Doctor of Dental Surgery MCQ Flashcards
7 cards from real DDS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Doctor of Dental Surgery MCQ flashcards as text
Which microorganism is considered the primary etiological agent in the initiation of dental caries?
Answer: Streptococcus mutans
Streptococcus mutans is the principal organism initiating dental caries due to its high acidogenic and aciduric properties and ability to produce glucan for biofilm adherence.
Which radiographic view is best for evaluating the condylar head and the temporomandibular joint space?
Answer: Transcranial radiograph
The transcranial (lateral oblique) projection provides a useful view of the lateral aspect of the condylar head and the joint space.
During tooth preparation for a full cast crown, the occlusal reduction for a posterior tooth should generally be:
Answer: 1.5–2.0 mm
Adequate occlusal reduction of 1.5–2.0 mm is required for posterior full cast crowns to provide sufficient metal thickness and strength.
A patient with poorly controlled type 2 diabetes is more susceptible to periodontitis primarily because of:
Answer: Impaired neutrophil function and advanced glycation end-products
Hyperglycemia impairs neutrophil chemotaxis and phagocytosis and promotes formation of AGEs, which upregulate inflammatory cytokines and damage periodontal tissues.
Which suture material is preferred for intraoral wounds because it dissolves without removal?
Answer: Polyglycolic acid (Dexon)
Resorbable sutures like polyglycolic acid (Dexon) or polyglactin (Vicryl) are preferred intraorally because patients do not need to return for removal.
The landmark 'pterygomandibular raphe' serves as a guide for which injection technique?
Answer: Inferior alveolar nerve block
The pterygomandibular raphe is the buccal landmark lateral to which the needle is directed for the inferior alveolar nerve block.
Which type of bone graft material contains living cells capable of differentiation into osteoblasts?
Answer: Autograft
Autografts (patient's own bone) contain viable osteogenic cells, osteoinductive factors, and an osteoconductive scaffold, making them the gold standard for bone regeneration.