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通过有限元评估复合树脂收缩的洞腔大小、类型及充填技术。

Evaluation of cavity size, kind, and filling technique of composite shrinkage by finite element.

作者信息

Jafari Toloo, Alaghehmad Homayoon, Moodi Ehsan

机构信息

Department of Esthetic and Restorative Dentistry, Dental Materials Research Center, School of Dental, Babol University of Medical Sciences, Babol, Iran.

Dental Materials Research Center, Department of Esthetic and Restorative Dentistry, Dental School, Babol University of Medical Sciences, Babol, Iran.

出版信息

Dent Res J (Isfahan). 2018 Jan-Feb;15(1):33-39. doi: 10.4103/1735-3327.223617.

DOI:10.4103/1735-3327.223617
PMID:29497445
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5806428/
Abstract

BACKGROUND

Cavity preparation reduces the rigidity of tooth and its resistance to deformation. The purpose of this study was to evaluate the dimensional changes of the repaired teeth using two types of light cure composite and two methods of incremental and bulk filling by the use of finite element method.

MATERIALS AND METHODS

In this computerized experimental study, an intact maxillary premolar was scanned using cone beam computed tomography instrument (SCANORA, Switzerland), then each section of tooth image was transmitted to Ansys software using AUTOCAD. Then, eight sizes of cavity preparations and two methods of restoration (bulk and incremental) using two different types of composite resin materials (Heliomolar, Brilliant) were proposed on software and analysis was completed with Ansys software.

RESULTS

Dimensional change increased by widening and deepening of the cavities. It was also increased using Brilliant composite resin and incremental filling technique.

CONCLUSION

Increase in depth and type of filling technique has the greatest role of dimensional change after curing, but the type of composite resin does not have a significant role.

摘要

背景

窝洞预备会降低牙齿的刚性及其抗变形能力。本研究的目的是使用有限元方法评估使用两种光固化复合材料以及两种分层充填和整块充填方法修复牙齿后的尺寸变化。

材料与方法

在这项计算机实验研究中，使用锥形束计算机断层扫描仪器（瑞士SCANORA）对上颌完整前磨牙进行扫描，然后使用AUTOCAD将牙齿图像的每个截面传输到Ansys软件中。然后，在软件上提出了八种窝洞预备尺寸以及使用两种不同类型复合树脂材料（Heliomolar、Brilliant）的两种修复方法（整块充填和分层充填），并使用Ansys软件完成分析。

结果

尺寸变化随着窝洞的加宽和加深而增加。使用Brilliant复合树脂和分层充填技术时尺寸变化也会增加。

结论

固化后，深度增加和充填技术类型对尺寸变化的影响最大，但复合树脂类型的影响不显著。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/68a34a2ebac6/DRJ-15-33-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/d37b98b7768a/DRJ-15-33-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/061427f18244/DRJ-15-33-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/5ad0b4255f74/DRJ-15-33-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/94e4c35c59b2/DRJ-15-33-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/c56b5bf0c685/DRJ-15-33-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/0138ef208ffc/DRJ-15-33-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/68a34a2ebac6/DRJ-15-33-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/d37b98b7768a/DRJ-15-33-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/061427f18244/DRJ-15-33-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/5ad0b4255f74/DRJ-15-33-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/94e4c35c59b2/DRJ-15-33-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/c56b5bf0c685/DRJ-15-33-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/0138ef208ffc/DRJ-15-33-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b423/5806428/68a34a2ebac6/DRJ-15-33-g009.jpg

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