Public Dental Service, Region Västra Götaland, Gothenburg, Sweden.
Department of Orthodontics, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Acta Odontol Scand. 2021 May;79(4):289-295. doi: 10.1080/00016357.2020.1843189. Epub 2020 Nov 11.
The aim of this study was to evaluate if delayed dental development is a cause of postponed care for patients with impacted maxillary canine (IMC).
This case-control study was based on 403,355 children and adolescents in Region Västra Götaland, Sweden. The subjects, who were in the age range of 9-16 years during the period of 2011-2013, underwent surgical exposure or removal of a maxillary canine. Demirjian's dental age assessment was carried out on panoramic radiographs.
In total, 1028 patients, 514 with IMC and 514 age- and gender-matched controls, were enrolled. The patients with IMC exhibited a dental development delay of 0.2 years compared to the control group. In the impaction sub-groups, the female patients, patients in the chronological age group of 12-13 years, and patients with palatally positioned IMC had a significantly lower dental age than their paired-control subjects.
Overall, the difference in dental age between patients with or without IMC is significant but small, and as such is likely of minor clinical relevance. Therefore, the timing of preventive care and treatment for patients with IMC should be the same as that for patients with normally erupting canines.
本研究旨在评估牙发育延迟是否是上颌尖牙埋伏阻生（IMC）患者延迟治疗的原因。
这是一项基于瑞典西约塔兰地区 403355 名儿童和青少年的病例对照研究。研究对象在 2011 年至 2013 年期间年龄在 9-16 岁之间，接受了上颌尖牙的手术暴露或拔除。对曲面断层片进行了 Demirjian 牙龄评估。
共纳入 1028 名患者，其中 514 名患有 IMC，514 名为年龄和性别匹配的对照组。与对照组相比，IMC 患者的牙发育延迟了 0.2 年。在埋伏分组中，女性患者、12-13 岁年龄组的患者和腭侧埋伏的 IMC 患者的牙龄明显低于配对对照组。
总体而言，有或没有 IMC 的患者之间的牙龄差异虽然显著但很小，因此可能具有较小的临床意义。因此，IMC 患者的预防性护理和治疗时机应与正常萌出尖牙的患者相同。
