Effect of restoration type on the stress distribution of endodontically treated maxillary premolars; Three-dimensional finite element study.
10.5395/JKACD.2009.34.1.008
- Author:
Heun Sook JUNG
1
;
Hyeon Cheol KIM
;
Bock HUR
;
Kwang Hoon KIM
;
Kwon SON
;
Jeong Kil PARK
Author Information
1. Department of Conservative dentistry, School of Dentistry, Pusan National University, Korea. jeongkil@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
Stress distribution;
Finite element analysis;
Endodontically treated teeth;
Restorative material;
Occlusal loading
- MeSH:
Bicuspid;
Ceramics;
Finite Element Analysis;
Humans;
Tooth Cervix
- From:Journal of Korean Academy of Conservative Dentistry
2009;34(1):8-19
- CountryRepublic of Korea
- Language:English
-
Abstract:
The purpose of this study was to investigate the effects of four restorative materials under various occlusal loading conditions on the stress distribution at the CEJ of buccal, palatal surface and central groove of occlusal surface of endodontically treated maxillary second premolar, using a 3D finte element analysis. A 3D finite element model of human maxillary second premolar was endodontically treated. After endodontic treatment, access cavity was filled with Amalgam, resin, ceramic or gold of different mechanical properties. A static 500N forces were applied at the buccal (Load-1) and palatal cusp (Load-2) and a static 170N forces were applied at the mesial marginal ridge and palatal cusp simultaneously as centric occlusion (Load-3). Under 3-type Loading condition, the value of tensile stress was analyzed after 4-type restoration at the CEJ of buccal and palatal surface and central groove of occlusal surface. Excessive high tensile stresses were observed along the palatal CEJ in Load-1 case and buccal CEJ in Load-2 in all of the restorations. There was no difference in magnitude of stress in relation to the type of restorations. Heavy tensile stress concentrations were observed around the loading point and along the central groove of occlusal surface in all of the restorations. There was slight difference in magnitude of stress between different types of restorations. High tensile stress concentrations around the loading points were observed and there was no difference in magnitude of stress between different types of restorations in Load-3.
