Ahmed Hassan Assiri, López-López Jose, Egido-Moreno Sonia, Llabrés Xavier Roselló, Hameed Mohammed, Estrugo-Devesa Albert
Department of Odontostomatology, Faculty of Medicine and Health Sciences, School of Dentistry, University Campus of Bellvitge, University of Barcelona, Barcelona Dental Hospital [HOUB], 08970 Barcelona, Spain.
Department of Diagnostic Science and Oral Biology, Faculty of Dentistry, King Khalid University, Abha 61421, Saudi Arabia.
J Clin Med. 2024 Feb 4;13(3):906. doi: 10.3390/jcm13030906.
The mandibular third molar is the most frequently impacted tooth. An impacted mandibular third molar (IMTM) can have negative consequences on the adjacent mandibular second molar (MSM), such as bone loss. An IMTM can be identified using orthopantomography (OPG). Our objective is to compare changes in bone level distal to the mandibular second molar (MSM) in patients with an extracted IMTM versus non-extracted IMTM using OPG. In this retrospective case-control study, 160 orthopantomograms (OPGs) of 80 patients who attended Dental Hospital of the University of Barcelona (HOUB) were randomly selected. Participants were stratified into a study group and control group. Males and females experienced bone gain in the study group and bone loss in the control group. However, the difference in bone-level change was not statistically significant regarding gender in the study group. Within the study group, the age group of 29-39 years demonstrated significant (-value = 0.042) bone gain after extraction compared to other age groups. However, the control group demonstrated bone loss in all age groups in which the difference is not statistically significant (-value 0.794). Bone improvements distal to the MSM were observed after the extraction of an IMTM compared to when an IMTM was not extracted.
下颌第三磨牙是最常发生阻生的牙齿。阻生下颌第三磨牙（IMTM）会对相邻的下颌第二磨牙（MSM）产生负面影响，如骨质丧失。可通过曲面断层片（OPG）来识别IMTM。我们的目的是使用OPG比较拔除IMTM的患者与未拔除IMTM的患者下颌第二磨牙（MSM）远中骨水平的变化。在这项回顾性病例对照研究中，随机选取了巴塞罗那大学牙医院（HOUB）80名患者的160张曲面断层片（OPG）。参与者被分为研究组和对照组。研究组男性和女性均有骨质增加，而对照组均有骨质丧失。然而，研究组中骨质水平变化在性别方面的差异无统计学意义。在研究组中，29至39岁年龄组拔牙后与其他年龄组相比显示出显著的（P值 = 0.042）骨质增加。然而，对照组在所有年龄组中均显示骨质丧失，差异无统计学意义（P值0.794）。与未拔除IMTM相比，拔除IMTM后观察到MSM远中骨质改善。
