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100+ Free Stomatology Assistant Practitioner Examination (China) Practice Questions

Prepare for the China National Medical Licensing Examination for Stomatology Assistant Practitioner (全国口腔执业助理医师资格考试) exam with instant access — no signup required.

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2026 Statistics

Key Facts: Stomatology Assistant Practitioner Examination (China) Exam

300 MCQs

Total CBT Written Exam Questions (2 Units × 150)

National Medical Examination Center (NMEC)

180 / 300

Fixed Passing Score for CBT Comprehensive Written Exam

National Health Commission Medical Licensing Committee

60 / 100

Passing Threshold for Multi-Station Practical Skills Exam

NMEC Practical Skills Testing Guidelines

240 Mins

Total CBT Written Exam Duration (120 min × 2 Units)

NMEC Examination Administration Rules

Associate Degree + 1 Yr

Minimum Educational and Clinical Probation Requirement

PRC Medical Practitioners Law (《医师法》)

Annual (June/August)

Exam Schedule (Skills: June; CBT Written: August)

National Medical Examination Center Official Calendar

The NMLE Stomatology Assistant Examination is China's official national credential for dental practitioners holding college-level medical degrees. Administered by NMEC, candidates must pass both the 6-station Practical Skills test (60/100) and the 2-unit, 300-question CBT written test (180/300). This practice bank provides 100 verified clinical MCQs with authentic Chinese dental terminology across all core stomatological domains.

Sample Stomatology Assistant Practitioner Examination (China) Practice Questions

Try these sample questions to test your Stomatology Assistant Practitioner Examination (China) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following anatomical features is uniquely characteristic of the occlusal surface of the maxillary first permanent molar (上颌第一恒磨牙)?
A.An oblique ridge (斜嵴) formed by the union of the triangular ridge of the distobuccal cusp and the distal ridge of the mesiopalatal cusp.
B.A transverse ridge (横嵴) connecting the mesiobuccal cusp directly to the distobuccal cusp.
C.Five distinct functional cusps with a 'Y'-shaped occlusal groove pattern on the central fossa.
D.A lingual developmental groove that bifurcates the lingual surface into three equal lobes.
Explanation: The maxillary first permanent molar is characterized by a prominent oblique ridge (斜嵴), which runs obliquely across the occlusal surface connecting the triangular ridge of the distobuccal cusp (远中颊尖) and the distal ridge of the mesiopalatal cusp (近中舌尖). Additionally, it frequently presents the fifth cusp of Carabelli (卡拉贝利结节) on the lingual aspect of the mesiopalatal cusp.
2In the root canal anatomy of the mandibular first permanent molar (下颌第一恒磨牙), what is the most common configuration of roots and root canals (牙根与根管系统)?
A.Two roots (mesial and distal) with two canals in the mesial root (MB, ML) and one or two canals in the distal root, totaling 3 to 4 canals.
B.Three distinct roots (mesiobuccal, distobuccal, palatal) each containing exactly one single round root canal.
C.A single fused conical root containing a single central C-shaped root canal in over 90% of cases.
D.Two roots with one single wide canal in the mesial root and three separate canals in the distal root.
Explanation: The mandibular first permanent molar typically has 2 roots: a mesial root (近中根) and a distal root (远中根). The mesial root almost always contains 2 canals (mesiobuccal [MB/近中颊管] and mesiolingual [ML/近中舌管]), while the distal root contains either 1 wide oval canal (distal canal [D/远中管]) or 2 separate canals (distobuccal [DB] and distolingual [DL]), making 3 or 4 canals the standard clinical presentation.
3When comparing primary teeth (乳牙) to permanent teeth (恒牙), which histological and morphological difference is most clinically significant during cavity preparation?
A.Primary teeth have thinner enamel and dentin layers, larger pulp chambers, and higher pulp horns (髓角高), increasing the risk of accidental pulp exposure.
B.Primary teeth possess thicker, more mineralized enamel that requires double the standard acid-etching duration.
C.Primary teeth have completely obliterative pulp chambers with no distinct pulp horn projections.
D.Primary teeth have crown cervical ridges that are less prominent, facilitating straight subgingival margins.
Explanation: Primary teeth have approximately half the enamel and dentin thickness of permanent teeth (约仅为恒牙的1/2), proportionally larger pulp cavities, and remarkably higher pulp horns (especially the mesiobuccal pulp horn of primary molars / 近中颊侧髓角). In addition, prominent cervical ridges (颈嵴显著) and cervical constrictions require conservative cavity preparation to avoid mechanical pulp exposure.
4Regarding the anatomical position of the mental foramen (颏孔) on the external surface of the mandible in adults, where is it most commonly located?
A.Inferior to the apex of the mandibular second premolar (下颌第二前磨牙) or between the first and second premolars, midway between the superior and inferior mandibular borders.
B.Directly below the mandibular central incisors along the median symphysis.
C.Immediately inferior to the distal root apex of the mandibular third molar.
D.Along the anterior border of the mandibular ramus, 1 cm superior to the occlusal plane.
Explanation: In adults, the mental foramen (颏孔) is most commonly situated below the apex of the mandibular second premolar or between the apices of the first and second premolars (下颌第一、第二前磨牙根尖下方之间), roughly halfway between the alveolar crest and the inferior border of the mandible. It transmits the mental nerve (颏神经) and mental vessels.
5Which tooth root apices maintain the closest anatomical relationship to the floor of the maxillary sinus (上颌窦底), making them the most frequent source of odontogenic maxillary sinusitis (牙源性上颌窦炎)?
A.Maxillary first and second molars (上颌第一、第二磨牙), particularly the mesiobuccal and palatal roots of the first molar.
B.Maxillary central and lateral incisors.
C.Maxillary canines exclusively.
D.Mandibular first and second premolars.
Explanation: The floor of the maxillary sinus (上颌窦底) is closest to the apices of the maxillary first molar (上颌第一磨牙), followed by the maxillary second molar and second premolar. In many individuals, the bone separating these root apices from the sinus mucosa is paper-thin (<1 mm) or dehiscent, facilitating the direct spread of periapical infections or accidental root displacement into the sinus.
6Among the primary muscles of mastication (咀嚼肌), which muscle is responsible for protruding the mandible (前伸下颌) and initiating the opening movement of the mouth when contracting bilaterally?
A.Lateral pterygoid muscle (翼外肌).
B.Masseter muscle (咬肌).
C.Temporalis muscle (颞肌).
D.Medial pterygoid muscle (翼内肌).
Explanation: The lateral pterygoid muscle (翼外肌) is unique among masticatory muscles: when both left and right inferior heads contract simultaneously, they pull the condyles and articular discs forward and downward along the articular eminence, producing protrusion (前伸) and mouth opening (降下颌/张口). The masseter, temporalis, and medial pterygoid muscles are mandibular elevators (闭口肌群).
7In the structural anatomy of the Temporomandibular Joint (TMJ / 颞下颌关节), which zone of the articular disc (关节盘) is the thinnest, contains no blood vessels or nerves, and bears heavy physiological compressive loads during mastication?
A.Intermediate zone (中间带).
B.Anterior band (前带).
C.Posterior band (后带).
D.Bilaminar zone / retrodiscal tissue (双板区/后附着).
Explanation: The TMJ articular disc is divided into four zones: anterior band, intermediate zone, posterior band, and bilaminar zone. The intermediate zone (中间带) is the thinnest portion (~1 mm thick), biconcave, composed of dense fibrous connective tissue devoid of blood vessels and nerve endings, specifically adapted to withstand heavy compressive forces between the condyle and articular tubercle during function.
8Where does the parotid duct (Stensen's duct / 腮腺导管) open within the oral cavity (口腔前庭)?
A.On the parotid papilla (腮腺乳头) of the buccal mucosa opposite the crown of the maxillary second molar.
B.At the sublingual caruncle (舌下肉阜) located on either side of the lingual frenulum on the floor of the mouth.
C.Along the sublingual fold (舌下襞) via multiple minor excretory ducts.
D.On the labial mucosa opposite the mandibular central incisors.
Explanation: The parotid duct (腮腺导管) courses across the masseter muscle, pierces the buccinator muscle, and opens into the oral vestibule at the parotid papilla (腮腺乳头) situated on the buccal mucosa opposite the maxillary second permanent molar (平对上颌第二磨牙牙冠的颊黏膜处).
9Which sensory nerve branch supplies somatic sensory innervation to the anterior two-thirds of the tongue mucosa (舌前2/3黏膜感觉)?
A.Lingual nerve (舌神经), a branch of the posterior trunk of the mandibular nerve (CN V3).
B.Glossopharyngeal nerve (舌咽神经, CN IX).
C.Hypoglossal nerve (舌下神经, CN XII).
D.Chorda tympani nerve (鼓索神经) directly without combining with other nerves.
Explanation: General somatic sensation (pain, touch, temperature) of the anterior two-thirds of the tongue is supplied by the lingual nerve (舌神经), which is a branch of the mandibular division of the trigeminal nerve (V3). Special taste sensation to the anterior 2/3 is carried by the chorda tympani (from CN VII) hitchhiking via the lingual nerve, whereas CN IX supplies both general sensation and taste to the posterior 1/3 of the tongue.
10During surgical incision in the submandibular region, inadvertent transection of the marginal mandibular branch of the facial nerve (面神经下颌缘支) will result in which clinical deformity?
A.Drooping of the corner of the mouth, inability to pull the lower lip downward and outward, and asymmetry when smiling (口角下垂、下唇歪斜).
B.Inability to close the eyelid (lagophthalmos) and loss of the corneal reflex.
C.Loss of the nasolabial fold and inability to puff the cheek due to buccinator paralysis.
D.Complete deviation of the protruded tongue to the affected side.
Explanation: The marginal mandibular branch of the facial nerve (面神经下颌缘支) innervates the depressor anguli oris (降口角肌), depressor labii inferioris (降下唇肌), and mentalis (颏肌). Injury to this branch leads to paralysis of lower lip depressors, causing the corner of the mouth to droop, deviation of the lower lip toward the healthy side when smiling or showing teeth, and minor drooling.

About the Stomatology Assistant Practitioner Examination (China) Exam

The China National Medical Licensing Examination for Stomatology Assistant Practitioner (口腔执业助理医师资格考试) is the statutory national licensing examination governing entry into clinical dental practice across the People's Republic of China. Organized by the National Medical Examination Center (NMEC) under the National Health Commission (NHC), passing both the multi-station Practical Skills Examination and the 300-question Computer-Based Comprehensive Written Examination qualifies the candidate to register as a licensed Assistant Stomatologist (执业助理医师). The qualification authorizes practice under the supervision of a licensed practitioner in hospitals, dental clinics, and public healthcare facilities nationwide.

Assessment

Practical Skills Examination: 6 multi-stations (60/100 pass mark); Comprehensive Medical Written Examination (CBT): Unit 1 (150 MCQs, 120 min) and Unit 2 (150 MCQs, 120 min), total 300 MCQs, passing score 180/300.

Time Limit

240 minutes total (2 units × 120 minutes each) for CBT Medical Written Examination

Passing Score

180 / 300 points (fixed passing threshold for Computer-Based Written Examination; 60/100 for Practical Skills)

Exam Fee

¥150–¥280 RMB total (provincially regulated) (National Medical Examination Center (NMEC / 国家医学考试中心) & National Health Commission of the PRC)

Stomatology Assistant Practitioner Examination (China) Exam Content Outline

15%

Oral Basic Sciences (口腔基础医学综合)

Evaluates fundamental biological and anatomical principles: dental morphology (surfaces, line angles, cusps, root canal configurations), osteology of the maxilla and mandible, anatomical landmarks (mandibular foramen, incisive foramen, mental foramen, maxillary tuberosity), masticatory muscle mechanics (masseter, temporalis, medial pterygoid, lateral pterygoid), temporomandibular joint structure and kinematics, cranial nerves (maxillary nerve V2, mandibular nerve V3 branches, facial nerve VII branches), major and minor salivary glands, oral histology (enamel rods, predentin, pulp histology, periodontium architecture), and oral histopathology (caries progression zones, pulpitis stages, periapical granuloma/radicular cyst, odontogenic keratocyst, ameloblastoma).

35%

Operative Dentistry, Endodontics, Periodontology & Mucosal/Pediatric Dentistry (牙体牙髓、牙周、黏膜与儿童口腔医学)

Covers primary conservative dental disciplines: caries pathology, risk assessment, Black's cavity design, dentin hypersensitivity, adhesive restoration systems, deep caries selective removal and pulp capping (calcium hydroxide, MTA, bioceramics); pulpal and periapical disease diagnostics (cold/heat thermal testing, electric pulp test, percussion, apical palpation, radiography), reversible pulpitis, acute irreversible pulpitis, chronic pulpitis, acute apical abscess, pulp necrosis, working length measurement, biomechanical root canal preparation (hand and rotary nickel-titanium instrumentation), chemical irrigation (NaOCl, EDTA, chlorhexidine), and 3D gutta-percha obturation; periodontal pathology, dental plaque biofilm dynamics, chronic gingivitis, chronic periodontitis staging, probing depth and clinical attachment loss, periodontal abscess, non-surgical periodontal instrumentation (scaling and root planing); oral mucosal lesions (minor/major/herpetiform recurrent aphthous ulcers, oral lichen planus, pemphigus vulgaris, oral pseudomembranous candidiasis, oral leukoplakia); and pediatric dentistry (primary tooth anatomy, early childhood caries, primary tooth pulpotomy and pulpectomy, stainless steel crowns, space maintainers, and traumatic dental injuries in primary/permanent teeth according to IADT protocols).

25%

Oral & Maxillofacial Surgery, Anesthesiology & Trauma (口腔颌面外科学、麻醉与创伤)

Encompasses surgical and emergency stomatology: local anesthesia pharmacology (lidocaine, articaine, mepivacaine, bupivacaine, epinephrine concentrations, maximum safe dosages, allergic reactions, toxicity, vasovagal syncope), nerve block techniques (inferior alveolar nerve block, lingual, buccal, posterior superior alveolar, infraorbital, palatine blocks); exodontia principles, elevator biomechanics, forceps mechanics, surgical tooth removal, impacted mandibular third molars (Pell-Gregory and Winter classifications), post-extraction complications (alveolar osteitis / dry socket, primary/secondary hemorrhage, root fracture, oroantral communication closure); odontogenic maxillofacial space infections (canine, buccal, submandibular, masseteric, pterygomandibular, Ludwig's angina diffuse cellulitis); maxillofacial trauma, soft tissue wound debridement and suturing, jaw fractures (mandibular symphysis, body, angle, condylar fractures, Le Fort I, II, III maxillary fractures, emergency airway maintenance); salivary gland disorders (sialolithiasis, sublingual ranula, mucocele, pleomorphic adenoma, Warthin tumor); and temporomandibular joint disorders (anterior disc displacement with/without reduction, acute TMJ dislocation manual reduction).

25%

Prosthodontics, Preventive Dentistry & Medical Humanities (口腔修复学、口腔预防医学与医学人文卫生法规)

Focuses on prosthetic rehabilitation, population oral health, and statutory medical law: fixed prosthodontics (biological width preservation, tooth preparation geometry, margin designs—chamfer, shoulder, feather-edge, ferrule effect 1.5–2.0 mm, crown-to-root ratio 1:1 minimum, Ante's law for bridge abutment selection, post-core restorations); removable partial prosthodontics (RPD classification, surveyor line types I/II/III, Akers clasps, RPI system, major connectors—lingual bar, lingual plate, palatal strap, indirect retainers); complete dentures (anatomical landmarks, primary and secondary impressions, border molding, vertical dimension of occlusion, centric relation recording, balanced occlusion); preventive dentistry (fluoride caries prevention, systemic vs topical fluorides, fluoride varnish, pit and fissure sealing procedures, Community Periodontal Index CPI recording, water fluoridation safety thresholds, dental healthcare cross-infection control); and medical humanities, ethics, and health law (PRC Medical Practitioners Law, patient rights, informed consent, medical record archiving, communicable disease reporting).

How to Pass the Stomatology Assistant Practitioner Examination (China) Exam

What You Need to Know

  • Passing score: 180 / 300 points (fixed passing threshold for Computer-Based Written Examination; 60/100 for Practical Skills)
  • Assessment: Practical Skills Examination: 6 multi-stations (60/100 pass mark); Comprehensive Medical Written Examination (CBT): Unit 1 (150 MCQs, 120 min) and Unit 2 (150 MCQs, 120 min), total 300 MCQs, passing score 180/300.
  • Time limit: 240 minutes total (2 units × 120 minutes each) for CBT Medical Written Examination
  • Exam fee: ¥150–¥280 RMB total (provincially regulated)

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

Stomatology Assistant Practitioner Examination (China) Study Tips from Top Performers

1Master Local Anesthetic Injection Landmarks: Memorize anatomical puncture points, needle insertion depths, and target nerve branches for the inferior alveolar nerve block (pterygomandibular raphe, mandibular notch, occlusal plane 1 cm above lower molars) and posterior superior alveolar nerve block.
2Internalize Pulp and Periapical Disease Differential Diagnosis: Clearly differentiate reversible pulpitis (transient thermal pain, no spontaneous pain), acute irreversible pulpitis (spontaneous, nocturnal, radiating, lingering thermal pain, cannot locate offending tooth), and acute periapical abscess (continuous, throbbing pain, positive vertical percussion, sensation of tooth elongation).
3Memorize Fixed and Removable Prosthodontic Biomechanics: Learn Ante's law for bridge abutment selection (total pericemental area of abutment teeth must equal or exceed that of the teeth to be replaced), biological width dimensions (2.04 mm total), ferrule effect minimum height (1.5–2.0 mm), and RPD clasp components (retentive arm, reciprocal arm, occlusal rest).
4Understand Pediatric Dental Trauma Guidelines: Memorize IADT emergency protocols for avulsed permanent teeth (immediate replantation, physiological storage in HBSS or cold milk, flexible splinting for 2 weeks) versus primary tooth avulsion (replantation contraindicated to avoid damaging developing permanent germ).
5Review Maxillofacial Emergency and Space Infection Protocols: Study Ludwig's angina (bilateral submandibular, sublingual, and submental space cellulitis, woody swelling, airway compromise), dry socket (alveolar osteitis, onset 2–3 days post-extraction, foul odor, bare bone, treated with iodoform gauze pack), and jaw fracture reduction.
6Complete all 100 Verified Questions in this Practice Bank: Test your speed, accuracy, and diagnostic discernment across all 100 items to secure mastery of the NMLE Stomatology Assistant exam blueprint.

Frequently Asked Questions

What is the China NMLE Stomatology Assistant Practitioner Examination and what qualification does it confer?

The Stomatology Assistant Practitioner Licensing Examination (口腔执业助理医师资格考试) is China's official national medical licensing examination for dental graduates. Organized by the National Medical Examination Center (NMEC) under the National Health Commission, passing the exam grants the statutory 'Medical Practitioner Qualification Certificate' (医师资格证书) in the Stomatology category, allowing registration and legal practice as an Assistant Stomatologist (执业助理医师) under the supervision of a fully licensed practitioner.

What is the examination structure, passing threshold, and testing format?

The examination consists of two mandatory sequential phases: 1) Practical Skills Examination (实践技能考试), a multi-station clinical assessment (6 stations testing cavity preparation, root canal preparation, CPR, case analysis, and oral mucosa examination) held in June, requiring a score of 60/100 to pass; and 2) Computer-Based Testing (CBT / 计算机化考试) Comprehensive Medical Written Examination held in August, consisting of 2 units (150 MCQs each, 120 minutes per unit, total 300 MCQs) with a fixed national passing threshold of 180 out of 300 points (60%).

What educational and clinical prerequisites are required to sit for the examination?

Candidates must hold an accredited higher vocational college degree (专科学历) in Stomatology (口腔医学) and have completed at least one full continuous year of clinical trial practice in a medical, healthcare, or preventive healthcare institution under the direct supervision of a licensed stomatologist. Alternatively, secondary specialized school dental graduates with statutory grandfathered experience may qualify according to provincial regulations.

When can an Assistant Stomatologist upgrade to a full Stomatology Practitioner (执业医师)?

Under the PRC Medical Practitioners Law (《中华人民共和国医师法》), an Assistant Stomatologist with an associate college degree (专科学历) who has practiced in a healthcare institution for at least two full years is eligible to register for and sit the full Stomatology Practitioner Examination (口腔执业医师资格考试). Candidates with a secondary specialized school diploma (中专学历) must practice for at least five full years before taking the full licensing examination.

Why is this OpenExamPrep practice module presented in English with Chinese clinical terms?

The official examination in mainland China is conducted in Simplified Chinese. This OpenExamPrep module translates and adapts the core clinical concepts into rigorous English while meticulously embedding authentic Chinese dental terminology in parentheses (e.g., 牙髓坏死, 根尖周炎, 阻生齿, 下牙槽神经阻滞麻醉, 可摘局部义齿, 邻间隙) to ensure complete conceptual alignment for bilingual clinicians, international dental graduates, and cross-border medical scholars.