Читать книгу Fundamentals of Fixed Prosthodontics - James C. Kessler - Страница 114

Root configuration is an important part of the assessment of an abutment’s suitability from a periodontal standpoint. Roots that are broader labiolingually than they are mesiodistally are preferable to roots that are round in cross section (Fig 7-6). Multirooted posterior teeth with widely separated roots will offer better periodontal support than roots that converge, fuse, or generally present a conical configuration (Fig 7-7). The tooth with conical roots can be used as an abutment for a short-span fixed partial denture if all other factors are optimal. A single-rooted tooth with evidence of irregular configuration or with some curvature in the apical third of the root is preferable to the tooth that has a nearly perfect taper.