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中华口腔医学研究杂志(电子版)

中华口腔医学研究杂志(电子版) ›› 2015, Vol. 09 ›› Issue (04) : 289 -294. doi: 10.3877/cma.j.issn.1674-1366.2015.04.006

所属专题： 文献；

基础研究

玻璃纤维桩对不同程度牙体缺损抗折能力的影响
张昕1, 周捷宇1, 连克乾1,†(), 司姗姗1, 廖燕芬1   
  1. 1. 510080　广州，中山大学附属第一医院口腔科
  • 收稿日期:2015-05-03 出版日期:2015-08-01
  • 通信作者: 连克乾
  • 基金资助:
    广东省科技计划(2010B031300020)

Influence of glass fibre posts on the fracture resistance of teeth with different defect in vitro

Xin Zhang1, Jieyu Zhou1, Keqian Lian1,†(), Shanshan Si1, Yanfen Liao1   

  1. 1. The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
  • Received:2015-05-03 Published:2015-08-01
  • Corresponding author: Keqian Lian
  • About author:
    Corresponding author: Lian Keqian, Email:
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引用本文：

张昕, 周捷宇, 连克乾, 司姗姗, 廖燕芬. 玻璃纤维桩对不同程度牙体缺损抗折能力的影响[J]. 中华口腔医学研究杂志(电子版), 2015, 09(04): 289-294.

Xin Zhang, Jieyu Zhou, Keqian Lian, Shanshan Si, Yanfen Liao. Influence of glass fibre posts on the fracture resistance of teeth with different defect in vitro[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2015, 09(04): 289-294.

目的

研究玻璃纤维桩核冠和树脂核冠修复下颌第一前磨牙不同数量缺损壁后的抗折能力。

方法

根据不同的缺损壁数目及修复方法，随机分为6组。A1组：一壁缺损+玻璃纤维桩核冠修复；A2组：一壁缺损+树脂核冠修复；B1组：二壁缺损+玻璃纤维桩核冠修复；B2组：二壁缺损+树脂核冠修复；C1组：三壁缺损+玻璃纤维桩核冠修复；C2组：三壁缺损+树脂核冠修复。使用力学实验机对各组离体牙进行加载直至破坏，记录最大负载值及破坏模式。结果采用两独立样本的t检验进行统计。

结果

一壁缺损时，纤维桩核冠修复组(A1组)与树脂核冠修复组(A2组)之间的最大负载力差异无统计学意义(tA=1.830，PA=0.10)。二壁及三壁缺损时，玻璃纤维桩核冠修复组(B1组、C1组)分别与树脂核冠修复组(B2组、C2组)之间的最大负载力差异有统计学意义(tB=4.741，PB=0.001；tC=3.491，PC=0.005)。不可修复性折裂主要发生在A1、A2、B2组。

结论

玻璃纤维桩核冠与树脂核冠修复一壁缺损牙体后抗折能力没有显著性差异，因此临床上对一壁缺损牙体可以只作树脂核冠进行修复。当牙体有二壁或者三壁缺损时，玻璃纤维桩核冠修复后牙体的抗折能力优于树脂核冠修复后牙体的抗折能力。

关键词: 玻璃纤维桩, 缺损壁数, 抗折强度, 折裂模式
Objective

To analyze the influence of glass fibre post restoration on premolars fracture resistance with different numbers of coronal dentin walls defect.

Methods

According to different numbers of coronal dentin walls defect and restoration methods, forty-eight mandibular first premolars were randomly divided into six groups. Group A1: one-wall defect with glass fibre post-composite resin core restoration; Group A2: one-wall defect with composite resin core restoration; Group B1: two-wall defect with glass fibre post-composite resin core restoration; Group B2: two-wall defect with composite resin core restoration; Group C1: three-wall defect with glass fibre post-composite resin core restoration; Group C2: three-wall defect with composite resin core restoration. Every sample was loaded till failure by mechanical testing machine. The maximum loading value and failure mode were recorded. Two independent samples t test was used in statistical analysis.

Results

There is no statistical significance in the maximum loading capacity between Group A1 and Group A2(P > 0.05). Statistical significance was found in the maximum loading capacity between Group B1 and B2, as well as Group C1 and C2(P < 0.05). Irreparable fracture mainly occurs in Group A1, A2 and B2.

Conclusions

There is no effect of glass fibre post-composite core restored on the fracture resistance of teeth with one-wall defect(tA=1.830, PA=0.10). When the number of coronal dentin wall defect is two or three, glass fibre post-composite core restoration is better than composite resin core restoration on the fracture resistance of teeth(tB=4.741, PB=0.001; tC=3.491, PC=0.005).

Key words: Glass fibre posts, Coronal dentin wall, Fracture resistance, Fracture mode
图1 单根管下颌第一前磨牙缺损壁的制备及精修
图2 牙周膜及牙槽骨包埋模拟图
图3 牙周膜及牙槽骨包埋实物图
图4 破坏力学测试离体牙受力加载图
表1 各组单根管下颌第一前磨牙离体牙外形数据(mm，±s)
组别 牙数(颗) 总长度 牙根长度 颊舌径 近远中径
A1组 8 22.35 ± 1.12 14.34 ± 0.50 7.28 ± 0.32 5.28 ± 0.21
A2组 8 22.83 ± 1.07 14.04 ± 0.68 7.26 ± 0.37 5.39 ± 0.19
B1组 8 22.75 ± 0.60 14.19 ± 0.41 6.69 ± 0.27 4.03 ± 0.25
B2组 8 22.16 ± 0.42 13.54 ± 0.57 7.54 ±0.77 5.01 ± 0.16
C1组 8 22.03 ± 0.76 14.03 ± 0.74 7.15 ± 0.41 5.20 ± 0.20
C2组 8 21.94 ± 0.79 14.06 ± 0.45 7.04 ± 0.28 5.23 ± 0.21
表2 各组单根管下颌第一前磨牙离体牙的最大负载力
组别 牙数(颗) 最大负载值(N，±s)
A1组 8 1485.88 ± 257.85
A2组 8 1251.38 ± 254.72
B1组 8 1181.75 ± 332.24
B2组 8 556.75 ± 169.20
C1组 8 808.13 ± 209.34
C2组 8 409.75 ± 245.69
表3 各组单根管下颌第一前磨牙离体牙折裂类型(颗)
组别 牙数 Ⅰ型 Ⅱ型 Ⅲ型 不可复性折裂
A1组 8 2 4 2 3
A2组 8 2 5 1 2
B1组 8 1 5 2 2
B2组 8 2 6 0 0
C1组 8 2 6 0 0
C2组 8 4 3 1 1
合计 ? 13 29 6 8
图5 本实验离体牙主要折裂模式类型
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