Periodical observations of the gingival tissue after a 3 year placement of fixed prosthesis was made.
The prosthetic appliances consisted of 4 full cast crowns in the molar region and 16 porcelainfused-to-metal crowns in the anterior region.
The objective of this report was to measure the amount of crevicular fluid and appearance rate of exfoliative epithelial cells of the gingival sulcus, as well as recording the gingival index and depth of the sulcus itself. To clarify the marginal fit between the prosthetic appliances to the cervical region, the replication technique was used and observed under a scanning electron microscope (SEM).
Results showed 18 cases of the cement thickness to be 50-105μm which were within clinical standards, and 2 cases which were not (280-340μm). The marginal fit region were then classified into the following 3 categories, smooth type, overhanging type, and underhanging type. Results showed a possible effect of prosthetic appliances on the gingiva, for the crevicular fluid and appearance rate of exfoliative epithelial cells which met clinical standards showed no significant statistical or periodical change, while an increase was observed in those which did not meet clinical standards.
Accurate procedures leading up to the setting of the crown can result in satisfactory placement, which in turn can be correlated to the longevity of normal marginal periodontal tissue and harmonious balance between it and the prosthetic appliance.
