Awinashe Vaibhav N, Nagda Suhasini J
J Indian Prosthodont Soc. 2010 Jun;10(2):112-7. doi: 10.1007/s13191-010-0028-7. Epub 2010 Dec 8.
Masticatory efficiency is always compromised in complete denture patients. The denture teeth with compromised occlusal anatomy and material further compound the inherent limitations of complete dentures. To compare the masticatory efficiency of patients with complete denture using acrylic and metal occlusal posterior teeth. Ten edentulous patients with well-formed ridges were selected. Complete dentures using acrylic and metal occlusal posterior teeth were fabricated. The masticatory efficiency was calculated using photo colorimeter. Complete dentures with 20° acrylic resin posterior teeth were fabricated for ten edentulous patients and masticatory efficiency was measured using raw beetroot as test food on a photocolorimeter after 10, 15, 20 strokes. The acrylic resin posterior teeth were replaced with metal occlusal posterior teeth on the same denture base. The masticatory efficiency was measured by the same method. The mean average percentage of masticatory efficiency with acrylic resin teeth and metal occlusal teeth were first calculated and statistical analysis was done using students unpaired t test. The average masticatory efficiency with acrylic teeth was 46.46% and metal occlusal teeth was 65.62, 't' = 5.38. The difference between the mean average masticatory performance percentage with acrylic teeth and metal occlusal teeth was significant at 1% i.e. P < 0.01. Within the limitation of this study the average percentage value of masticatory efficiency improves considerably when metal occlusal teeth replace normal acrylic teeth without any alteration in position or relation.
全口义齿患者的咀嚼效率总是会受到影响。咬合解剖结构和材料存在缺陷的义齿牙齿进一步加剧了全口义齿固有的局限性。为比较使用丙烯酸树脂和金属咬合后牙的全口义齿患者的咀嚼效率。选择了10名牙槽嵴形态良好的无牙颌患者。制作了使用丙烯酸树脂和金属咬合后牙的全口义齿。使用光电比色计计算咀嚼效率。为10名无牙颌患者制作了带有20°丙烯酸树脂后牙的全口义齿，并在10次、15次、20次咬合后，以生甜菜根作为测试食物，在光电比色计上测量咀嚼效率。在同一义齿基托上，将丙烯酸树脂后牙替换为金属咬合后牙。用同样的方法测量咀嚼效率。首先计算丙烯酸树脂牙和金属咬合牙咀嚼效率的平均百分比，并使用学生非配对t检验进行统计分析。丙烯酸树脂牙的平均咀嚼效率为46.46%，金属咬合牙为65.62%，“t”=5.38。丙烯酸树脂牙和金属咬合牙的平均咀嚼性能百分比之间的差异在1%水平上具有显著性，即P<0.01。在本研究的局限性内，当金属咬合牙替换普通丙烯酸树脂牙时，在位置或关系无任何改变的情况下，咀嚼效率的平均百分比值有显著提高。
