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Exam Review

Key Facts: SCFHS Restorative Dentistry Exam

200

Official MCQ count

SCFHS Restorative Dentistry Blueprint 2024

4 hours

Official exam duration

SCFHS Restorative Dentistry Blueprint 2024

65% / 70%

Pass mark (Registrar / Sr. Registrar)

SCFHS Restorative Dentistry Blueprint 2024

13

Weighted blueprint content domains

SCFHS Restorative Dentistry Blueprint 2024

26%

Combined Operative & Prosthodontics weight

SCFHS Restorative Dentistry Blueprint 2024

The SCFHS Restorative Dentistry classification examination evaluates dentists seeking Registrar or Senior Registrar professional standing in restorative dentistry in Saudi Arabia. Published blueprint specifications mandate 200 MCQs over a 4-hour Prometric testing window with passing scores of 65% for Registrar and 70% for Senior Registrar. The examination covers 13 weighted domains led by Operative Dentistry (13%), Prosthodontics (13%), Endodontics (11%), Cariology (9%), Esthetic Dentistry (8%), and Implants (8%).

Sample SCFHS Restorative Dentistry Practice Questions

Try these sample questions to review concepts for the SCFHS Restorative Dentistry exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which structural protein constitutes the vast majority of the organic matrix of mature human dentin?

A.Type I collagen

B.Type II collagen

C.Type III collagen

D.Type IV collagen

Explanation: Type I collagen accounts for approximately 90% of the organic matrix of mature human dentin, with trace amounts of Type III and Type V collagen. The remaining 10% consists of non-collagenous proteins such as phosphophoryn, dentin sialoprotein, and proteoglycans that regulate mineral deposition.

2According to Brännström's hydrodynamic theory, what is the primary mechanism triggering dentin hypersensitivity?

A.Direct electrical depolarization of unmyelinated C-fibers located in the outer enamel

B.Rapid inward or outward movement of dentinal fluid stimulating mechanoreceptors on A-delta nerve fibers

C.Direct thermal conduction through odontoblastic processes to the central pulpal core

D.Bacterial endotoxins dissolving peritubular dentin and activating autonomic sympathetic receptors

Explanation: Brännström's hydrodynamic theory posits that thermal, osmotic, tactile, or evaporative stimuli cause rapid fluid displacement within patent dentinal tubules. This mechanical fluid movement deforms nerve endings of myelinated A-delta fibers located at the pulp-dentin junction, eliciting sharp, transient pain.

3In response to mild or moderate advancing carious demineralization that does not destroy the original primary odontoblasts, what type of tertiary dentin is formed?

A.Mantle dentin

B.Reparative dentin

C.Reactionary dentin

D.Osteodentin

Explanation: Reactionary dentin is a specific form of tertiary dentin synthesized by surviving, preexisting primary odontoblasts in response to mild-to-moderate metabolic or mechanical irritation. In contrast, reparative dentin is formed by newly differentiated odontoblast-like cells from pulpal progenitor stem cells following the death of primary odontoblasts.

4Which histological and physical characteristic is most typical of physiological or pathological sclerotic dentin?

A.Decreased mineral density and hyper-permeable open tubule lumens

B.Progressive peritubular dentin deposition leading to partial or complete obliteration of tubule lumens

C.High etching responsiveness producing deep resin tag infiltration comparable to young coronal dentin

D.Complete absence of hydroxyapatite crystals within the peritubular and intertubular matrices

Explanation: Sclerotic (translucent) dentin is characterized by progressive apposition of mineral salts (primarily whitlockite and hydroxyapatite) within peritubular dentin, gradually narrowing and obliterating tubule lumens. This reduces hydraulic conductance and dentin permeability, but simultaneously creates an acid-resistant substrate that is difficult to etch and hybridize effectively.

5Which endogenous enzymes embedded in the mineralized dentin matrix are activated by low pH during acid etching and contribute to hybrid layer degradation over time?

A.Lysozymes and myeloperoxidases

B.Alkaline phosphatases and amylases

C.Matrix metalloproteinases (MMPs) and cysteine cathepsins

D.Glucosyltransferases and fructosyltransferases

Explanation: Matrix metalloproteinases (specifically MMP-2, MMP-8, and MMP-9) and cysteine cathepsins are host-derived zinc- and calcium-dependent endopeptidases trapped in the dentin matrix during development. Mild or strong acids expose and activate these pro-enzymes, which then slowly hydrolyze denuded, unprotected collagen fibrils within the hybrid layer, contributing to long-term bond degradation.

6What is the primary role of a silane coupling agent (3-methacryloxypropyltrimethoxysilane) when conditioning etched silicate ceramics for adhesive resin bonding?

A.It selectively dissolves the silica crystals to generate micromechanical retention pits

B.A bifunctional molecule bonding to ceramic silica and copolymerizing with the resin

C.It neutralizes residual hydrofluoric acid to prevent soft tissue toxicity in the mouth

D.It prevents water sorption and hydrolysis by forming an impermeable fluorapatite barrier

Explanation: Silane coupling agents possess a bifunctional chemical structure: an inorganic alkoxy group that undergoes condensation with surface silanol (-Si-OH) groups on etched glass ceramic to form siloxane (Si-O-Si) bonds, and an organofunctional methacrylate group that copolymerizes with resin matrix monomers, creating a strong chemical bridge.

7In direct adhesive restorations, which cavity preparation configuration presents the highest configuration factor (C-factor) and the greatest polymerization shrinkage stress?

A.Class V facial smooth-surface preparation

B.Class II mesio-occluso-distal (MOD) cavity preparation

C.Class IV incisal angle preparation

D.Class I occlusal cavity preparation

Explanation: The configuration factor (C-factor) is the ratio of bonded to unbonded (free) restorative surface areas. A standard Class I occlusal box has 5 bonded walls (mesial, distal, facial, lingual, pulpal) and only 1 unbonded surface (the occlusal opening), yielding a C-factor of 5/1 = 5, which generates the highest internal contraction stress along the adhesive interface.

8What histological pattern is produced on enamel after conditioning with 35% to 37% phosphoric acid for 15 seconds?

A.Selective dissolution of prism cores or peripheries, creating 5 to 50 µm microporosities

B.Complete destruction of the prism architecture, leaving an amorphous protein precipitate layer

C.Selective dissolution of intertubular collagen fibrils without altering calcium content

D.Deposition of a dense fluorapatite passivation coating that resists monomer penetration

Explanation: Phosphoric acid etching (35-37%) preferentially dissolves hydroxyapatite crystals from either enamel prism cores (Silverstone Type 1 pattern) or prism peripheries (Type 2 pattern), creating micro-retentive porosities 5 to 50 µm deep. This increases surface free energy and allows low-viscosity resin monomers to penetrate and form resin microtags.

9Which wavelength spectrum and co-initiator are required for the activation of camphorquinone (CQ) in modern visible-light-cured restorative composites?

A.Ultraviolet light at 280 to 320 nm, paired with a tertiary alcohol co-initiator

B.Blue light at 460 to 470 nm with an aliphatic or tertiary amine co-initiator

C.Infrared light at 780 to 850 nm, paired with a benzoyl peroxide initiator

D.Violet light at 390 to 410 nm, paired with a camphor sulfonate ester

Explanation: Camphorquinone (CQ) is an alpha-dicarbonyl photoinitiator that absorbs visible blue light with a peak absorption spectrum between 468 and 470 nm. Upon photon absorption, CQ transitions to an excited triplet state and abstracts a hydrogen atom from an electron-donating co-initiator (such as DMAEMA or ethyl-4-dimethylaminobenzoate), generating free radicals to initiate chain-growth polymerization.

10What is the primary chemical bonding mechanism of the functional monomer 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) found in high-performance self-etch adhesives?

A.Covalent esterification of glutamic acid residues in dentin collagen without mineral

B.Chelation of zinc ions in dentinal fluid followed by ionic cross-linking of collagen

C.Formation of insoluble MDP-calcium salts arranged in nanolayers on hydroxyapatite

D.Oxidative cleavage of peritubular hydroxyapatite forming an irreversible metal complex

Explanation: The 10-MDP monomer has a polymerizable methacrylate group, a hydrophobic 10-carbon spacer chain, and a hydrophilic dihydrogen phosphate group. The phosphate group chemically interacts with calcium ions in residual hydroxyapatite around collagen fibrils, forming highly stable, insoluble MDP-calcium salts that self-assemble into characteristic 4 nm thick nanolayers, providing superior long-term bond durability.

About the SCFHS Restorative Dentistry Exam

This resource is an independent English-language MCQ study adaptation created by OpenExamPrep for dental practitioners preparing for the Saudi Licensure Examination - Restorative Dentistry classification exam. SCFHS lists 'Restorative Dentistry' on its official Classification Exams directory and links to the 2024 blueprint ('Restorative%20Dentistry%20Blueprint%202024_0.pdf'). The official examination consists of 200 multiple-choice questions administered over 4 hours at Prometric testing centers with passing standards of 65% for Registrar classification and 70% for Senior Registrar classification. The examination assesses 13 distinct clinical areas across basic science, operative dentistry, cariology, esthetic dentistry, endodontics, pain control, prosthodontics, occlusion, implantology, medically compromised patients, periodontal-restorative interrelationships, research and ethics, and patient safety. This examination is a professional classification assessment for dental specialists and is distinct from both the general entry-level Saudi Dental Licensure Examination (SDLE) and the academic Saudi Board Final Written Examination in Restorative Dentistry. OpenExamPrep is an independent educational provider and is not affiliated with, approved by, or endorsed by SCFHS or Prometric.

Exam sponsor: Saudi Commission for Health Specialties (SCFHS), administered through Prometric test centers. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

The official SCFHS Restorative Dentistry blueprint lists a 200-MCQ, 4-hour computer-based examination covering 13 weighted content sections: Basic Science 5%; Operative 13%; Cariology 9%; Esthetic 8%; Endodontics 11%; Oral and Facial Pain and Pain Control 5%; Prosthodontics 13%; Occlusion 7%; Implant 8%; Medically Compromised Patients 5%; Periodontal Restorative Interrelationship 6%; Research and Ethics 5%; and Patient Safety 5%.

Time Limit

4 hours

Passing Score

65% (Registrar) / 70% (Senior Registrar)

Exam / Certification Fees

Not published by SCFHS

Exam sponsor website

Reported exam pass rate: Not published. No official candidate pass-rate data for the Restorative Dentistry classification examination is published by SCFHS. 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.

5%

Basic Science

Dental histology, pulpal biology, dentin-pulp complex defense mechanisms, biomaterials science, and oral microbiology.

13%

Operative Dentistry

Direct composite restorations, dental amalgam, cavity preparations, matrix systems, adhesive bonding protocols, and polymerization shrinkage management.

9%

Cariology

Caries risk assessment (CAMBRA/ICDAS), remineralization, fluoride mechanisms, non-cavitated lesions, and minimally invasive excavation protocols.

8%

Esthetic Dentistry

Color science, shade selection, ceramic veneer design and cementation, direct composite layering, optical properties, and tooth whitening.

11%

Endodontics

Pulpal and periapical pathology, root canal anatomy, instrumentation, irrigation dynamics, obturation, vital pulp therapy, and traumatic dental injuries.

5%

Oral and Facial Pain and Pain Control

Local anesthetic pharmacology, mandibular blocks, supplemental anesthesia techniques, orofacial pain differential diagnosis, and post-operative analgesia.

13%

Prosthodontics

Fixed partial dentures, crown preparation geometries, impression techniques, all-ceramic systems, provisional restorations, and resin cements.

7%

Occlusion

Centric relation, maximum intercuspation, mutually protected occlusion, articulator mounting, facebow transfers, and occlusal interference management.

8%

Implant

Single-tooth and partial edentulism implant restoration, screw- versus cement-retained prostheses, abutment design, platform switching, and impression workflows.

5%

Medically Compromised Patients

Dental management of cardiovascular conditions, diabetes mellitus, bleeding disorders, anticoagulant therapy, and antibiotic prophylaxis guidelines.

6%

Periodontal Restorative Interrelationship

Supracrestal tissue attachment (biological width), margin placement, crown lengthening indications, ferrule effect, and periodontal-restorative harmony.

5%

Research and Ethics

Dental ethics principles (autonomy, beneficence, non-maleficence, justice), informed consent, research design, and evidence-based clinical decision making.

5%

Patient Safety

Infection control, sterilization protocols, rubber dam isolation safety, aspiration prevention, instrument separation protocol, and adverse incident reporting.

Preparing for the SCFHS Restorative Dentistry Exam

What You Need to Know

Passing score: 65% (Registrar) / 70% (Senior Registrar)
Assessment: The official SCFHS Restorative Dentistry blueprint lists a 200-MCQ, 4-hour computer-based examination covering 13 weighted content sections: Basic Science 5%; Operative 13%; Cariology 9%; Esthetic 8%; Endodontics 11%; Oral and Facial Pain and Pain Control 5%; Prosthodontics 13%; Occlusion 7%; Implant 8%; Medically Compromised Patients 5%; Periodontal Restorative Interrelationship 6%; Research and Ethics 5%; and Patient Safety 5%.
Time limit: 4 hours
Exam / certification fees: Not published by SCFHS Official sources

Using Our Practice Resources

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SCFHS Restorative Dentistry: Suggested Study Strategy

1Prioritize Operative Dentistry and Prosthodontics, which together account for 26% of the examination blueprint.

2Master modern adhesive dentistry protocols, including self-etch, total-etch, universal adhesives (10-MDP bonding mechanisms), and immediate dentin sealing.

3Review ceramic materials science thoroughly, focusing on the differences in etching and silanization protocols between silica-based glass ceramics and polycrystalline zirconia.

4Focus on the biological width (supracrestal tissue attachment) concept, ferrule requirements (1.5-2.0 mm), and indications for surgical crown lengthening versus orthodontic extrusion.

5Study pulpal and periapical diagnostic categories and vital pulp therapy indications using modern bioceramic / calcium silicate materials (MTA, Biodentine).

6Understand occlusion principles, including centric relation, mutually protected schemes, semi-adjustable articulator settings, and non-working side interferences.

7Familiarize yourself with medical risk management, especially updated AHA/ADA infective endocarditis antibiotic prophylaxis guidelines and management of patients on direct oral anticoagulants (DOACs).

8Practice clinical vignette scenarios that test diagnostic reasoning, complication management, and material selection under timed conditions.

Frequently Asked Questions

What official examination does sa-scfhs-restorative-dentistry map to?

This file maps sa-scfhs-restorative-dentistry to the official Saudi Licensure Examination - Restorative Dentistry classification exam administered by SCFHS. SCFHS lists Restorative Dentistry on its official Classification Exams directory and links directly to the 2024 blueprint.

Is this exam the same as the general SDLE or the Saudi Board in Restorative Dentistry?

No. The Saudi Dental Licensure Examination (SDLE) is the general entry-level licensing examination for dental interns and general dental practitioners. The Saudi Board Final Written Examination in Restorative Dentistry is an academic residency exit examination. This examination is the sub-specialty professional classification assessment used to classify restorative dentistry specialists (Registrar or Senior Registrar).

How many questions are on the official exam and how long is it?

The official SCFHS Restorative Dentistry Blueprint 2024 specifies 200 multiple-choice questions administered over a 4-hour computer-based testing window at Prometric centers.

What is the passing score for Registrar and Senior Registrar classification?

According to the official SCFHS Restorative Dentistry Blueprint 2024, the passing standard is 65% for Registrar level classification and 70% for Senior Registrar level classification.

What topic sections carry the highest weight on the exam?

The two largest sections are Operative Dentistry (13%) and Prosthodontics (13%), followed by Endodontics (11%), Cariology (9%), Esthetic Dentistry (8%), and Implants (8%). Occlusion represents 7%, Periodontal Restorative Interrelationship 6%, and Basic Science, Oral/Facial Pain, Medically Compromised Patients, Research/Ethics, and Patient Safety each represent 5%.

What are the eligibility requirements for the examination?

Candidates must hold a recognized undergraduate dental degree (BDS/DDS) and qualifying postgraduate credentials (e.g., master's degree, specialist diploma, or structured residency) in restorative dentistry. Candidates apply through the SCFHS Mumaris+ portal and obtain testing authorization before booking a seat via Prometric.

How much does the examination cost?

SCFHS does not publish a fee for this classification exam on the Classification Exams page or in the 2024 blueprint, and the SAR 120 Mumaris+ eligibility service covers the licensure exams SMLE, SDLE, SNLE, SPLE, SLLE, SRCLE and SRTLE rather than classification exams. Confirm the charges that apply to you in Mumaris+ and at Prometric booking.

Can this classification examination be taken online or remotely?

No. The live SCFHS Restorative Dentistry classification examination is administered exclusively at physical Prometric computer-based testing centers under secure in-person proctoring conditions.