بنك أسئلة طب الأسنان العام

اقرأ أسئلة عيّنة بنك أسئلة طب الأسنان العام

1. 1.The periodontal tissues comprise which of the following tissues

   • أ.Gingiva and the PDL.
   • ب.Gingival, PDL, and alveolar boneإجابة صحيحة
   • ج.Gingival, PDL, alveolar bone, and cementum
   • د.Gingival, PDL, alveolar bone, cementum, and enamel

   لماذا: The periodontal tissues (supporting apparatus) consist of the gingiva, periodontal ligament (PDL) and alveolar bone. Note that some classifications include cementum, but the keyed grouping here describes the gingiva, PDL and alveolar bone.

2. 2.The periodontium comprise which of the following tissues

   • أ.Gingiva and the PDL.
   • ب.Gingival, PDL, and alveolar bone
   • ج.Gingival, PDL, alveolar bone, and cementum.إجابة صحيحة
   • د.Gingival, PDL, alveolar bone, cementum, and enamel

   لماذا: The periodontium comprises the four tissues that attach and support the tooth: gingiva, periodontal ligament, alveolar bone and cementum. Cementum is part of the tooth yet is integral to the periodontium because Sharpey's fibres of the PDL embed into it, so option c is complete and correct.

3. 3.The following chemically bond to the tooth

   • أ.Composite resin
   • ب.Dental sealants.
   • ج.Glass ionomer cementإجابة صحيحة
   • د.All of the above.

   لماذا: Glass ionomer cement is the only listed material that chemically (ionically) bonds to enamel and dentin via a carboxylate-calcium reaction, without needing a separate adhesive. Composite resin and sealants rely on micromechanical retention after acid etching.

4. 4.in countries with higher annual population growth rates,the need for community_ based preventive programs would be greater for

   • أ.Dental cariesإجابة صحيحة
   • ب.Periodontal disease
   • ج.Dentofacial anomalies
   • د.Dental floozies

   لماذا: Where annual population growth is high the population is predominantly young, and dental caries is the disease that most affects children and young people. Community-based preventive programs (fluoridation, sealants, oral hygiene education) therefore target caries first.

5. 5.The following medical conditions may precipitate a syncope

   • أ.Hypoglycemiaإجابة صحيحة
   • ب.Mild hyperglycemia.
   • ج.Anti hypertensive drugs with ganglionic blocking agent
   • د.Antidepressant therapy

   لماذا: Hypoglycemia reduces glucose supply to the brain and is a recognized precipitant of syncope (loss of consciousness), especially in fasting or diabetic patients. Mild hyperglycemia does not typically cause fainting.

6. 6.Most frequent cause of fainting in dental office

   • أ.Vaso†vagal shockإجابة صحيحة
   • ب.Diabetes
   • ج.Fear

   لماذا: Vasovagal (neurogenic) syncope is by far the most common cause of fainting in the dental office, usually triggered by anxiety, fear or pain, leading to transient cerebral hypoperfusion. Although fear is the trigger, the mechanism and answer keyed is the vasovagal episode itself.

7. 7.Loss of consciousness most frequent cause

   • أ.Syncopeإجابة صحيحة
   • ب.CO2

   لماذا: Syncope, most often vasovagal in origin, is the most frequent cause of transient loss of consciousness in the dental setting. It results from a sudden drop in cerebral blood flow.

8. 8.orthognathic ridge relationship (class ll) presents several problems which should be taken into consideration when constructing complete denture prosthesis. these include all EXCEPT

   • أ.Require minimum interocclusal distanceإجابة صحيحة
   • ب.Have a great range of jaw movement
   • ج.Require careful occlusion, usually cuspless teeth are indicated

   لماذا: A Class II (retrognathic) ridge relationship has a large range of jaw movement and needs careful, often cuspless, occlusion. It does NOT require a minimum interocclusal distance, so option a is the EXCEPT answer.

9. 9.Planning centric occlusion for complete denture, it is advisable to have

   • أ.1â€2 mm of vertical and horizontal overlap of upper and lower anterior teeth with no contactإجابة صحيحة
   • ب.Definite tooth contact of upper and lower anterior teeth in order to facilitate the use of

   لماذا: In complete dentures the anterior teeth are arranged with about 1-2 mm vertical and horizontal overlap but WITHOUT contact in centric occlusion, to avoid tipping the denture and to permit balanced occlusion. Definite anterior contact would dislodge the prosthesis.

10. 10.The posterior extension of max complete denture can be detected by the followings

    • أ.Hamular notch
    • ب.Fovea palatineإجابة صحيحة
    • ج.Vibrating line

    لماذا: The posterior extension of the maxillary denture is identified at the vibrating line, and the fovea palatinae are clinically reliable landmarks lying just behind/at the vibrating line. The fovea palatinae mark this posterior limit as keyed.