FRⅡ型功能矫治器治疗伴唇习惯的AngleⅡ类错下颌后缩

FR-Ⅱ functional appliance treatment of Angle′sⅡ malocclusion with mandibular retrognathism and lip sucking habit

[目的]观察FRⅡ型功能矫治器治疗生长发育期内AngleⅡ类错下颌后缩和纠正咬下唇不良习惯的临床疗效。[方法]采用FRⅡ型功能矫治器对1例生长发育期内的有伴唇习惯的AngleⅡ类错下颌后缩的患者进行临床治疗,并对治疗前后的头颅侧位片测量结果对比分析。[结果]对患者进行15个月的治疗后,患者咬下唇不良习惯得以纠正,B点在治疗过程中前移,前牙深覆颌、深覆盖得到改善。[结论]FRⅡ型功能矫治器对本患者能有效地纠正咬下唇不良习惯,而且能促进下颌骨向前生长,协调上下颌骨矢状向不调。

[Objective] To evaluate the effects of FR-Ⅱfunctional appliance during the treatment of Mandibular retrognathism Angle′sⅡ growing patient with lip sucking habit.[Methods] FR-Ⅱfunctional appliance was applied for a growing patient with Mandibular retrognathism Angle′sⅡmalocclusion and lip sucking habit.Comparison of the pre-post treatment cephalometric radiograph had been done after FR-Ⅱfunctional appliance was applied for the patient.[Results] The results demonstrated that after 15 month treatment,lip sucking habit was eliminated.After treatment,B point moved forward,deep overbite and overlap were corrected.[Conclusion] FR-Ⅱfunctional appliance can effectively eliminate lip sucking habit,produce greater mandibular growth development,reduce skeletal disharmony and improve facial profile.