重量法测量121例正常错咀嚼效能的研究

Masticatory efficacy in the individuals with normal occlusion and in those with malocclusion examined by weight measuring

目的:比较正常(牙合)不同年龄、性别的咀嚼效能;正常(牙合)与错(牙合)不同年龄、性别咀嚼效能的差异.方法:重量法分别测算出121 例11～16 岁及21～25 岁正常(牙合)与错(牙合)咀嚼值.121 例中48 例正常(牙合),73例包括上颌前突、前牙反(牙合)、拥挤在内的错(牙合).用SPSS 10.0统计软件的独立样本t检验(2 样本资料的均数比较,即成组t检验)对有关组分别进行比较.结果:21～25 岁男女正常(牙合)平均咀嚼值之间,男性咀嚼值远远高于女性的咀嚼值,P=0.000,有高度显著性差异;不同年龄咀嚼值的差异在男性表现明显:21～25 岁男性正常(牙合)的平均咀嚼值明显高于11～16 岁男性正常(牙合)的平均咀嚼值,P<0.01,差异有高度显著性;11～16 岁男性中前牙反(牙合)的平均咀嚼值低于正常(牙合)的平均咀嚼值,P<0.05,差异有显著性;21～25 岁女性中上颌前突的平均咀嚼值比正常(牙合)的平均咀嚼高,P<0.05, 有显著性差异;21～25 岁女性中前牙拥挤的平均咀嚼值比正常(牙合)的平均咀嚼值高,P<0.05, 有显著性差异.结论:青年男性咀嚼效能远远高于女性的咀嚼效能; 青年男性正常(牙合)咀嚼效能明显高于青少年男性正常(牙合)的咀嚼效能; 青少年男性前牙反(牙合)的咀嚼效能低于青少年男性正常(牙合)的咀嚼效能;青年女性中上颌前突和拥挤的咀嚼效能高于正常(牙合)的咀嚼效能.

Objective：To compare the difference of average masticatory performance in the subjects with normal occlusion and in those with malocclusion. Methods ： Using weight measuring method masticatory performance was studied in 48 cases with normal occlusion and 73 cases with malocclusion including maxillary protrusion,anterior crossbit and crowding. The subjects were 11 - 16 and 21 - 25 years old. The data were analyzed by Independent-Samples t test of SPSS 10.0 software. Results：The average masticatory performance（ % ） in the male and female of 21 -25 years old with normal occlusion was 92.16 and 82.97 respectively（ P = 0. 000）. The difference of masticatory performance was significant in males with normal occlusion between 11 - 16 and 21 - 25 years old（ P 〈 0.01 ）. The masticatory performance in the 11 - 16 year old males with antirior crossbit （67.06） was lower than that with normal occlusion （P = 0.02 ）. That in the famels of 21 - 25 years old with maxillary protrusion （88.64） was higher than that with normal occlusion （ P = 0.047 ）. The masticatory performance in the females of 21 - 25 years old with crowding（ 88.67 ） was higher than that with normal occlusion （ P = 0.047 ）. Conclusion： The masticatory efficacy of normal occlusion in young men is higher than that in male teenagers. The masticatory efficacy of younger men with anterior crossbit is lower than that of younger men with normal occlusion and that in young women with maxillary protrusion or crowding is higher than that with normal occlusion.