Koshino Hisashi, Hirai Toshihiro, Ishijima Tsutomu, Ohtomo Koji
Department of Removable Prosthodontics, Health Sciences University of Hokkaido, School of Dentistry, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido 061-0293, Japan.
Int J Prosthodont. 2002 May-Jun;15(3):295-8.
The purpose of this study was to investigate the influence of mandibular residual ridge shape on masticatory efficiency in complete denture wearers.
Twenty-eight complete denture wearers (mean age 75.6 years, SD 4.8) who received their complete denture treatment by one of the authors and had no troubles in daily use were selected. The mandibular residual ridge was evaluated by using a replica of the ridge obtained with heavy-body silicone impression material. The basal area of the replica was measured by a digitizer. The volume and the height of the replica were calculated. Masticatory efficiency in each subject was measured by the sieving method.
There was a significant correlation between the masticatory efficiency and basal area, volume, and height of the residual ridge. The basal area showed the strongest correlation.
The basal area of the denture foundation greatly influenced the masticatory efficiency, suggesting that the masticatory efficiency in complete denture wearers was limited by their own residual ridges and that clinicians should inform their patients about the limitation of the recovery of masticatory ability before the beginning of denture treatment.
本研究旨在调查下颌剩余牙槽嵴形态对全口义齿佩戴者咀嚼效率的影响。
选取28名全口义齿佩戴者（平均年龄75.6岁，标准差4.8），这些患者均由作者之一进行全口义齿治疗，且日常使用无问题。使用重体硅橡胶印模材料获取的牙槽嵴复制品对下颌剩余牙槽嵴进行评估。用数字化仪测量复制品的基底面积。计算复制品的体积和高度。通过筛分法测量每个受试者的咀嚼效率。
咀嚼效率与剩余牙槽嵴的基底面积、体积和高度之间存在显著相关性。基底面积的相关性最强。
义齿基托的基底面积对咀嚼效率有很大影响，这表明全口义齿佩戴者的咀嚼效率受自身剩余牙槽嵴的限制，临床医生应在义齿治疗开始前告知患者咀嚼能力恢复的局限性。
