Department of Restorative Dentistry, School of Dentistry, University G. D'Annunzio, Chieti, Italy.
J Endod. 2010 Jan;36(1):153-6. doi: 10.1016/j.joen.2009.09.036.
The aim of this in vitro study was to evaluate the influence that resin composite and porcelain veneer restorations, associated or not to fiber post placement, have on fracture resistance and deflection of pulpless anterior teeth.
One hundred twenty freshly extracted human maxillary central incisors were selected. Teeth were randomly divided into 7 experimental groups (veneer preparation/resin composite veneer placement/endodontic therapy and resin composite veneer placement/endodontic therapy, fiber post and resin composite veneer placement/porcelain veneer placement/endodontic therapy and porcelain veneer placement/endodontic therapy, fiber post and porcelain veneer placement) and a control group (n = 15). Specimens were loaded to fracture recording crown deflection, and data were statistically analyzed.
Veneer preparations did not significantly influence fracture resistance of incisors. On the contrary, veneer preparation significantly increased specimen deflection values. Fiber posts seemed to significantly increase mean maximum load values for endodontically treated teeth restored with either composite or porcelain veneers.
A fiber post restoration can be suggested when endodontic treatment is associated with veneer restoration. Veneer restorations seem to be an optimal choice also for endodontically treated teeth.
本体外研究旨在评估树脂复合材料和瓷贴面修复体，以及纤维桩的放置与否，对无髓前牙的抗折力和挠度的影响。
选择 120 颗新鲜拔出的上颌中切牙。牙齿被随机分为 7 个实验组（贴面预备/树脂复合贴面放置/根管治疗和树脂复合贴面放置/根管治疗、纤维桩和树脂复合贴面放置/瓷贴面放置/根管治疗和瓷贴面放置/根管治疗、纤维桩和瓷贴面放置）和对照组（n = 15）。对标本进行加载至断裂，记录牙冠挠度，并对数据进行统计学分析。
贴面预备并不显著影响切牙的抗折力。相反，贴面预备显著增加了试件挠度值。纤维桩似乎显著增加了用复合树脂或瓷贴面修复的根管治疗后牙齿的最大平均载荷值。
当根管治疗与贴面修复联合应用时，可以建议使用纤维桩修复。贴面修复似乎也是根管治疗后牙齿的最佳选择。
