顆粒状ハイドロキシアパタイト適用による コンニャク状顎堤改造

―レーザー計測を利用した顎堤分析法による改造顎堤の設計と評価の試み―

抄録

The purpose of this study was to evaluate procedures to improve the reconstruction of the maxillary edentulous ridge with flabby tissue by application of hydroxyapatite granules (HAP).
The edentulous ridge contour analyzing system (ERCAS) was deverloped and improved, and an edentulous ridge with flabby tissue was designed by application of HAP. Furthermore, the reconstructed ridge was evaluated.
The following methods were used to evaluate the therapeutic usefulness:
1. The analytical items of ERCAS
1) The edentulous ridge on the occlusal view
2) The edentulous ridge contour
3) The artificial tooth position on the edentulous ridge
2. The measurement of denture mobility by Mandibular Kinesiograph (MKG)
3. A questionnaire on diet and masticatory performance of food classified according to hardness.
4. Examination of the mucosal tissue of the edentulous ridge with HAP by tissue reflectance spectrophotometry.
The results were as follows:
1. The reconstructed edentulous ridge was enlarged in the labial and buccal directions by the application of HAP.
2. Application of HAP and the use of Levin's bladed teeth decreased denture movement while chewing and improved the masticatory performance.
3. The mucosal tissue of the edentulous ridge with HAP showed the same properties as those of the normal edentulous ridge.
4. ERCAS is useful to design the edentulous ridge for reconstruction and to evaluate the treatment results.