天津医药
天津醫藥
천진의약
TIANJIN MEDICAL JOURNAL
2014年
5期
490-492
,共3页
桩核技术%根管充填%玻璃纤维桩%纤维桩长度%弹性模量%抗折强度%折裂模式
樁覈技術%根管充填%玻璃纖維樁%纖維樁長度%彈性模量%抗摺彊度%摺裂模式
장핵기술%근관충전%파리섬유장%섬유장장도%탄성모량%항절강도%절렬모식
post and core technique%root canal obturation%glass fiber post%fiber post length%elasticity modulus%frac-ture resistance%fracture mode
目的：研究玻璃纤维桩长度和纤维含量对牙齿抗折强度的影响，探索进行牙体缺损修复所适宜的玻璃纤维桩长度和纤维含量。方法选择42颗因正畸拔除完整的下颌前磨牙，随机分为A、B、C3个实验组，每组14颗牙。自釉牙骨质界上2 mm截冠后行完善的根管治疗，进行桩道预备，桩道深度分别为A组10 mm、B组8 mm、C组6 mm。每个实验组再各分成2个亚组，每组7颗牙。A1、B1、C1组应用纤维含量42%玻璃纤维桩，A2、B2、C2组应用纤维含量75%玻璃纤维桩，进行桩粘接、树脂核塑型及金属冠修复。将所有实验标本制成试件，置于万能材料实验机上进行抗折裂强度测试，记录牙根折断时的瞬间压力值以及试件折断的模式。结果玻璃纤维桩修复后的牙体抗折强度A组高于B组及C组，B组高于C组（均P<0.05）；纤维含量75%玻璃纤维桩高于纤维含量42%玻璃纤维桩（P<0.05）。结论用玻璃纤维桩修复缺损牙体时，在一定范围内，桩的长度越长，牙体抗折强度越大。纤维含量75%玻璃纤维桩修复后牙体抗折强度大于纤维含量42%玻璃纤维桩。
目的：研究玻璃纖維樁長度和纖維含量對牙齒抗摺彊度的影響，探索進行牙體缺損脩複所適宜的玻璃纖維樁長度和纖維含量。方法選擇42顆因正畸拔除完整的下頜前磨牙，隨機分為A、B、C3箇實驗組，每組14顆牙。自釉牙骨質界上2 mm截冠後行完善的根管治療，進行樁道預備，樁道深度分彆為A組10 mm、B組8 mm、C組6 mm。每箇實驗組再各分成2箇亞組，每組7顆牙。A1、B1、C1組應用纖維含量42%玻璃纖維樁，A2、B2、C2組應用纖維含量75%玻璃纖維樁，進行樁粘接、樹脂覈塑型及金屬冠脩複。將所有實驗標本製成試件，置于萬能材料實驗機上進行抗摺裂彊度測試，記錄牙根摺斷時的瞬間壓力值以及試件摺斷的模式。結果玻璃纖維樁脩複後的牙體抗摺彊度A組高于B組及C組，B組高于C組（均P<0.05）；纖維含量75%玻璃纖維樁高于纖維含量42%玻璃纖維樁（P<0.05）。結論用玻璃纖維樁脩複缺損牙體時，在一定範圍內，樁的長度越長，牙體抗摺彊度越大。纖維含量75%玻璃纖維樁脩複後牙體抗摺彊度大于纖維含量42%玻璃纖維樁。
목적：연구파리섬유장장도화섬유함량대아치항절강도적영향，탐색진행아체결손수복소괄의적파리섬유장장도화섬유함량。방법선택42과인정기발제완정적하합전마아，수궤분위A、B、C3개실험조，매조14과아。자유아골질계상2 mm절관후행완선적근관치료，진행장도예비，장도심도분별위A조10 mm、B조8 mm、C조6 mm。매개실험조재각분성2개아조，매조7과아。A1、B1、C1조응용섬유함량42%파리섬유장，A2、B2、C2조응용섬유함량75%파리섬유장，진행장점접、수지핵소형급금속관수복。장소유실험표본제성시건，치우만능재료실험궤상진행항절렬강도측시，기록아근절단시적순간압력치이급시건절단적모식。결과파리섬유장수복후적아체항절강도A조고우B조급C조，B조고우C조（균P<0.05）；섬유함량75%파리섬유장고우섬유함량42%파리섬유장（P<0.05）。결론용파리섬유장수복결손아체시，재일정범위내，장적장도월장，아체항절강도월대。섬유함량75%파리섬유장수복후아체항절강도대우섬유함량42%파리섬유장。
Objective To explore the influence of different lengths and contents of glass-fiber post on the fracture resistance of teeth, and to investigate the optimal length and content of glass-fiber post used for restorative treatment. Meth-ods Forty-two intact single canal mandibular premolars were collected from orthodontic patients and were divided into three experimental groups (A, B and C). All the teeth were endodontically treated after cut off the crowns from the 2 mm above cemento-enamel junction. The post lengths were10 mm in A group, 8 mm in B group, and 6 mm in C group.There were two subgroups for each experimental group (A1, A2, B1, B2, C1, C2 ), 7 teeth for each subgroup.The 42%glass fiber post was used in A1, B1 and C1 groups. The 75%glass fiber post was used in A2, B2 and C2 groups. All of groups were restored with resin cores and metal crowns. The fracture resistance was measured with universal testing machine and recorded the root frac-ture pressure data and the mode of all the teeth. Results The fracture resistance was significantly higher in group A than that of group B and group C (P<0.05), and the fracture resistance was significantly higher in group B than that of group C (P<0.05). The fracture resistance was significantly higher for 75%glass fiber post than that of 42%glass fiber post (P<0.05). Conclusion Within a certain range, the longer the length of glass fiber post, the greater the tooth fracture resistance. The fracture resistance of fiber content is better for 75%glass fiber post than that of 42%glass fiber post.
