一种新型聚合物渗透陶瓷牙科材料。
A novel polymer infiltrated ceramic dental material.
机构信息
Sir John Walsh Research Institute, School of Dentistry, University of Otago, Dunedin, New Zealand.
出版信息
Dent Mater. 2011 Jun;27(6):527-34. doi: 10.1016/j.dental.2011.02.002. Epub 2011 Mar 2.
OBJECTIVES
To evaluate the mechanical behavior of a prototype porous ceramic interpenetrating polymer-ceramic material containing 15-20% polymer.
METHODS
After sample preparation, elastic modulus, hardness, stress-strain relationship and indentation creep response were measured by a nanoindentation system. Fracture toughness was measured by the single-edge-notched beam (SENB) method. SEM was employed to observe the fractured surface and analyze the fracture mechanisms.
RESULTS
The polymer infiltrated ceramic material has elastic modulus, hardness, and fracture toughness values of 30.14GPa, 2.59GPa, and 1.72 MPam(1/2), respectively. The material illustrates a significant indentation size effect for elastic modulus and hardness, and has similar indentation creep behavior to human enamel. Manufacturing procedures such as the density of pre-infiltrated porous ceramic and processing pressure influence the final properties of the material.
SIGNIFICANCE
This polymer infiltrated ceramic material is anticipated to become a new member of the dental CAD/CAM family.
目的
评估一种含有 15-20%聚合物的原型多孔陶瓷互穿聚合物陶瓷材料的力学性能。
方法
在样品制备后，通过纳米压痕系统测量弹性模量、硬度、应力-应变关系和压痕蠕变响应。通过单边切口梁（SENB）法测量断裂韧性。SEM 用于观察断裂表面并分析断裂机制。
结果
聚合物渗透陶瓷材料的弹性模量、硬度和断裂韧性值分别为 30.14GPa、2.59GPa 和 1.72MPam(1/2)。该材料的弹性模量和硬度具有明显的压痕尺寸效应，且压痕蠕变行为与人牙釉质相似。预制渗透多孔陶瓷的密度和加工压力等制造工艺会影响材料的最终性能。
意义
这种聚合物渗透陶瓷材料有望成为牙科 CAD/CAM 家族的新成员。
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