关于经快速扫描二氧化碳激光辐照的牙釉质表面的黏附研究。
Adhesion studies on dental enamel surfaces irradiated by a rapidly scanned carbon dioxide laser.
作者信息
Chang Kwang K, Staninec Michal, Chan Kenneth H, Fried Daniel
机构信息
University of California, San Francisco, San Francisco, CA94143-0758.
出版信息
Proc SPIE Int Soc Opt Eng. 2011 Jan 1;7884. doi: 10.1117/12.878892.
In this study, we investigated the influence of different laser scanning patterns on the adhesive strength of laser irradiated enamel surfaces both with and without post ablation acid etching. Previous studies of dental enamel surfaces ablated by a rapidly scanned carbon dioxide laser indicated that the highly uniform smooth surfaces produced by the scanned laser beam yielded low bond strength and acid etching was required in order to attain a high bond strength. However, since the enamel surface after ablation by CO(2) lasers is more resistant to acid dissolution it is desirable to avoid acid etching before bonding. The overlap between adjacent laser spots was varied to modify the effective surface roughness. In addition, small retention holes were drilled at higher laser intensity with varying spacing to increase the adhesive strength without acid etching. Varying the degree of overlap between adjacent laser spots did not significantly influence the bond strength with post ablation acid etching. The bond strength was significantly higher without acid etching with retention holes spaced 250-µm apart.
在本研究中，我们调查了不同激光扫描模式对激光照射牙釉质表面粘结强度的影响，这些表面有或没有进行烧蚀后酸蚀处理。先前关于用快速扫描二氧化碳激光烧蚀牙釉质表面的研究表明，扫描激光束产生的高度均匀光滑表面产生的粘结强度较低，为了获得高粘结强度需要进行酸蚀。然而，由于二氧化碳激光烧蚀后的牙釉质表面对酸溶解更具抗性，因此希望在粘结前避免酸蚀。改变相邻激光光斑之间的重叠度以改变有效表面粗糙度。此外，在较高激光强度下以不同间距钻出小的固位孔，以在不进行酸蚀的情况下提高粘结强度。改变相邻激光光斑之间的重叠度对烧蚀后酸蚀处理的粘结强度没有显著影响。在不进行酸蚀且固位孔间距为250微米的情况下，粘结强度显著更高。
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