查詢結果分析
來源資料
頁籤選單縮合
題名 | 牙齒-複合樹脂抗拉結合強度測試法的再評估--二維與三維有限元素分析=Reevaluation of Tooth-Composite Resin Tensile Bond Test--2D and 3D Finite Element Analysis |
---|---|
作者姓名(中文) | 劉鎮彰; 林俊彬; 王若松; 連雙喜; 謝季全; | 書刊名 | 中華醫學工程學刊 |
卷期 | 17:3 1997.09[民86.09] |
頁次 | 頁199-206 |
分類號 | 416.98 |
關鍵詞 | 抗拉結合強度; 牙齒-複合樹脂結合; 有限元素分析; 彈性模量; Tensile bond test; Tooth-composite resin bonding; Finite element analysis; Elastic modulus; |
語文 | 中文(Chinese) |
中文摘要 | 近年來,由於牙科黏著劑的發展,使得牙科醫療的技術有長足的進步。牙科複合 樹脂和牙齒硬組織之間的結合性質常以傳統的抗拉結合強度來表示,但以此測試方法量測結 合界面強度的適用性仍廣受質疑。本研究引用有限元素分析方法,利用二維及三維有限元素 模型來探討牙科複合樹脂結合到牙齒的試片進行抗拉結合強度試驗時,其受力後應力分佈狀 況,以評估此傳統測驗方法之基礎理論在量測結合界面強度上的適用性。結果顯示結合面上 之正向應力、最大主應力及 von Mises 應力在試片上皆有應力集中現象。 在結合界面上每 一點都有不同強度的應力分佈,模糊了傳統以名義上抗拉強度作為評估界面結合強度的適用 性;顯示出牙科傳統牙齒與複合樹脂結合界面抗拉結合強度的測試方法,並不能真正反應出 結合界面上機械性質及結合機轉。三維模型之應力分析是必須的。另外,彈性模量的改變對 試片應力分佈亦有影響。牙齒端的彈性模量增加,會降低抗拉結合強度試片的應力集中效應 ;複合樹脂端的彈性模量增加則會提高抗拉結合強度試片的應力集中效應。因此,唯有建立 一種合乎基礎理論的標準結合強度測試法,才能深入探討複合樹脂與牙齒之結合機轉,進而 發展新一代之牙齒黏著劑,並提昇臨床黏著牙醫學之技術。 |
英文摘要 | Adhesion of dental materials to tooth structures has been a goal of dental researchers for many years. The benefits of composite resin-tooth bond are: restoration retention, elimination of marginal leakage, and reinforcement of remaining tooth structures. Most studies in the literature have used tensile bond strength as a measure of the stress at failure between the composite resin and the dental hard tissues. However, results from tensile bond test very greatly and may not accurately reflect the characteristics of a bond. The purpose of this study was to reevaluate the the theoretical basis of the tensile bond test used in dentistry by 2 dimensional as well as 3 dimensional finite element analysis. All models were analyzed using the MARC finite element program on a Silicon Graphics workstation. The results showed that nonuniform stress distributions of normal stress on bonding plane, maximum principal stress and von Mises stress at the interface between the composite resin and tooth were produced. The changes in elastic modulus of bonded materials will affect the degrees of stress concentrations. The higher the elastic modulus of tooth, the lower the stress concentration at the margin of interface; the higher the elastic modulus of composite resin, the higher the stress concentration at the margin of interface. For a cylinder-shaped bonded specimen, 3 dimensional finite element model is preferred to analyze the values and patterns of stress concentrations. In conclusion, the tensile bond test used in dentistry may not reflect the actual mechanical properties of an interface, because it is highly sensitive to the local conditions of the test arrangement and the materials involved. Therefore, there is a need to design a new standardized testing method for shedding light on the mechanism of adhesion as well as leading the way to new tgenerations of adhesive dental materials. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。