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Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study

BACKGROUND: Results on the strength and displacement of internal fixation methods for bilateral sagittal split ramus osteotomy are controversial, and some designs have not been adequately studied. Therefore, this study was conducted to compare techniques using bicortical or monocortical screws. MATE...

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Autores principales: Sarkarat, Farzin, Ahmady, Atiye, Farahmand, Farzam, Fateh, Ali, Kahali, Roozbeh, Nourani, Amir, Rakhshan, Vahid
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7688040/
https://www.ncbi.nlm.nih.gov/pubmed/33282151
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author Sarkarat, Farzin
Ahmady, Atiye
Farahmand, Farzam
Fateh, Ali
Kahali, Roozbeh
Nourani, Amir
Rakhshan, Vahid
author_facet Sarkarat, Farzin
Ahmady, Atiye
Farahmand, Farzam
Fateh, Ali
Kahali, Roozbeh
Nourani, Amir
Rakhshan, Vahid
author_sort Sarkarat, Farzin
collection PubMed
description BACKGROUND: Results on the strength and displacement of internal fixation methods for bilateral sagittal split ramus osteotomy are controversial, and some designs have not been adequately studied. Therefore, this study was conducted to compare techniques using bicortical or monocortical screws. MATERIALS AND METHODS: In this in vitro study, 35 sheep hemi-mandibles were randomly assigned to five groups of seven each: fixation using (1) a 13 × 2 screw, (2) two 13 × 2 screws (arranged vertically), (3) three 13 × 2 screws, (4) 1 plate with 4 holes and four monocortical screws, and (5) a Y-shaped plate and five monocortical screws. Specimens underwent vertical forces until failure. Breakage forces and displacements of groups were recorded and compared statistically. Using one-way analysis of variance (ANOVA) with a Tukey's post hoc test and Kruskal–Wallis test. Level of significance was predetermined as 0.05. RESULTS: Strengths of Groups 1–5 were, respectively, 14.43 ± 4.35, 28.00 ± 8.89, 28.29 ± 8.01, 29.43 ± 8.24, and 61.29 ± 12.38 N, respectively (P = 0.000, analysis of variance). The corresponding displacement extents were 7.98 ± 0.04, 7.85 ± 0.26, 8.00 ± 0.00, 7.35 ± 1.73, and 6.79 ± 2.03 mm (P = 0.298, Kruskal–Wallis test). CONCLUSION: Use of a single bicortical screw is the weakest method, while Y-shaped plates might provide the highest strength. Using two or three bicortical screws or 4-hole plates might deliver similar strengths.
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spelling pubmed-76880402020-12-03 Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study Sarkarat, Farzin Ahmady, Atiye Farahmand, Farzam Fateh, Ali Kahali, Roozbeh Nourani, Amir Rakhshan, Vahid Dent Res J (Isfahan) Original Article BACKGROUND: Results on the strength and displacement of internal fixation methods for bilateral sagittal split ramus osteotomy are controversial, and some designs have not been adequately studied. Therefore, this study was conducted to compare techniques using bicortical or monocortical screws. MATERIALS AND METHODS: In this in vitro study, 35 sheep hemi-mandibles were randomly assigned to five groups of seven each: fixation using (1) a 13 × 2 screw, (2) two 13 × 2 screws (arranged vertically), (3) three 13 × 2 screws, (4) 1 plate with 4 holes and four monocortical screws, and (5) a Y-shaped plate and five monocortical screws. Specimens underwent vertical forces until failure. Breakage forces and displacements of groups were recorded and compared statistically. Using one-way analysis of variance (ANOVA) with a Tukey's post hoc test and Kruskal–Wallis test. Level of significance was predetermined as 0.05. RESULTS: Strengths of Groups 1–5 were, respectively, 14.43 ± 4.35, 28.00 ± 8.89, 28.29 ± 8.01, 29.43 ± 8.24, and 61.29 ± 12.38 N, respectively (P = 0.000, analysis of variance). The corresponding displacement extents were 7.98 ± 0.04, 7.85 ± 0.26, 8.00 ± 0.00, 7.35 ± 1.73, and 6.79 ± 2.03 mm (P = 0.298, Kruskal–Wallis test). CONCLUSION: Use of a single bicortical screw is the weakest method, while Y-shaped plates might provide the highest strength. Using two or three bicortical screws or 4-hole plates might deliver similar strengths. Wolters Kluwer - Medknow 2020-08-14 /pmc/articles/PMC7688040/ /pubmed/33282151 Text en Copyright: © 2020 Dental Research Journal http://creativecommons.org/licenses/by-nc-sa/4.0 This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Sarkarat, Farzin
Ahmady, Atiye
Farahmand, Farzam
Fateh, Ali
Kahali, Roozbeh
Nourani, Amir
Rakhshan, Vahid
Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study
title Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study
title_full Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study
title_fullStr Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study
title_full_unstemmed Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study
title_short Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An in vitro study
title_sort comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: an in vitro study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7688040/
https://www.ncbi.nlm.nih.gov/pubmed/33282151
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