Evaluation of Speech Quality of Skeletal Class III Patients before and after Orthognathic Surgery.

ABSTRACT Objective: To evaluate the effect of postoperative condylar axis changes on mandibular condylar remodeling by comparing the condylar head in three-dimensional (3D) surface reconstructions before and after surgery in skeletal Class III deformities (one-jaw [mandibular setback] or two-jaw surgery), and also to determine the relationship between condylar inward rotation and condylar surface remodeling after orthognathic surgery. Materials and Methods: A retrospective analysis was conducted of 30 patients with skeletal Class III deformities who had received orthognathic surgery. Group 1 underwent one-jaw surgery (10 men, five women, age 22.4 ± 3.3 years), and group 2 underwent two-jaw surgery (10 men, five women, age 22.3 ± 2.2 years). Sixty condyles were reconstructed and superimposed pre- and postoperatively to compare the changes of condylar surfaces. The relation between the condylar axis change and the surface change using the Pearson correlation were investigated from the 3D image software. Results: Condylar surface changes before and after the surgery were significant. The postoperative inward rotation of the condyles was correlated with the average absolute deviation of the condyles, regardless of the surgery type (one- or 2-jaw surgery; r = .70, P < .05). Conclusion: After orthognathic surgery, condylar surface changes occurred, and condylar inward rotation was closely related to changes of condylar surface.

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Changes in the Duration of the Chewing Cycle in Patients With Skeletal Class III With and Without Asymmetry Before and After Orthognathic Surgery

Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.joms.2008.06.018 ◽

2009 ◽

Vol 67 (1) ◽

pp. 67-72 ◽

Cited By ~ 11

Author(s):

Koichiro Ueki ◽

Kohei Marukawa ◽

Yukari Hashiba ◽

Kiyomasa Nakagawa ◽

Kagan Degerliyurt ◽

...

Keyword(s):

Orthognathic Surgery ◽

Class Iii ◽

Skeletal Class ◽

Before And After

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Changes in electric activity of masseter and anterior temporalis muscles before and after orthognathic surgery in skeletal class III patients

Oral Surgery Oral Medicine Oral Pathology and Oral Radiology ◽

10.1016/j.oooo.2013.06.008 ◽

2013 ◽

Vol 116 (4) ◽

pp. 398-401 ◽

Cited By ~ 9

Author(s):

Gianluigi Frongia ◽

Guglielmo Ramieri ◽

Corrado De Biase ◽

Pietro Bracco ◽

Maria Grazia Piancino

Keyword(s):

Orthognathic Surgery ◽

Electric Activity ◽

Class Iii ◽

Skeletal Class ◽

Before And After ◽

Anterior Temporalis

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Observation of Lingual Articulation of Skeletal Class III Asymmetry Cases Before and After Orthognathic Surgery

The Japanese Journal of Jaw Deformities ◽

10.5927/jjjd1991.4.1 ◽

1994 ◽

Vol 4 (1) ◽

pp. 1-14

Author(s):

TOSHIHIKO AOUDA ◽

JUNJI SUGAWARA ◽

MITSUHIKO KAWAUCHI ◽

YUICHIRO OOMORI ◽

HIDEO MITANI ◽

...

Keyword(s):

Orthognathic Surgery ◽

Class Iii ◽

Skeletal Class ◽

Before And After

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Postsurgical Stability of Temporomandibular Joint of Skeletal Class III Patients Treated with 2-Jaw Orthognathic Surgery via Computer-Aided Three-Dimensional Simulation and Navigation in Orthognathic Surgery (CASNOS)

BioMed Research International ◽

10.1155/2021/1563551 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Ling-Chun Wang ◽

Yi-Hao Lee ◽

Chi-Yu Tsai ◽

Te-Ju Wu ◽

Ya-Ying Teng ◽

...

Keyword(s):

Orthognathic Surgery ◽

Three Dimensional ◽

Class Iii ◽

Skeletal Class ◽

Computer Aided ◽

Before And After ◽

Bimaxillary Orthognathic Surgery ◽

The Mean ◽

Dimensional Simulation ◽

The Right

Objective. The aim of this study is to clarify the postsurgical stability of temporomandibular joints in skeletal class III patients treated with 2-jaw orthognathic surgery which was performed utilizing computer-aided three-dimensional simulation and navigation in orthognathic surgery (CASNOS) protocol. Materials and Methods. 23 consecutive nongrowing skeletal class III patients with mandibular prognathism associated with maxillary retrognathism treated with 2-jaw orthognathic surgery between 2018 and 2019 were enrolled in this study. The surgery was planned according to the standardized protocol of CASNOS (computer-aided three-dimensional simulation and navigation in orthognathic surgery). Computed tomography (CT) scans were performed in all patients 3 weeks presurgically and 6 months postsurgically. ITKSNAP and 3D Slicer software were used to reconstruct three-dimensional facial skeletal images, to carry out image segmentation, and to superimpose and quantify the TMJ position changes before and after surgery. Amount of displacement of the most medial and lateral points of the condyles and the change of intercondylar angles were measured to evaluate the postsurgical stability of TMJ. Results. A total amount of 23 skeletal class III patients female : male = 12 : 11 with age ranged from 20.3 to 33.5 years (mean: 24.39 ± 4.8 years old ) underwent Le Fort I maxillary advancement and BSSO setback of the mandible. The surgical outcome revealed the satisfactory correction of their skeletal deformities. The mean displacement of the right most lateral condylar point (RL-RL ′ ) was 1.04 ± 0.42 mm and the mean displacement of the left most lateral condylar point (LL-LL ′ ) was 1.19 ± 0.41 mm . The mean displacement of the right most medial condylar point (RM-RM ′ ) was 1.03 ± 0.39 mm and the left most medial condylar point (LM-LM ′ ) was 0.96 ± 0.39 mm . The mean intercondylar angle was 161.61 ± 5.08 ° presurgically and 159.28 ± 4.92 ° postsurgically. Conclusion. The postsurgical position of TM joint condyles in our study only presented a mild change with all the landmark displacement within a range of 1.2 mm. This indicates the bimaxillary orthognathic surgery via 3D CASNOS protocol can achieve a desired and stable result of TMJ position in treating skeletal class III adult patients with retrognathic maxilla and prognathic mandible.

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