Changes in soft tissue profile after mandibular setback surgery in Class III subjects

Abstract The aim of this study was to investigate changes in hard and soft tissue profile after mandibular setback surgery. Lateral cephalograms of 25 Class III subjects were assessed before and 1.5 ± 0.4 years after mandibular setback surgery. Paired t test, Pearson correlation test and linear regr...

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Published in:International journal of oral and maxillofacial surgery 2009-03, Vol.38 (3), p.236-240
Main Authors: Marşan, G, Öztaş, E, Kuvat, S.V, Cura, N, Emekli, U
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Cephalometry
Dentistry
Face
Facial Bones
Female
Follow-Up Studies
Humans
Male
Malocclusion, Angle Class III - surgery
Mandible - surgery
mandibular setback surgery
Maxillofacial Development
Medical sciences
Osteotomy - methods
Otorhinolaryngology. Stomatology
Prognathism - surgery
soft and hard tissues
Statistics, Nonparametric
Surgery
Treatment Outcome
Young Adult
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container_start_page 236
container_title International journal of oral and maxillofacial surgery
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creator Marşan, G
Öztaş, E
Kuvat, S.V
Cura, N
Emekli, U
description Abstract The aim of this study was to investigate changes in hard and soft tissue profile after mandibular setback surgery. Lateral cephalograms of 25 Class III subjects were assessed before and 1.5 ± 0.4 years after mandibular setback surgery. Paired t test, Pearson correlation test and linear regression analysis were used to evaluate the changes in soft tissue profile. Significant changes were found in skeletal (SNB −3.6 ± 0.9°, ANB 3.7 ± 1.0°, overjet 5.0 ± 1.2 and overbite 2.5 ± 1.1 mm, P < 0.001), soft tissue (facial convexity 5.9 ± 1.6°, P < 0.001; labiomental fold 0.6 ± 0.6 mm, P < 0.001; upper and lower lip protrusion 0.5 ± 0.8 mm, P < 0.01; −3.3 ± 1.2 mm, P < 0.001), and upper and lower lip lengths (0.9 ± 1.2 mm, P < 0.01; −1.8 ± 2.1 mm, P < 0.001). Correlations were found between facial convexity and SNB and ANB angles and between upper lip length and SNB and ANB angles. The change in lower lip length was correlated with SNB, ANB, overjet and overbite. Lower lip retrusion was correlated with overjet and a significant correlation was found between the retrusion of lower incisor and lower lip. Mandibular setback surgery was effective in producing an orthognathic profile in adult Class III subjects with mandibular prognathism.
doi_str_mv 10.1016/j.ijom.2008.12.005
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Lateral cephalograms of 25 Class III subjects were assessed before and 1.5 ± 0.4 years after mandibular setback surgery. Paired t test, Pearson correlation test and linear regression analysis were used to evaluate the changes in soft tissue profile. Significant changes were found in skeletal (SNB −3.6 ± 0.9°, ANB 3.7 ± 1.0°, overjet 5.0 ± 1.2 and overbite 2.5 ± 1.1 mm, P < 0.001), soft tissue (facial convexity 5.9 ± 1.6°, P < 0.001; labiomental fold 0.6 ± 0.6 mm, P < 0.001; upper and lower lip protrusion 0.5 ± 0.8 mm, P < 0.01; −3.3 ± 1.2 mm, P < 0.001), and upper and lower lip lengths (0.9 ± 1.2 mm, P < 0.01; −1.8 ± 2.1 mm, P < 0.001). Correlations were found between facial convexity and SNB and ANB angles and between upper lip length and SNB and ANB angles. The change in lower lip length was correlated with SNB, ANB, overjet and overbite. Lower lip retrusion was correlated with overjet and a significant correlation was found between the retrusion of lower incisor and lower lip. 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Lateral cephalograms of 25 Class III subjects were assessed before and 1.5 ± 0.4 years after mandibular setback surgery. Paired t test, Pearson correlation test and linear regression analysis were used to evaluate the changes in soft tissue profile. Significant changes were found in skeletal (SNB −3.6 ± 0.9°, ANB 3.7 ± 1.0°, overjet 5.0 ± 1.2 and overbite 2.5 ± 1.1 mm, P < 0.001), soft tissue (facial convexity 5.9 ± 1.6°, P < 0.001; labiomental fold 0.6 ± 0.6 mm, P < 0.001; upper and lower lip protrusion 0.5 ± 0.8 mm, P < 0.01; −3.3 ± 1.2 mm, P < 0.001), and upper and lower lip lengths (0.9 ± 1.2 mm, P < 0.01; −1.8 ± 2.1 mm, P < 0.001). Correlations were found between facial convexity and SNB and ANB angles and between upper lip length and SNB and ANB angles. The change in lower lip length was correlated with SNB, ANB, overjet and overbite. Lower lip retrusion was correlated with overjet and a significant correlation was found between the retrusion of lower incisor and lower lip. Mandibular setback surgery was effective in producing an orthognathic profile in adult Class III subjects with mandibular prognathism.]]></description><subject>Adult</subject><subject>Biological and medical sciences</subject><subject>Cephalometry</subject><subject>Dentistry</subject><subject>Face</subject><subject>Facial Bones</subject><subject>Female</subject><subject>Follow-Up Studies</subject><subject>Humans</subject><subject>Male</subject><subject>Malocclusion, Angle Class III - surgery</subject><subject>Mandible - surgery</subject><subject>mandibular setback surgery</subject><subject>Maxillofacial Development</subject><subject>Medical sciences</subject><subject>Osteotomy - methods</subject><subject>Otorhinolaryngology. 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Lateral cephalograms of 25 Class III subjects were assessed before and 1.5 ± 0.4 years after mandibular setback surgery. Paired t test, Pearson correlation test and linear regression analysis were used to evaluate the changes in soft tissue profile. Significant changes were found in skeletal (SNB −3.6 ± 0.9°, ANB 3.7 ± 1.0°, overjet 5.0 ± 1.2 and overbite 2.5 ± 1.1 mm, P < 0.001), soft tissue (facial convexity 5.9 ± 1.6°, P < 0.001; labiomental fold 0.6 ± 0.6 mm, P < 0.001; upper and lower lip protrusion 0.5 ± 0.8 mm, P < 0.01; −3.3 ± 1.2 mm, P < 0.001), and upper and lower lip lengths (0.9 ± 1.2 mm, P < 0.01; −1.8 ± 2.1 mm, P < 0.001). Correlations were found between facial convexity and SNB and ANB angles and between upper lip length and SNB and ANB angles. The change in lower lip length was correlated with SNB, ANB, overjet and overbite. Lower lip retrusion was correlated with overjet and a significant correlation was found between the retrusion of lower incisor and lower lip. 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ispartof International journal of oral and maxillofacial surgery, 2009-03, Vol.38 (3), p.236-240
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subjects Adult
Biological and medical sciences
Cephalometry
Dentistry
Face
Facial Bones
Female
Follow-Up Studies
Humans
Male
Malocclusion, Angle Class III - surgery
Mandible - surgery
mandibular setback surgery
Maxillofacial Development
Medical sciences
Osteotomy - methods
Otorhinolaryngology. Stomatology
Prognathism - surgery
soft and hard tissues
Statistics, Nonparametric
Surgery
Treatment Outcome
Young Adult
title Changes in soft tissue profile after mandibular setback surgery in Class III subjects
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