Practice questions › BDS / Dentistry › BDS Professional Review: Core Dental Sciences
Endodontics and Periodontology MCQs
BDS Professional Review: Core Dental Sciences · BDS / Dentistry · 27 practice questions
- Irrigation
- Periapical diagnosis
- Pulpitis
- Instruments and obturation
- Periodontitis (2017 AAP/EFP)
- Clinical attachment level
- Plaque and gingivitis
- Furcation and recession
1. A microbiology report from a periodontal pocket sample identifies three anaerobic species strongly associated with severe periodontal destruction, often grouped together due to their co-occurrence in mature subgingival biofilm. Which combination of organisms would this report most likely list?
- APorphyromonas gingivalis, Tannerella forsythia, Treponema denticola
- BAggregatibacter actinomycetemcomitans, Fusobacterium nucleatum, Prevotella intermedia
- CCandida albicans, Staphylococcus aureus, Enterococcus faecalis
- DStreptococcus mutans, Lactobacillus, Actinomyces
Show answer
A. Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola The red complex bacteria strongly associated with periodontal disease severity are Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola.
2. A tooth has 3 mm of gingival recession from the cementoenamel junction and a probing depth of 4 mm measured from the gingival margin. What is the clinical attachment level for this tooth?
- A1 mm
- B3 mm
- C4 mm
- D7 mm
Show answer
D. 7 mm Clinical attachment level is calculated as probing depth plus recession (measured from the cementoenamel junction), so 4 mm + 3 mm = 7 mm.
3. A patient reports a tooth that hurts briefly when drinking cold water but the pain resolves within a few seconds of removing the stimulus. There is no spontaneous pain history. Which type of pulpal condition does this most likely represent?
- AAcute apical abscess
- BChronic apical periodontitis
- CIrreversible pulpitis
- DReversible pulpitis
Show answer
D. Reversible pulpitis Short, stimulus-provoked pain that resolves quickly is characteristic of reversible pulpitis, as opposed to the spontaneous, lingering pain of irreversible pulpitis.
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