribing, and the team's response. Informed consent for medicines includes common risks, but emergency treatment is given without consent when she cannot decide, as in Cabinet Resolution No. 40 of 2019. Staff should be trained in resuscitation under the facility's requirements.

Reference: Resuscitation Council UK Emergency treatment of anaphylactic reactions (2021); World Allergy Organization Anaphylaxis Guidance (Cardona et al, 2020)

Knowledge: IV bisphosphonates for osteoporosis, and especially four years of exposure, carry a higher risk of MRONJ than oral drugs, though the risk in osteoporosis, in the order of 0.1 percent or less, is far lower than in cancer patients on high-dose therapy, and rises with extractions, dentoalveolar surgery, rheumatoid arthritis, steroid and poor hygiene. The AAOMS 2022 position paper defines MRONJ by current or previous antiresorptive therapy, exposed bone or bone that can be probed through a fistula for more than 8 weeks, and no radiation history. The main aim is prevention and early treatment of infection. An infected, mobile tooth in this setting must still be dealt with, and leaving infection is also a risk. Drug holidays have no clear evidence and are the decision of the prescribing physician.

Management: I would assess her fully, examine the area and the oral hygiene, and take an image. I would consider if the tooth can be treated conservatively, with root canal treatment or by periodontal splinting, but a mobile and infected tooth is likely to need extraction. If it must be removed, I would do so by an experienced operator as atraumatically as possible, with antibiotic cover as advised, smooth any sharp bone edges, aim for primary closure, and use chlorhexidine and review at 1 and 4 weeks. I would inform her physician and consider the specialist oral surgery unit for the operation if I think it is beyond the junior's competence. A follow-up for at least 8 weeks, and the explanation of warning signs such as pain, swelling or exposed bone, are part of the plan.

Ethics and communication: The patient must be told clearly about the small but serious risk of MRONJ and the risk of not removing the tooth, and about alternatives, in line with the informed consent rules of Cabinet Resolution No. 40 of 2019. I would document the discussion, and decide with her. I would not change her osteoporosis treatment myself and would contact the prescriber. As a consultant, my duty is to supervise the junior dentist and to make sure that he works within his competence, and to teach, in line with the responsibilities described in Federal Decree-Law No. 4 of 2016.

Reference: Ruggiero SL et al, American Association of Oral and Maxillofacial Surgeons Position Paper on Medication-Related Osteonecrosis of the Jaw: 2022 Update (J Oral Maxillofac Surg 2022); Khan AA et al, Diagnosis and management of osteonecrosis of the jaw: a systematic review and international consensus (J Bone Miner Res 2015)