歯冠補綴物と歯肉に関する臨床的研究

第1報 歯冠補綴物装着までの過程が歯肉に及ぼす影響

抄録

The purpose of this study was to investigate each and individual step of the construction of fixed prosthetic appliances, and its effects on the marginal gingivae. The fixed prosthetic appliances consisted of twenty porcelain fused to metal crowns and six full cast crowns of the anterior and posterior teeth respectively. The state of the marginal gingivae was determined by staining the exfoliative epithelium of the gingival sulcus, recording the gingival fluid, and measuring the gingival index and depth of the gingival sulcus.
The results of the experiment were as follows:
1. Effects upon the marginal gingivae were greatest during the preparation of the tooth abutment and slight during impression taking. Some temporary resin crowns were shown to have effect upon the marginal gingivae while others did not.
2. Based upon daily clinical procedures in making a crown, effects on the marginal gingivae could be observed in the different stages of construction. However, after setting the crown for a period to disappear.
3. No significant differences were observed in relation to crown construction and its effect on the marginal gingivae between the full cast crowns and porcelain fused to metal crowns.
4. Continual observations of the sulcular exfoliative epithelium and sulcular fluid proved to be an effective method in detecting minute and early changes of the gingival sulcus.