颌骨骨岛的CBCT三维影像特点分析

doi:10.13591/j.cnki.kqyx.2024.10.001

摘要/Abstract

摘要：

目的利用锥形束CT(cone-beam computed tomography,CBCT)分析颌骨骨岛(bone island,BI)的三维影像特点。方法选取4 000例患者的CBCT数据,用NNT 10.0软件进行CBCT数据重建,采用矢状位、冠状位和轴位图分析BI的三维特点,包括位置、形状、密度、边界、与骨皮质和牙根的关系、直径、累及的解剖结构及并发症,分析上述BI影像学特征的性别差异。结果共803例有骨岛,总发生率为20.08%。其中男338例,共有骨岛389个;女465例,共有骨岛526个。男性和女性均以1个骨岛为主,发生骨岛的男女性别比为1∶1.38,但差异无统计学意义(P>0.05)。男性和女性的BI均多发于下颌前磨牙和磨牙区,主要表现为不规则形,以高密度、半舌型最多见,大多位于根尖下方并且边界不清。男性和女性BI的近远中向平均最大径均大于颊舌向平均最大径(P<0.05),最常累及的解剖结构是下牙槽神经管、骨皮质浸润和颏孔。结论中国人颌骨BI的三维影像特点无性别差异,CBCT能准确全面地分析BI的三维影像学特点及与周围牙和骨组织的关系。

关键词: 骨岛, 锥形束CT, 并发症, 三维影像特点

Abstract:

Objective To analyze three-dimensional(3D) radiographic characterizations of bone island(BI) in jaw using cone-beam computed tomography(CBCT). Methods CBCT data from four thousand patients were selected, reconstructed and analyzed using NNT 10.0 software. The sagittal, coronal and axial planes were used to analyze the 3D radiographic characteristics of BIs, including the localization, shape, density, boundary, the relationship between BIs and tooth and bone cortex, diameter and anatomical structures and complications involved. Their relationship with gender were analyzed. Results A total of 803 people had BIs, with the prevalence rate of 20.08%, including 338 males with 389 BIs and 465 females with 526 BIs. Both males and females had a dominant BI, and the ratio between male and female was 1∶1.38, but the difference was not statistically significant(P>0.05). The BIs of both male and female mostly occurred in the mandibular premolars and molars area, and appeared irregular in shape, dense and contact with lingual bone cortex. Mostly BIs were apical type and with unclear boundary. The mean maximum diameter of mesial/distal direction was greater than buccal/lingual direction(P<0.05). The most commonly involved anatomy structure was the inferior alveolar neural canal, cortical infiltration and mental foramen. Conclusion There are no significant differences between males and females in the three-dimensional image characteristics of BIs in Chinese populations. CBCT can accurately and comprehensively analyze the 3D radiographic characteristics of BI and its relationship with the surrounding teeth and bone.

Key words: bone island, cone beam computed tomography, complication, three-dimensional radiographic characteristic

中图分类号:

闫世杰, 杨连丰, 王晶艳, 张娟, 朱婷婷, 冷迪雅, 周广超, 顾培玉. 颌骨骨岛的CBCT三维影像特点分析[J]. 口腔医学, 2024, 44(10): 721-727.

YAN Shijie, YANG Lianfeng, WANG Jingyan, ZHANG Juan, ZHU Tingting, LENG Diya, ZHOU Guangchao, GU Peiyu. Analysis of the three-dimensional image characteristics of bone island in jaw using CBCT[J]. Stomatology, 2024, 44(10): 721-727.

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性别	1个	2个	3个	4个
男性	293(86.69)	39(11.54)	6(1.78)	0(0)
女性	409(87.96)	52(11.18)	3(0.61)	1(0.22)

性别	上颌			下颌
性别	上颌前部	上颌中部	上颌后部	下颌前部	下颌中部	下颌后部
男性	13(3.34)	12(3.08)	4(1.03)	101(25.96)	139(35.73)	120(30.85)
女性	6(1.14)	18(3.42)	17(3.23)	90(17.11)	172(32.70)	223(42.40)

性别	不规则形	类圆形	类半圆形	类椭圆形	类条索形
男性	256(65.81)	91(23.39)	27(6.94)	10(2.57)	5(1.28)
女性	337(64.07)	104(19.77)	39(7.41)	29(5.51)	17(3.23)

性别	孤岛	半颊型	半舌型	全岛
男性	59(15.17)	71(18.25)	168(43.19)	91(23.39)
女性	83(15.78)	96(18.25)	209(39.73)	138(26.24)

性别	高密度	混合密度	稍高密度
男性	325(83.55)	42(10.80)	22(5.66)
女性	449(85.36)	60(11.41)	17(3.23)