Michelon P, Crousillat J, Moal J M
Faculté l'Odontologie de Marseille.
Cah Prothese. 1991 Sep(75):78-86.
The loss of a maxillary incisor is traditionally treated with a three-unit bridge. The progress made in dental implantology since the demonstration of osseointegration by Brånemark and al. allows the overall replacement of the missing tooth. Furthermore, the use of osseointegrated implants makes the replacement of a single maxillary incisor reliable and aesthetic, even in cases of moderate gingival and bone recession. In respect of the rules set forth by Brånemark and al., it is essential to make a wax-up and a surgical stents. For anterior teeth, the single tooth abutment marketed by Nobelpharma allows the aesthetic margins of the prosthesis to be placed in a sub-gingival position. Once this component is positioned on the fixture, the achievement of the prosthesis is practically identical to traditional metal ceramic crown. The abutment is maintained on the fixture by a screw which can be easily removed and avoids an excess of subgingival cement. Nonetheless, its diameter means that it is reserved for relatively wide teeth. This type of treatment involves the development of a reliable and proven surgical planning for bone grafts, especially in cases of facial traumatism.
传统上，上颌中切牙缺失采用三单位桥体进行治疗。自布伦马克等人证明骨结合以来，牙种植学取得的进展使得能够整体替换缺失牙。此外，使用骨结合种植体即使在中度牙龈和骨退缩的情况下，也能使单个上颌中切牙的替换既可靠又美观。根据布伦马克等人制定的规则，制作蜡型和手术支架至关重要。对于前牙，诺贝尔制药公司销售的单牙基台可将修复体的美学边缘置于龈下位置。一旦该部件安装在种植体上，修复体的制作实际上与传统金属烤瓷冠相同。基台通过一颗易于拆卸的螺丝固定在种植体上，避免了龈下粘结剂过多。然而，其直径意味着它仅适用于相对较宽的牙齿。这种治疗方法需要制定可靠且经过验证的骨移植手术计划，尤其是在面部创伤的情况下。
