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
- 2018.11
- 수록면
- 384 - 394 (11page)
이용수
초록· 키워드
오류제보하기
Objective: This study was performed to investigate an appropriate degree of prestretch for orthodontic synthetic elastomeric chains focusing on time-dependent viscoelastic properties. Methods: Orthodontic synthetic elastomeric chains of two brands were prestretched to 50, 100, 150, and 200% of the original length in one and three cycles, and the hysteresis areas of the obtained stress-strain curves were determined. Acrylic plates were employed to maintain constant strain during the experiment. A total of 180 samples were classified into nine groups according to brand, and their stresses and permanent deformations were measured immediately after prestretch (0 hour), after 1 hour and 24 hours, and after 1, 2, 3, 4, 5, 6, 7, and 8 weeks. The relationship between stress relaxation and permanent deformation was investigated for various degrees of prestretch, and the estimated stress resulting from tooth movement was calculated. Results: The degree of prestretch and the stress relaxation ratio exhibited a strong negative correlation, whereas no correlation was found between the degree of prestretch and the average normalized permanent strain. The maximal estimated stress was observed when prestretch was performed in three cycles to 200% of the original length. Conclusions: Although prestretch benefited residual stress, it did not exhibit negative effects such as permanent deformation. The maximal estimated stress was observed at the maximal prestretch, but the difference between prestretch and control groups decreased with time. In general, higher residual stresses were observed for product B than for product A, but this difference was not clinically significant.
목차
INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
CONCLUSION
REFERENCES
참고문헌 (24)
참고문헌 신청
[학술지(정기간행물)] - Halimi A / 2012 / A systematic review of force decay in orthodontic elastomeric power chains / Int Orthod 10 : 223 ~ 240
[학술지(정기간행물)] - Andreasen GF / 1970 / Comparison of alastik chains with elastics involved with intra-arch molar to molar forces / Angle Orthod 40 : 151 ~ 158
[학술지(정기간행물)] - Brantley WA / 1979 / Effects of prestretching on force degradation characteristics of plastic modules / Angle Orthod 49 : 37 ~ 43
[학술지(정기간행물)] - Wong AK / 1976 / Orthodontic elastic materials / Angle Orthod 46 : 196 ~ 205
[학술지(정기간행물)] - Chang HF / 1987 / Effects of instantaneous prestretching on force degradation characteristics of orthodontic plastic modules / Proc Natl Sci Counc Repub China B 11 : 45 ~ 53
[학술지(정기간행물)] - Andreasen GF / 1970 / Comparison of alastik chains with elastics involved with intra-arch molar to molar forces / Angle Orthod 40 : 151 ~ 158
[학술지(정기간행물)] - Brantley WA / 1979 / Effects of prestretching on force degradation characteristics of plastic modules / Angle Orthod 49 : 37 ~ 43
[학술지(정기간행물)] - Wong AK / 1976 / Orthodontic elastic materials / Angle Orthod 46 : 196 ~ 205
[학술지(정기간행물)] - Chang HF / 1987 / Effects of instantaneous prestretching on force degradation characteristics of orthodontic plastic modules / Proc Natl Sci Counc Repub China B 11 : 45 ~ 53
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UCI(KEPA) : I410-ECN-0101-2019-515-000105967