Effect of alveolar bone height and fiber post length on the fracture resistance of endodontically treated maxillary central incisors

doi:10.3969/j.issn.2095-4344.2014.43.013

Abstract

Abstract:

BACKGROUND: The elastic modulus of the fiber post is close to that of the dentine, so it can form a homogeneous whole and share the masticatory force, which can ease the stress concentration of dentine and prevent from tooth fracture.
OBJECTIVE: To investigate the effect of alveolar bone height and fiber post length on the fracture resistance of endodontically treated maxillary central incisors.
METHODS: Forty-eight human maxillary central incisors were assigned randomly to six groups (n=8) of three different post insertion depths (5, 7, 9 mm) and two alveolar bone levels (2 and 5 mm) from the cement-enamel junction. All of them were restored by glass fiber posts with composite resin core and cast metal crown. The samples were loaded in a testing machine with a crosshead speed of 1 mm/min at a 45° angle to the long axis of the tooth on the palatal surfaces until tooth fracture occurred. The maximum load and failure mode were recorded.
RESULTS AND CONCLUSION: Alveolar bone height had a significant influence on the fracture resistance (F=560.943, P > 0.05), but fiber post length did not have a significant influence on it (P > 0.05). Significant differences were found between the normal and resorbed alveolar bone groups in the number of repairable fracture patterns (χ2=5.689, P < 0.05). Under the circumstance of lowered alveolar bone height, lengthening fiber post cannot enhance fracture resistance of the teeth.

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

全文链接：

Key words: tooth, root canal therapy, post and core technique

CLC Number:

R318

Li Xiao-jie, Hu Shu-hai, Ren Xiang, Zuo En-jun. Effect of alveolar bone height and fiber post length on the fracture resistance of endodontically treated maxillary central incisors[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(43): 6966-6972.

Figures/Tables 3

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