Marginal adaptation, retention and fracture resistance of adhesive composite restorations on devital teeth with and without posts.
Marginal adaptation, retention and fracture resistance of adhesive composite restorations on devital teeth with and without posts.
复制标题
带桩和不带桩的活牙上粘合复合材料修复体的边缘适应、固位和抗断裂性。
作者：
I. Krejci;O. Duc;D. Dietschi;E. D. de Campos
这项体外研究产生的数据质量的边缘适应性，抗断裂性和保留的几个间接粘合剂复合材料配置根治疗前磨牙之前和之后的长期疲劳测试，并比较这些结果的控制组的粘合剂高嵌体上的“重要”的牙齿。每组六根处理提取的人前磨牙，四种不同的修复配置与不粘纤维桩，进行了评价。另一组6颗前磨牙，用稀释的马血清模拟牙髓液进行“再生”，并用粘合剂复合高嵌体修复，作为对照。在200倍放大的扫描电镜中，使用复制技术和定量评价评估长期咬合负荷（最大49 N，1，200，000次咬合负荷循环）前后的边缘适应性。装载后记录损失的单位数。通过使用万能试验机对疲劳样品进行抗断裂性和断裂模式评价。加载前后组间“连续边缘”占总边缘长度的百分比无显著差异（p > 0.05）。载荷仅对两组的“连续边缘”占总边缘长度的百分比有显著影响（p < 0.05）。两种材料的抗折强度无显著性差异（p > 0.05），无明显的折损。结果表明，无论是轻度龋坏还是重度龋坏的乳牙，微创粘接修复方法都是有前途的。
This in vitro study generated data on the quality of marginal adaptation, fracture resistance and retention of several indirect adhesive composite configurations on root-treated premolars before and after a long-term fatigue test and compared these results to a control group of adhesive onlays on "vital" teeth. Six root-treated extracted human premolars per group, with four different restorative configurations with and without adhesive fiber posts, were evaluated. Another group of six premolars, "revitalized" by using diluted horse serum to simulate pulpal fluid and restored with adhesive composite onlays, served as the control. Marginal adaptation before and after long-term occlusal loading (1,200,000 occlusal loading cycles at max 49 N) was assessed by using the replica technique and quantitative evaluation in SEM at 200x magnification. The number of lost restorations was recorded after loading. Fracture resistance and fracture patterns were evaluated by using a universal-testing machine on the fatigued samples. No significant differences (p > 0.05) between groups were detected before and after loading for the percentage of "continuous margin" at the total marginal length. Loading had a significant (p < 0.05) effect on the percentage of "continuous margin" for the total marginal length of two groups only. No significant difference (p > 0.05) for fracture resistance was detected and no lost restorations were observed. The results suggest that for both the less decayed and the more significantly decayed devital teeth, the minimally invasive adhesive restorative approach is promising.
牙冠及其替代品的使用变化。
影响因子：
2.3
作者：
Shugars,DA;HaydenJr,WJ;Crall,JJ;Scurria,MS
通讯作者：
Scurria,MS
使用牙本质液蛋白浓度测量狗的牙髓毛细血管反射系数。
影响因子：
3
作者：
Pashley,DH;Nelson,R;Williams,EC;Kepler,EE
通讯作者：
Kepler,EE