摘要
目的相比以前一些模型,蛋白质-矿物质多孔力学模型被验证可以提供更精确的生物材料性质评价。因此,本文对牙本质微结构相互作用对其材料性质的影响进行了重新评价。方法采用蛋白质-矿物质多孔力学模型,讨论了牙小管、管周基质和管间基质相互作用对牙本质微结构性质的影响。结果通过分析发现,牙本质微结构力学性质依赖于牙小管的方向和牙小管中的压力值;同时,牙本质微结构力学性质会随着年龄以及管周基质与管间基质的蛋白质和矿物质分布而改变。结论文章中的理论分析和讨论说明牙小管、管周基质和管间基质相互作用对牙本质微结构性质有一定的影响,说明蛋白质-矿物质多孔力学模型的有效性,以及不考虑相互作用的微结构力学模型具有一定的局限性。
Objective It is demostrated that the porous protein-mineral mechanics model could provide more accurate prediction for biomaterial properties of dentine compared with the other established models.This paper would use the model to reevaluate the mechanical properties and its interacting mechanism of human dentine.Method By using a porous proteinmineral mechanics model,the effect from the interactions between tubules,peritubular and intertubular matrix on dentine microstructure was discussed.Results The dentinal micromechanical properties were dependent on the tubular direction,and the absolute values of the stresses derived from the hydraulic and gas tubular pressures increased parabolically with the increasing diameter of the tubules.It was also found that the effective elastic constants of the dentine microstructure would vary with the aging and the distribution of mineral and collagen within peritubular and intertubular matrix of detine.Conclusions The theoretical analyses provided in this paper demonstrated that the microstructural characteristics of tubules,peritubular and intertubular dentinal matrix could have different influences on the micromechanical properties of human dentine,which showed the validity of porous protein-mineral mechanics model,and the limitation of some models that neglected the interacting mechanism.
出处
《医用生物力学》
EI
CAS
CSCD
2011年第2期181-188,共8页
Journal of Medical Biomechanics
基金
国家自然科学基金资助项目(308706060)
关键词
力学性质
牙本质
微结构
重新评价
Mechanical properties
Dental materials
Microstructure
Reevaluation
