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Iran Medical Residency Entrance Examination (آزمون دستیاری تخصصی پزشکی)

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Key Facts: Iran Dental Residency Entrance Exam Exam

250

Total four-option multiple-choice questions on the official national specialty entrance examination

Sanjesh Pezeshki official exam regulations

250 min

Total continuous testing duration, allowing exactly 60 seconds per question

Sanjesh Pezeshki official exam regulations

+3 / -1

Negative marking formula: +3 marks for correct, -1 mark deduction for incorrect, 0 for blank

Council for Dental and Specialized Education guidelines

Clinical, basic, and supportive dental domains evaluated on the national blueprint

Secretariat of the Council for Dental and Specialized Education

Annual

Frequency of administration, typically held in late spring (Ordibehesht or Khordad)

Sanjesh Pezeshki national academic examination calendar

The Iranian Dental Residency Entrance Exam (Dastyari Dandanpezeshki) is a high-stakes, 250-question, 250-minute nationwide examination administered annually by Sanjesh Pezeshki. With +3 / -1 negative marking and discipline-specific coefficient multipliers, it determines competitive allocation into all Iranian postgraduate dental residency positions.

Sample Iran Dental Residency Entrance Exam Practice Questions

Try these sample questions to review concepts for the Iran Dental Residency Entrance Exam exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1According to Ante's law in fixed prosthodontics, what is the biomechanical prerequisite regarding the pericemental area of abutment teeth supporting a fixed partial denture?

A.The root surface area of the abutment teeth must equal or exceed that of the teeth being replaced

B.The clinical crown-to-root ratio of abutment teeth must be at least two-to-one under all occlusal schemes

C.The combined occlusal table width of abutments must be twice that of the prosthetic pontics

D.The mobility index of each individual abutment tooth must be strictly zero on the Miller classification

Explanation: Ante's law states that the combined pericemental root surface area of all abutment teeth supporting a fixed partial denture should be equal to or greater than the pericemental area of the teeth scheduled for replacement. This guideline ensures sufficient periodontal ligament support to distribute masticatory shear and compressive forces without inducing secondary occlusal trauma.

2When preparing a maxillary central incisor for an all-ceramic lithium disilicate crown, what is the recommended finish line geometry and depth to minimize marginal stress concentration?

A.A zero-depth feather-edge finish line to preserve the maximum amount of cervical enamel

B.A rounded shoulder or deep heavy chamfer of approximately 1.0 mm to 1.2 mm depth

C.A 90-degree shoulder margin with an acute sharp internal line angle to maximize frictional resistance

D.A knife-edge preparation placed 1.5 mm subgingivally to hide restorative metal opacity

Explanation: All-ceramic restorations like lithium disilicate require a rounded shoulder or deep continuous chamfer of 1.0 to 1.2 mm to provide bulk for material strength and reduce ceramic stress concentrations. The internal line angle must be rounded because sharp angles act as stress raisers that initiate catastrophic ceramic fracture under function.

3In designing a mandibular removable partial denture for a Kennedy Class I arch where the patient exhibits a shallow lingual sulcus with only 5 mm of space between the active floor of the mouth and the marginal gingiva, which major connector is indicated?

A.Standard lingual bar

B.Sublingual bar with horizontal tissue shelf

C.Lingual plate (linguoplate)

D.Labial bar with swing-lock mechanism

Explanation: A lingual plate is specifically indicated when vertical clearance between the active floor of the mouth and the free gingival margin is less than the 7 to 8 mm required for a standard lingual bar (which needs 4 mm for bar height plus at least 3 mm of space from marginal gingiva). The plate covers the lingual surfaces of the anterior teeth above the cingula, accommodating the shallow vestibule without impinging on mobile floor tissues.

4What is the primary biomechanical purpose of an indirect retainer in a distal extension removable partial denture (Kennedy Class I or II)?

A.To prevent vertical displacement of the denture base toward the residual edentulous ridge during mastication

B.To splint mobile anterior teeth together against lateral and transverse horizontal forces

C.To replace the retentive clasp arm on the terminal abutment tooth to reduce enamel wear

D.To counteract rotational dislodgment of the distal extension base away from the residual ridge around the fulcrum line

Explanation: In distal extension RPDs, sticky foods or muscle action can lift the denture base away from the basal seat, causing the prosthesis to rotate around the primary fulcrum line passing through the rests of terminal abutments. An indirect retainer placed as far anterior to the fulcrum line as feasible counteracts this upward movement through mechanical lever-arm action.

5In complete denture prosthodontics, which compensating curve represents the anteroposterior curvature of the occlusal surfaces, beginning at the tip of the mandibular canine and following the buccal cusps to the anterior border of the ramus?

A.Curve of Wilson

B.Curve of Spee

C.Monson spherical sphere

D.Pleasure reverse curve

Explanation: The Curve of Spee is the anatomic anteroposterior curve that begins at the canine cusp tip, continues along the buccal cusp tips of premolars and molars, and extends through the anterior border of the mandibular ramus. In complete denture fabrication, establishing this curve is crucial for achieving balanced bilateral occlusion during mandibular protrusion.

6What anatomical landmarks define the anterior and posterior boundaries of the vibrating line region for establishing the posterior palatal seal in a maxillary complete denture?

A.Between the incisive papilla anteriorly and the pterygomaxillary notches laterally

B.Between the palatine foveae anteriorly and the uvula tip posteriorly

C.Between the anterior vibrating line (junction of hard and soft palate) and the posterior vibrating line (junction of moving and non-moving soft palate)

D.Between the hamular notches anteriorly and the retromolar pads posteriorly

Explanation: The posterior palatal seal area is bounded anteriorly by the anterior vibrating line (which demarks the junction between the immobile hard palate and the aponeurosis of the soft palate during gentle phonation) and posteriorly by the posterior vibrating line (which demarks the transition between limited movement and vigorous elevation of the soft palate during saying 'ah'). This compressible glandular zone permits border seal without inducing gagging or displacement.

7In restoring an endodontically treated premolar with a cast post and core, what is the minimum circumferential vertical height of sound tooth structure required above the preparation finish line to provide an adequate ferrule effect?

A.0.5 mm of enamel on the facial aspect only

B.1.0 mm of resin composite core material encircling the canal orifice

C.At least 1.5 to 2.0 mm of sound vertical dentin wall with 1.0 mm wall thickness

D.3.5 to 4.0 mm of dentin extending into the furcation groove

Explanation: A ferrule is a 360-degree collar of sound dentin encompassing the tooth preparation that is engaged by the artificial crown. Biomechanical studies demonstrate that a minimum of 1.5 to 2.0 mm of vertical sound dentin height with at least 1.0 mm of dentin wall thickness is necessary to disperse functional lateral stresses, protect the post-dentin interface, and prevent catastrophic vertical root fracture.

8Following the insertion of an immediate complete denture, when should the patient's first clinical recall examination be scheduled, and what is the instruction regarding denture removal during this initial period?

A.At 24 hours post-insertion; the patient must not remove the denture until the clinician inspects the surgical sites

B.At 7 days post-insertion; the patient should remove the denture every night before bed

C.At 48 hours post-insertion; the patient must remove the denture every 4 hours to rinse with hot water

D.At 3 weeks post-insertion; the denture must be adjusted only after full soft tissue epithelialization

Explanation: The initial recall for an immediate complete denture must occur exactly 24 hours post-operatively. The patient is instructed not to remove the prosthesis under any circumstance during this first 24 hours, because post-extraction edema would swell the mucoperiosteum, preventing the patient from reinserting the denture and causing severe pain and prolonged hemorrhage.

9Which phenomenon describes the posterior separation of maxillary and mandibular teeth during mandibular protrusion when arranging teeth on a flat plane without compensating curves, and how is it compensated for on a semi-adjustable articulator?

A.Bennett movement; compensated by adjusting the progressive side shift angle (L-angle)

B.Fisher angle; compensated by modifying the intercondylar width on an arcon frame

C.Christensen phenomenon; compensated by incorporating the Curve of Spee and adjusting the horizontal condylar guidance angle

D.Monson curve; compensated by increasing the canine disocclusion angle on the anterior guide table

Explanation: Christensen phenomenon is the creation of a wedge-shaped space between the posterior occlusal surfaces of maxillary and mandibular teeth when the mandible moves forward into protrusion. On a semi-adjustable articulator, recording this protrusion using a wax or polyvinyl siloxane interocclusal record permits accurate setting of the horizontal condylar inclination, and incorporating the Curve of Spee into tooth arrangement prevents this posterior disocclusion to achieve balanced occlusion.

10In the RPI clasp assembly used for distal extension removable partial dentures, which component configuration allows the clasp arm to disengage from the tooth under masticatory loading to prevent harmful torsional stress on the abutment?

A.Distal rest, Lingual plate, and Buccal circumferential Akers clasp placed in the occlusal third

B.Incisal rest, Proximal plate, and Circumferential cast wire placed below the survey line

C.Mesial rest, Lingual bar, and Ring clasp engaging an undercut adjacent to the edentulous space

D.Mesial rest, Distal proximal plate, and I-bar retainer engaging a 0.010-inch mid-buccal or mesiobuccal undercut

Explanation: The RPI system comprises a Mesial rest (R), a distal Proximal plate (P), and an I-bar (I). Under occlusal loading on the distal extension base, the center of rotation is situated at the mesial rest; consequently, both the I-bar and the distal proximal plate disengage downwards and forwards into the cervical gingival embrasure rather than torquing the abutment tooth distally.

About the Iran Dental Residency Entrance Exam Exam

The Iranian National Entrance Examination for Dental Specialty Residency (آزمون پذیرش دستیار تخصصی دندانپزشکی - Dastyari Dandanpezeshki) is the premier, highly competitive gateway through which licensed Doctor of Dental Surgery (DDS) graduates in the Islamic Republic of Iran compete for post-graduate clinical specialty training positions. Conducted annually by the National Center for Health Assessment (Sanjesh Pezeshki) under the supervision of the Secretariat of the Council for Dental and Specialized Education, the examination governs placement across all accredited dental faculties nationwide, including premier institutions such as Tehran University of Medical Sciences (TUMS), Shahid Beheshti University of Medical Sciences, Isfahan University of Medical Sciences, Shiraz University of Medical Sciences, and Mashhad University of Medical Sciences. The official examination comprises 250 four-option multiple-choice questions administered over 250 minutes (averaging 60 seconds per item). The blueprint spans 13 core domains: Prosthodontics (Fixed, Removable, Maxillofacial, Occlusion; ~12%), Oral and Maxillofacial Pathology (~8%), Orthodontics and Dentofacial Orthopedics (~8%), Endodontics and Pulpal Biology (~8%), Periodontics and Implant Surgery (~8%), Oral Medicine, Diagnosis and Pharmacotherapy (~8%), Oral and Maxillofacial Surgery and Trauma (~8%), Restorative and Esthetic Dentistry (~8%), Pediatric Dentistry (~8%), Oral and Maxillofacial Radiology (~8%), Dental Materials and Applied Science (~6%), Community Oral Health and Epidemiology (~4%), and Professional English (~4%). A hallmark of the examination is its strict negative marking system: each correct answer confers +3 marks, each incorrect choice deducts -1 mark, and blank questions yield 0 marks, yielding a theoretical raw score range from -250 to +750. Performance in each discipline is further weighted according to specialized coefficient multipliers (Zarayeb) specific to each specialty training program. Admissions also incorporate national quota regulations (Sahmiyeh Azad, Sahmiyeh Isargaran, and native regional commitment quotas). This practice bank is an independent English-language MCQ study adaptation authored by OpenExamPrep. Comprising 100 meticulously structured practice questions, it provides conceptual explanations and distractor analyses to assist dental clinicians and residency aspirants in mastering core clinical principles. The official examination is conducted in Persian; this resource is an independent educational aid and is neither an official translation nor sponsored by Sanjesh Pezeshki.

Exam sponsor: National Center for Health Assessment / Sanjesh Pezeshki (مرکز سنجش آموزش پزشکی) & Council for Dental and Specialized Education (شورای آموزش دندانپزشکی و تخصصی). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Administered annually across national academic dental hubs under the authority of Sanjesh Pezeshki and the Council for Dental and Specialized Education, the examination features 250 multiple-choice questions administered in a 250-minute testing block. Scoring employs an exact negative marking scheme: each correct answer yields +3 points, each incorrect answer incurs a penalty of -1 point, and unanswered items receive 0 points (total maximum raw score: 750 points). Discipline-specific weighting factors (Zarayeb) are applied to calculate composite rank-scores for each specialty matching track (Prosthodontics, Endodontics, Orthodontics, Periodontics, OMFS, Oral Pathology, Oral Medicine, Pediatric Dentistry, Restorative Dentistry, Oral Radiology, and Dental Public Health).

Time Limit

250 minutes

Passing Score

Competitive scaled ranking with minimum qualifying discipline thresholds

Exam / Certification Fees

Set annually by the Ministry of Health and Medical Education, payable online via sanjeshp.ir during the official registration window

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

12%

Prosthodontics (پروتزهای دندانی)

Fixed partial denture design, tooth preparation biomechanics, complete denture borders and retention, RPD clasp assemblies and major connectors, articulation and facebow transfer, occlusion concepts, and maxillofacial prostheses.

Oral & Maxillofacial Pathology (آسیب‌شناسی دهان، فک و صورت)

Histopathologic classification and biological behavior of odontogenic cysts (dentigerous, KCOT/OKC), benign and malignant odontogenic tumors (ameloblastoma, CEOT), salivary neoplasms (pleomorphic adenoma, mucoepidermoid carcinoma), and mucosal dysplasias.

Orthodontics & Dentofacial Orthopedics (ارتودانتیکس)

Prenatal and postnatal craniofacial growth theories, cephalometric landmarks and sagittal/vertical analysis, orthodontic biomechanics (center of resistance, center of rotation, couple forces), anchorage control, and functional and fixed appliances.

Endodontics & Pulpal Biology (اندودانتیکس)

Dental pulp histology and innervation, periapical inflammatory dynamics, diagnostic pulp sensibility tests, root canal morphologic variations, nickel-titanium instrumentation kinematics, sodium hypochlorite and EDTA irrigation, and endodontic microsurgery.

Periodontics & Implant Surgery (پریودانتیکس)

Microbial biofilms and red-complex pathogens, host-immune destructive cascades, staging and grading under the 2017 AAP/EFP classification, osseous resective and regenerative surgery, connective tissue grafting, and dental implant osseointegration.

Oral Medicine, Diagnosis & Pharmacotherapy (بیماری‌های دهان و فک و صورت)

Differential diagnosis of autoimmune bullous diseases (pemphigus vulgaris, mucous membrane pemphigoid), oral lichen planus, recurrent aphthae, orofacial pain and trigeminal neuralgia, and dental management of cardiovascular, renal, and diabetic patients.

Oral & Maxillofacial Surgery & Trauma (جراحی دهان، فک و صورت)

Anatomy of local anesthetic nerve blocks, toxic doses and systemic management of local anesthetics, surgical extraction of impacted third molars, fascial space infection pathways (Ludwig's angina), Le Fort midface fractures, and mandibular trauma.

Restorative & Esthetic Dentistry (دندانپزشکی ترمیمی و زیبایی)

Total-etch versus self-etch dentin bonding systems, hybrid layer degradation and MMP inhibition, composite polymerization shrinkage and C-factor management, modern cavity preparation geometry, and in-office and home vital bleaching mechanisms.

Pediatric Dentistry (دندانپزشکی کودکان)

Chronology of human primary and permanent dentition, Frankl behavior rating scale and nitrous oxide sedation, indirect and direct pulp therapy, pulpotomy agents (formocresol, ferric sulfate, MTA), stainless steel crowns, and band-and-loop space maintainers.

Oral & Maxillofacial Radiology (رادیولوژی دهان، فک و صورت)

X-ray production, filtration, collimation, and dosimetry; radiation protection principles (ALADA/ALARA); bisecting-angle versus paralleling intraoral techniques; panoramic artifacts; CBCT field-of-view selection; and radiolucent/radiopaque lesion interpretation.

Dental Materials & Applied Science (مواد دندانی)

Rheology and setting reactions of addition silicone (polyvinyl siloxane) and polyether impressions; chemistry and release of glass ionomer and resin cements; phase transformation toughening in yttria-stabilized tetragonal zirconia; and dental casting metallurgy.

Community Oral Health & Epidemiology (سلامت دهان و دندانپزشکی اجتماعی)

Oral health indices (DMFT, DMFS, CPI), preventive epidemiology, water fluoridation optimal levels and fluorosis risks, school sealant initiatives, and the Iranian Behvarz primary health care network for oral health promotion.

Professional & Medical English (زبان تخصصی دندانپزشکی)

Scientific dental nomenclature, Greco-Latin prefixes and etymological roots, interpretation of randomized clinical trials and abstracts from international dental journals.

Preparing for the Iran Dental Residency Entrance Exam Exam

What You Need to Know

Passing score: Competitive scaled ranking with minimum qualifying discipline thresholds
Assessment: Administered annually across national academic dental hubs under the authority of Sanjesh Pezeshki and the Council for Dental and Specialized Education, the examination features 250 multiple-choice questions administered in a 250-minute testing block. Scoring employs an exact negative marking scheme: each correct answer yields +3 points, each incorrect answer incurs a penalty of -1 point, and unanswered items receive 0 points (total maximum raw score: 750 points). Discipline-specific weighting factors (Zarayeb) are applied to calculate composite rank-scores for each specialty matching track (Prosthodontics, Endodontics, Orthodontics, Periodontics, OMFS, Oral Pathology, Oral Medicine, Pediatric Dentistry, Restorative Dentistry, Oral Radiology, and Dental Public Health).
Time limit: 250 minutes
Exam / certification fees: Set annually by the Ministry of Health and Medical Education, payable online via sanjeshp.ir during the official registration window Official sources

Using Our Practice Resources

Work through all 100 available questions
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Iran Dental Residency Entrance Exam: Suggested Study Strategy

1Master the high-yield disciplines first: Prosthodontics accounts for ~12% of the examination, and along with Endodontics, Orthodontics, and Periodontics, forms the clinical core that heavily drives total score and sub-group rankings.

2Calibrate your guessing strategy around the +3 / -1 negative marking rule: never guess blindly. Only attempt an item if you can confidently eliminate at least two distractors, as three wrong guesses cancel out an entire correct question.

3Integrate reference textbook editions mandated by the Secretariat of the Council for Dental and Specialized Education, focusing on high-frequency tables, clinical classifications, and radiographic diagnostic criteria.

4Review Dental Materials and Applied Science thoroughly (~6%): questions on impression elastomers, zirconia transformation toughening, and resin-dentin hybridization mechanisms represent high-yield scoring opportunities that distinguish top-percentile ranks.

5Use this independent English-language adaptation by OpenExamPrep for diagnostic self-evaluation of conceptual weaknesses, pairing your practice with official Persian past exam booklets (Daftarcheh Azmoon) released by Sanjesh Pezeshki.

Frequently Asked Questions

What is the Iranian Dental Residency Entrance Exam (Dastyari Dandanpezeshki)?

The National Entrance Examination for Dental Specialty Residency (آزمون پذیرش دستیار تخصصی دندانپزشکی) is the mandatory centralized competitive examination administered by Sanjesh Pezeshki. It allocates all postgraduate residency seats across Iranian dental faculties in specialties such as Prosthodontics, Endodontics, Orthodontics, Periodontics, Oral and Maxillofacial Surgery, Oral Pathology, Oral Medicine, Pediatric Dentistry, Restorative Dentistry, Oral Radiology, and Dental Public Health.

What is the examination structure, question count, and duration?

The official examination consists of 250 four-option multiple-choice questions administered in a single continuous session lasting 250 minutes (exactly one minute per question). Candidates mark their responses on optical answer sheets scored electronically by Sanjesh Pezeshki.

Does the exam employ negative marking, and how is it calculated?

Yes. The Iranian Dental Residency Entrance Exam enforces strict negative marking: each correct answer awards +3 raw marks, each incorrect answer deducts -1 raw mark, and unanswered questions yield 0 marks. Because 3 incorrect answers completely cancel out 1 correct answer, random guessing is penalized and strategic omission of uncertain questions is essential.

What are discipline-specific coefficients (Zarayeb) and how do they affect matching?

Different postgraduate specialty programs assign different coefficient multipliers (Zarayeb) to each of the 13 blueprint disciplines. For instance, a candidate aiming for an Orthodontics residency will have their raw Orthodontics score multiplied by a higher factor than their Oral Surgery score, whereas an applicant targeting Oral and Maxillofacial Surgery has higher multipliers applied to Surgery and Pathology. Sanjesh Pezeshki publishes sub-ranks (Rotbeh dar Zir-Gorooh) based on these weighted totals.

What are the eligibility requirements to sit for the examination?

Candidates must hold a recognized Doctor of Dental Surgery (DDS) or Doctor of Dental Medicine (DMD) degree approved by the Ministry of Health and Medical Education. Depending on their graduation cohort and academic standing, applicants must either have completed mandatory statutory military and public health service obligations (Tarh-e Khedmat-e Pezeshkan va Pirapezeshkan) or qualify under statutory exemptions for top-ranking undergraduate students (Estedad-haye Derakhshan).

Is this OpenExamPrep question bank an official Sanjesh Pezeshki translation or past paper?

No. This question bank is an independent English-language multiple-choice study adaptation authored by OpenExamPrep to support concept mastery, self-assessment, and clinical reasoning across all blueprint subjects. The official examination is administered in Persian by Sanjesh Pezeshki, and this practice resource is neither an official translation nor affiliated with or endorsed by any governmental agency.