Gandini L G, Buschang P H
Department of Orthodontics, Araraquara School of Dentistry - UNESP, Araraquara, SP - Brazil.
Am J Orthod Dentofacial Orthop. 2000 Jan;117(1):75-80. doi: 10.1016/s0889-5406(00)70251-4.
The purpose of this implant study was to evaluate the transverse stability of the basal maxillary and mandibular structures. The sample included 25 subjects between 12 and 18 years of age who were followed for approximately 2.6 years. Metallic implants were placed bilaterally into the maxillary and mandibular corpora before treatment. Once implant stability had been confirmed, treatment (4 first premolar extractions followed by fixed appliance therapy) was initiated. Changes in the transverse maxillary and mandibular implants were evaluated cephalometrically and two groups (GROW+ and GROW++; selection based on growth changes in facial height and mandibular length) were compared. The GROW++ group showed significant width increases of the posterior maxillary implants (P <.001) and the mandibular implants (P =.009); there was no significant change for the anterior maxillary implants. The GROW+ group showed no significant width changes between the maxillary and mandibular implants. We conclude that (1) there are significant width increases during late adolescence of the basal mandibular and maxillary skeletal structures and (2) the width changes are related with growth potential.
这项植入物研究的目的是评估上颌和下颌基部结构的横向稳定性。样本包括25名年龄在12至18岁之间的受试者，随访时间约为2.6年。在治疗前，将金属植入物双侧植入上颌和下颌骨体。一旦确认植入物稳定，即开始治疗（先拔除4颗第一前磨牙，然后进行固定矫治器治疗）。通过头影测量评估上颌和下颌植入物的横向变化，并比较两组（GROW+组和GROW++组；根据面部高度和下颌长度的生长变化进行选择）。GROW++组显示上颌后部植入物（P<.001）和下颌植入物（P=.009）的宽度有显著增加；上颌前部植入物无显著变化。GROW+组上颌和下颌植入物之间的宽度无显著变化。我们得出结论：（1）在青春期后期，下颌和上颌基部骨骼结构的宽度有显著增加；（2）宽度变化与生长潜力有关。
