37.附圖A及B為牙根斷裂的牙齒，臨床檢視A不太搖動，B搖動度很大，就牙根斷裂的位置估計其預後，下列敘 述何者最合理？
(A)A圖中牙根斷裂位置較偏向根尖處，預後應該較B斷裂處偏向齒頸部者為佳
(B)A圖中牙根斷裂位置較偏向根尖處，雖臨床上不搖，預後應該較B斷裂處偏向齒頸部者為差
(C)無論A或B，預後都很差，一定都要拔除並以植牙重建最好
(D)無論A或B，只要做好根管治療，並在根管中放投藥，增進牙本質修復，預後都可以很好5d37c0232cecd.jpg

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統計： A(862), B(84), C(23), D(18), E(0) #2042234

詳解 (共 3 筆)

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Location Frequency Prognosis
Apical third Most favorable Excellent
Middle third Intermediate Good
Cervical third Least favorable Poor
Vertical mobility near CEJ Often cervical fracture Guarded to poor
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Management

1. Reposition the Coronal Fragment

If the coronal segment is displaced:

  • Gently reposition it as soon as possible.
  • Confirm position radiographically.

2. Splinting

Fracture Site Recommended Splint Time
Apical or middle third 4 weeks
Cervical third Up to 4 months

Use a flexible splint, not a rigid splint.

3. Follow-up

Clinical and radiographic review at:

  • 4 weeks
  • 6–8 weeks
  • 4 months
  • 6 months
  • 1 year
  • Then yearly for at least 5 years

Monitor:

  • Mobility
  • Percussion sensitivity
  • Pulp vitality
  • Periapical radiolucency
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