AGD Diagnostic & Treatment Planning Techniques 2 — Questions and Answers
Question 1: A patient presents with a 3 mm probing depth on the buccal of tooth #14 with bleeding on probing. Which diagnosis is most appropriate?
- Healthy periodontium
- Gingivitis on a reduced periodontium
- Gingivitis on an intact periodontium (Correct answer)
- Stage I periodontitis
Correct answer: Gingivitis on an intact periodontium
Bleeding on probing with 3 mm depth and no radiographic bone loss indicates gingivitis on an intact periodontium.
Question 2: Which cephalometric landmark is located at the most anterior point of the mandibular symphysis?
- Pogonion (Correct answer)
- Gnathion
- Menton
- B-point
Correct answer: Pogonion
Pogonion (Pog) is the most anterior point of the bony chin on the mandibular symphysis.
Question 3: A bitewing radiograph reveals a radiolucency confined to the outer half of dentin on the proximal surface of tooth #29. How should this lesion be classified?
- Enamel caries (E2)
- Outer dentin caries (D1) (Correct answer)
- Inner dentin caries (D2)
- Pulpal involvement
Correct answer: Outer dentin caries (D1)
A lesion extending into the outer half of dentin is classified as D1 (outer dentin) caries.
Question 4: During comprehensive examination, a patient has a maximum interincisal opening of 28 mm. This finding most likely indicates:
- Normal range of motion
- Mild restricted opening
- Severe restricted opening (Correct answer)
- Hypermobility
Correct answer: Severe restricted opening
Normal maximum interincisal opening is 40–60 mm; 28 mm represents severe restricted opening.
Question 5: Which index is used specifically to quantify gingival inflammation based on color, contour, and bleeding?
- Plaque Index (PI)
- Gingival Index (GI) (Correct answer)
- Periodontal Screening and Recording (PSR)
- Community Periodontal Index (CPI)
Correct answer: Gingival Index (GI)
The Gingival Index (GI) by Löe and Silness scores inflammation based on color, contour, and bleeding.
Question 6: A 55-year-old patient presents with cervical abrasion lesions on multiple teeth. The MOST appropriate diagnostic question to ask is:
- Do you grind your teeth at night?
- What type of toothbrush and brushing technique do you use? (Correct answer)
- Do you consume acidic beverages daily?
- Have you experienced recent weight loss?
Correct answer: What type of toothbrush and brushing technique do you use?
Cervical abrasion is most commonly caused by aggressive horizontal brushing with a hard-bristle toothbrush.
Question 7: When evaluating a periapical radiograph, the lamina dura appears discontinuous at the apex of tooth #9. This finding is MOST consistent with:
- External cervical resorption
- Periapical pathology (Correct answer)
- Normal anatomic variation
- Condensing osteitis
Correct answer: Periapical pathology
Discontinuity or loss of lamina dura at the apex typically indicates periapical inflammatory pathology.
AGD Diagnostic & Treatment Planning Techniques 2
A patient presents with a 3 mm probing depth on the buccal of tooth #14 with bleeding on probing.
Which diagnosis is most appropriate?