Dugoni S A, Lee J S, Varela J, Dugoni A A
University of the Pacific, School of Dentistry, Department of Orthodontics, San Francisco, Calif., USA.
Angle Orthod. 1995;65(5):311-20. doi: 10.1043/0003-3219(1995)065<0311:EMDTPE>2.0.CO;2.
Twenty-five patients who underwent early mixed dentition treatment were evaluated during the following stages: pretreatment (early mixed dentition), phase 2 (early permanent dentition), and postretention (average of 9.5 years). All patients were treated with a removable passive lingual arch. The mandibular incisors were judged to have satisfactory alignment at phase 2 evaluation and had no further orthodontic treatment. Nineteen of 25 cases (76%) demonstrated clinically satisfactory mandibular alignment postretention. Intercanine width decreased in 72% of the cases postretention and arch length decreased in 100% postretention. Intermolar width increased in 18 of 25 (72%) of the cases during treatment and remained stable in 17 of 25 (68%) of the cases. No predictors or associations could be found to help clinicians in determining the long-term prognosis of dental stability.
对25例接受早期混合牙列治疗的患者在以下阶段进行了评估：治疗前（早期混合牙列）、第二阶段（早期恒牙列）和保持后（平均9.5年）。所有患者均采用可摘式被动舌弓进行治疗。在第二阶段评估时，下颌切牙的排列被判定为满意，且无需进一步的正畸治疗。25例中有19例（76%）在保持后下颌排列在临床上令人满意。72%的病例在保持后犬间宽度减小，100%的病例在保持后牙弓长度减小。25例中有18例（72%）在治疗期间磨牙间宽度增加，25例中有17例（68%）保持稳定。未发现有助于临床医生确定牙齿稳定性长期预后的预测因素或关联因素。
