Department of Family Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan, ROC.
Angle Orthod. 2012 May;82(3):565-71. doi: 10.2319/062411-409.1. Epub 2011 Oct 12.
Simultaneous impactions of first, second, and third permanent molars comprises a very rare clinical situation with diverse therapeutic approaches and is a difficult challenge for dentists. Early diagnosis and treatment of eruption disturbances contributes to optimal outcomes. This article reports the treatment of a teenager with severe impaction of right mandibular first, second, and third molars, which hinders the masticatory function and dental arch integrity. A decision-making process and a simple orthodontic technique are described. To shorten the treatment time and simplify the procedures, the impacted right mandibular third and second molars were orthodontically uprighted with an innovative tip-back cantilever. Subsequently, the deeply impacted right mandibular first molar was extracted with minimal obstacles. The combined surgical-orthodontic approach resolved a challenging clinical problem and eliminated the need for prosthetic or dental implant replacement of the impacted molars. Good occlusion, normal function, and a healthy periodontium of the patient were also achieved.
下颌第一、第二、第三恒磨牙同时阻生的情况非常罕见,其治疗方法多种多样,对牙医来说是一个挑战。早期诊断和治疗萌出障碍有助于获得最佳的治疗效果。本文报告了一例青少年右侧下颌第一、第二、第三恒磨牙严重阻生的治疗情况,该阻生严重影响了咀嚼功能和牙弓的完整性。本文介绍了治疗决策过程和一种简单的正畸技术。为了缩短治疗时间并简化治疗程序,使用创新性的后倾曲唇弓将右侧下颌第三、第二恒磨牙正畸直立。随后,通过微创拔牙技术拔除了严重阻生的右侧下颌第一磨牙。联合应用外科-正畸方法解决了一个具有挑战性的临床问题,避免了对阻生磨牙进行修复或种植体替代。同时还实现了患者良好的咬合、正常的功能和健康的牙周组织。