Ross I F, Thompson R H
J Periodontol. 1980 Aug;51(8):450-4. doi: 10.1902/jop.1980.51.8.450.
This is a sequel to a previous study that showed that many molars with furcation involvement (F.I.) can survive in a state of health and can function efficiently and without pain for many years. This finding is at variance with the views of others who believe that the prognosis for teeth with F.I. is unfavorable. The conclusions of the present study are: (1) F.I. of molars was a common finding; it occurred much more frequently than anticipated. (2) F.I. occurred three times more frequently among maxillary molars than among mandibular molars. (3) Many molars with F.I. functioned well from 5 to 24 years. (4) Based on these findings, it is suggested that two aspects of molars with F.I. be reevaluated, i.e. their prognosis and treatment. Further it is suggested that therapy for these teeth be designed to improve their functional environment and that in many instances removal of root or bone or extraction of the tooth is not necessary. (5) F.I. was detected more frequently in maxillary molars by radiographic examination than by clinical examination. On the other hand F.I. was detected more frequently in mandibular molars by clinical examination than by radiographic examination.
这是之前一项研究的后续研究。之前的研究表明，许多存在根分叉病变（F.I.）的磨牙能够保持健康状态存活，并且能够高效发挥功能且多年无痛。这一发现与其他一些人的观点不同，他们认为患有根分叉病变的牙齿预后不佳。本研究的结论如下：（1）磨牙的根分叉病变是常见现象；其发生频率比预期高得多。（2）上颌磨牙的根分叉病变发生率是下颌磨牙的三倍。（3）许多患有根分叉病变的磨牙在5至24年期间功能良好。（4）基于这些发现，建议对患有根分叉病变的磨牙的两个方面进行重新评估，即它们的预后和治疗。此外，建议针对这些牙齿的治疗旨在改善其功能环境，并且在许多情况下，没有必要进行牙根或骨组织切除或拔牙。（5）通过影像学检查在上颌磨牙中比在临床检查中更频繁地检测到根分叉病变。另一方面，通过临床检查在下颌磨牙中比在影像学检查中更频繁地检测到根分叉病变。
