阿摩線上測驗
25.在牙科植體周圍至少應有多少骨寬度，日後植體長期成功率才會高？
(A)0.3 mm
(B)0.5 mm
(C)0.7 mm
(D)1 mm
統計： A(8), B(46), C(8), D(311), E(0) #1032600
詳解 (共 1 筆)
答案：✅ (D) 1 mm
原則
植體周圍需保留足夠的骨厚度，以維持：
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骨血液供應
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骨整合（osseointegration）
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避免骨吸收與骨開窗（fenestration）
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提高長期成功率
一般建議：
植體表面至頰側及舌側皮質骨至少保留 1 mm 骨厚度
因此若植體直徑為 4 mm，理想齒槽骨寬度至少約：
4 mm + 1 mm + 1 mm = 6 mm
國考常考數字
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植體周圍骨厚度 ≥ 1 mm
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兩植體間距 ≥ 3 mm
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植體與自然牙間距 ≥ 1.5 mm
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植體與下齒槽神經距離 ≥ 2 mm
記憶法
「植體左右各留 1 mm 骨」
所以本題答案為：
✅ (D) 1 mm
Good question. The 1 mm rule from your previous question refers to the minimum bone thickness around an implant for long-term maintenance. However, when discussing the buccal (facial) bone plate, many implantologists prefer a thicker dimension.
Buccal bone thickness recommendations
| Buccal bone thickness | Clinical implication |
|---|---|
| < 0.5 mm | High risk of resorption after implant placement and remodeling |
| 0.5–1.0 mm | Often considered the absolute minimum, but still associated with greater crestal bone loss and soft tissue recession |
| ≥ 1.5–2.0 mm | Generally considered more predictable for long-term esthetic stability, especially in the anterior maxilla |
Why is 0.5 mm mentioned?
You may see studies reporting that:
A buccal bone plate < 0.5 mm is prone to significant post-extraction and post-implant remodeling.
Therefore, some authors use 0.5 mm as a critical threshold, not as an ideal thickness.
For examinations
Different numbers may appear depending on what is being asked:
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Minimum bone surrounding implant → 1 mm (common exam answer)
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Critical buccal plate thickness below which resorption is likely → 0.5 mm
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Ideal buccal plate thickness for esthetic zone implants → 2 mm (or at least 1.5 mm)
Quick memory aid
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0.5 mm = danger zone
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1 mm = minimum acceptable around implant
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2 mm = ideal buccal bone for esthetic outcomes
So if someone says "buccal bone plate 0.5 mm," they are usually referring to the minimum residual thickness or a threshold associated with increased resorption, not the preferred thickness for long-term implant success.
