CAJ | 학술논문

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。
목적：연구파리섬유장핵관화수지핵관수복하합제일전마아불동수량결손벽후적항절능력。방법근거불동적결손벽수목급수복방법,수궤분위6조。 A1조：일벽결손+파리섬유장핵관수복；A2조：일벽결손+수지핵관수복；B1조：이벽결손+파리섬유장핵관수복；B2조：이벽결손+수지핵관수복；C1조：삼벽결손+파리섬유장핵관수복；C2조：삼벽결손+수지핵관수복。사용역학실험궤대각조리체아진행가재직지파배,기록최대부재치급파배모식。결과채용량독립양본적t검험진행통계。결과일벽결손시,섬유장핵관수복조(A1조)여수지핵관수복조(A2조)지간적최대부재력차이무통계학의의(tA=1.830,PA=0.10)。이벽급삼벽결손시,파리섬유장핵관수복조(B1조、C1조)분별여수지핵관수복조(B2조、C2조)지간적최대부재력차이유통계학의의(tB=4.741,PB=0.001；tC=3.491,PC=0.005)。불가수복성절렬주요발생재A1、A2、B2조。결론파리섬유장핵관여수지핵관수복일벽결손아체후항절능력몰유현저성차이,인차림상상대일벽결손아체가이지작수지핵관진행수복。당아체유이벽혹자삼벽결손시,파리섬유장핵관수복후아체적항절능력우우수지핵관수복후아체적항절능력。
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).