Turner C H
J Oral Rehabil. 1982 Sep;9(5):427-34. doi: 10.1111/j.1365-2842.1982.tb01032.x.
A retrospective study has been carried out of the marginal fit and associated gingival health of jacket crowns placed around gold posts 5 years previously. Crown fit was classified as either visibly or palpably satisfactory, overhanging or deficient. 67.2% of crowns showed one or more discrepancies of marginal fit, and this varied with the position around the tooth. Palatal margins of maxillary porcelain jacket crowns fitted poorly and there was frequent caries at this site. Periodontal pocketing developed mesially and distally, and little gingival recession. In contrast gingival recession, exposing the crown margins, occurred frequently labially and palatally, but the mean periodontal pocket depth remained within normal limits.
一项回顾性研究针对5年前安装在金桩周围的甲冠的边缘适合性及相关牙龈健康状况展开。牙冠适合性被分类为视觉或触诊上令人满意、悬突或不足。67.2%的牙冠显示出一个或多个边缘适合性差异，且这随牙齿周围位置而变化。上颌烤瓷甲冠的腭侧边缘适合性差，且该部位龋齿频发。近中及远中出现牙周袋，牙龈退缩较少。相比之下，唇侧和腭侧频繁出现牙龈退缩致使牙冠边缘暴露，但平均牙周袋深度仍在正常范围内。
