Er∶YAG激光、渗透树脂和微研磨治疗釉质脱矿的效果对比

Comparison of Er∶YAG Laser,Resin Infiltrating,and Micro-grinding in Treatment of Enamel Demineralization

曹璇璇 ¹姜丹丹 ²仵楠 ²周政 ²代海涛²

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作者信息

1. 石河子大学医学院新疆石河子 832000
2. 石河子大学第一附属医院口腔科新疆石河子 832000
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摘要

目的:对比分析Er∶YAG激光、渗透树脂和微研磨治疗釉质脱矿的效果.方法:按照纳排标准选取临床上拔除的新鲜前磨牙48颗,建立体外釉质脱矿模型后,将其随机分为4组:A组为对照组,不作任何处理;B组为微研磨组,对样本进行微研磨处理后表面涂氟;C组为渗透树脂组,样本使用渗透树脂处理;D组为Er∶YAG激光组,对样本进行激光照射后表面涂氟;处理完毕后4组样本均浸泡于人工唾液中(每日更换1次),21 d后对4组样本进行二次脱矿处理.分别测量各组处理前(t0)、脱矿后(t1)、治疗处理后(t2)以及二次脱矿处理后(t3)釉质表面的显微硬度和粗糙度,分别通过肉眼和扫描电镜观察样本的治疗效果及表面结构.结果:(1)t0与t1时,4组之间牙釉质显微硬度比较无显著性差异(P＞0.05);t2、t3时,C组显微硬度值最大,其次为D组、B组,A组最小;除C组与D组外,其余组间比较差异均有显著性意义(P＜0.01);t3时,A组显微硬度值低于t1(P＜0.01),其余3组高于t1(P＜0.01);(2)t0与t1时,各组之间牙釉质表面粗糙度比较无显著性差异(P＞0.05);t2、t3时,C组粗糙度值最小,其次为D组、B组,A组最大;各组之间比较差异均有显著性意义(P＜0.01);(3)样本肉眼观察仅C组色泽基本正常;(4)扫描电镜观察发现B、C、D组较A组牙釉质表面空隙明显减少,平滑度也有不同程度的改善.结论:渗透树脂在改善脱矿釉质表面的粗糙度方面优于激光照射;在提高显微硬度效果和抗脱矿稳定性方面明显优于微研磨.

Abstract

Objective:To compare and analyze the effects of Er∶YAG laser,resin infiltration,and micro-grinding on tooth enamel demineralization.Methods:Forty-eight clinically extracted fresh premolars were collected and ran-domly divided into four groups after establishing artificial demineralization model.Group A was control group.Group B was micro-grinding group.Group C was permeable resin group.And group D was laser group.After 21 days,the four groups of isolated teeth were subjected to secondary demineralization.The microhardness and rough-ness of enamel surface was measured before treatment(t0),after demineralization(t1),after treatment(t2),and after secondary demineralization(t3).The treatment effect and surface structure of samples were observed by naked eyes and scanning electron microscope.Results:(1)At to and t1,there was no significant difference in enamel mi-crohardness among four groups(P＞0.05).At t2 and t3,the microhardness of group C was the largest,followed by group D and group B,and group A was the smallest.Except for group C and group D,there were significant differences among other groups(P＜0.01).At t3,the microhardness of group A was lower than that at t1(P＜0.01),while those of groups B,C,and D were higher than that at t1(P＜0.01).(2)There was no significant difference in enamel surface roughness between groups at t0 and t1(P＞0.05).At t2 and t3,the roughness value of group C was the smallest,followed by group D and group B,and group A was the largest.There were significant differ-ences among all groups(P＜0.01).(3)Only the color of group C was basically normal observed by naked eye.(4)SEM observation showed that the surface voids of enamel in groups B,C,and D were significantly reduced com-pared with that in group A,and the smoothness was also improved.Conclusion:Resin infiltrated is superior to laser irradiation in improving the surface roughness of demineralized enamel,and obviously better than micro-grinding in improving the microhardness and anti-demineralization stability.

关键词

釉质脱矿/渗透树脂/微研磨/激光

Key words

demineralization of enamel/resin infiltration/micro-grinding/laser

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基金项目

石河子大学第一附属医院青年基金(QN202102)

出版年

2024

口腔医学研究

武汉大学口腔医学院

口腔医学研究

CSTPCDCSCD北大核心

影响因子：0.48

ISSN：1671-7651

参考文献量22

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