Methods 27 patients with VRFs were observed.
方法对27例牙根纵裂患者进行临床分析。
Objective to study the pathogenic factors of vertical root fractures (VRFs).
目的分析牙根纵裂的致病因素。
Objective to study the anatomical factors of vertical root fractures (VRFs) on vital pulp of maxillary first molar.
目的分析活髓下颌第一磨牙根纵裂的解剖学病因。
Results the predilection age of VRFs was over40 years old, the predilection teeth of VRFs were molars and premolars, and most teeth with VRFs had periodontal lesions.
结果牙根纵裂好发于40岁以上年龄，以磨牙及前磨牙较为多见，均伴有牙周损害。
Results the predilection age of VRFs was over40 years old, the predilection teeth of VRFs were molars and premolars, and most teeth with VRFs had periodontal lesions.
结果牙根纵裂好发于40岁以上年龄，以磨牙及前磨牙较为多见，均伴有牙周损害。
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