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Cracked Tooth
何偉宏 

Wei Hung He
裂⿒齒症的
治療對策
AAE, 2008, Cracking the cracked tooth code
AAE, 2008, Cracking the cracked tooth code
AAE, 2008, Cracking the cracked tooth code
AAE, 2008, Cracking the cracked tooth code
AAE, 2008, Cracking the cracked tooth code
治療⽬目標
• 防⽌止裂痕leakage
• 結構加強及保護
• 鄰接⾯面:可以視情況去除裂痕,

但不超過CEJ
• 窩洞洞底部:除非有蛀牙或裂到pulp裡了了,

不然不必挖
請儘量量別挖這裡!!!
AAE, 2008, Cracking the cracked tooth code
防⽌止裂痕leakage:裂痕的移除原則
Banerji S, 2010
結構加強及保護:裂牙的緊急處理理⽅方式
Banerji S, 2010
• without cusp coverage (ClassII OD)
• with cusp coverage (onlay, overlay)
利利⽤用CRF補強的⽅方式
結構加強及保護:裂牙的緊急處理理⽅方式
?
?
裂痕正式處理理⽅方式
?
?
酸呀~
?
?
?
Crown coverage
• Endo轉診的cases中,cracked teeth佔9.7% (796/8175)
• 127⼈人為reversible pulpitis(皆以crown治療)

其中21⼈人在58天後轉為irreversible pulpitis

其中6⼈人在149天後轉為necrotic pulp

reversible pulpitis的cases,有20%在半年年內需要Endo tx.
⾞車車磨Full crown有何疑慮?
• ⾞車車牙產⽣生的熱會傷害pulp,full-coverage
crown製作後的牙⿒齒,有3-22%的機會需Endo

Karlsson S, 1986

Valderhaug J, 1997

Saunders WP, 1998
• ⾞車車牙時需light force、充⾜足噴⽔水、新的burs
Hilton TJ., 2013
Indirect Onlay coverage
• resin onlay黏著後進⾏行行觀察

第⼀一週:88.37%不會疼痛,4.65%對冷及咬合敏感

第四週:93.02%不會疼痛,2.32%對冷及咬合敏感

共6.89%需要根管治療
• resin onlay 6年年成功率:93.02%
Direct composite splinting-

Cusp coverage or not?
• 受測共40顆,cracked tooth直接以樹脂進⾏行行填補
• 分為兩兩組:cusp coverage vs. without cusp coverage
cusp coverage
without cusp coverage
成功率100%
成功率94%
Case from Dr. David Clark
• immediate direct composite resin overlay的中期(7年年)成功率⾼高,
具有不錯的臨臨床治療價值(將來來也可再換成ceramic)
• onlay/overlay兼顧保護功能及保守性治療
• 若若有reversible pulpitis,建議不要直接跳到做full crown,以減少
需根管治療的機會(20% Endo…討厭的事是他不會⾺馬上發⽣生!!!)
• 治療指引中,cracked teeth無預防性根管治療的必要
整理理
Diagnosis
Concept
•Deep caries management
•Cracked tooth management
•Sealing is the deal
Outline
Diagnosis
• 能不能留留住牙⿒齒? 怎麼留留?
• 能不能留留住牙髓? 怎麼留留?
診斷,因為我們想知道:
1、X光片
2.6mmEnamel margin
0-2.5mm
Caries margin
2nd, 3rd dentin…
順序: 1 2 3 4
Rubber dam
2、活性測試
測死最準測不到時最準 測活最準最⽅方便便
3、咬合測試
Cracked or leakage?
Biting pain… before removing the restoration
cracked tooth
biting pain(+/-) biting pain(+) biting pain(-)
test with direct composite coverage

without bonding
step 1 

cracked tooth
biting pain(++) biting pain(-)
test with direct composite coverage

without bonding
step 2

leakage or gap
biting pain(+/-??) biting pain(+)
step 3

If biting pain

in both situations…!?
+ percussion test
• 樹脂加⾼高1-1.5mm幫助診斷
• 直接樹脂加⾼高黏著3個⽉月創造咬合空間
• 製作最終復形物
• 131 / 151成功
• 20例例失敗

做endo:11

resin咬裂:5

Immediate resin overlay能提供

⼀一個相當可信賴的診斷及治療效果預測
?
4、光照檢查
整圈都要檢查⼀一次
重點:marginal ridge
簡易易光源DIY
5、染⾊色:caries & crack
幫助清出乾淨的magin,以得到完美sealing
三年年的成功率,乳牙96%,恆牙93%
?
幫助定位margin上

crack line的深度

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