CAJ | 학술논문

目的：探讨不同纤维桩表面处理方案对修复后牙根抗折裂性能的影响，并为临床口腔修复积累经验。方法选取于2013年3月至2014年5月行正畸拔除的33颗前磨牙作为样本。利用随机数字表法将33根纤维桩进行分组，分别设为 A 组（对照组）、B 组（喷砂组）和 C 组（过氧化氢酸蚀组）。将上述纤维桩置于离体牙内，树脂成核，并行金属全冠修复。样本牙经冷热循环及循环加载模拟口腔环境处理后，将其置于电子万能实验机上测评其抗折裂强度，计算折裂率。结果三组间牙根长度、颈部颊舌径、颈部近远中径差异无统计学意义（ P ﹥0.05）；B 组和 C 组抗折裂强度均高于 A 组（ P ﹤0.05），B 组与 C 组的抗折裂强度差异无统计学意义（ P ﹥0.05）。A 组牙齿折裂率为81.8％，明显高于 B 组和 C 组牙齿折裂率的36.4％、36.4％，差异均有统计学意义（ P ﹤0.05）；B 组和 C 组牙齿折裂率差异无统计学意义（ P ﹥0.05）。结论纤维桩表面行喷砂或过氧化氢酸蚀处理后，能有效增强修复后牙根的抗折裂强度，取得较为满意的临床疗效。
목적：탐토불동섬유장표면처리방안대수복후아근항절렬성능적영향，병위림상구강수복적루경험。방법선취우2013년3월지2014년5월행정기발제적33과전마아작위양본。이용수궤수자표법장33근섬유장진행분조，분별설위 A 조（대조조）、B 조（분사조）화 C 조（과양화경산식조）。장상술섬유장치우리체아내，수지성핵，병행금속전관수복。양본아경랭열순배급순배가재모의구강배경처리후，장기치우전자만능실험궤상측평기항절렬강도，계산절렬솔。결과삼조간아근장도、경부협설경、경부근원중경차이무통계학의의（ P ﹥0.05）；B 조화 C 조항절렬강도균고우 A 조（ P ﹤0.05），B 조여 C 조적항절렬강도차이무통계학의의（ P ﹥0.05）。A 조아치절렬솔위81.8％，명현고우 B 조화 C 조아치절렬솔적36.4％、36.4％，차이균유통계학의의（ P ﹤0.05）；B 조화 C 조아치절렬솔차이무통계학의의（ P ﹥0.05）。결론섬유장표면행분사혹과양화경산식처리후，능유효증강수복후아근적항절렬강도，취득교위만의적림상료효。
Objective To explore the pile surface treatment schemes of different fiber anti impact fracture properties of repair after the root,and accumulated experience for clinical prosthodontics. Methods The 33 premolar extractions in orthodontic treatment in the hospital were considered as a sample in 2014 March ~ May months. By using the method of random digits table 33 fiber pile groups,all cases were divided into group A(control group),group B(sandblasting group)and group C(hydrogen peroxide acid group). The fiber pile in vitro,and resin core, parallel metal full crown restoration. The sample teeth by thermal cycling and cyclic loading is simulated oral environment after treatment. The e-lectronic universal testing machine was used to evaluate its anti fracture strength. Results There was no significant difference between the three groups,root length of neck buccolingual diameter,neck mesiodistal diameter difference( P ﹥ 0. 05). B group and C group,the fracture resist-ance were higher than in A group( P ﹤ 0. 05). B group and fracture resistance difference between C group had no statistical significance( P ﹥0. 05). A set of teeth fracture rate was 81. 8% ,significantly higher than that in B group and C group of tooth fracture rate of 36. 4% ,36. 4% , the differences were statistically significant( P ﹤ 0. 05). B group and C group of tooth fracture rates were not statistically significant( P ﹥ 0. 05). Conclusion Fiber post surface for blasting or hydrogen peroxide after acid etching,can effectively enhance the repair after root fracture resist-ance,made the clinical effect is satisfactory,it is worth popularizing in clinic.