Tosun Gul, Koyuturk Alp Erdin, Sener Yagmur, Sengun Abdulkadir
Department of Pediatric Dentistry, Faculty of Dentistry, Selçuk University, Konya, Turkey.
Int J Paediatr Dent. 2008 Jan;18(1):62-9. doi: 10.1111/j.1365-263X.2007.00856.x.
As bond strength of currently available adhesive systems in caries-affected teeth dentin on primary tooth dentin was not well known, the bond strength of two bonding systems (PQI and OptiBond Solo Plus) was evaluated on caries-affected and sound primary molar tooth dentin and observed the micromorphology of the adhesive-dentin interfaces.
By grinding both the sound (n = 30) and caries-affected (n = 30) approximal surfaces of teeth, flat dentin surfaces were obtained. The prepared surfaces were bonded with one of the each adhesive systems and a composite resin. After storing the bonded specimens in water at 37 degrees C for 24 h, the samples were sectioned and the bond strength of the adhesive systems was tested by the microshear test method. The data were statistically analysed.
Microshear bond strengths of PQI group for caries-affected and sound primary tooth dentin were 9.43 +/- 2.44 (MPa) and 9.32 +/- 2.95 (MPa) (P > 0.05), respectively, and the bond strengths of OptiBond Solo Plus group for caries-affected and sound primary tooth dentin were 15.33 +/- 3.59 (MPa) and 11.96 +/- 2.30 (MPa) (P < 0.05), respectively. Micromorphological features between sound and caries-affected dentin were similar in both PQI and OptiBond Solo Plus groups.
Both the adhesives showed significantly different bond strengths in caries-affected dentin but showed similar bond strengths in sound dentin.
由于目前可用的粘结系统在乳牙龋损牙本质上的粘结强度尚不明确，因此评估了两种粘结系统（PQI和OptiBond Solo Plus）在龋损和健康的乳磨牙牙本质上的粘结强度，并观察了粘结剂与牙本质界面的微观形态。
通过磨削牙齿的健康（n = 30）和龋损（n = 30）邻面，获得平坦的牙本质表面。将制备好的表面用每种粘结系统之一和复合树脂进行粘结。将粘结后的标本在37℃水中储存24小时后，将样品切片，并用微剪切试验方法测试粘结系统的粘结强度。对数据进行统计学分析。
PQI组在龋损和健康乳牙牙本质上的微剪切粘结强度分别为9.43±2.44（MPa）和9.32±2.95（MPa）（P>0.05），OptiBond Solo Plus组在龋损和健康乳牙牙本质上的粘结强度分别为15.33±3.59（MPa）和11.96±2.30（MPa）（P<0.05）。PQI组和OptiBond Solo Plus组中，健康牙本质和龋损牙本质之间的微观形态特征相似。
两种粘结剂在龋损牙本质中的粘结强度有显著差异，但在健康牙本质中的粘结强度相似。
