机械热力清洗频率对牙科手机损耗及清洗效果的影响

Influence of frequency of machinery heating power cleaning on dental handpiece loss and cleaning effect

目的研究机械热力清洗频率对于牙科手机损耗以及清洗效果的影响。方法纳入180支可机械热力清洗的全新高速牙科手机,随机分为A、B、C 3组,每组60支。每次使用后,采用专用注油机进行清洗注油,包装灭菌。A、B、C组分别每周、每2周和每3周采用一次机械热力清洗后专用注油机清洗注油,包装灭菌的流程。在3、6、9个月时分别从每组随机抽取5支进行部件可视污渍情况检查,监测清洗效果。结果A、B、C 3组手机平均使用次数为A组(56.60±24.77)次,B组(49.70±30.08)次,C组(46.73±35.16)次,使用次数比较差异无统计学意义(P=0.800);9个月中15支手机出现故障,其中A组4支,B组7支,C组4支,3组比较差异无统计学意义(P=0.660);12支简单维修后继续使用,A组1支,B组7支,C组4支,3组比较差异无统计学意义(P=0.100);3支更换轴芯后继续使用,均为A组。3组清洁程度合格率均为100%。结论牙科手机在专用注油机清洗注油基础上每3周采用一次机械热力清洗能保障其内部清洁,并不会增加损耗,可提高工作效率。

Objective To explore the influence of frequency of machinery heating power cleaning on dental handpiece loss and cleaning effect.Methods This study selected 180 completely new high speed dental handpiece with machinery heating power cleaning.All of handpiece were randomly divided into group A,B and C,60 cases in each group.Cleaning,oiling by special oiling machine,packing and sterilizing were carried out for the dental handpiece after being used.Group A,B and C implemented the process including machinery heating power cleaning,cleaning and oiling by special oiling machine,packing as well as sterilizing weekly,every other week and every three weeks respectively.This study randomly extracted 5 cases in each group to check the visible stains and monitor the cleaning effects after 3,6 and 9 months.Results Among group A,B and C,the using times were(56.60±24.77),(49.70±30.08),and(46.73±35.16)respectively with no statistical difference(P=0.800).There were 15 dental handpiece with trouble in 9 months,4 in group A,7 in group B and 4 in group C with no statistical difference(P=0.660);12 of them could be continued use after simple repair,1 in group A,7 in group B and 4 in group C with no statistical differences(P=0.100);3 of them could be continued use after changing central spindle,all in group A.The pass rates of visible cleanliness were all 100%.Conclusions On the basis of cleaning and oiling by special oiling machine,machinery heating power cleaning every three weeks for dental handpiece can ensure the internal cleaning and improve working efficiency,but will not increase the loss.