[摘要]目的：研究Jasper Jumper矫治器对儿童安氏Ⅱ1下颌后缩患者颞颌关节的影响。方法：随机选择22例处于生长发育期的安氏Ⅱ1下颌后缩儿童应用Jasper Jumper矫治器治疗，6～8个月后，通过颞下颌关节中位断层片测量、Helkimo指数研究，观察并比较治疗前后儿童颞颌关节改建情况。结果：Jasper Jumper矫治器治疗期间引起TMD的机率为17.6％。治疗7个月后，关节前间隙平均增加0.85mm，中间隙平均减少0.74mm，后间隙平均减少1.01mm，关节前间隙面积平均增加10.96mm2，关节后间隙面积平均减少9.72mm2，说明关节窝发生了适应性改建。结论：Jasper Jumper矫治器治疗安氏Ⅱ1下颌后缩儿童过程中对TMJ产生了一定的影响，使之产生了适应性改建。
[关键词]Jasper Jumper矫治器；儿童安氏Ⅱ1下颌后缩；颞颌关节
[中图分类号]R783.5 [文献标识码]A [文章编号]1008-6455(2004)06-0726-03
Effects of Jasper Jumper appliance on TMJ in growing children with class Ⅱ division 1 malocclusion and mandibular retrusion
LIU Ming-yan, DUAN Yin-zhong, ZHOU Hui-xia,WANG Hai-xue
(Department of Orthodontics, Stomatological College, the Fourth Military Medical University Xi′an 710032, Shaanxi Province, China)
Abstract: Objective To study effects of Jasper Jumper appliance on TMJ in Growing Children with Class II Division 1 Malocclusion and Mandibular Retrusion Methods 22 early Class II Division 1 malocclusion patients were treated with the domestic Jasper Jumper appliance for 6~8 months. All patients were made by TMJ lateral tomograms during treatment. Results At the beginning of Jasper Jumper appliance therapy, temporary mild TMD symptom appeared in 4 patients and Helkimo index increased. After therapy, TMD symtom was relieved. After 6~8 months' active treatment, the distance of medium and posterior glenoid space were decreased 0.74mm and 10.1mm, and that of anterior glenoid fossa space was increased 0.82mm.The anterior space area was increased 10.96mm2 and posterior space area was reduced 9.72mm2,these condyles returned to its former position. Conlusion Initial study revealed that Jasper Jumper appliance therapy seemed not to worsen TMD. It suggested TMJ produces adaptive changes with Jasper Jumper appliance.
Key words： Jasper Jumper appliance；Class II Division 1 Malocclusion；TMJ
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