PDF(Pubmed)
Abstract：
BACKGROUND: Kissing molars (KMs) are a scarcely reported form of molar impaction in which the occlusal surfaces contact each other within a single dental follicle and the roots point in opposite directions. The direction of KMs impaction is generally tilted. KMs with vertical direction impaction have not been reported in the literature.
METHODS: A 25-year-old female visited a dentist for right maxillary wisdom teeth extraction and was diagnosed with two vertically impacted KMs in the left mandible on panoramic radiography. After cone-beam computed tomography examination confirmed no secondary complication, the patient chose to undergo observation and regular follow-up. A literature review of KMs revealed that vertical impacted KMs are rare; high-quality evidence regarding their prevalence is still lacking. At present, the causality of KMs is controversial. In this study, we have tried to provide a detailed definition of KMs to allow an accurate evaluation of their prevalence and classification based on their impaction direction which may be related to their pathogenesis. The treatment plan of KMs depends on the condition and location of the affected teeth and associated complications; they may be either directly extracted or treated using a multidisciplinary approach including maxillofacial surgeons and orthodontists.
CONCLUSIONS: KMs are a rare clinical condition of impacted teeth with unclear pathogenesis. Vertically impacted KMs were seldom reported. Reasonable definition and classification of KMs can help in the understanding of their causes and prevalence.
METHODS: A 25-year-old female visited a dentist for right maxillary wisdom teeth extraction and was diagnosed with two vertically impacted KMs in the left mandible on panoramic radiography. After cone-beam computed tomography examination confirmed no secondary complication, the patient chose to undergo observation and regular follow-up. A literature review of KMs revealed that vertical impacted KMs are rare; high-quality evidence regarding their prevalence is still lacking. At present, the causality of KMs is controversial. In this study, we have tried to provide a detailed definition of KMs to allow an accurate evaluation of their prevalence and classification based on their impaction direction which may be related to their pathogenesis. The treatment plan of KMs depends on the condition and location of the affected teeth and associated complications; they may be either directly extracted or treated using a multidisciplinary approach including maxillofacial surgeons and orthodontists.
CONCLUSIONS: KMs are a rare clinical condition of impacted teeth with unclear pathogenesis. Vertically impacted KMs were seldom reported. Reasonable definition and classification of KMs can help in the understanding of their causes and prevalence.
摘要：
背景：接吻磨牙（KM）是一种鲜有报道的磨牙撞击形式，其中咬合面在单个牙囊内彼此接触，根指向相反的方向。KMs嵌塞的方向通常是倾斜的。在文献中尚未报道具有垂直方向嵌塞的KMs。
方法：一名25岁的女性去看牙医进行右上颌智齿拔除，在全景X线摄影中诊断为左侧下颌骨有两个垂直撞击的KM。锥形束计算机断层扫描检查证实无继发性并发症，患者选择接受观察和定期随访.对KMs的文献综述表明，垂直影响的KMs很少见；仍然缺乏有关其患病率的高质量证据。目前,KMs的因果关系是有争议的。在这项研究中,我们试图提供KMs的详细定义,以便根据可能与其发病机制相关的嵌塞方向对其患病率和分类进行准确评估.KMs的治疗计划取决于受影响牙齿的状况和位置以及相关并发症；它们可以直接拔除，也可以使用包括颌面外科医生和正畸医生在内的多学科方法进行治疗。
结论：KMs是一种罕见的阻生牙，发病机制不明确。很少报告垂直影响的KM。对KMs进行合理的定义和分类可以帮助理解其原因和患病率。
方法：一名25岁的女性去看牙医进行右上颌智齿拔除，在全景X线摄影中诊断为左侧下颌骨有两个垂直撞击的KM。锥形束计算机断层扫描检查证实无继发性并发症，患者选择接受观察和定期随访.对KMs的文献综述表明，垂直影响的KMs很少见；仍然缺乏有关其患病率的高质量证据。目前,KMs的因果关系是有争议的。在这项研究中,我们试图提供KMs的详细定义,以便根据可能与其发病机制相关的嵌塞方向对其患病率和分类进行准确评估.KMs的治疗计划取决于受影响牙齿的状况和位置以及相关并发症；它们可以直接拔除，也可以使用包括颌面外科医生和正畸医生在内的多学科方法进行治疗。
结论：KMs是一种罕见的阻生牙，发病机制不明确。很少报告垂直影响的KM。对KMs进行合理的定义和分类可以帮助理解其原因和患病率。
