Relationship between occlusal force and condylar morphology in class II and III after bi-maxillary osteotomy

Ueki, Koichiro; Yoshizawa, Kunio; Moroi, Akinori; Tsutsui, Takamitsu; Hotta, Asami; Hiraide, Ryota; Takayama, Akihiro; Tsunoda, Tatsuya; Saito, Yuki; Sato, Momoko; Baba, Nana

doi:10.1016/j.jcms.2018.10.010

Cited by 19 publications

(14 citation statements)

References 35 publications

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“…The occlusal force was measured preoperatively and 1 year postoperatively, using the Dental Prescale System according to previous studies 20,21. Intra class correlation coefficients >0.92 indicated high consistency and reproducibility.…”

Section: Methodsmentioning

confidence: 99%

Change in CT Value at Mandibular Ramus After Mandibular Setback and Advancement Surgery With Bicortical Absorbable Plate Fixation

Ueki

Moroi

Takayama

et al. 2023

Journal of Craniofacial Surgery

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Purpose: This study aimed to evaluate changes in computed tomography (CT) value of ramus bone after sagittal split ramus osteotomy (SSRO) in class II and class III patients using absorbable plates and screws. Patients and Methods: In the retrospective study, the participants were female patients with jaw deformities who underwent bilateral SSRO with Le Fort I osteotomy. Maximum CT values (pixel values) of lateral and medial cortexes at anterior and posterior sites of the ramus were measured preoperatively and 1 year postoperatively by using horizontal planes at the mandibular foramen level (upper level) and 10 mm under the mandibular foramen level (lower level) parallel to Frankfurt horizontal plane. Results: Fifty-seven patients and 114 sides (28 class II: 56 sides and 29 class III: 58 sides) were evaluated. Although CT values decreased at most sites of the ramus cortical bone after 1 year of surgery, they increased at the posterior-medial site at the upper level in class II (P=0.0012) and the lower level in class III (P=0.0346). Conclusion: This study suggested that bone quality at the mandibular ramus could change after 1 year of surgery, and there could be differences between mandibular advancement and setback surgery.

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Section: Methodsmentioning

confidence: 99%

Change in CT Value at Mandibular Ramus After Mandibular Setback and Advancement Surgery With Bicortical Absorbable Plate Fixation

Ueki

Moroi

Takayama

et al. 2023

Journal of Craniofacial Surgery

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“…Nasal airways of 35 cases (70 sides) were measured with CT before surgery and after 1-year surgery, in similar method previously published 23,24 …”

Section: Methodsmentioning

confidence: 99%

“…Nasal airways of 35 cases (70 sides) were measured with CT before surgery and after 1-year surgery, in similar method previously published. 23,24 The nasal airway area was measured in three coronal planes across anterior nasal spine (ANS), posterior nasal spine (PNS) and midpoint between ANS and PNS perpendicular to Frankfurt horizontal plane in each side. The coronal area at the ANS was defined as all regions of the nostril.…”

Section: Computed Tomography Assessmentmentioning

confidence: 99%

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Evaluation of Nasal Function and Upper Airway Morphology After Bi-Maxillary Surgery Using Rhinomanometry and Computed Tomography

Tsutsui

Moroi

Yoshizawa

et al. 2021

Journal of Craniofacial Surgery

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This study was performed to evaluate changes in nasal airflow, nasal airway resistance, nasal cross-sectional area, pharyngeal horizontal area, nasopharyngeal and oropharyngeal volume following Le Fort I osteotomy (L1) impaction with sagittal split ramus osteotomy (SSRO) in classes II and III. Materials and Methods: The subjects consisted of 35 patients (6 males and 29 females, 70 sides) 17 of which were diagnosed as class II and 18 as class III who underwent L1 and SSRO. Nasal airflow and resistance were measured using the rhinomanometry system (GM NR-6 EXECUTIVE) before and at 1 and 6 months after surgery. Nasal, cross-sectional area, and volume were measured using a 3-dimensional computed tomography respectively, before and 1-year after surgery. Results: Although a significant decrease was found in nasal volume after surgery (P ¼ 0.0042), there was no difference between before and after surgery in the nasal airway resistance in class II.A significant decrease in nasal volume was found after surgery (P ¼ 0.0005) and there were no postoperative changes in both nasal airflow and resistance in class III. Conclusion:The study suggested that L1 impaction with SSRO did not worsen nasal function such as nasal airflow and nasal airway resistance, although nasal volume significantly decreased in both groups.

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“…An assessment developed by the Institute of Health Economics 21 was used to determine the quality of the 10 before-after studies. [22][23][24][25][26][27][28][29][30][31] This quality assessment tool comprises 20 criteria. Due to not being relevant, two criteria concerning additional interventions and adverse events were considered not applicable and omitted.…”

Section: Ta B L Ementioning

confidence: 99%

Assessment of masticatory performance in patients undergoing orthognathic surgery: A systematic review and meta‐analysis

Bunpu

Changsiripun

2023

J of Oral Rehabilitation

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Background One of the main goals of orthognathic surgery is to improve the masticatory performance in patients with maxillofacial deformities. Objective The aim of this study was to evaluate the literature on assessing masticatory performance before, after orthognathic surgery and normal occlusion. Methods An electronic search was performed via Pubmed, Scopus, LILACs and Web of Science without any restrictions until June 2022. The articles assessing masticatory performance using a comminution assay, bite force or occlusal contact area in patients undergoing orthognathic surgery with or without comparing controls were included. The risk of bias of the selected articles was assessed using the appropriate tools according to the study design. Results Of the 2507 records identified, 21 studies were included in the qualitative evaluation and 17 studies in the meta‐analysis. Nine articles were cohort studies, and the other eight were before–after studies. Moderate to high risks of bias were found among the articles. Comparing the values before and after surgery, the meta‐analysis revealed a significant improvement in the bite force and occlusal contact area at 1‐ and 2‐year post‐surgery. However, regardless of the assessed parameters, the masticatory performance in patients with normal occlusion was significantly greater than those in patients undergoing orthognathic surgery at all evaluated time points. Conclusion Although combined surgical orthodontic treatment can improve impaired masticatory function, assessed by the comminution method, bite force and occlusal contact area, the improvement may not reach that of normal occlusion.

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Relationship between occlusal force and condylar morphology in class II and III after bi-maxillary osteotomy

Cited by 19 publications

References 35 publications

Change in CT Value at Mandibular Ramus After Mandibular Setback and Advancement Surgery With Bicortical Absorbable Plate Fixation

Change in CT Value at Mandibular Ramus After Mandibular Setback and Advancement Surgery With Bicortical Absorbable Plate Fixation

Evaluation of Nasal Function and Upper Airway Morphology After Bi-Maxillary Surgery Using Rhinomanometry and Computed Tomography

Assessment of masticatory performance in patients undergoing orthognathic surgery: A systematic review and meta‐analysis

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