THE EFFECT OF DISTAL MOVEMENT OF UPPER MOLAR USING THE PENDULUM APPLIANCE

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Journal of the Korean Academy of Pediatric Dentistry 2001;28(3):488-495.
Published online August 31, 2001.

THE EFFECT OF DISTAL MOVEMENT OF UPPER MOLAR USING THE PENDULUM APPLIANCE

Pendulum 장치의 상악대구치의 원심이동에 대한 효과

이창섭, 김재광, 강덕일, 송광철, 정현구, 이상호

조선대학교 치과대학 소아치과학교실, 구강생물학연구소

Abstract

Treatment of class II malocclusions require distalization of maxillary molars into class I relationship. Intraarch distal molar movement techniques have recently assumed an important role in young patients. In this study, the dental and skeletal effects of the pendulum appliance were evaluated by means of cephalometric radiographs. The samples were consisted of 19 patients: 11 females and 8 males, mean age 11.68±1.52 years. Measurements were obtained from cephalometric prior to and the day of removal of the pendulum appliance. Treatment changes were analyzed. The following results were obtain. 1. The pendulum appliance produced 2.94±1.54mm distal molar movement with a mean intrusion of 1.17±0.97mm, mean period 18.13±7.95 weeks. 2. The anchor tooth was 1.34±1.40mm forward movement and 0.48±0.99mm extrusion, and labial tilting of incisors. 3. The angle between palatal plane and mandibular plane increased significantly. 4. There was no significant difference in according to 2nd molar position. 5. Total movement was consisted of 74% distal movement of 1st molar and 26% forward movement of the anchor tooth.

Key Words: Class II malocclusion, Distal molar movement, Pendulum appliance