摘要
目的 :了解因重度牙周炎拔除的磨牙根分叉形态及根柱凹陷的发生情况。方法 :对因重度牙周炎拔除的 3 0个上颌第一磨牙 ,15个上颌第二磨牙 ,3 0个下颌第一磨牙及 10个下颌第二磨牙进行测量 ,记录牙根长度(RL) ,根柱长度 (RTL) ,釉牙骨质界处的近远中径 (MDD)和颊舌径 (BLD) ,根柱凹陷的有无 ,釉牙骨质界到根柱凹陷的距离及根分叉开口下 2mm的宽度。结果 :①无论是上颌还是下颌磨牙 ,第一磨牙牙根长度及根柱长度均较第二磨牙短 ,而第一磨牙颊舌径、近远中径及根分叉开口下 2mm处宽度均较第二磨牙大 ,其中仅 4.71%的牙根分叉开口下 2mm处宽度小于 0 .75mm。②上颌磨牙根柱凹陷发生率高于下颌磨牙 ( p <0 .0 5 ) ,且 89.41%的牙至少在一个面上从根柱凹陷到釉牙骨质界的距离为零。结论 :根柱凹陷可能是造成根分叉病变的原因 ,并可能是导致牙周治疗效果欠佳的原因。
Objective:To know the morphology of root furcation and the incidence of the root trunk concavities of molars with severe peridontitis.Method:A total of 85 extrated molars with severe peridontitis were examined and classified: 35 maxillary first molars, 15 maxillary second molars, 30 mandibular first molars, 10 mandibular second molars. Root length (RL), root trunk length (RTL), mesial and distal diameter of cementoenamel junction (CEJ)(MDD), buccal and lingual diameter of CEJ (BLD),the existence of the root trunk concavities and the width of molar root separation at the below 2mm root furcation entrance were measured.Result: 1. The root length and the root trunk length of the maxillary and mandibular first molars were shorter than those of the second molars. The second molar had a larger BLD, larger MDD and the more width of molar root separation at the below 2 mm root furcation entrance.4.71% of all the molars had the width of molar root separation at the 2 mm below root furcation entrance which was <0.75 mm. 2. The results showed the incidence of root trunk concavities in the maxillary molar was higher than that in the mandibular molar (p<0.05). There was 89.41% of the molars with the root trunk concavities and the distance from the CEJ to root trunk concavities was zero in at least one aspect.Conclusion:Root trunk concavities may cause furcation involvement and reduce the efficacy of periodontal therapy.
出处
《临床口腔医学杂志》
2003年第11期646-648,共3页
Journal of Clinical Stomatology
基金
福建省自然科学基金资助 (C0 1 1 0 0 1 4 )
福建省科技厅重大课题资助项目 (2 0 0 1Z0 2 1 )
关键词
牙周炎
根分又病变
根分叉解剖
根柱凹陷
periodontitis
furcation involvement
root furcation anatomy
root trunk concavities
