目的：比较长正中、半解剖、平面(牙合)3种(牙合)型全口义齿的咀嚼效率。方法：收集刃状、低平或凹型牙槽嵴患者60例，随机分成3组，分别用长正中(牙合)型、半解剖(牙合)型与平面(牙合)型人工牙制作全口义齿（n ＝20）。采用固定咀嚼时间和咀嚼次数2种方法，测定患者戴牙1、2、3、6个月后的咀嚼效率，比较三者的咀嚼效率。SPSS 22．0软件包对数据进行统计学分析。结果：长正中(牙合)型、半解剖(牙合)型全口义齿咀嚼效率无显著差异（P ＞0．05），长正中(牙合)型全口义齿的咀嚼效率明显高于平面(牙合)型全口义齿（P ＜0．05）。结论：对于刃状、低平、凹陷状牙槽嵴条件的无牙(牙合)患者，长正中(牙合)全口义齿能恢复良好的咀嚼效能。%Objective:To compare the masticatory efficiency of long-centric,semi-anatomical and cuspless occlusal complete den-tures.Methods:60 cases with flat or depressed residual ridges were randomly divided into 3 groups(n =20)and treated with long-centric,semi-anatomical and cuspless occlusal complete dentures,respectively.The masticatory efficiency was compared among 3 groups in different period(1,2,3 and 6 month)after wearing the dentures.SPSS 22.0 software package was used for data analysis. Results:There was no significant difference between long-centric occlusal and semi-anatomaical occlusal complete dentures(P >0.05)in 30 s chewing and for 40 times'chewing.The masticatory efficiency of the long-centric pattern was significantly higher than that of the cuspless pattern(P <0.05).Conclusion:Long centric occlusal complete denture can achieve satisfactory masticatory effi-ciency for edentulous patients with flat or depressed residual ridges.
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