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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of bonding amalgam on the reinforcement of teeth.
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Effect of bonding amalgam on the reinforcement of teeth.

机译：粘合汞齐对牙齿增强的作用。

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STATEMENT OF PROBLEM: Extensively weakened maxillary premolars may be more prone to fracture due to their small size. The weakening may be due to excessive demineralization of supporting tooth structure caused by dental caries or nonconservative or traumatic tooth preparation. PURPOSE: The purpose of this study was to determine the effect of a bonded amalgam restoration on reinforcement of weakened tooth structure. MATERIAL AND METHODS: Forty extracted noncarious maxillary premolars were collected. The teeth were prepared individually with mesio-occluso-distal (MOD) cavities with specific dimensions (cavity width buccolingually, 1.8 to 2.1 mm; palatal cusp width, 1.7 to 2.2 mm; cusp height, 4.7 to 5.0 mm) and divided into 4 groups (n=10). The first group was prepared and not restored (control). The other 3 groups were restored with amalgam (Megalloy), bonding agent (Syntac) with amalgam, and amalgam with an adhesive resin luting agent (Resinomer), respectively. Fracture load (in kg) for specimens in all groups was determined by applying a vertical splitting load through a specially shaped steel rod at a crosshead speed of 1 mm/min. The data were analyzed by 1-way analysis of variance and least significant difference statistical tests (alpha=.01). RESULTS: The mean force and standard deviation values required to fracture the cusp of the control and amalgam groups were 25.2+/-3.27 kg and 26.1+/-3.07 kg , respectively, with no significant difference between the 2 groups (P>.01). Significant differences were found between control and Syntac groups (29.8+/-2.80 kg), as well as between control and Resinomer groups (37.9+/-3.55 kg). Significant difference was also noted between Syntac and Resinomer groups (P>.01) CONCLUSION: It was concluded that the use of resin cement increased the fracture resistance of the tooth with an MOD amalgam restoration.
机译：问题陈述：由于上颌前磨牙尺寸小，其强度会大大降低。弱化可能是由于龋齿或不保守或外伤的牙齿准备引起的支撑牙齿结构的过度脱盐。目的：本研究的目的是确定粘结的汞合金修复物对弱化牙齿结构的增强作用。材料与方法：收集四十个非龋齿上颌前磨牙。用具有特定尺寸的中颌咬合（MOD）腔分别准备牙齿（颊侧腔宽度为1.8至2.1 mm; pa尖宽度为1.7至2.2 mm;尖高度为4.7至5.0 mm），并分为4组（n = 10）。第一组已经准备好，没有恢复（对照）。其他3组分别用汞齐（Megalloy），粘合剂（Syntac）和汞齐，以及粘合剂树脂浸润剂（Resinomer）修复。通过以1mm / min的十字头速度通过特殊形状的钢棒施加垂直劈裂载荷来确定所有组的样品的断裂载荷（以kg为单位）。通过方差单向分析和最小显着差异统计检验（alpha = .01）对数据进行分析。结果：使对照组和汞合金组的尖端断裂所需的平均力和标准偏差值分别为25.2 +/- 3.27 kg和26.1 +/- 3.07 kg，两组之间无显着性差异（P> 0.01） ）。在对照组和Syntac组之间（29.8 +/- 2.80 kg），以及在对照组和树脂单体组之间（37.9 +/- 3.55 kg）发现了显着差异。结论：Syntac和Resinomer组之间也存在显着差异（P> .01）。结论：结论：使用MOD汞齐修复剂，使用树脂胶粘剂可增强牙齿的抗断裂性。

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