鈦合金支台齒與二氧化鋯支台齒抵抗斷裂強度能力與其失敗模式之研究

中國醫藥大學機構典藏 China Medical University Repository, Taiwan > 牙醫學院 > 牙醫學系暨碩博士班、口腔醫學產業碩士班 > 博碩士論文 > Item 310903500/41295

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题名:	鈦合金支台齒與二氧化鋯支台齒抵抗斷裂強度能力與其失敗模式之研究 A Comparison of Fracture Resistance and Failure Modes of the Implant-Abutment interface between Titanium alloy and Zirconia Abutments
作者:	王瓊芳
贡献者:	牙醫學系碩士班
关键词:	人工植體;鈦合金支台齒;二氧化鋯支台齒;斷裂強度;失敗模式 dental implant;titanium alloy abutment;zirconia abutment;fracture force;failure mode
日期:	2011-09-06
上传时间:	2011-10-17 16:21:03 (UTC+8)
出版者:	中國醫藥大學
摘要:	研究目的：二氧化鋯支台齒具有美觀的優點，但是其易脆的性質及機械強度是否足以承受口腔中的力量仍是大家擔心的地方，因此本研究的目的欲比較二氧化鋯支台齒與鈦合金支台齒在斜向壓力下，人工植體-支台齒相對不同高度情況下抵抗斷裂的強度與失敗模式。材料與方法：將18支人工植體分成兩部分：第一部份(模擬骨脊流失3.0公厘)與第二部份(模擬骨脊流失1.5公厘)。第一部份(樣本數各為6)和第二部份(樣本數各為3)各分成兩小組，第一小組為鈦合金支台齒，第二小組為二氧化鋯支台齒。測試前後以掃描式電子顯微鏡(JEOL, JSM 5400, Japan)觀察人工植體與支台齒的介面，每組的最大變形力量與抵抗斷裂強度以材料測試機(AG-IC, Shimadzu, Japan)作測試。實驗數據以無母數統計(Mann–Whitney)分析。實驗結果：實驗第一部分: 第一小組(模擬骨脊流失3.0公厘，鈦合金支台齒)的最大變形力量和抵抗斷裂強度分別是548.7 N 和734.5N (平均值)，第二小組(模擬骨脊流失3.0公厘，二氧化鋯支台齒)的最大變形力量和抵抗斷裂強度分別是550.7 N 和908.5 N (平均值)。實驗第二部分: 第一小組(模擬骨脊流失1.5公厘，鈦合金支台齒)的最大變形力量和抵抗斷裂強度分別是1114.2 N 和1292.1 N (平均值)，第二小組(模擬骨脊流失1.5公厘，二氧化鋯支台齒)的最大變形力量和抵抗斷裂強度分別是998.3 N 和1220.7 N (平均值)。對於最大變形力量的分析，第二部份的鈦合金支台齒和二氧化鋯支台齒有統計上的差異但是第一部份則無統計上的差異。而對於抵抗斷裂強度，第一部分和第二部份的組別皆沒有統計上的差異。結論：根據本實驗的結果，骨流失越嚴重，則最大變形力量與抵抗斷裂強度越小。但是所有二氧化鋯支台齒及鈦合金支台齒測試樣本皆具有足以承受文獻上提出的前牙生理性咬合力量之能力。在模擬骨流失1.5公厘下，最大變形力量受到支台齒材料的影響。 Purpose: It was known as optimal aesthetics for zirconia materials, however, they are brittle and concerns remain regarding the mechanical properties to withstand forces in the oral cavity. Therefore, the purpose of this study was to compare the fracture strength and failure mode of titanium alloy and zirconia abutments under oblique compressive forces with different relatively implant-abutment levels. Materials and Methods: Eighteen implants were divided into two parts: part 1 (simulating bone loss of 3.0 mm) and part 2 (simulating bone loss of 1.5 mm). Part 1 and 2 were divided into two subgroups of six implants and three implants each (1 with titanium alloy abutments, 2 with zirconia abutments). Before and after testing, each implant-abutment assembly was observed with scanning electron microscope (SEM) (JEOL, JSM 5400, Japan). The maximum deformation force and fracture force of each sample was determined in a universal testing machine (AG-IC, Shimadzu, Japan). The data were analyzed with the nonparametric test (Mann–Whitney). Results: The mean maximum deformation force and fracture force obtained for the part 1 were: subgroup 1 (simulating of bone loss 3.0 mm, titanium alloy abutments) = 548.7 N, 734.5 N (mean); subgroup 2 (simulating of bone loss 3.0 mm, zirconia abutments) = 550.7 N, 908.5 N (mean); part 2, subgroup 1 (simulating of bone loss 1.5 mm, titanium alloy abutments) = 1114.2 N, 1292.1 N (mean); subgroup 2 (simulating of bone loss 1.5 mm, zirconia abutments) = 998.3 N, 1220.7 N (mean). For maximum deformation force in part 2, there was significant difference between subgroup 1 vs. 2, but no significant difference between subgroup 1 vs. 2 in part 1. Fracture forces were no different between subgroup 1 vs. 2 in part 1 and part 2. Conclusion: Based on the experimental results, the more marginal bone support was lost, the less maximum deformation force and fracture force were obtained, but all tested implant-abutment assemblies could withstand physiological occlusal forces applied in the anterior region. For simulating of peri-implant bone loss of 1.5 mm, materials of abutments would affect the performance of maximum deformation force.
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