The effect of bonded resin surface area on the detachment force of lingual bonded fixed retainers: An in vitro study
이일홍, 이정환, 박인영, 김지현, 안장훈,
소속 상세정보
이일홍 ( Lee Il-Hong ) - Hallym University Medical Center Hallym University Sacred Heart Hospital Department of Orthodontics
이정환 ( Lee Jung-Hwan ) - Yonsei University College of Dentistry Research Institute of Dental Biomaterials and Bioengineering
박인영 ( Park In-Young ) - Hallym University Medical Center Hallym University Sacred Heart Hospital Department of Orthodontics
김지현 ( Kim Ji-Hyun ) - Hallym University Medical Center Hallym University Sacred Heart Hospital Department of Orthodontics
안장훈 ( Ahn Jang-Hoon ) - Hallym University Medical Center Hallym University Kangnam Sacred Heart Hospital Department of Orthodontics
KMID : 0361920140440010020
Abstract
Objective: The aims of this study were to evaluate the relationship between the detachment force and bonding resin surface are and to determine the resin bonding surface area that would provide adequate bonding strength with minimum resin volume.
Methods: One hundred and sixty human premolars were randomly divided into 4 groups of 40 teeth each. The diameter of the resin surface area in each group was as follows: group 1, 1.5 mm; group 2, 2.5 mm; group 3, 3.5 mm; and group 4, 4.5 mm. Respond Dead Soft straight (length 0.0175 inch) was used to fabricate the retainers, and TransbondTM XT was used to fix the retainers to the tooth surfaces. A pair of teeth was embedded in acrylic blocks for each specimen. Thus, each group comprised 20 samples. Fixed retainers were bonded to the teeth, and vertical force was applied at the middle of wire. The force was measured using a universal testing machine.
Results: The mean value of detachment force was the highest for group 4 (102.38 ± 2.92 N), followed by group 3 (63.54 ± 2.21 N), group 2 (51.95 ± 1.61 N), and group 1 (24.14 ± 1.38 N).
Conclusions: The detachment force of lingual fixed retainers was significantly affected as the area of the resin bonding surface increased. Considering the minimum bonding strength of brackets, a resin bonding surface area with a diameter of 3.5 mm would provide adequate bonding strength.
키워드
Lingual fixed retainer; Surface area; Bonding strength
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