Free Practice Questions for Saudi Board Orthodontics

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Key Facts: Saudi Board Orthodontics Exam

200-250

Single-best-answer MCQs across two written papers

SCFHS Orthodontics Final Exam Blueprint

70%

Standard passing score (lowered to minimum 65% if pass rate under 70%)

SCFHS Examination Regulations

Part II

Final written certification exam preceding the clinical OSCE and oral exam

SCFHS Orthodontics Curriculum

Independent

OpenExamPrep study aid; not affiliated with or endorsed by SCFHS

OpenExamPrep Disclosures

Official weighted blueprint sections

SCFHS Orthodontics final written blueprint 24–27 v.2

Saudi Board Final Written Examination - Orthodontics and Dentofacial Orthopedics (SCFHS). Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint. The standard pass mark is 70%; when the initial pass rate is below 70%, SCFHS lowers the score one mark at a time toward a 70% pass rate or a 65% score, whichever comes first. A separate final clinical examination follows the written examination.

Sample Saudi Board Orthodontics Practice Questions

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

1According to Melvin Moss's Functional Matrix Hypothesis, what serves as the primary determinant of skeletal growth and morphogenesis in the craniofacial complex?

A.Intrinsic genetic programming within periosteal and sutural osteogenic cells

B.Epigenetic growth pacemakers located exclusively within the cartilaginous synchondroses

C.Function and volumetric expansion of non-skeletal tissues, organs, and functioning spaces

D.Direct biomechanical stimulation transmitted solely through masticatory muscle attachments

Explanation: Melvin Moss proposed in the Functional Matrix Hypothesis that bone and cartilage lack intrinsic growth control; rather, their growth is secondary, compensatory, and mechanically driven by the functional demands and volumetric expansion of associated soft tissues, organs, and patent spaces (the functional matrix, comprising capsular and periosteal matrices). For instance, calvarial expansion occurs in response to the growing brain volume (capsular matrix), and mandibular ramus development responds to the masseter and pterygoid muscles (periosteal matrix).

2According to Scammon's curves of systemic growth, how does the postnatal growth trajectory of the human mandible compare to that of the maxilla?

A.The mandible follows the neural curve, completing nearly all its growth before the maxilla

B.The maxilla grows later than the mandible because it is driven exclusively by genital hormonal surges

C.Both the maxilla and mandible follow the lymphoid tissue curve, showing marked involution after puberty

D.The mandible follows the somatic (general) curve more closely than the maxilla and completes growth later

Explanation: Scammon described four primary growth curves: neural, lymphoid, general (somatic), and genital. The maxilla, situated closer to the cranial base and brain, follows a growth trajectory closer to the neural curve and reaches adult dimensions earlier than the mandible. The mandible, positioned further away from the cranial base, follows the general (somatic) body growth curve more closely, demonstrating a distinct adolescent growth spurt and completing growth later than the maxilla.

3During the postnatal development of the cranial base, which synchondrosis remains cartilaginously active the longest, typically ossifying in late adolescence?

A.Intersphenoid synchondrosis

B.Spheno-ethmoidal synchondrosis

C.Spheno-occipital synchondrosis

D.Mid-palatal synchondrosis

Explanation: The spheno-occipital synchondrosis is the principal growth center of the cranial base during childhood and adolescence. It remains active throughout pubertal growth, typically undergoing bony fusion (synostosis) between 15 and 18 years of age (often slightly earlier in females than males). Its prolonged growth plays a key role in separating the midface from the posterior cranial base and temporal fossa.

4According to Donald Enlow's principles of facial growth, what osseous remodeling pattern allows the mandibular ramus to relocate posteriorly while maintaining the patency of the pharyngeal airway?

A.Bone resorption on the posterior border of the ramus and bone deposition on the anterior border

B.Resorption along the inferior mandibular border with endochondral ossification across the coronoid process

C.Uniform bone deposition along both the anterior and posterior borders accompanied by lateral expansion

D.Bone deposition on the posterior border of the ramus with coordinated resorption on the anterior border

Explanation: According to Enlow's 'V' principle and remodeling concepts, the mandibular ramus relocates posteriorly and superiorly through progressive bone deposition on its posterior border and simultaneous bone resorption along its anterior border. This remodeling lengthens the mandibular body, provides eruption space for posterior permanent molars, and relocates the ramus backward to accommodate the expanding pharyngeal airway.

5A 12-year-old male presents with a skeletal Class II malocclusion. A lateral cephalometric radiograph evaluated by the Cervical Vertebral Maturation (CVM) method demonstrates distinct concavities on the inferior borders of C2 and C3, while the inferior border of C4 is flat. The bodies of C3 and C4 are trapezoid-shaped. Which CVM stage is this patient in, and what is its clinical significance?

A.CVS 1; the peak in mandibular growth is at least two years away

B.CVS 2; the peak in mandibular growth is expected within one to two years

C.CVS 3; the peak in mandibular growth velocity is imminent or occurring

D.CVS 5; the peak in mandibular growth has ended, and skeletal modification is no longer feasible

Explanation: According to Baccetti et al., Cervical Vertebral Maturation Stage 3 (CS3) is characterized by concavities on the inferior borders of both C2 and C3, while the inferior border of C4 remains flat; both C3 and C4 vertebral bodies remain trapezoidal in shape. CS3 represents the acceleration phase of pubertal craniofacial growth, indicating that the peak in mandibular growth velocity is imminent or actively occurring within the subsequent year, making it the optimal window to initiate functional appliance therapy.

6What does prospective clinical evidence (such as the North Carolina and Florida randomized clinical trials) indicate regarding two-phase versus single-phase treatment for skeletal Class II malocclusion?

A.Two-phase treatment initiated in early mixed dentition results in significantly greater final mandibular length than single-phase treatment

B.Two-phase treatment achieves superior long-term soft tissue profiles and eliminates mandibular incisor proclination

C.Early functional appliance treatment permanently prevents the need for future orthodontic extractions or orthognathic surgery in all patients

D.Single-phase treatment during the pubertal growth spurt produces comparable skeletal and occlusal outcomes in less overall treatment time

Explanation: Major prospective randomized clinical trials (UNC, Florida, and UK multicenter trials) demonstrated that two-phase treatment initiated in the early mixed dentition (Phase 1 functional/orthopedic followed by Phase 2 comprehensive fixed appliances) does not result in significantly greater final mandibular length or a more favorable skeletal outcome compared to single-phase comprehensive treatment initiated during the adolescent pubertal growth spurt. However, early Phase 1 treatment can reduce the incidence of incisal trauma and improve psychosocial well-being in selected patients.

7Which of the following is considered a primary dentoalveolar adverse side effect of both fixed (e.g., Herbst) and removable (e.g., Twin Block) Class II functional appliances?

A.Retroclination and extrusion of the mandibular incisors

B.Proclination and intrusion of the maxillary incisors

C.Proclination of mandibular incisors and retroclination of maxillary incisors

D.Mesial tipping of the maxillary molars with severe anterior deep bite deepening

Explanation: Both fixed and removable functional appliances posture the mandible forward, generating reciprocal forces: a distally directed force on the maxillary dentition (leading to maxillary incisor retroclination and headgear-like molar restriction) and a mesially directed force on the mandibular dentition (leading to mandibular incisor proclination). This dentoalveolar compensation partially masks the skeletal correction and must be managed using acrylic capping, negative torque brackets, or skeletal anchorage.

8A 10-year-old female presents with severe maxillary skeletal protrusion, an increased lower facial height, and an open bite tendency. Which extraoral appliance design is most appropriate to restrict maxillary forward growth without worsening the vertical dimension?

A.Cervical-pull headgear attached to the maxillary first molars

B.Reverse-pull protraction facemask with elastics directed from the chin cup

C.Straight-pull headgear adjusted with outer bows bent down below the occlusal plane

D.High-pull headgear with its line of action above the maxillary center of resistance

Explanation: High-pull headgear delivers a superior and distal force vector. When the force vector passes through or above the center of resistance of the maxilla (and upper molar), it restricts forward maxillary skeletal growth while intruding the maxillary molars or preventing their eruption. This prevents backward/downward mandibular rotation, making it the headgear of choice in hyperdivergent, long-face Class II patients.

9In the orthopedic treatment of a skeletal Class III malocclusion using a Petit-type reverse-pull facemask, what is the typical biomechanical effect on the maxilla and mandible?

A.Anterior maxillary translation with clockwise mandibular rotation

B.Pure distalization of the maxilla with forward and upward auto-rotation of the mandible

C.Posterior rotation of the maxilla around nasion with strict vertical intrusion of the lower incisors

D.Direct endochondral arrest of condylar growth without any soft tissue profile modification

Explanation: Facemask therapy delivers protraction forces (typically 350–500 g per side) to the maxilla. Because the elastics originate from hooks near the canines/premolars below the center of resistance of the maxilla, the maxilla moves forward and tips upward anteriorly (counter-clockwise rotation). Concurrently, the reciprocal force applied to the chin cup redirects mandibular growth downward and backward, rotating the mandible clockwise, which increases lower face height and facilitates rapid correction of the anterior crossbite.

10How does Bone-Anchored Maxillary Protraction (BAMP, De Clerck protocol) using temporary miniplates differ fundamentally from conventional tooth-borne facemask therapy in growing Class III patients?

A.BAMP transmits force through the periodontal ligament, causing pronounced maxillary incisor proclination and molar extrusion

B.BAMP requires concurrent extraction of mandibular premolars to facilitate mechanical anchorage

C.BAMP can only be utilized after complete ossification of the midpalatal suture in late adulthood

D.Orthopedic force is applied directly to bone via miniplates, avoiding dental tipping

Explanation: The De Clerck BAMP protocol utilizes four titanium miniplates: two placed at the infrazygomatic crests of the maxilla and two placed in the parasymphyseal region of the mandible. By applying intermaxillary Class III elastics directly between bone-anchored miniplates, orthopedic traction is transferred directly to the circummaxillary sutures and condylar region without loading the teeth, thereby preventing maxillary incisor proclination, lower incisor retroclination, and undesirable clockwise rotation of the mandible.

About the Saudi Board Orthodontics Exam

Independent English-language MCQ study adaptation by OpenExamPrep. The Saudi Board Final Written Examination in Orthodontics is the certifying exit examination administered by the Saudi Commission for Health Specialties (SCFHS) for senior orthodontic residents. Coverage here follows the ten sections of the official SCFHS blueprint: growth and development, orthodontic diagnosis and treatment planning, growth modification, treatment modalities, retention and stability, comprehensive treatment in adolescents and preadolescents, adult orthodontics, clinical orthodontics, dentofacial deformity, and biomechanics and contemporary orthodontic appliances. This bank is an independent study aid for the written paper and does not simulate the separate clinical examination required for final board certification. OpenExamPrep provides independent practice questions covering these curriculum topics; they are not official SCFHS examination items and OpenExamPrep is not affiliated with or endorsed by SCFHS.

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

Assessment

Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.

Time Limit

Not published by SCFHS

Passing Score

70% (lowered to minimum 65% if pass rate under 70%)

Exam / Certification Fees

Not published by SCFHS

Exam sponsor website

Reported exam pass rate: Not published by SCFHS. SCFHS publishes no candidate pass rate. The blueprint instead sets the passing score at 70% and, if fewer than 70% of candidates pass before final approval, lowers that score one mark at a time until a 70% pass rate is reached or the score reaches 65%, whichever comes first; it is never lowered below 65%. 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.

Growth and Development

Craniofacial growth theories, growth curves, cranial base and remodeling patterns, and skeletal maturity assessment.

10%

Orthodontic Diagnosis and Treatment Planning

Cephalometric and model analyses, tooth-size and space analyses, soft tissue and smile assessment, and treatment-planning limits.

10%

Growth Modification

Headgear, functional appliances, facemask and chin cup therapy, expansion and bone-anchored protraction in growing patients.

17%

Treatment Modalities

Extraction versus non-extraction choices, anchorage and skeletal anchorage, aligners, appliance prescriptions, surgical and interdisciplinary options.

Retention and Stability

Periodontal and gingival fibre reorganization, retainer types, long-term post-retention evidence and relapse-prone corrections.

12%

Comprehensive Treatment in Adolescents and Preadolescent

Mixed-dentition space analysis and management, interceptive correction, serial extraction, space maintenance and eruption problems.

10%

Adult Orthodontics

Adults without growth: periodontal and restorative interfaces, implant site preparation, forced eruption, molar uprighting, surgical decompensation, accelerated techniques.

12%

Clinical Orthodontics

Chairside execution: wire bends, appliance activation schedules, elastics and their side effects, transposition, retainer complications and clinical problem solving.

Dentofacial Deformity

Orthognathic nerve risk and stability hierarchy, cleft alveolar grafting, nasoalveolar molding and the growth consequences of cleft repair.

14%

Biomechanics and Contemporary Orthodontic Appliance

Centres of resistance and rotation, moments and couples, friction and binding, spring and loop design, wire metallurgy and the biology of tooth movement.

Preparing for the Saudi Board Orthodontics Exam

What You Need to Know

Passing score: 70% (lowered to minimum 65% if pass rate under 70%)
Assessment: Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.
Time limit: Not published by SCFHS
Exam / certification fees: Not published by SCFHS Official sources

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Saudi Board Orthodontics: Suggested Study Strategy

1Dedicate significant study time to Comprehensive Mechanotherapy (20%), Biomechanics (15%), and Diagnosis & Treatment Planning (15%), which together represent half of the exam weight.

2Thoroughly understand moment-to-force (M/F) ratios and how varying the center of rotation changes the nature of tooth movement (tipping, controlled tipping, bodily translation, and root movement).

3Review the biological timeline of growth: peak pubertal growth spurt (CVM stages CS3 to CS4) and its implications for Class II functional appliance therapy versus Class III protraction.

4Understand surgical cephalometric prediction tracings (VTO), presurgical orthodontic decompensation objectives, and common relapse vectors following maxillary and mandibular osteotomies.

5Master the biological remodeling of periodontal and gingival fiber networks, particularly the persistence of supra-alveolar transseptal fibers and the rationale for circumferential supracrestal fibrotomy.

6Know alloy properties: compare the low load-deflection rate and superelasticity of NiTi with the formability and moderate stiffness of beta-titanium (TMA) and the rigidity of stainless steel for space closure.

Frequently Asked Questions

What is the official name and purpose of the Saudi Board Orthodontics written examination?

The official credential exam is the Saudi Board Final Written Examination - Orthodontics and Dentofacial Orthopedics (SCFHS). Administered by the Saudi Commission for Health Specialties (SCFHS), it certifies that senior residents have achieved advanced didactic knowledge required for specialist orthodontic practice.

What is the structure and question count of the official SCFHS written exam?

Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.

What is the passing score for the Saudi Board Final Written Examination?

The standard pass mark is 70%. In accordance with SCFHS executive regulations, if fewer than 70% of candidates pass, the pass mark is lowered by one point at a time toward a 70% passing proportion, but it will never be lowered below a minimum floor of 65%.

What subject areas are covered on the Saudi Board Orthodontics written blueprint?

The blueprint covers 9 weighted domains: Growth and Development (5%), Growth Modification (10%), Diagnosis and Treatment Planning (15%), Biomechanics and Appliance Design (15%), Early and Interceptive Treatment (10%), Comprehensive Orthodontic Mechanotherapy (20%), Orthognathic Surgery and Cleft Palate (10%), Retention, Relapse, and Stability (10%), and Orthodontic Materials and Biology (5%).

What are the prerequisite requirements to take this examination?

Candidates must be actively enrolled in or have successfully completed an accredited SCFHS Orthodontics and Dentofacial Orthopedics residency program, have passed the Saudi Board Part I examination, and have fulfilled all clinical logbook and training requirements verified through Mumaris+.

What is the official exam fee?

SCFHS does not publish a standardized flat fee on public blueprints; exam fees are confirmed through the SCFHS Mumaris+ training portal during the formal examination registration and scheduling period.

Does passing this written exam grant board certification?

No. The written exam is Part II (written component) of final certification. Candidates who pass the written exam must subsequently take and pass the final clinical examination, which includes an Objective Structured Clinical Examination (OSCE) and a structured oral case defense.

Are these practice questions endorsed or sponsored by SCFHS?

No. OpenExamPrep provides independent educational practice materials developed to help residents prepare for their specialty board examinations. OpenExamPrep is an independent educational provider and is not affiliated with, authorized, or endorsed by the Saudi Commission for Health Specialties (SCFHS).

Free Practice Questions for Saudi Board Orthodontics

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