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Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients
Objective The study's objective was to evaluate skeletal changes in 38 skeletal class III patients following mandibular setback surgery using NM-Low Z plasty. Materials and Methods Thirty-eight skeletal class III patients (ANB angle lower than 0) who underwent the NM-Low Z plasty technique fo...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Thieme Medical and Scientific Publishers Pvt. Ltd.
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10329518/ https://www.ncbi.nlm.nih.gov/pubmed/35785823 http://dx.doi.org/10.1055/s-0042-1749364 |
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author | Imampai, Sarunpong Patchanee, Siripatra Klaisiri, Awiruth Chaiprakit, Narissaporn |
author_facet | Imampai, Sarunpong Patchanee, Siripatra Klaisiri, Awiruth Chaiprakit, Narissaporn |
author_sort | Imampai, Sarunpong |
collection | PubMed |
description | Objective The study's objective was to evaluate skeletal changes in 38 skeletal class III patients following mandibular setback surgery using NM-Low Z plasty. Materials and Methods Thirty-eight skeletal class III patients (ANB angle lower than 0) who underwent the NM-Low Z plasty technique for surgical mandibular setback procedure at Thammasat University Hospital between January 2017 and March 2020 were included in the study: 29 patients had two jaw surgeries, and 9 patients had one jaw surgery. An additional 14 patients had genioplasty. Three lateral cephalograms were traced and digitized with Dolphin Imaging software: T0, T1, and T2. The distance between the B-point and the SN7 perpendicular line defined immediate changes after surgery (T1-T0) and stability after surgery (T2-T1). The reliability test included 6 cephalograms retraced after 2-week interval. At point B, the principal result was horizontal movement forward. Statistical Analysis The analysis used paired t -tests. Results The mean mandibular setback was 9.78 mm, and the mean skeletal relapse was 2.61 mm, or 26.69%. Statistical analysis showed postoperative differences ( p < 0.05). Vertical measurement in B-SN7 reduced immediately and postoperatively. Conclusion Postoperatively, the mandible relapsed significantly forward and upward. Rotational relapse is a concern with NM-Low Z plasty in hypo- / normodivergent patients. |
format | Online Article Text |
id | pubmed-10329518 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Thieme Medical and Scientific Publishers Pvt. Ltd. |
record_format | MEDLINE/PubMed |
spelling | pubmed-103295182023-07-09 Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients Imampai, Sarunpong Patchanee, Siripatra Klaisiri, Awiruth Chaiprakit, Narissaporn Eur J Dent Objective The study's objective was to evaluate skeletal changes in 38 skeletal class III patients following mandibular setback surgery using NM-Low Z plasty. Materials and Methods Thirty-eight skeletal class III patients (ANB angle lower than 0) who underwent the NM-Low Z plasty technique for surgical mandibular setback procedure at Thammasat University Hospital between January 2017 and March 2020 were included in the study: 29 patients had two jaw surgeries, and 9 patients had one jaw surgery. An additional 14 patients had genioplasty. Three lateral cephalograms were traced and digitized with Dolphin Imaging software: T0, T1, and T2. The distance between the B-point and the SN7 perpendicular line defined immediate changes after surgery (T1-T0) and stability after surgery (T2-T1). The reliability test included 6 cephalograms retraced after 2-week interval. At point B, the principal result was horizontal movement forward. Statistical Analysis The analysis used paired t -tests. Results The mean mandibular setback was 9.78 mm, and the mean skeletal relapse was 2.61 mm, or 26.69%. Statistical analysis showed postoperative differences ( p < 0.05). Vertical measurement in B-SN7 reduced immediately and postoperatively. Conclusion Postoperatively, the mandible relapsed significantly forward and upward. Rotational relapse is a concern with NM-Low Z plasty in hypo- / normodivergent patients. Thieme Medical and Scientific Publishers Pvt. Ltd. 2022-07-04 /pmc/articles/PMC10329518/ /pubmed/35785823 http://dx.doi.org/10.1055/s-0042-1749364 Text en The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. ( https://creativecommons.org/licenses/by/4.0/ ) https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Imampai, Sarunpong Patchanee, Siripatra Klaisiri, Awiruth Chaiprakit, Narissaporn Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients |
title | Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients |
title_full | Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients |
title_fullStr | Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients |
title_full_unstemmed | Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients |
title_short | Evaluation of Skeletal Changes after Mandibular Setback Surgery Using the NM-Low Z Plasty Technique in Skeletal Class III Patients |
title_sort | evaluation of skeletal changes after mandibular setback surgery using the nm-low z plasty technique in skeletal class iii patients |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10329518/ https://www.ncbi.nlm.nih.gov/pubmed/35785823 http://dx.doi.org/10.1055/s-0042-1749364 |
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