COMPARATIVE STUDY OF PHYSICAL PROPERTIES FOR VARIOUS BAND CEMENTS

Yang, Kyu-Ho; Kim, Ki-Baek; Kim, Seon-Mi; Choi, Nam-Ki

Journal of the Korean Academy of Pediatric Dentistry 2009;36(3):427-432.
Published online August 31, 2009.

COMPARATIVE STUDY OF PHYSICAL PROPERTIES FOR VARIOUS BAND CEMENTS

Kyu-Ho Yang, Ki-Baek Kim, Seon-Mi Kim, Nam-Ki Choi

Department of Pediatric Dentistry, School of Dentistry, Chonnam National University, and Dental Research Institute and second stage of BK 21

수종의 밴드 접착 시멘트의 물성에 대한 비교 연구

양규호, 김기백, 김선미, 최남기

전남대학교 치의학전문대학원 소아치과학교실, 치의학연구소 및 BK21 사업단

Correspondence: Kyu-Ho Yang, Tel: 062-530-5660, Email: hellopedo@hanmail.net

Received: 23 February 2009 • Accepted: 8 August 2009

Abstract

The aim of this study was to compare the shear-peel strength and the fracture site of 5 commercially available orthodontic band cements. One hundred molar bands were cemented to extracted human 3rd molars. The specimens were prepared in accordance with the manufacturer's instructions for each cement. After storage in a humidor at 37℃ for 24 hours, the shear debonding force was assessed for each specimen using an universal testing machine with crosshead speed of 2 mm/minute. Maximal failure stress was converted to mean shearpeel strength, MPa. The predominant site of band failure was recorded visually for all specimens as either at the band/cement or cement/enamel interface. Mean shear-peel strength of Ormco was the highest(2.44±0.57), followed by Fuji Ortho^TM(2.24±0.50), Ketac-Cem^TM(2.10±0.57), 3M Unitek^TM(1.82±0.43), Band-Lok^TM(1.73±0.28). There were statistically significant differences between Ormco and Band-Lok^TM, Ormco and 3M Unitek^TM, and Fuji Ortho^TM and Band- Lok^TM(p<0.05). The predominant site of bonding failure for bands cemented with the Ormco was at the band/cement interface, whereas bands cemented with Ultra Band-Lok^TM failed predominantly at the enamel/cement interface. There was no significant difference among the other cements(Fuji Ortho^TM, 3M Unitek^TM, Ketac-Cem^TM).

Key Words: Orthodontic band, Cement, Shear-peel bond strength, Failure site