Free Practice Questions for Saudi Board Endodontics

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Sample Saudi Board Endodontics Practice Questions

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1A 56-year-old patient with poorly controlled type 2 diabetes mellitus (HbA1c 9.2%) presents for nonsurgical root canal therapy on tooth #19 exhibiting symptomatic apical periodontitis. According to the endodontic literature regarding glycemic control and treatment outcomes, what is the most significant clinical consequence of the patient's systemic condition?

A.Accelerated root canal calcification leading to rapid obliteration of the apical third

B.Reduced periapical bone healing and more persistent post-treatment apical periodontitis

C.Spontaneous development of internal inflammatory root resorption in adjacent vital teeth

D.Immediate allergic-type hypersensitivity to standard epoxy resin-based endodontic sealers

Explanation: Extensive clinical literature (including studies by Fouad and Burleson, and Marotta et al.) demonstrates that poorly controlled diabetes mellitus significantly impairs periradicular bone healing and compromises immune defense mechanisms. Patients with elevated HbA1c exhibit prolonged inflammatory responses, altered osteoblastic activity, and a higher rate of persistent periapical radiolucencies following endodontic treatment compared to normoglycemic controls.

2A 62-year-old male with a history of coronary artery disease is referred for evaluation of multiple periapical radiolucencies. What is the established biological link between chronic apical periodontitis and systemic cardiovascular pathosis?

A.Pro-inflammatory cytokines (IL-1, IL-6, TNF-alpha) raise serum CRP and impair endothelial function

B.Endodontic pathogens directly colonize the aortic arch and produce severe mechanical stenosis without systemic inflammatory involvement

C.Apical lesions trigger systemic hypocalcemia, precipitating spontaneous coronary arterial spasms

D.Periapical granulomas downregulate systemic leukocyte adhesion molecules, causing widespread vascular aneurysms

Explanation: Chronic apical periodontitis acts as a localized reservoir of microbial antigens and endotoxins that stimulate continuous host release of pro-inflammatory cytokines (IL-1, IL-6, TNF-alpha) into the systemic circulation. These mediators upregulate hepatic synthesis of C-reactive protein (CRP) and contribute to endothelial inflammation, accelerated atherosclerosis, and increased cardiovascular morbidity as demonstrated in epidemiological investigations.

3A patient with stage 5 chronic kidney disease on long-term maintenance hemodialysis presents for endodontic evaluation. What characteristic radiographic finding in the gnathic bones and pulp spaces is frequently associated with secondary hyperparathyroidism in these patients?

A.Total absence of cementum with extensive cervical root resorption across all quadrants

B.Generalized hypercementosis and universal open root apices in fully erupted mature teeth

C.Dense sclerotic alveolar bone with complete loss of mandibular nutrient canals

D.Loss of lamina dura, ground-glass trabeculae and pulp chamber calcifications

Explanation: Secondary hyperparathyroidism in end-stage renal disease results from hyperphosphatemia and impaired calcitriol synthesis, driving elevated parathyroid hormone secretion. This causes osteoclastic resorption of alveolar bone leading to generalized loss of lamina dura, ground-glass appearance, brown tumors (osteoclastomas), and dystrophic calcification of the dental pulp chambers and canals.

4A 68-year-old female receiving monthly intravenous zoledronic acid infusions for metastatic breast cancer presents with pulpal necrosis on tooth #30. Why is nonsurgical endodontic therapy strongly preferred over dental extraction in this patient?

A.Nonsurgical endodontic instrumentation stimulates new periosteal cortical bone deposition, reversing the malignancy

B.Bisphosphonates chemically bond to gutta-percha, creating an impervious hermetic apical seal

C.It avoids osseous and mucosal disruption, greatly reducing the risk of MRONJ

D.Dental extraction is contraindicated only because local anesthetics are completely ineffective in patients taking nitrogenous bisphosphonates

Explanation: In patients receiving intravenous antiresorptive agents such as zoledronic acid, dentoalveolar surgery involving bone trauma (such as tooth extraction) is the primary initiating trigger for medication-related osteonecrosis of the jaw (MRONJ). Conservative nonsurgical endodontic treatment that avoids soft tissue reflection and confines instrumentation strictly within the canal space carries a negligible risk of MRONJ and is the therapy of choice.

5According to epidemiological investigations examining tobacco use and endodontic outcomes (such as Krall et al.), how does chronic cigarette smoking influence endodontic prognosis and tooth retention?

A.Smokers have enhanced periapical revascularization due to nicotine-induced vasodilation

B.Smoking alters the oral microbiome such that obligate anaerobes are completely eradicated

C.A higher incidence of post-treatment apical periodontitis and about twice the extraction risk

D.Smoking causes accelerated dentin bridge formation following direct pulp capping procedures

Explanation: Cigarette smoking exerts pronounced vasoconstrictive effects via nicotine, impairs neutrophil chemotaxis and phagocytosis, and suppresses antibody production. Longitudinal cohort studies, such as Krall et al., demonstrate that cigarette smokers have a higher prevalence of periapical radiolucencies, delayed bony healing, and roughly twice the risk of tooth loss following root canal therapy compared to non-smokers.

6A 21-year-old male with sickle cell anemia presents with sudden unprovoked severe pain in tooth #24. Clinical examination reveals an intact crown without caries, restorations, or trauma, yet the tooth is completely non-responsive to cold and electric pulp testing. What pathophysiological mechanism explains this presentation?

A.Hypercalcemic crisis precipitating acute calcific metamorphosis of the pulp

B.Sickling of erythrocytes in pulpal microvessels causing aseptic ischemic pulp infarction

C.Autoimmune destruction of pulpal odontoblasts driven by rheumatoid factor

D.Direct bacterial invasion of the pulp via the bloodstream during a sickle cell pain episode

Explanation: In patients with sickle cell hemoglobinopathies (HbSS), deoxygenation induces polymerization of hemoglobin S, leading to erythrocyte sickling and microvascular vaso-occlusion. The dental pulp is a low-compliance environment with terminal microcirculation; vaso-occlusive episodes can occlude pulpal arterioles and venules, producing aseptic ischemic infarction and pulp necrosis in clinically intact, non-carious teeth.

7A 45-year-old patient with severe rheumatoid arthritis has been managed on the biologic TNF-alpha inhibitor adalimumab for three years. How does biological anti-TNF therapy influence the radiographic and clinical presentation of apical periodontitis?

A.It suppresses osteoclast activity, giving smaller lesions while masking inflammatory signs

B.It completely eliminates all Gram-negative anaerobic bacteria from the apical root canal anatomy

C.It causes rapid enlargement of periapical lesions by stimulating RANKL expression in cementoblasts

D.It transforms apical granulomas into malignant osteosarcomas within three months of therapy

Explanation: TNF-alpha is a key driver of osteoclastogenesis and inflammatory bone resorption in periapical lesions. Therapeutic blockade with TNF inhibitors such as adalimumab blunts systemic and local inflammatory responses, which can mask acute pain symptoms and diminish osteoclastic bone destruction, frequently manifesting as smaller radiolucent lesions despite ongoing intraradicular microbial infection.

8When performing endodontic treatment on a patient with stage 1 essential hypertension (blood pressure 135/85 mmHg) well controlled on an ACE inhibitor, what is the guideline-recommended limit for epinephrine administration in local anesthetic solutions?

A.Zero epinephrine; vasoconstrictors are strictly contraindicated in all hypertensive patients

B.Up to 0.04 mg of epinephrine (equivalent to approximately two cartridges of 1:100,000 epinephrine)

C.Up to 0.2 mg of epinephrine (equivalent to approximately eleven cartridges of 1:100,000 epinephrine)

D.One single cartridge of 1:20,000 levonordefrin only, as epinephrine is entirely banned

Explanation: According to established cardiovascular and dental guidelines (AHA/ACC), patients with cardiovascular disease and controlled hypertension can safely receive up to 0.04 mg of epinephrine per appointment, which corresponds to two cartridges of local anesthetic containing 1:100,000 epinephrine (or four cartridges of 1:200,000). This provides necessary depth and duration of anesthesia while avoiding adverse hemodynamic spikes.

9In the landmark Toronto Study (Friedman et al., de Chevigny et al.) evaluating long-term outcomes of initial nonsurgical root canal therapy, what single pre-operative clinical variable was identified as the most influential determinant of periapical healing?

A.Pre-operative presence of an apical radiolucency (apical periodontitis)

B.Patient chronological age greater than 60 years

C.Tooth position in the arch (maxillary versus mandibular molar)

D.Type of rotary nickel-titanium instrumentation system utilized during cleaning and shaping

Explanation: The Toronto Study established that the pre-operative presence of an apical radiolucency is the single most critical prognostic factor determining periradicular healing. Teeth treated without pre-operative apical periodontitis achieved a success rate of 93-95%, whereas teeth presenting with pre-existing apical lesions demonstrated healed rates of approximately 82-86%.

10In the classic outcome study by Sjögren et al. (1990) evaluating root canal obturation length and quality in teeth with pre-operative apical periodontitis, which obturation apical endpoint demonstrated the highest rate of periapical healing?

A.Extrusion of gutta-percha 2 mm beyond the radiographic apex (overfilling)

B.Terminating 3 to 4 mm short of the radiographic apex (gross underfilling)

C.Obturation terminating 0 to 1 mm short of the radiographic apex (flush fill)

D.Obturation ending exactly 5 mm short of the apex to preserve apical cementum

Explanation: Sjögren et al. (1990) demonstrated that in teeth with pre-operative apical periodontitis, obturation ending 0 to 1 mm short of the radiographic apex yielded the highest success rate (86% healed). Overfilling beyond the apex dropped success to 76%, while underfilling more than 2 mm short of the apex resulted in a success rate of only 68% due to uninstrumented, infected apical canal space.

About the Saudi Board Endodontics Exam

Independent English-language MCQ study adaptation by OpenExamPrep. Independent practice resource by OpenExamPrep for the Saudi Board Final Written Examination in Endodontics. Coverage follows the 13 sections of the official SCFHS blueprint: endodontic relations to other dental specialties and systemic disease, outcome of endodontic treatment, surgical endodontics, pain control and emergencies, endodontic diagnosis and radiology, cleaning and shaping and obturation, nonsurgical retreatment and mishaps, pulpal reactions to caries and dental procedures together with rhinosinusitis of endodontic origin, microbiology of endodontic infections and the pathobiology of apical periodontitis, dental traumatic injuries, regenerative endodontics and vital pulp therapy, classic literature, and the medically compromised patient. This bank is an independent study aid for the written paper and does not simulate the separate clinical/OSCE examination required for final board certification. OpenExamPrep is not affiliated with or endorsed by the Saudi Commission for Health Specialties (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.

Endodontic Relations to Different Dental Specialties and Relationship of Systemic Diseases and Endodontics

Interaction between endodontics and other dental disciplines, and the two-way relationship between apical periodontitis and systemic disease.

Outcome of Endodontic Treatment

Prognostic factors, success and failure criteria, outcome scoring systems and long-term tooth survival.

Surgical Endodontics

Microsurgical flap design, root-end resection and preparation, retrofilling materials and guided tissue regeneration.

10%

Pain Control, Flare Up and Emergency

Local anesthesia and its failure, supplemental techniques, analgesic regimens, flare-up risk and emergency management.

Endodontic Diagnosis, Radiology

Sensibility and vitality testing, AAE diagnostic terminology, periapical radiography and CBCT selection criteria.

Cleaning & Shaping and Obturation of Root Canal System

Canal anatomy and configuration, working length determination, instrumentation hazards, irrigant chemistry and obturation.

Nonsurgical Retreatment and Mishaps

Gutta-percha and post removal, ledges, perforations, separated instruments and sodium hypochlorite accidents.

Pulpal Reactions to Caries and Dental Procedures, and Rhinosinusitis and Endodontic Disease

Dentin and pulp defence responses to caries, cutting, bleaching and restorative procedures, and maxillary sinusitis of endodontic origin.

Microbiology of Endodontic Infections and Pathobiology of Apical Periodontitis

Primary and persistent canal flora, biofilm biology, virulence factors and the host immune mechanisms of periapical bone loss.

12%

Endodontics Dental Traumatic Injuries

Luxation injuries, avulsion, crown and root fractures, resorption patterns and IADT management protocols.

Regenerative Endodontics and Vital Pulp Therapy

Pulp capping, partial and full pulpotomy, revascularization protocols and the biomaterials used in each.

Classic literature

Foundational endodontic studies and the conclusions that shaped current biological and clinical concepts.

11%

Medically Compromised

Systemic disease, pharmacology, antibiotic prophylaxis and perioperative management of the medically complex patient.

Preparing for the Saudi Board Endodontics 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

Using Our Practice Resources

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Saudi Board Endodontics: Suggested Study Strategy

1Review the classic literature on apical periodontitis, microbiology, and healing kinematics (Kakehashi, Siqueira, Nair, Ricucci).

2Focus heavily on the IADT traumatology guidelines, especially replantation protocols, splinting durations, and follow-up intervals.

3Master the distinction between pulpal/periapical diagnostic terms defined by the American Association of Endodontists (AAE) consensus.

4Understand local anesthesia failure mechanisms in hot teeth and evidence-based supplemental injection strategies (intraosseous, PDL).

Frequently Asked Questions

What is the format of the Saudi Board Endodontics Final Written Examination?

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 Endodontics Final Written Examination?

The passing standard is set at 70%. If the overall pass rate among candidates falls below 70%, the passing score is adjusted downward one mark at a time until reaching a 70% candidate pass rate, with an absolute floor of 65%.

Does this question bank simulate the clinical OSCE component?

This bank is an independent English-language MCQ study adaptation for the written examination. It does not simulate or replace the separate mandatory final clinical/practical assessment. Consult the specialty clinical blueprint for its station formats and any structured oral or OSCE components.

Who administers the Saudi Board Endodontics certification?

The examination and specialty certification are administered by the Saudi Commission for Health Specialties (SCFHS). OpenExamPrep is an independent educational platform and is not affiliated with or endorsed by SCFHS.

Free Practice Questions for Saudi Board Endodontics

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