Department of Periodontology, Faculty of Dentistry, Medical University of Warsaw, Warszawa, Poland.
Department of Oral and Maxillofacial Surgery, University Hospital in Copenhagen (Rigshospitalet, Copenhagen Ø, Denmark.
Dent Traumatol. 2021 Oct;37(5):691-698. doi: 10.1111/edt.12680. Epub 2021 May 4.
BACKGROUND/AIMS: Autotransplantation of developing premolars is an established treatment to replace missing teeth in the anterior maxilla in growing patients with a reported success rate of over 90%. The normal shape of the alveolus is observed after transplantation, but data on the presence and amount of alveolar bone after healing has not been previously reported. The aim of this study was to look for potential differences in alveolar bone dimensions between sites where autotransplanted premolars replaced missing incisors and control sites of contralateral incisors.
MATERIAL/METHODS: There were 11 patients aged between 10 and 12 years five months (mean age: 10 years and 7 months) who underwent autotransplantation of a premolar to replace a central incisor. Cone Beam Computed Tomography (CBCT) performed at least 1 year after transplantation served to evaluate bone at sites of autotransplanted premolars and controls (contralateral maxillary central incisor). The thickness of the labial bone, plus the height and width of the alveolar process were measured on scans and compared at transplant and control sites.
Mean thicknesses of the labial bone at the transplant and control sites were 0.78 mm and 0.82 mm respectively. Mean alveolar bone height was 15.15 mm at the transplant sites and 15.12 mm at the control sites. The mean marginal thickness of the alveolus was 7.75 mm at the transplant sites and 7.98 mm at the control sites. Mean thicknesses of the alveolus for half of its vertical dimension at the transplant and control sites were 7.54 mm and 8.03 mm, respectively.
The mean values of bone thickness, width and height of the alveolar process at sites of transplanted premolars were comparable to the mean values for the control incisors. Successful autotransplantation of developing premolars to replace missing central incisors allowed preservation of alveolar bone in the anterior maxilla.
背景/目的：将正在发育的前磨牙自体移植是一种成熟的治疗方法，用于替代生长中的上颌前牙缺失的牙齿，其成功率超过 90%。移植后可观察到牙槽骨的正常形态，但之前没有报道过愈合后牙槽骨的存在和数量的数据。本研究旨在观察自体移植前磨牙替代缺失中切牙的部位与对侧中切牙的对照部位的牙槽骨尺寸是否存在差异。
材料/方法：11 名年龄在 10 至 12 岁零 5 个月（平均年龄：10 岁零 7 个月）的患者接受了自体移植前磨牙以替代中切牙。在移植后至少 1 年进行锥形束计算机断层扫描（CBCT），以评估自体移植前磨牙和对照部位（对侧上颌中切牙）的骨情况。在扫描时测量唇侧骨的厚度以及牙槽突的高度和宽度，并在移植部位和对照部位进行比较。
移植部位和对照部位的唇侧骨平均厚度分别为 0.78mm 和 0.82mm。移植部位的牙槽骨平均高度为 15.15mm，对照部位为 15.12mm。移植部位的牙槽缘平均厚度为 7.75mm，对照部位为 7.98mm。移植部位和对照部位牙槽骨垂直高度的一半的平均厚度分别为 7.54mm 和 8.03mm。
移植前磨牙部位的牙槽骨厚度、宽度和高度的平均值与对照中切牙的平均值相当。成功地将正在发育的前磨牙自体移植以替代缺失的中切牙，可以保留上颌前牙的牙槽骨。
