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Crown Lengthening Procedure Int H 組 葉宏偉、趙祐成、周庭暵、 林如明、王喆
CLP 方法: 切除部分牙齦 (Gingivectomy…) 修整骨頭的方式 (Bone contouring …) 利用矯正的力量 (Force eruption…) 將健康的齒質露出 目的:以 增加臨床牙冠長度 , 重建牙周組織的生物寬度 ,使牙周組織維持在健康的狀態,並 符合補綴的需求
CLP Before Crown Lengthening After Crown Lengthening
CLP Indication 1. 延遲性萌發 2. 補綴上的問題,例如要做 post 增強假牙之固位 3. 美觀的問題 ( 如  gum smiling) 4. 牙齦下的齲齒,不容易清除乾淨,邊緣不清楚,填補時會有口水及血液等汙染 5. 牙冠、牙根斷裂,將完好的齒質暴露出來,才能作固定的假牙 6. 牙齒過度的咬耗
CLP 術前準備 臨床上的檢查 Remove caries , crack enamel, dentin Remove improper C&B Image finding Root length, morphology Relation among defect ,prosthesis margin ,and alveolar bone 術後觀察 通常手術後 4~6 週後可以開始製作假牙。 在美觀比較重要的區域,如上顎前牙區則建議觀察較長的時間,待牙齦穩定後再做
牙冠加長術與贋復學的關係
Ferrule effect A ferrule a metal ring or cap put arount the end of a cane , to give added strength
補綴物修復時 若是齒質大量流失 ( 齲齒、斷裂 ) 或牙冠較短的牙齒 為了增加固持力 1.Post & Core 2.Finishing line 放在較深的牙齦溝內 缺點: 取模不易及所增加的長度有限 若是 Finishing line 過度深入,以至於侵犯生物寬度 -> 牙周組織發炎、牙周囊袋形成、附連喪失 (Attachment loss) -> 牙冠加長術 1. 解決 Delayed passive eruption 的牙周問題 2. 解決修復體所遭遇的困境,如固持力不足、牙齦下齲齒、牙冠牙根斷裂或根管穿孔等問題 3. 改善前牙美觀的缺陷,如 Gummy smile ,不對稱牙齦高度
當牙齒損傷到齒槽骨脊 (Alveolar crest) 時,例如深 度齲齒或斷裂所造成,而又必須作上固定假牙時: -> 侵犯 Biologic width : 牙周組織發炎、牙周囊袋形成、附連喪失 (Attachment loss) Biologic Width : 1961 Gargiulo et al. : -> Biologic width =  epithelial attachment + connective tissue attachment =  0.97 mm + 1.07 mm = 2.04 mm
 
1984 Drs. Nevins and Skurow : 若與補綴物有關,應該加上牙齦溝深度 Biologic width =  0.69mm +0.97 mm + 1.07 mm = 2.73 mm -> Biologic width  約為 3mm 左右 兩種生物寬度 (Biologic width ) 的界限考慮: 1.B.W. + 0.5 mm = 3.5 mm -> 適用於遭牙周疾病破壞,牙冠牙根比率不佳者,比 3mm 多提供 0.5mm ,來確保牙周復原後,補綴物的邊緣成 supragingival , 便於以後的磨削 2.B.W. + 1.5 mm = 4.5 mm -> 適用於牙冠齒質嚴重缺損,牙冠牙根比率佳的病例,比前一各 多 1mm ,提供圍箍效應 (ferrule effect) ,減少未來補綴物與冠心 根柱受力後旋轉脫離
Surgery Method for CLP 1.  Excessive Gingival Display 2  Apically Positioned flap  3. Bone contouring
Excessive Gingival Display Gummy smile Insufficient length of the clinical crowns Gingival margin resides over 1 mm coronal to the CEJ. Gingivectomy / gingiyoplasty precedure
Gummy smile 露出明顯牙齦 手術中 術後回診 牙冠比較短 術後一個月 三年後
Apically positioned flap with bone recontouring At least  4 mm  of sound tooth structure must  be exposed at time of surgery healing supracrestal soft tissues will proliferate coronally to  cover 2-3 mm of the root, leaving only 1-2mm of supragingivally  located sound tooth structure
Apically positioned flap with bone recontouring problem tooth and adjacent teeth  to  reduce the osseous profile
Apically positioned flap with bone recontouring Indication --multiple teeth in a quadrant or sextant of the dentition  Contraindication --single teeth in the esthetic zone
Apically positioned flap with bone recontouring
Apically positioned flap with bone recontouring
Apically positioned flap with bone recontouring
在某些情況下僅僅只做牙冠加長術,雖然解決了 biologic width 的問題,卻也可能造成 前牙美觀 的問題,因此進行手術前,首先要考慮的因素有: 1. 美觀 2. 是否牙周手術會傷及鄰近的牙周組織 若有上述的情形   則必須考慮強迫萌出術。   定義:爲了改變齒槽骨以及牙齦組織的位置, 利用矯正裝置使用連續性及輕微性的力量, 施力於牙齒而使牙齒向咬合面方向移動。 Orthodontic treatment
Force Eruption( 強迫萌出術 ) 單顆牙齒,特別是前牙區。先利用矯正治療,再加上纖維切斷術( Fiberotomy) 。使牙齒萌發到理想長度後,固位半年再繼續進行 prothesis 的治療、或是視結果配合第二期牙周手術,應是最理想的選擇。 OP  Procedure : 1.Anesthesia 2.Flap design 3.Incision 4.Flap elevation 5.Debridement 6.Osseous Recontouring 7.Flap adaptation 8.Periodontal dressing
Thanks for your  attention

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Clp Final

  • 1. Crown Lengthening Procedure Int H 組 葉宏偉、趙祐成、周庭暵、 林如明、王喆
  • 2. CLP 方法: 切除部分牙齦 (Gingivectomy…) 修整骨頭的方式 (Bone contouring …) 利用矯正的力量 (Force eruption…) 將健康的齒質露出 目的:以 增加臨床牙冠長度 , 重建牙周組織的生物寬度 ,使牙周組織維持在健康的狀態,並 符合補綴的需求
  • 3. CLP Before Crown Lengthening After Crown Lengthening
  • 4. CLP Indication 1. 延遲性萌發 2. 補綴上的問題,例如要做 post 增強假牙之固位 3. 美觀的問題 ( 如 gum smiling) 4. 牙齦下的齲齒,不容易清除乾淨,邊緣不清楚,填補時會有口水及血液等汙染 5. 牙冠、牙根斷裂,將完好的齒質暴露出來,才能作固定的假牙 6. 牙齒過度的咬耗
  • 5. CLP 術前準備 臨床上的檢查 Remove caries , crack enamel, dentin Remove improper C&B Image finding Root length, morphology Relation among defect ,prosthesis margin ,and alveolar bone 術後觀察 通常手術後 4~6 週後可以開始製作假牙。 在美觀比較重要的區域,如上顎前牙區則建議觀察較長的時間,待牙齦穩定後再做
  • 7. Ferrule effect A ferrule a metal ring or cap put arount the end of a cane , to give added strength
  • 8. 補綴物修復時 若是齒質大量流失 ( 齲齒、斷裂 ) 或牙冠較短的牙齒 為了增加固持力 1.Post & Core 2.Finishing line 放在較深的牙齦溝內 缺點: 取模不易及所增加的長度有限 若是 Finishing line 過度深入,以至於侵犯生物寬度 -> 牙周組織發炎、牙周囊袋形成、附連喪失 (Attachment loss) -> 牙冠加長術 1. 解決 Delayed passive eruption 的牙周問題 2. 解決修復體所遭遇的困境,如固持力不足、牙齦下齲齒、牙冠牙根斷裂或根管穿孔等問題 3. 改善前牙美觀的缺陷,如 Gummy smile ,不對稱牙齦高度
  • 9. 當牙齒損傷到齒槽骨脊 (Alveolar crest) 時,例如深 度齲齒或斷裂所造成,而又必須作上固定假牙時: -> 侵犯 Biologic width : 牙周組織發炎、牙周囊袋形成、附連喪失 (Attachment loss) Biologic Width : 1961 Gargiulo et al. : -> Biologic width = epithelial attachment + connective tissue attachment = 0.97 mm + 1.07 mm = 2.04 mm
  • 10.  
  • 11. 1984 Drs. Nevins and Skurow : 若與補綴物有關,應該加上牙齦溝深度 Biologic width = 0.69mm +0.97 mm + 1.07 mm = 2.73 mm -> Biologic width 約為 3mm 左右 兩種生物寬度 (Biologic width ) 的界限考慮: 1.B.W. + 0.5 mm = 3.5 mm -> 適用於遭牙周疾病破壞,牙冠牙根比率不佳者,比 3mm 多提供 0.5mm ,來確保牙周復原後,補綴物的邊緣成 supragingival , 便於以後的磨削 2.B.W. + 1.5 mm = 4.5 mm -> 適用於牙冠齒質嚴重缺損,牙冠牙根比率佳的病例,比前一各 多 1mm ,提供圍箍效應 (ferrule effect) ,減少未來補綴物與冠心 根柱受力後旋轉脫離
  • 12. Surgery Method for CLP 1. Excessive Gingival Display 2 Apically Positioned flap 3. Bone contouring
  • 13. Excessive Gingival Display Gummy smile Insufficient length of the clinical crowns Gingival margin resides over 1 mm coronal to the CEJ. Gingivectomy / gingiyoplasty precedure
  • 14. Gummy smile 露出明顯牙齦 手術中 術後回診 牙冠比較短 術後一個月 三年後
  • 15. Apically positioned flap with bone recontouring At least 4 mm of sound tooth structure must be exposed at time of surgery healing supracrestal soft tissues will proliferate coronally to cover 2-3 mm of the root, leaving only 1-2mm of supragingivally located sound tooth structure
  • 16. Apically positioned flap with bone recontouring problem tooth and adjacent teeth to reduce the osseous profile
  • 17. Apically positioned flap with bone recontouring Indication --multiple teeth in a quadrant or sextant of the dentition Contraindication --single teeth in the esthetic zone
  • 18. Apically positioned flap with bone recontouring
  • 19. Apically positioned flap with bone recontouring
  • 20. Apically positioned flap with bone recontouring
  • 21. 在某些情況下僅僅只做牙冠加長術,雖然解決了 biologic width 的問題,卻也可能造成 前牙美觀 的問題,因此進行手術前,首先要考慮的因素有: 1. 美觀 2. 是否牙周手術會傷及鄰近的牙周組織 若有上述的情形 則必須考慮強迫萌出術。   定義:爲了改變齒槽骨以及牙齦組織的位置, 利用矯正裝置使用連續性及輕微性的力量, 施力於牙齒而使牙齒向咬合面方向移動。 Orthodontic treatment
  • 22. Force Eruption( 強迫萌出術 ) 單顆牙齒,特別是前牙區。先利用矯正治療,再加上纖維切斷術( Fiberotomy) 。使牙齒萌發到理想長度後,固位半年再繼續進行 prothesis 的治療、或是視結果配合第二期牙周手術,應是最理想的選擇。 OP Procedure : 1.Anesthesia 2.Flap design 3.Incision 4.Flap elevation 5.Debridement 6.Osseous Recontouring 7.Flap adaptation 8.Periodontal dressing
  • 23. Thanks for your attention