Nozawa Takeshi, Kitami Norikazu, Tsurumaki Shunzo, Enomoto Hiroaki, Ito Koichi
Quintessence Int. 2011 Feb;42(2):109-12.
Failure to tend to inadequate crown contours in the crown trial can cause long-term disharmony of the free gingival form. This case report describes a novel technique for free gingival impression from a final provisional restoration to a zirconia crown. Two die casts were manufactured from a silicone impression. The first die cast was for the zirconia crown; the second die cast was for the final provisional restoration and the provisionalized transfer coping. A free gingival impression was taken using a provisionalized transfer coping, and a soft gingival model was manufactured. The proximal contact position was managed using the predicted convex curve of the interdental papillae. One year after zirconia crown placement, no inflammation was observed around the pyramidal interdental papillae, and symmetric interdental papilla heights were evident. A free gingival impression using a two die-cast technique appears to be useful for achieving optimal interdental papilla height.
在牙冠试戴过程中若未处理好牙冠外形轮廓不足的问题,可能会导致游离龈形态长期不协调。本病例报告描述了一种从最终临时修复体到氧化锆牙冠获取游离龈印模的新技术。通过硅橡胶印模制作了两个铸型。第一个铸型用于制作氧化锆牙冠;第二个铸型用于制作最终临时修复体和临时转移帽。使用临时转移帽获取游离龈印模,并制作了软质牙龈模型。利用预测的牙间乳头凸曲线来处理邻面接触位置。氧化锆牙冠就位一年后,在锥形牙间乳头周围未观察到炎症,且牙间乳头高度对称明显。使用双铸型技术获取游离龈印模似乎有助于实现最佳的牙间乳头高度。