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目的:探讨口腔颌面部骨岛在锥形束CT(Cone beam CT,CBCT)的影像特点。方法:回顾性总结分析2016年3月8日~2016年4月30日在四川大学华西口腔医院放射科4271名患者CBCT影像资料,其男2005名,女2266名,年龄为8~80岁,平均年龄40.4岁。分析颌面部骨岛发生率、分布规律与年龄、性别和部位的关系,并对骨岛进行简单分类。结果:4271名患者CBCT片中有387例患者发现骨岛492个,总发生率9.1%,其中女238名,男149名,两者颌骨骨岛发生率不同,女性(10.5%)高于男性(7.4%),差异有统计学意义(P<0.05)。各年龄组颌骨骨岛发生率不同,10~29岁年龄段人群颌骨骨岛发生率最高。骨岛好发于下颌前磨牙区和磨牙区,下颌骨岛所占比例约为上颌的3倍,而上颌骨岛好发于前磨牙区。骨岛与牙齿及硬骨板的位置关系以根尖型最为常见,其次是完全孤立型,孤立根间型最少见。中央硬化型颌骨骨岛较内生骨疣型在CBCT中更为常见,内生骨疣型和中央硬化型均有均质型和非均质型,均质型最为常见。结论:CBCT能较全面的反映骨岛的三维形态及其与周围结构(尤其是根尖)的关系,对于全景片上较难发现的骨岛以及上颌骨岛的检出率优势突出。
Objective: To investigate the imaging features of oral and maxillofacial bone islands in Cone beam CT (CBCT). Methods: The CBCT images of 4271 patients admitted to Huaxi Stomatology Hospital of Sichuan University from March 8, 2016 to April 30, 2016 were retrospectively analyzed. Among them, there were 2,500 men and 2266 women aged 8 to 80 years old, The average age is 40.4 years old. The incidence and distribution of bone island in maxillofacial region were analyzed, and their relationship with age, gender and location were analyzed. A simple classification of the bone island was performed. Results: Among the 4271 patients, 492 were found in 387 cases of CBCT. The total incidence was 9.1%, of whom 238 were female and 149 were male. The incidence rates of mandibular and mandibular islands were different between the two groups (10.5%) Male (7.4%), the difference was statistically significant (P <0.05). The incidence of mandibular bone island in each age group was different, and the incidence of mandibular bone island was the highest in 10 ~ 29 age group. Bone island occur in the mandibular premolar area and molar area, the mandibular island accounted for about 3 times the maxillary, while the maxillary island occurs in the premolar area. The relationship between the bone island and the position of the tooth and the rigid plate is most common with the apical type, followed by the complete solitary type, the isolated type with the lightest type. Central mandibular bone island is more common than endogenous bone warts in CBCT, and endogenous bone warts and central sclerosis are homogeneous and heterogeneous, and the most common isotype. CONCLUSION: CBCT can fully reflect the three-dimensional shape of the bone island and its relationship with the surrounding structures (especially the apical), and has a predominance of the detection rate of bone islands and the maxillary island which are more difficult to be found on panoramic films.