Hirschfelder U, Fleischer-Peters A
Poliklinik für Kieferorthopädie, Erlangen.
Fortschr Kieferorthop. 1992 Dec;53(6):313-21. doi: 10.1007/BF02311847.
The amount of overbite reduction and the stability of the results three to 14.5 years post-retention were analysed in a follow-up study of 60 patients who had been treated with functional appliances. To establish therapeutic and posttherapeutic changes in dento-facial relationships, plaster casts and lateral cephalograms were evaluated at the beginning, at the end of treatment and at the follow-up examination. Posttherapeutic deepening of the overbite (> 0.8 mm) was found in 54.2% of the cases, while overbite reduction remained stable in 39%. A number of skeletal and dental factors were found to be involved in overbite reduction and posttreatment deepening. In this connection, changes in the ML-NSL angle, the ML-NL angle and the gonion angle were found to be just as important as the therapeutic and posttherapeutic changes in anterior and posterior facial height and changes in the skeletal pattern. It is emphasized that strict application of retention is of the greatest importance to minimize vertical relapse.
在一项对60名接受功能矫治器治疗的患者的随访研究中，分析了覆合减少量以及保持后3至14.5年结果的稳定性。为确定牙颌面关系的治疗期和治疗后变化，在治疗开始时、治疗结束时以及随访检查时对石膏模型和头颅侧位片进行了评估。在54.2%的病例中发现治疗后覆合加深（>0.8mm），而39%的病例覆合减少保持稳定。发现一些骨骼和牙齿因素与覆合减少及治疗后加深有关。在这方面，发现ML-NSL角、ML-NL角和下颌角的变化与治疗期和治疗后前后面部高度的变化以及骨骼模式的变化同样重要。强调严格应用保持措施对于最大限度减少垂直复发至关重要。
