抄録
An eighteen year old female patient with cleft lip and palate underwent prosthetic treatment using a partial denture. Examination of electromyography of masticatory muscles, mandibular movement, masticatory efficiency, and articulation test were conducted periodically concerning restoration of oral function after treatment.
1. Examination revealed no occurence of decay in abutment teeth or gingival inflammation, nor any other particular problems even one year after denture placement.
2. Analysis of electromyography revealed a periodic increase to the integral value for maximum clenching the first month but stabilized thereafter. The integral value for chewing varied only slightly. Chewing time decreased slightly and masticatory rhythm stabilized with time. Silent period duration showed little difference before and after treatment.
3. An increase in the speed of rapid opening and closing movement was noted. In the gothic arch, pre-treatment forward movement on the right side was improved and now occurs smoothly. Concerning chewing movement, the distance of sliding contact at closing phase for chewing on the right side decreased, and although a chewing pattern translation from grindertype to chopper-type developed.
4. Masticatory efficiency improved from the second week, but the value itself was considerably smaller than for persons with normal dentition.
5. In the articulation test, these was a significant increase from a pre-treatment 67.2% to a post-treatment 84.8% which after one year rose to 87.3%.
