关键词: 舌侧集中牙合, 解剖式双侧平衡牙合, 咀嚼效率, 咬合力, 闭口式印模

Abstract:

Abstract：Objective To compare the difference in the masticatory efficiency and the occlusal force in two different types of complete denture for edentulous patients with low alveolar ridge：the lingualized occlusion and the anatomic bilateral balanced occlusion. Methods Totally 20 patients with the residual resorption of the edentulous were collected from Department of Prosthodontics，School of Stomatology，China Medical University. Two different types of complete dentures （the lingualized occlusion and the anatomic bilateral balanced occlusion）were made for each patient in the same vertical distance and centric relation occlusion record using closed-type impression techniques. Each patient randomly received both the two types of complete dentures. Each pair of dentures was measured the masticatory efficiency by light absorption method and the maximal bite force was measured by Tee-Tester occlusion pressure measurement after 1 week and 3 months，respectively. All patients received questionnaire survey after using for 3 months in each pair of dentures. Results The masticatory efficiency of the lingualized occlusion was slightly higher than the anatomic bilateral balanced occlusion，but there was no statistically significant difference. The occlusal force of the lingualized occlusion was less than the anatomic bilateral balanced occlusion and there was statistically significant difference. In the questionnaire，the patients gave a high evaluation on the complete denture of lingualized occlusion. Conclusion Compared with the complete denture of anatomic bilateral balanced occlusion，the complete denture of lingualized occlusion has higher stability，with the same masticatory efficiency and less occlusion pressure，which protects the alveolar ridge and delays the absorption of alveolar ridge.

Key words: lingualized occlusion, anatomic bilateral balanced occlusion, masticatory efficiency, occlusal force, closed-type impression