激光对两种贱金属合金粘结陶瓷抗剪粘结强度影响的比较评估：一项体外研究。

Comparative evaluation of effect of laser on shear bond strength of ceramic bonded with two base metal alloys: an in-vitro study.

作者信息

Deepak K, Ahila S C, Muthukumar B, Vasanthkumar M

机构信息

Departments of Prosthodontics, SRM Dental College, Ramapuram, Chennai, Tamil Nadu, India.

出版信息

Indian J Dent Res. 2013 Sep-Oct;24(5):610-5. doi: 10.4103/0970-9290.123396.

DOI:10.4103/0970-9290.123396

PMID:24355964

Abstract

UNLABELLED

The most common clinical failure in metal ceramic restoration is at the ceramo-metal interface. For the clinical longevity, metal-ceramic prostheses must have satisfactory bond strength between metal and ceramic.

AIM AND OBJECTIVE

The aim of this study is to evaluate the effect of Laser etching on shear bond strength between base metal alloys and ceramic.

MATERIALS AND METHODS

A total of 60 specimens were made (Base 5 mm diameter and 1 mm thickness, step with 4 mm diameter and 4 mm in length). They were divided into three groups. Group A-control, Group B-sand blasting, and Group C-laser etching. The Surface morphology, surface roughness, and wettability of the specimens were observed under scanning electron microscope (SEM) Ceramic application was carried out layer by layer for an optimal height of 4 mm. The shear bond strength test was performed using a universal testing machine and the nature of the fracture was examined under SEM.

RESULTS

The mean shear bond strength values for laser etched (Group C) Nickel-chromium (Ni-Cr) alloy bonded with ceramic was (49.12 ± 7.12 MPa) and ceramic bonded with Cobalt-chromium (Co-Cr) was (50.04 ± 4.27 MPa), sand blasted (Group B) Ni-Cr alloy bonded with ceramic was (26.00 ± 5.22 MPa), and ceramic bonded with Co-Cr was 24.54 ± 4.78 MPa. The SEM image after debonding showed 10% of adhesive failure and 70% cohesive failure and 20% of both adhesive and cohesive failure for Laser etching. However, there was no significant difference in the values of shear bond strength between the two base metal alloys in Group C.

CONCLUSION

The s hear bond strength between ceramic bonded with Ni-Cr alloys using the Laser etching as surface treatment was 49.12 ± 7.12 MPa and for Co-Cr alloys 50.04 ± 4.27 MPa. Laser surface treatment produces an excellent surface roughness and achieved good shear bond strength values and aid in achieving a better bond strength between metals and ceramic.

摘要

未标注

金属烤瓷修复体最常见的临床失败情况发生在烤瓷与金属的界面处。为了保证临床使用寿命，金属烤瓷修复体必须在金属和陶瓷之间具有令人满意的结合强度。

目的

本研究旨在评估激光蚀刻对贱金属合金与陶瓷之间剪切结合强度的影响。

材料与方法

共制作60个试件（底部直径5毫米、厚度1毫米，台阶直径4毫米、长度4毫米）。将它们分为三组。A组为对照组，B组为喷砂处理组，C组为激光蚀刻组。在扫描电子显微镜（SEM）下观察试件的表面形态、表面粗糙度和润湿性。陶瓷逐层施加，达到4毫米的最佳高度。使用万能试验机进行剪切结合强度测试，并在SEM下检查断裂性质。

结果

激光蚀刻（C组）的镍铬（Ni-Cr）合金与陶瓷结合的平均剪切结合强度值为（49.12±7.12兆帕），钴铬（Co-Cr）合金与陶瓷结合的为（50.04±4.27兆帕）；喷砂处理（B组）的Ni-Cr合金与陶瓷结合的为（26.00±5.22兆帕），Co-Cr合金与陶瓷结合的为24.54±4.78兆帕。脱粘后的SEM图像显示，激光蚀刻组有10%的粘结失败、70%的内聚破坏以及20%的粘结和内聚混合破坏。然而，C组中两种贱金属合金的剪切结合强度值没有显著差异。