Stress Concentration of Endodontically Treated Molars Restored with Transfixed Glass Fiber Post: 3D-Finite Element Analysis

被引:8
|
作者
Borges, Alexandre Luiz Souto [1 ]
Grangeiro, Manasses Tercio Vieira [1 ]
de Andrade, Guilherme Schmitt [1 ]
de Melo, Renata Marques [1 ]
Baroudi, Kusai [2 ]
Silva-Concilio, Lais Regiane [2 ]
Tribst, Joao Paulo Mendes [2 ]
机构
[1] Sao Paulo State Univ Unesp, Inst Sci & Technol, Dept Dent Mat & Prosthodont, BR-12245000 Sao Jose Dos Campos, SP, Brazil
[2] Univ Taubate UNITAU, Dept Dent, Grad Program Dent, BR-12020270 Taubate, SP, Brazil
关键词
dental restoration failure; endodontically treated teeth; finite element analysis; dental materials; FRACTURE-RESISTANCE; RESIN COMPOSITE; TEETH; RESTORATIONS; PREMOLARS; RECONSTRUCTION; STRENGTH; SURVIVAL; CAVITIES;
D O I
10.3390/ma14154249
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The loss of dental structure caused by endodontic treatment is responsible for a decrease in tooth resistance, which increases susceptibility to fracture. Therefore, it is important that minimally invasive treatments be performed to preserve the dental structure and increase the resistance to fracture of endodontically treated posterior teeth. To evaluate under axial loads, using the finite element method, the stress distribution in endodontically treated molars restored with both transfixed or vertical glass fiber posts (GFP) and resin composite. An endodontically treated molar 3D-model was analyzed using finite element analyses under four different conditions, class II resin composite (G1, control model), vertical glass fiber post (G2), transfixed glass fiber posts (G3) and vertical and transfixed glass fiber posts (G4). Ideal contacts were considered between restoration/resin composite and resin composite/tooth. An axial load (300 N) was applied to the occlusal surface. The resulting tensile stresses were calculated for the enamel and dentin tissue from five different viewports (occlusal, buccal, palatal, mesial and distal views). According to the stress maps, similar stress trends were observed, regardless of the glass fiber post treatment. In addition, for the G1 model (without GFP), a high-stress magnitude can be noticed in the proximal faces of enamel (7.7 to 14 MPa) and dentin (2.1 to 3.3 MPa) tissue. The use of transfixed glass fiber post is not indicated to reduce the stresses, under axial loads, in both enamel and dentin tissue in endodontically treated molar with a class II cavity.
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页数:11
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