Bremer B D, Geurtsen W
Department of Prosthodontics, Medical University Hannover, Germany.
Am J Dent. 2001 Aug;14(4):216-20.
To determine the fracture resistance of teeth, following treatment with various types of adhesive restorations.
5 0 caries-free, extracted human molars were randomly divided into five groups consisting of 10 molars each. MOD cavities were prepared in 40 molars with a width in the facio-lingual direction of 50% of the intercuspal distances. The cavities were filled with the following materials: Cerec or IPS Empress ceramic inlays, Arabesk or Charisma F resin-based composite (RBC) restorations. The control group consisted of 10 sound, non-restored molars. All 50 teeth were loaded occlusally until fracture using a tensile testing machine. The statistical analysis included ANOVA, Kolmogorov-Smimov-test, Scheffé test, and boxplots.
There was no significant difference (P > 0.05) between the mean values of the sound teeth (2,102 N) and the teeth with the Cerec ceramic inlays (2,139 N). However, both groups demonstrated a significant difference (P < 0.05) when compared with the teeth with IPS Empress ceramic inlays (1,459 N) and Arabesk RBC restorations (1459 N). No significant differences were found between the last two groups. Molars restored with Charisma F composite restorations (1,562 N) revealed no significant difference when compared with all other groups including controls (P > 0.05). A stabilization of molars is possible by means of an adhesive restoration in the form of an "internal splinting" regardless of the restorative material used.
确定经各种类型粘结修复治疗后牙齿的抗折性。
50颗无龋的拔除人类磨牙随机分为五组，每组10颗磨牙。在40颗磨牙上制备MOD洞，颊舌向宽度为牙尖间距离的50%。用以下材料填充洞：Cerec或IPS Empress陶瓷嵌体、Arabesk或Charisma F树脂基复合材料（RBC）修复体。对照组由10颗完好、未修复的磨牙组成。使用拉伸试验机对所有50颗牙齿进行咬合加载直至折断。统计分析包括方差分析、柯尔莫哥洛夫-斯米尔诺夫检验、谢费检验和箱线图。
完好牙齿（2102N）和Cerec陶瓷嵌体修复牙齿（2139N）的平均值之间无显著差异（P>0.05）。然而，与IPS Empress陶瓷嵌体修复牙齿（1459N）和Arabesk RBC修复体（1459N）相比，这两组均显示出显著差异（P<0.05）。最后两组之间未发现显著差异。Charisma F复合树脂修复体修复的磨牙（1562N）与包括对照组在内的所有其他组相比无显著差异（P>0.05）。无论使用何种修复材料，通过“内部夹板”形式的粘结修复可实现磨牙的稳定。
