Relationship between mechanical properties of fiber resin post-core system and different dental remaining tissues

doi:10.3969/j.issn.2095-4344.2015.25.020

Abstract

Abstract:

BACKGROUND: The dental remaining tissue is closely related to fracture resistance ability of the fiber resin post.
OBJECTIVE: To compare the effect of different dental remaining tissues on fatigue resistance of the fiber resin post using in vitro stress analysis method.
METHODS: A total of 36 single rooted mandibular premolars were randomly divided into four groups. Upon finishing standardized root canal therapy, tooth preparation was performed on all four groups. Group A: transverse grinding of the crown on datum plane. Group B: coronal oblique distal, middle and proximal defects with the dentin collar height of 2 mm at the distal end, and dentin collar height of 0 mm when gradually reduced to the proximal end. Group C: transverse missing of dental crown, leaving healthy dentin with 2 mm. Group D: retention of complete dental tissues on the dental crown. Routine bonding treatment was performed after the preparation in each group, and the Para post fiber lux glass fiber post was then implanted. Dynamic mechanical loading equipment was used to analyze the fracture resistance value of the four groups.
RESULTS AND CONCLUSION: The loading value was as follows: Group D > Group C > Group B > Group A, and significant differences were found between two groups (P < 0.05). The four model fracture forms were as follows: coronal oblique fracture, dental cervix transverse fracture, tooth cervical oblique fracture and root fracture. In the Group A, there were seven cases of dental cervix transverse fracture and two cases of oblique fracture. In the Group B, there were four cases of coronal oblique fracture and five cases of oblique fracture of dental cervix. In the Group C, there were six cases of oblique fracture of dental cervix and three cases of root fracture. In the Group D, there were seven cases of oblique fracture of dental cervix and two cases of root fracture. The result explains that the occlusal stress will be transferred from cervix to the root when there are enough remaining dental tissues; overall levels reduce, and the strength of fiber post increases. Therefore, it is suggested clinically to save as much dental tissues as possible.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Post and Core Technique, Dental Stress Analysis, Dental Prosthesis

CLC Number:

R318

Nulipa•Abulai, Tuerhongayi•Taxifulati, Gu Min, Dilinuer•Aji. Relationship between mechanical properties of fiber resin post-core system and different dental remaining tissues [J]. Chinese Journal of Tissue Engineering Research, 2015, 19(25): 4038-4042.

Figures/Tables 2

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