DHA Dental Lab Technician exam questions
Dental materials, crown and bridge, dentures, orthodontic appliances.
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DHA Dental Lab Technician exam at a glance
- Exam code
- DLT5521
- Questions
- 150 MCQs
- Duration
- 3 hours
- Pass mark
- 55%
- Fee per attempt
- USD 240 (about AED 880)
- Result
- Pass or fail, no score
From the DHA CBT Guideline, Sep 2026. Delivered by Prometric; three attempts in total across the UAE authorities. Full DHA exam guide.
Try two questions from this bank
Original questions from the bank - pick an answer to see the rationale and reference.
A dentist requests replacement of the entire acrylic base of a complete denture while keeping the existing teeth. What is this procedure called?
Choose an answer to see the rationale.
During flasking of a complete denture, which material is painted on the gypsum mould before packing acrylic?
Choose an answer to see the rationale.
Not sure where you stand? Sit 12 of these questions free, timed at real exam pace, and see which domains you are weakest in.
Take the free mock exam →Liked those? The full bank has 450 questions at this standard - every one with a rationale and a reference.
Get the full bank - AED 179What's inside
- ✓3 full-length papers (~150 Q each)
- ✓450 questions, no overlap between papers
- ✓Four options, one unambiguous best answer
- ✓A full rationale on every question
- ✓A real guideline or textbook reference
- ✓Every sub-topic in the published blueprint
The Dental Lab Technician exam in every GCC country
| Regulator | Exam | Format | Pass mark | Fee per attempt | Practise |
|---|---|---|---|---|---|
| DHA Dubai | Dental Lab Technician (DLT5521) | 150 MCQs in 3 hours | 55% | USD 240 (about AED 880) | DHA questions → |
| DOH Abu Dhabi, Al Ain and Al Dhafra | DOH licensing exam Regulator-wide format | Written + oral/OSCE | Pass / fail only | Not published | DOH questions → |
| MOHAP Northern Emirates - Ajman, Umm Al Quwain, Ras Al Khaimah and Fujairah | MOHAP licensing exam Regulator-wide format | Computer-based | Not published | Not published | MOHAP questions → |
| SHA Emirate of Sharjah | SHA licensing exam Regulator-wide format | Set at assessment | Not published | Not published | SHA questions → |
| SCFHS Kingdom of Saudi Arabia | SCFHS licensing exam Regulator-wide format | 200 MCQs, 240 min | 500-560 of 800 | Not published | SCFHS questions → |
| QCHP State of Qatar | Dental Lab Technician | 150 MCQs in 3 hours | 50% | Not published | QCHP questions → |
| NHRA Kingdom of Bahrain | NHRA licensing exam Regulator-wide format | Prometric CBT | Not published | Not published | NHRA questions → |
| OMSB Sultanate of Oman | OMSB licensing exam Regulator-wide format | Computer-based OC exam | Not published | Not published | OMSB questions → |
| Kuwait MOH State of Kuwait | Kuwait MOH licensing exam Regulator-wide format | 150 MCQs, 170 min | 60-70% | Not published | Kuwait MOH questions → |
exact exam published for Dental Lab Technician
From each regulator's own exam pages; anything a regulator does not publish says so. Assessment mode also depends on your licence title, so confirm your route on your eligibility notice.
Try 15 free Dental Lab Technician questions with answersDifferent from the samples on this page - each with a full explanationStart →What the Dental Lab Technician exam covers
The published blueprint for this exam breaks into 8 domains and 46 testable sub-topics. Our bank covers every one of them - here is the full map, so you can see exactly what you are expected to know.
Dental Materials Science~16%6 topics
- Gypsum products: types, water-powder ratio, setting expansion
- Impression materials: alginate and elastomers
- Investments: gypsum-bonded and phosphate-bonded
- Denture base resins: polymerisation and porosity
- Dental alloys: noble, base metal and titanium
- Waxes and their properties
Fixed Prosthodontics and Metal-Ceramics~16%7 topics
- Die preparation and die spacer
- Wax pattern and spruing
- Lost-wax casting and casting defects
- Metal-ceramic bonding and thermal expansion
- Porcelain build-up, firing and glazing
- Pontic design
- Post and core fabrication
All-Ceramic Restorations and CAD/CAM~12%5 topics
- Lithium disilicate: pressing and crystallisation
- Zirconia: sintering shrinkage and transformation toughening
- Surface treatment of ceramics for bonding
- Digital workflow: scanning, design and STL files
- Milling and 3D printing
Removable Partial Dentures~14%6 topics
- Kennedy classification and Applegate's rules
- Surveying and path of insertion
- Clasp design and undercut depth
- Major and minor connectors
- Rests and rest seats
- Cobalt-chromium framework casting
Complete Dentures~12%6 topics
- Record blocks and jaw relationship records
- Posterior palatal seal
- Tooth selection and arrangement
- Occlusal schemes for complete dentures
- Flasking, packing and processing
- Relining, rebasing and repairs
Orthodontic and Other Appliances~8%5 topics
- Removable orthodontic appliances: clasps and springs
- Retainers
- Occlusal splints and sports mouthguards
- Soldering and welding
- Wire properties: stainless steel and nickel-titanium
Dental Anatomy, Occlusion and Articulators~10%5 topics
- Tooth notation systems
- Crown morphology of permanent teeth
- Occlusal curves and planes
- Facebow transfer and articulator types
- Mandibular movements and condylar guidance
Laboratory Safety, Infection Control and Ethics~12%6 topics
- Disinfection of impressions and appliances
- Dust, silica and local exhaust ventilation
- Chemical hazards: monomer, acids and beryllium
- Personal protective equipment
- Laboratory prescriptions and communication with the dentist
- Medical device regulations and record keeping
6 worked Dental Lab Technician practice questions
Original exam-style questions from the bank, spread across the blueprint domains. They are not real or recalled exam questions. Try each one, then open the answer for the rationale and reference. None of them appear in the free mock exam, so reading them will not spoil it.
Question 1 · All-Ceramic Restorations and CAD/CAM
Why is a pre-sintered zirconia framework milled larger than the final restoration?
- ATo allow for later veneering porcelain expansion
- BTo leave extra material for later hand finishing
- CTo compensate for about 20-25% sintering shrinkage
- DTo compensate for cement thickness
Show answer and explanation
Correct answer: C. To compensate for about 20-25% sintering shrinkage
Zirconia shrinks roughly 20-25% linearly during sintering, so the software enlarges the design to match. Hand finishing and cement space are minor and not the reason for oversizing.
Reference: Sakaguchi, Craig's Restorative Dental Materials, 14th ed.
Question 2 · Dental Anatomy, Occlusion and Articulators
A lab prescription asks for a crown on tooth 36 (FDI notation). Which tooth is this?
- AMaxillary left first molar
- BMandibular right first molar
- CMandibular left second premolar
- DMandibular left first molar
Show answer and explanation
Correct answer: D. Mandibular left first molar
In FDI notation, quadrant 3 is the mandibular left and tooth 6 is the first molar. Quadrant 2 would be maxillary left and quadrant 4 mandibular right.
Reference: ISO 3950 Dentistry: Designation system for teeth
Question 3 · Dental Materials Science
A technician needs a die for a cast crown that resists abrasion during waxing and has low setting expansion. Which gypsum product is most suitable?
- AType II low-strength model plaster
- BType I impression plaster
- CType III dental stone
- DType IV high-strength die stone
Show answer and explanation
Correct answer: D. Type IV high-strength die stone
Type IV die stone has the highest strength and surface hardness with low setting expansion, making it ideal for dies. Type III stone is for working casts of dentures and is less abrasion-resistant.
Reference: Craig's Restorative Dental Materials, 14th ed.
Question 4 · Fixed Prosthodontics and Metal-Ceramics
Why is the porcelain in a metal-ceramic crown formulated with a coefficient of thermal expansion slightly lower than that of the alloy?
- ATo leave porcelain in residual compression
- BTo leave porcelain in residual tension
- CTo lower the firing temperature
- DTo improve translucency of opaque
Show answer and explanation
Correct answer: A. To leave porcelain in residual compression
On cooling, the alloy contracts slightly more than the porcelain, placing the porcelain in residual compression; ceramics resist compression far better than tension. A porcelain with higher expansion than the alloy would be in tension and craze or crack.
Reference: Anusavice, Phillips' Science of Dental Materials, 12th ed.
Question 5 · Fixed Prosthodontics and Metal-Ceramics
A cast crown shows a porous area where the sprue joins the casting. What is the most likely cause and correction?
- AGas porosity; lower the alloy casting temperature
- BInvestment inclusion; vibrate the investment more
- CSuck-back porosity; use a thicker sprue or reservoir
- DBack-pressure porosity; use a thinner sprue
Show answer and explanation
Correct answer: C. Suck-back porosity; use a thicker sprue or reservoir
Suck-back porosity forms at the sprue junction when that area solidifies last and pulls metal from the casting; a larger sprue or reservoir keeps the sprue molten longer. Back-pressure porosity occurs on the outer surface where gas cannot escape, not at the sprue junction.
Reference: Anusavice, Phillips' Science of Dental Materials, 12th ed.
Question 6 · Laboratory Safety, Infection Control and Ethics
A technician develops fingertip dermatitis after handling acrylic dough while wearing latex gloves. What is the most likely explanation?
- AMethyl methacrylate passes through latex gloves
- BLatex gloves fully block methacrylates
- CThe reaction is caused by gypsum dust
- DHeat-cured acrylic dough contains no free monomer
Show answer and explanation
Correct answer: A. Methyl methacrylate passes through latex gloves
Methyl methacrylate monomer penetrates latex and vinyl gloves within minutes and is a common cause of allergic contact dermatitis in technicians. Avoiding direct contact and using more resistant gloves reduces exposure.
Reference: Anusavice, Phillips' Science of Dental Materials, 12th ed.
Last reviewed September 2026
About these questions: every question is original, written to the published blueprint, with a rationale and a reference. No recalled or leaked exam content is used. How we write our questions.
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