锥形束CT在青少年多生牙诊断中的应用

目的：观察青少年多生牙影像学和临床特点，阐明锥形束CT （CBCT）在多生牙诊断中的临床应用价值。方法：选取经过CBCT扫描并已确诊的青少年多生牙患者共146例，分析患者性别、多生牙数目、形态、位置及与邻牙及骨组织的结构关系等，评估多生牙形态不同引起邻牙吸收率的变化。结果：146例患者男女比例为1.98：1（97/49），其中95例（65.07%）为单个多生牙。146例患者共有203颗多生牙，其中圆锥形多生牙为132颗（65.02%），倒置多生牙112颗（55.17%），牙根弯曲多生牙48颗（23.65%）；多生牙形态不同引起牙根吸收率比较差异无统计学意义（P>0.05）。结论：CBCT可直观显示多生牙数目和位置等影像学及临床特点，可为多生牙的诊断和治疗方案的制定提供重要的临床依据。

Application of cone beam CT in diagnosis of supernumerary teeth of adolescents

Objective: To observe the image and clinical characteristics of the supernumerary teeth of the adolescents, and to elucidate the clinical application value of cone beam CT(CBCT) in the diagnosis of supernumerary teeth.Methods: A total of 146 adolescents with supernumerary teeth scanned by CBCT and comfirmed were selected.The patient's gender, supernumerary teeth localization, number, shape and the root resorption of adjacent teeth were retrospectively analyzed.The changes in the root resorption rates of adjacent teeth induced by different supernumerary teeth shapes were evaluated.Results: The proportion of men to women with supernumerary teeth in 146 patients was 1.98:1(97/49). Among them,95(65.07%) patients were single supernumerary teeth. There were 203 supernumerary teeth in the 146 patients;among them,132(65.02%)supernumerary teeth were conical,112(55.17%) supernumerary teeth were inverted, and 48(23.65%) supernumerary teeth were curved root. There was no statistically significant difference between the root resorption rates of adjacent teeth induced by the different shapes of supernumerary teeth(P>0.05).Conclusion: CBCT can show the localization, the number of supernumerary teeth and other image and clinical charactersistics, which can provide the important evidence for the diagnosis and treatment of supernumerary teeth.