Fracture resistance and stress distribution of weakened teeth reinforced with a bundled glass fiber-reinforced resin post

被引:17
作者
Alves Santos, Thais da Silva [1 ]
Abu Hasna, Amjad [1 ]
Abreu, Ricardo Toledo [1 ]
Tribst, Joao Paulo Mendes [2 ]
de Andrade, Guilherme Schmitt [2 ]
Borges, Alexandre Luiz Souto [2 ]
Torres, Carlos Rocha Gomes [3 ]
Carvalho, Claudio Antonio Talge [1 ]
机构
[1] Sao Paulo State Univ UNESP, Inst Sci & Technol, Endodont Div, Dept Restorat Dent, Av Francisco Jose Longo 777, BR-12245000 Sao Jose Dos Campos, SP, Brazil
[2] Sao Paulo State Univ UNESP, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, Brazil
[3] Sao Paulo State Univ UNESP, Inst Sci & Technol, Operat Dent Div, Dept Restorat Dent, Sao Jose Dos Campos, Brazil
关键词
Fracture resistance; Stress distribution; Glass fiber post; ENDODONTICALLY TREATED TEETH; CALCIUM HYDROXIDE; BOND STRENGTH; DENTIN; PREMOLARS; BEHAVIOR; SYSTEM; CORES; METAL; MODE;
D O I
10.1007/s00784-021-04148-4
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objectives To make an in vitro assessment of fracture resistance of weakened and non-weakened teeth receiving intraradicular reinforcement using Rebilda bundled glass fiber-reinforced composite posts (GT), Rebilda conventional glass fiber posts (RP), or both systems combined (GT + RP). Materials and methods Eighty sound bovine incisors were prepared and divided randomly into eight groups as follows: (a) nWnR: without simulating weakness, and without intraradicular reinforcement; (b) WnR: simulating weakness, but without intraradicular reinforcement; (c) nWGT: without simulating weakness, but with GT; (d) WGT: simulating weakness, and with GT; (e) nWRP: without simulating weakness, but with RP; (f) WRP: simulating weakness, and with RP; (g) nWGTRP: without simulating weakness, but with GT + RP; (h) WGTRP: simulating weakness, and with GT + RP. The specimens were subjected to the load-to-fracture test using the DL-2000MF universal testing machine. The finite element method assessed the mechanical behavior and stress distribution in endodontically treated teeth. Results The groups nWGTRP and WGTRP presented the best results in the load-to-fracture test, with the former being better than the latter, but with no statistically significant difference (P > 0.05). However, there was a significant difference between these and the other groups (P < 0.05), except for nWRP. Stress distribution inside the canal wall was different among the groups, with promising mechanical behavior for nWGTRP and nWRP. Conclusions The Rebilda conventional fiber post (RP), combined with the Rebilda bundled glass fiber-reinforced composite post (GT) improves the resistance and stress distribution of immature teeth.
引用
收藏
页码:1725 / 1735
页数:11
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