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100+ Free CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Practice Questions

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Key Facts: CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Exam

100 Qs

Practice Bank

OpenExamPrep Practice Bank

R16 800

Exam Fee

CMSA Fee Schedule

50%

Passing Score

CMSA Exam Regulations

CMSA

Exam Body

College of Maxillofacial and Oral Surgeons of SA

The CMSA Dip Oral Surg(SA) assesses advanced clinical competence in minor oral surgery. This practice bank provides 100 clinically accurate practice MCQs covering impactions, surgical anatomy, infection spread, LA protocols, cyst management, and surgical complications.

Sample CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Practice Questions

Try these sample questions to test your CMSA Diploma in Oral Surgery Dip Oral Surg(SA) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A 24-year-old male presents with a mesioangularly impacted mandibular third molar. According to Winter's classification, which angulation measurement defines a mesioangular impaction?
A.The long axis of the third molar is inclined mesially towards the second molar at an angle between 11 and 70 degrees
B.The long axis of the third molar is perpendicular to the second molar at 90 degrees
C.The long axis of the third molar is inclined distally away from the second molar
D.The long axis of the third molar is parallel to the long axis of the second molar
Explanation: Winter's classification categorizes mandibular third molar impactions based on the inclination of the third molar's long axis relative to the second molar. A mesioangular impaction is defined by a mesial tilt between 11 and 70 degrees towards the second molar, making it the most common and generally easiest type of impacted third molar to remove in the mandible.
2Which nerve is at highest risk of direct iatrogenic injury during a distal wedge procedure or incision made distal to the mandibular second molar?
A.Lingual nerve
B.Inferior alveolar nerve
C.Mylohyoid nerve
D.Buccal nerve
Explanation: The lingual nerve lies in close proximity to the lingual cortical plate and periosteum distal to the mandibular second molar in up to 15-20% of cases. Making incisions on the lingual aspect or extending retromolar incisions too far lingually creates a severe risk of direct transaction or neuropraxia of the lingual nerve.
3Which local anaesthetic solution has the highest lipid solubility and rapid plasma clearance due to an ester linkage in its thiophene ring?
A.Articaine 4% with 1:100 000 epinephrine
B.Lignocaine 2% with 1:80 000 epinephrine
C.Bupivacaine 0.5% with 1:200 000 epinephrine
D.Mepivacaine 3% plain
Explanation: Articaine is unique among amide local anaesthetics because it contains a thiophene ring instead of a benzene ring, as well as an ester side group. This ester group allows rapid hydrolysis by plasma esterases (half-life ~20 minutes), resulting in lower systemic toxicity despite its 4% concentration.
4On day 4 following a surgical extraction of tooth 38, a 30-year-old female presents with severe, radiating neuralgiform pain, halitosis, and exposed bare bone in the extraction socket. What is the primary pathophysiology of this condition?
A.Premature fibrinolysis of the intra-alveolar blood clot by plasmin
B.Acute bacterial osteomyelitis of the mandibular body
C.Direct bacterial invasion of the inferior alveolar nerve canal
D.Retained root fragment with acute apical periodontitis
Explanation: Alveolar osteitis (dry socket) is caused by premature disintegration or breakdown of the post-extraction intra-alveolar blood clot. Tissue and bacterial plasminogens activate plasmin, which lyses the fibrin framework, exposing denuded alveolar bone and sensory nerve endings.
5Which odontogenic cyst characteristically arises from the reduced enamel epithelium surrounding the crown of an unerupted or impacted tooth?
A.Dentigerous cyst
B.Radicular cyst
C.Odontogenic keratocyst
D.Nasopalatine duct cyst
Explanation: A dentigerous (follicular) cyst develops by fluid accumulation between the reduced enamel epithelium and the enamel crown of an unerupted tooth. Radiographically, it presents as a well-circumscribed radiolucency attached at the cementoenamel junction (CEJ) of the impacted tooth.
6A patient presents with a 1.5 cm fluctuant swelling in the left submandibular region secondary to a non-restorable lower molar infection. What is the fundamental surgical principle when performing an extraoral incision and drainage?
A.Incline the incision parallel to Langer's skin cleavage lines at least 2 cm below the inferior border of the mandible
B.Make the skin incision directly over the mandibular border perpendicular to the facial artery
C.Incline the incision parallel to the ramus of the mandible superior to the lower border
D.Dissect sharply with a scalpel down to bone through the masseter muscle
Explanation: Extraoral submandibular incision and drainage must be performed at least 1.5 to 2 cm below the inferior border of the mandible (or in a natural skin crease) to prevent damage to the marginal mandibular branch of the facial nerve. Hilton's blunt dissection technique is then used once through skin and platysma.
7What is the maximum recommended dose of Lignocaine (Lidocaine) plain (without epinephrine) for a healthy 70 kg adult patient?
A.4.4 mg/kg up to a absolute maximum of 300 mg
B.7.0 mg/kg up to an absolute maximum of 500 mg
C.2.0 mg/kg up to an absolute maximum of 150 mg
D.10.0 mg/kg up to an absolute maximum of 700 mg
Explanation: The maximum safe recommended dose for plain Lignocaine (without vasoconstrictor) is 4.4 mg/kg in adults, not exceeding an absolute maximum of 300 mg. When epinephrine is added, the increased local retention allows the maximum dose to be increased to 7.0 mg/kg (up to 500 mg).
8Which surgical instrument is specifically designed with a triangular or tear-drop shaped blade to elevate tooth roots by acting as a wedge and lever?
A.Cryer elevator
B.Coupland elevator
C.Warwick James straight elevator
D.Periosteal elevator No. 9
Explanation: The Cryer elevator features a sharp triangular blade angled at 90 degrees to the shank. It is used primarily in double-rooted mandibular molars when one root has been removed, inserting the tip into the empty socket to wheel-and-lever out the adjacent remaining root.
9Which fascial space is situated directly between the mylohyoid muscle superiorly/medially and the platysma muscle and deep cervical fascia inferiorly?
A.Submandibular space
B.Sublingual space
C.Submental space
D.Canine space
Explanation: The submandibular space lies inferior to the mylohyoid muscle and superior to the deep layer of cervical fascia. Odontogenic infections originating from lower second and third molars perforate the lingual cortex below the mylohyoid ridge directly into the submandibular space.
10During a routine extraction of an upper first molar, a root tip breaks off and disappears into the maxillary sinus. What is the immediate first diagnostic step?
A.Take a intraoral periapical or cone-beam computed tomography (CBCT) radiograph to confirm the exact location of the root tip
B.Immediately perform a Caldwell-Luc procedure to explore the sinus floor
C.Instill forceful saline irrigation into the socket to flush the root out
D.Suction forcefully with a high-volume surgical tip directly inside the socket
Explanation: When a root tip displaces toward or into the maxillary sinus, radiographic imaging (intraoral periapical or CBCT/panoramic) must be obtained immediately to verify whether the root tip is subperiosteal under the sinus membrane, free within the sinus cavity, or still inside the socket.

About the CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Exam

The Diploma in Oral Surgery Dip Oral Surg(SA) is awarded by the Colleges of Medicine of South Africa to dentists demonstrating advanced competence in minor oral surgery, surgical extractions, odontogenic infections, maxillofacial trauma management, and oral surgical pathology.

Assessment

100 single best answer MCQs across 6 core domains: Surgical Extractions & Impacted Third Molars (25%), Surgical Anatomy & Fascial Spaces (20%), Odontogenic Infections & Management (20%), Local Anaesthesia, Sedation & Pharmacology (15%), Cysts, Tumours & Benign Lesions (10%), and Maxillofacial Trauma & Postoperative Complications (10%).

Time Limit

3 hours (MCQ practice adaptation)

Passing Score

Overall 50% with written subminimum

Exam Fee

R18 950 (College of Maxillofacial and Oral Surgeons of South Africa (Colleges of Medicine of South Africa))

CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Exam Content Outline

25%

Surgical Extractions & Impacted Third Molars

Classification of impactions (Pell & Gregory, Winter), flap design, bone troughing, tooth sectioning, root tip retrieval, and surgical extraction techniques.

20%

Surgical Anatomy & Fascial Spaces

Maxillofacial neurovascular structures, inferior alveolar nerve, lingual nerve, maxillary sinus anatomy, facial submandibular and canine fascial spaces.

20%

Odontogenic Infections & Management

Pathogenesis of odontogenic infections, Ludwig's angina, canine space abscess, surgical drainage principles, antimicrobial stewardship, and airway management.

15%

Local Anaesthesia, Sedation & Pharmacology

Local anaesthetics, vasoconstrictors, nerve block techniques, local anaesthetic systemic toxicity (LAST), conscious sedation protocols, and post-op analgesia.

10%

Cysts, Tumours & Benign Lesions

Radicular cyst, dentigerous cyst, odontogenic keratocyst (OKC), ameloblastoma, biopsy protocols (incisional vs excisional), and marsupialisation vs enucleation.

10%

Maxillofacial Trauma & Postoperative Complications

Mandibular and alveolar fractures, oroantral communication (OAC) repair, alveolar osteitis (dry socket), postoperative haemorrhage, and nerve injury management.

How to Pass the CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Exam

What You Need to Know

  • Passing score: Overall 50% with written subminimum
  • Assessment: 100 single best answer MCQs across 6 core domains: Surgical Extractions & Impacted Third Molars (25%), Surgical Anatomy & Fascial Spaces (20%), Odontogenic Infections & Management (20%), Local Anaesthesia, Sedation & Pharmacology (15%), Cysts, Tumours & Benign Lesions (10%), and Maxillofacial Trauma & Postoperative Complications (10%).
  • Time limit: 3 hours (MCQ practice adaptation)
  • Exam fee: R18 950

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CMSA Diploma in Oral Surgery Dip Oral Surg(SA) Study Tips from Top Performers

1Review mandibular third molar surgical planning, including Winter's lines, Pell & Gregory classification, and proximity to the inferior alveolar nerve on CBCT.
2Master the anatomical boundaries and danger zones of deep fascial spaces of the head and neck, especially the submandibular, retropharyngeal, and Ludwig's angina risk.
3Understand emergency management of local anaesthetic systemic toxicity (LAST) with 20% lipid emulsion and airway stabilisation.

Frequently Asked Questions

What is the assessment format for the CMSA Dip Oral Surg(SA)?

The examination comprises written papers, clinical case presentations, and oral examinations conducted by the College of Maxillofacial and Oral Surgeons of South Africa.

What is the pass mark for the Dip Oral Surg(SA)?

The passing standard is an overall 50% aggregate with a mandatory written subminimum score as set by the CMSA Senate.

What is the examination fee for the Dip Oral Surg(SA)?

The examination fee is R16 800 as listed on the official CMSA fee schedule.