Small Bruce W
University of Medicine and Dentistry of New Jersey, USA.
Gen Dent. 2004 Jan-Feb;52(1):18-20.
A restorative technique for replacing congenitally missing lateral incisors was necessary when implants were not an option. Two three-unit bridges were considered but were rejected in favor of the much more conservative pinledge retainers. Only a relatively small amount of tooth structure was removed during the preparation of the canines, compared to the amount of reduction necessary for crown abutments. Maryland-type bridges (both all-ceramic and metal-based) also were considered but were rejected due to the tight occlusion and the need to prepare the lingual of both abutments in greater amounts than necessary for the thin gold castings. From an esthetic standpoint, there was a small amount of gold showing but not enough to bother the patient, his parents, or the dentist.
当种植牙不可行时,需要一种修复技术来替代先天性缺失的侧切牙。曾考虑过两座三单位桥体,但最终还是放弃了,转而选择了更为保守的针状边缘固位体。与冠基牙所需的牙体组织减少量相比,在制备尖牙时仅去除了相对少量的牙体结构。还考虑过马里兰型桥体(全陶瓷和金属基),但由于咬合紧密,且需要比薄金铸件所需更多地预备两个基牙的舌侧,最终也被否决。从美观角度来看,有少量金显露,但还不至于让患者、其父母或牙医感到困扰。