지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.7
- 수록면
- 214 - 221 (8page)
이용수
초록· 키워드
오류제보하기
Objective: To investigate the effects of reversing the coiling direction of nickeltitanium closed-coil springs (NiTi-CCSs) on the force-deflection characteristics. Methods: The samples consisted of two commercially available conventional NiTi-CCS groups and two reverse-wound NiTi-CCS groups (Ormco-Conventional vs. Ormco-Reverse; GAC-Conventional vs. GAC-Reverse; n = 20 per group). The reverse-wound NiTi-CCSs were directly made from the corresponding conventional NiTi-CCSs by reversing the coiling direction. Tensile tests were performed for each group in a temperature-controlled acrylic chamber (37 ± 1℃). After measuring the force level, the range of the deactivation force plateau (DFP) and the amount of mechanical hysteresis (MH), statistical analyses were performed. Results: The Ormco-Reverse group exhibited a significant shift of the DFP end point toward the origin point (2.3 to 0.6 mm), an increase in the force level (1.2 to 1.3 N) and amount of MH (1.0 to 1.5 N) compared to the Ormco-Conventional group (all p < 0.001), which indicated that force could be constantly maintained until the end of the deactivation curve. In contrast, the GAC-Reverse group exhibited a significant shift of the DFP-end point away from the origin point (0.2 to 3.3 mm), a decrease in the force level (1.1 to 0.9 N) and amount of MH (0.6 to 0.4 N) compared to the GAC-Conventional group (all p < 0.001), which may hinder the maintenance of force until the end of the deactivation curve. Conclusions: The two commercially available NiTi-CCS groups exhibited different patterns of change in the force-deflection characteristics when the coiling direction was reversed.
목차
INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
CONCLUSION
REFERENCES
참고문헌 (20)
참고문헌 신청
Wichelhaus A / 2010 / Mechanical behavior and clinical application of nickeltitanium closed-coil springs under different stress levels and mechanical loading cycles / Am J Orthod Dentofacial Orthop 137:671~678
Bezrouk A / 2014 / Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice / Am J Orthod Dentofacial Orthop 146:319~327
Burstone CJ / 1985 / Chinese NiTi wire--a new orthodontic alloy / Am J Orthod 87:445~452
Miura F / 1986 / The superelastic property of the Japanese NiTi alloy wire for use in orthodontics / Am J Orthod Dentofacial Orthop 90:1~10
Miura F / 1988 / The superelastic Japanese NiTi alloy wire for use in orthodontics. Part III. Studies on the Japanese NiTi alloy coil springs / Am J Orthod Dentofacial Orthop 94:89~96
Bezrouk A / 2014 / Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice / Am J Orthod Dentofacial Orthop 146:319~327
Burstone CJ / 1985 / Chinese NiTi wire--a new orthodontic alloy / Am J Orthod 87:445~452
Miura F / 1986 / The superelastic property of the Japanese NiTi alloy wire for use in orthodontics / Am J Orthod Dentofacial Orthop 90:1~10
Miura F / 1988 / The superelastic Japanese NiTi alloy wire for use in orthodontics. Part III. Studies on the Japanese NiTi alloy coil springs / Am J Orthod Dentofacial Orthop 94:89~96
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UCI(KEPA) : I410-ECN-0101-2020-515-000537779