Cases of furcation that involve particular anatomical configurations , i . e . , interradicular root proximity / fusion , have long been considered relative contraindications for treatments such as root amputation or hemisection 在面對(duì)根岔侵犯并加上牙根合并或緊鄰的問題時(shí),牙根切除術(shù)或牙齒切半術(shù),在傳統(tǒng)上均被視為禁忌。