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首页> 外文期刊>Journal of Pharmacy and Bioallied Sciences >Comparative Study on Fracture Resistance of Endodontically Treated Tooth in Relation to Variable Ferrule Heights Using Custom-made and Prefabricated Post and Core: An In Vitro Study
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Comparative Study on Fracture Resistance of Endodontically Treated Tooth in Relation to Variable Ferrule Heights Using Custom-made and Prefabricated Post and Core: An In Vitro Study

机译：使用定制和预制岗位和核心骨质处理牙齿与可变套圈高度相关性骨折的比较研究：体外研究

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Endodontically treated teeth have significantly differentphysical properties compared to vital teeth. To ensure functional longevity,endodontically treated teeth must have at least 5 mm of tooth structure coronalto the crestal bone, 2 mm of coronal tooth structure incisal to the preparationfinish line are necessary to ensure functional integrity.Aim and Objectives:To evaluate fracture resistance of endodontically treated teeth restored withcustom cast post, custom cast post with variable ferrule height and teethwithout ferrule, prefabricated post with variable ferrule height and teethwithout ferrule. To compare fracture resistance of teeth restored with customcast post and prefabricated post with variable ferrule heights.Materials and Methods:Methodology includes selection of teeth, root canal preparation,post space preparation, grouping of samples, Group A–custom cast post andcore with sub groups of variable ferrule height, pattern fabrication, Group A- pattern fabrication for customized cast post. Group B–pattern fabricationfor prefabricated post and core, investing and casting, cementation, custommade acrylic jig preparation, testing of specimens.Results:The differencein the fracture load between the samples of Group A was highly significantat the 0.001 level. Subgroup A4 had highest fracture resistance while GroupA, possessed the least fracture resistance. Subgroups A2, A3 had fractureresistance value intermediate between A1, A4.Conclusion:Increasing theferrule height significantly increases (P < 0.001) the fracture resistance ofendodontically treated teeth restored with both custom made cast post andcore and prefabricated post with metal core. Comparatively the custom madecast post and core with variable ferrule height, especially 2 mm ferrule showedsignificant fracture resistance than prefabricated post with metal core. Thepresence of 2 mm ferrule height significantly increases (P < 0.001).
机译：与生命的牙齿相比，牙髓处理的牙齿具有显着差异性的特性。为了确保功能性寿命，脊髓处理的牙齿必须具有至少5mm的牙齿结构冠状骨骼，2毫米的冠状齿结构对准备的牙齿结构切口是必要的，以确保功能完整性。肢体和目标：以评估胸腔的骨折性经过处理的牙齿恢复铲斗铸造柱，定制铸造柱，带有可变套圈高度和牙线套管，预制柱，可变套圈高度和牙齿缠绕套圈。比较用自定义型柱和预制柱的牙齿的骨折抗性，具有可变套圈高度。材料和方法：方法包括牙齿的选择，根管准备，后空间准备，样本分组，分组与子组的自定义铸造术后和探针组可变套圈高度，图案制造，分组用于定制铸造柱的图案制造。本集团B形型制品预制岗位和核心，投资和铸造，胶粘，粘合，定制丙烯酸夹具制剂，试样检测。结果：差异差异突出的裂缝载荷高于0.001水平。亚组A4具有最高的抗断裂性，而Groupa，具有最小的骨折性。亚组A2，A3具有A1，A4之间的骨折值中间体中间体。结论：增加的抗动性高度显着增加（P <0.001）骨折抗性处理的牙齿恢复，用金属芯的预制铸造术后恢复。相比之下，具有可变套圈高度的自定义Madecast柱和核心，特别是2 mm套圈表现出比金属芯预制柱的显着裂缝抗性。 2 mm套圈高度的假期显着增加（P <0.001）。

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