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Torque deformation characteristics of plastic brackets: a comparative study.

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Torque deformation characteristics of plastic brackets: a comparative study. / Sadat-Khonsari, Reza; Moshtaghy, Azita; Schlegel, Volker; Kahl-Nieke, Bärbel; Möller, Mathias; Bauss, Oskar.

In: J OROFAC ORTHOP, Vol. 65, No. 1, 1, 2004, p. 26-33.

Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review

Harvard

Sadat-Khonsari, R, Moshtaghy, A, Schlegel, V, Kahl-Nieke, B, Möller, M & Bauss, O 2004, 'Torque deformation characteristics of plastic brackets: a comparative study.', J OROFAC ORTHOP, vol. 65, no. 1, 1, pp. 26-33. <http://www.ncbi.nlm.nih.gov/pubmed/14749887?dopt=Citation>

APA

Sadat-Khonsari, R., Moshtaghy, A., Schlegel, V., Kahl-Nieke, B., Möller, M., & Bauss, O. (2004). Torque deformation characteristics of plastic brackets: a comparative study. J OROFAC ORTHOP, 65(1), 26-33. [1]. http://www.ncbi.nlm.nih.gov/pubmed/14749887?dopt=Citation

Vancouver

Sadat-Khonsari R, Moshtaghy A, Schlegel V, Kahl-Nieke B, Möller M, Bauss O. Torque deformation characteristics of plastic brackets: a comparative study. J OROFAC ORTHOP. 2004;65(1):26-33. 1.

Bibtex

@article{de5b154697194deba161a92c46da37d9,
title = "Torque deformation characteristics of plastic brackets: a comparative study.",
abstract = "AIM: The purpose of this study was to compare the torque deformation characteristics of seven commercially available plastic brackets, both amongst each other and with stainless steel brackets. MATERIAL AND METHODS: Ten brackets each of (1) pure polycarbonate, (2) ceramic reinforced polycarbonate, (3) fiberglass reinforced polycarbonate, (4) ceramic reinforced polycarbonate with metal slot, (5) fiberglass reinforced polycarbonate with metal slot, (6) polyurethane, and (7) polyurethane with metal slot were exposed to torsion in a torquemeter, following an aging process according to ISO 10477. Ten stainless steel brackets served as a control group. Torsion was applied continuously using a material testing machine (Zwick Z2.5, Zwick Materialpr{\"u}fung, Ulm, Germany). RESULTS: The results showed within the group of plastic brackets that metal slot reinforced brackets were subject to the lowest degree of deformation, followed by the brackets made of pure polyurethane, pure polycarbonate and fiberglass reinforced polycarbonate. The ceramic reinforced polycarbonate brackets showed the highest deformation under torque stress. The plastic deformation of the ceramic reinforced, fiberglass reinforced and pure polycarbonate brackets started even in the recommended torque range of 10-20 Nmm. The additional ceramic and fiberglass in the plastic brackets investigated in this study did not improve the torque stability of the polycarbonate brackets. The pure polyurethane brackets showed no significant difference from the pure polycarbonate brackets at the moment of 15 Nmm which is the optimal torque for a maxillary incisor. CONCLUSION: A comparison with the stainless steel brackets illustrated that plastic brackets are suited for clinical application only if they have a metal slot.",
author = "Reza Sadat-Khonsari and Azita Moshtaghy and Volker Schlegel and B{\"a}rbel Kahl-Nieke and Mathias M{\"o}ller and Oskar Bauss",
year = "2004",
language = "Deutsch",
volume = "65",
pages = "26--33",
journal = "J OROFAC ORTHOP",
issn = "1434-5293",
publisher = "Urban und Vogel",
number = "1",

}

RIS

TY - JOUR

T1 - Torque deformation characteristics of plastic brackets: a comparative study.

AU - Sadat-Khonsari, Reza

AU - Moshtaghy, Azita

AU - Schlegel, Volker

AU - Kahl-Nieke, Bärbel

AU - Möller, Mathias

AU - Bauss, Oskar

PY - 2004

Y1 - 2004

N2 - AIM: The purpose of this study was to compare the torque deformation characteristics of seven commercially available plastic brackets, both amongst each other and with stainless steel brackets. MATERIAL AND METHODS: Ten brackets each of (1) pure polycarbonate, (2) ceramic reinforced polycarbonate, (3) fiberglass reinforced polycarbonate, (4) ceramic reinforced polycarbonate with metal slot, (5) fiberglass reinforced polycarbonate with metal slot, (6) polyurethane, and (7) polyurethane with metal slot were exposed to torsion in a torquemeter, following an aging process according to ISO 10477. Ten stainless steel brackets served as a control group. Torsion was applied continuously using a material testing machine (Zwick Z2.5, Zwick Materialprüfung, Ulm, Germany). RESULTS: The results showed within the group of plastic brackets that metal slot reinforced brackets were subject to the lowest degree of deformation, followed by the brackets made of pure polyurethane, pure polycarbonate and fiberglass reinforced polycarbonate. The ceramic reinforced polycarbonate brackets showed the highest deformation under torque stress. The plastic deformation of the ceramic reinforced, fiberglass reinforced and pure polycarbonate brackets started even in the recommended torque range of 10-20 Nmm. The additional ceramic and fiberglass in the plastic brackets investigated in this study did not improve the torque stability of the polycarbonate brackets. The pure polyurethane brackets showed no significant difference from the pure polycarbonate brackets at the moment of 15 Nmm which is the optimal torque for a maxillary incisor. CONCLUSION: A comparison with the stainless steel brackets illustrated that plastic brackets are suited for clinical application only if they have a metal slot.

AB - AIM: The purpose of this study was to compare the torque deformation characteristics of seven commercially available plastic brackets, both amongst each other and with stainless steel brackets. MATERIAL AND METHODS: Ten brackets each of (1) pure polycarbonate, (2) ceramic reinforced polycarbonate, (3) fiberglass reinforced polycarbonate, (4) ceramic reinforced polycarbonate with metal slot, (5) fiberglass reinforced polycarbonate with metal slot, (6) polyurethane, and (7) polyurethane with metal slot were exposed to torsion in a torquemeter, following an aging process according to ISO 10477. Ten stainless steel brackets served as a control group. Torsion was applied continuously using a material testing machine (Zwick Z2.5, Zwick Materialprüfung, Ulm, Germany). RESULTS: The results showed within the group of plastic brackets that metal slot reinforced brackets were subject to the lowest degree of deformation, followed by the brackets made of pure polyurethane, pure polycarbonate and fiberglass reinforced polycarbonate. The ceramic reinforced polycarbonate brackets showed the highest deformation under torque stress. The plastic deformation of the ceramic reinforced, fiberglass reinforced and pure polycarbonate brackets started even in the recommended torque range of 10-20 Nmm. The additional ceramic and fiberglass in the plastic brackets investigated in this study did not improve the torque stability of the polycarbonate brackets. The pure polyurethane brackets showed no significant difference from the pure polycarbonate brackets at the moment of 15 Nmm which is the optimal torque for a maxillary incisor. CONCLUSION: A comparison with the stainless steel brackets illustrated that plastic brackets are suited for clinical application only if they have a metal slot.

M3 - SCORING: Zeitschriftenaufsatz

VL - 65

SP - 26

EP - 33

JO - J OROFAC ORTHOP

JF - J OROFAC ORTHOP

SN - 1434-5293

IS - 1

M1 - 1

ER -