下颌阻生第三磨牙不可预测性萌出的分析：一项初步研究。
Analysis of the unpredictable migration of impacted mandibular third molars: A pilot study.
作者信息
Chamorro-Petronacci Cintia-Micaela, Pérez-Sayáns Mario, Gay-Escoda Cosme, Rivas-Mundiña Berta, Lorenzo-Pouso Alejandro-Ismael, Gándara-Vila Pilar, Bilbao-Alonso Arturo, García-García Abel
机构信息
DDS, PhD. Oral Medicine, Oral Surgery and Implantology Unit. Faculty of Medicine and Dentistry; Santiago de Compostela University. Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago, IDIS), Santiago de Compostela, Spain.
MD, DDS, MS, PhD, EBOS, OMFS. Chairman and Professor of Oral and Maxillofacial Surgery and Implantology. Faculty of Medicine and Health Science. University of Barcelona. Director of the master's degree programme in Oral Surgery and Implantology (EFHRE International University - FUCSO). Coordinator / Researcher of the IDIBELL Institute. Head of the Oral Surgery and Implantology and Maxillofacial Surgery Department of the Teknon Medical Centre. Barcelona, Spain.
出版信息
J Clin Exp Dent. 2020 Dec 1;12(12):e1145-e1149. doi: 10.4317/jced.56891. eCollection 2020 Dec.
BACKGROUND
Eruption of an impacted mandibular third molar (3MM) is often unpredictable. The objective of this study was to establish the radiographic parameters of migration in patients whose 3MMs evolved unpredictably.
MATERIAL AND METHODS
This was a retrospective observational study. Patients with unusual 3MM migration (away from their physiological eruption position with changes in the longitudinal and horizontal axes) and with at least two panoramic radiographs were included. To evaluate the radiographic parameters, images were superimposed, using mandibular angle and ipsilateral condyle as references.
RESULTS
Of a total of 2851 patients, four were included in our study. The average age of the patients at the time of the second X-ray was 41.75 (SD=8.42) years. The mean follow-up period was 111 (SD=59.09) months. The migration was caudal in three of the 3MMs (75%) and cranial in one (25%).
CONCLUSIONS
Unpredictable 3MM migration is rare, and occurs mostly in the vertical direction with an average angle of 12 degrees. None of these migrations were related to any type of lesion. Our results reveal that, due to its unpredictable behaviour, impacted wisdom teeth have to be periodically radiographically evaluated even if surgical extraction is not indicated. Tooth migration, third molar, ectopic tooth.
背景
下颌阻生第三磨牙（3MM）的萌出通常不可预测。本研究的目的是确定3MM萌出不可预测的患者的影像学迁移参数。
材料与方法
这是一项回顾性观察研究。纳入3MM有异常迁移（偏离其生理萌出位置，纵轴和横轴均有变化）且至少有两张全景X线片的患者。为评估影像学参数，以下颌角和同侧髁突为参照进行图像叠加。
结果
在总共2851例患者中，4例纳入本研究。第二次X线检查时患者的平均年龄为41.75（标准差=8.42）岁。平均随访期为111（标准差=59.09）个月。3颗3MM（75%）的迁移是向尾侧的，1颗（25%）是向头侧的。
结论
不可预测的3MM迁移很少见，且大多发生在垂直方向，平均角度为12度。这些迁移均与任何类型的病变无关。我们的结果表明，由于其行为不可预测，即使不建议手术拔除，阻生智齿也必须定期进行影像学评估。牙齿迁移、第三磨牙、异位牙。
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