The structural change in the hyoid bone and upper airway after orthognathic surgery for skeletal class III anterior open bite patients using 3-dimensional computed tomography

2009 ◽  
Vol 39 (2) ◽  
pp. 72 ◽  
Author(s):  
Yoon-seob Lee ◽  
Hyoung-seon Baik ◽  
Kee-joon Lee ◽  
Hyung-seog Yu
Keyword(s):  
Computed Tomography ◽  
Structural Change ◽  
Orthognathic Surgery ◽  
Hyoid Bone ◽  
Upper Airway ◽  
Open Bite ◽  
Class Iii ◽  
Anterior Open Bite ◽  
Skeletal Class ◽  
3 Dimensional

scholarly journals Periodontally compromised severe skeletal Class III with open bite corrected by orthodontic camouflage using temporary anchorage devices

2020 ◽  
Vol 10 ◽  
pp. 253-258
Author(s):  
Adith Venugopal ◽  
M. Srirengalakshmi ◽  
Anand Marya ◽  
Paolo Manzano
Keyword(s):  
Orthognathic Surgery ◽  
Treatment Options ◽  
Open Bite ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Anterior Open Bite ◽  
Skeletal Class ◽  
Temporary Anchorage Devices ◽  
Anterior Teeth ◽  
Facial Esthetics

A variety of treatment options may be implemented on a Class III malocclusion associated with skeletal discrepancy ranging from functional orthopedics at an early age to orthognathic surgery in adults. In the current scenario, many Class III malocclusion patients are referred for orthognathic surgery without even considering the options of an orthodontic camouflage, as orthodontists do not want to burden themselves with the tedious treatment planning and risks involved with treating such cases. This case report describes a 27-year-old female diagnosed with a skeletal Class III malocclusion, severe open bite, and periodontally compromised dentition. Although orthognathic surgery was proposed as the best treatment modality, it was denied by the patient due to financial and psychological constraints. She was treated with mild upper arch expansion using archwires and upper premolar intrusion using temporary anchorage devices (TADs) alongside retraction of lower anterior teeth using TADs and intermaxillary elastics. At the end of 18 months of active treatment, a decent result was achieved with good occlusion and facial esthetics. Post-treatment results showed an improved profile and Class I canine relationships, with optimal overjet and overbite. The anterior open bite was corrected, and the overall facial balance was greatly improved. Extraoral photographs displayed a relaxed lip closure and an esthetic smile meeting the patient’s expectations. Two-year follow-up records demonstrated a stable occlusion and optimal facial esthetics.

Skeletal class III and anterior open bite treatment with different retention protocols: a report of three cases

2012 ◽  
Vol 39 (3) ◽  
pp. 212-223 ◽  
Author(s):  
Milton Meri Benitez Farret ◽  
Marcel Marchiori Farret ◽  
Alessandro Marchiori Farret
Keyword(s):  
Open Bite ◽  
Class Iii ◽  
Anterior Open Bite ◽  
Skeletal Class

Upper Airway 3D Changes of Patients With Cleft Lip and Palate After Orthognathic Surgery

2018 ◽  
Vol 56 (3) ◽  
pp. 314-320 ◽  
Author(s):  
Marilia Sayako Yatabe-Ioshida ◽  
Letícia Dominguez Campos ◽  
Renato Yassukata Yaedu ◽  
Ivy Kiemle Trindade-Suedam
Keyword(s):  
Orthognathic Surgery ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Upper Airway ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Class Iii ◽  
Linear Measurements ◽  
Cross Sectional ◽  
Skeletal Class

Objectives: The purpose of this study was to 3-dimensionally assess the airway characteristics of patients with unilateral cleft lip and palate (UCLP) and bilateral cleft lip and palate (BCLP) who underwent orthognathic surgery. Design: This was a retrospective study. Setting: The study took place at a national referral center for cleft lip and palate rehabilitation. Patients and Participants: The sample comprised cone-beam computed tomography (CBCT) scans obtained before and after orthognathic surgery of 15 individuals (30 CBCT scans), divided into 2 groups: UCLP group (n = 9 patients/18 CBCT scans) and BCLP group (n = 6/12 CBCT scans). All patients had a nonsyndromic UCLP or BCLP and a skeletal class III malocclusion at the preoperative period. Interventions: Airway volume, pharyngeal minimal cross-sectional area (mCSA), location of mCSA, sella-nasion-A point (SNA) and sella-nasion-B point (SNB) angles, and condylion-A point and condyloid-gnathion linear measurements were assessed in open-source software (ITK-SNAP and SlicerCMF). Main Outcome Measure: Airway dimensions of patients with UCLP and BCLP increase after orthognathic surgery. Results: After orthognathic surgery, UCLP group showed a significant 20% increase in nasopharynx volume. Although not significant, BCLP group also showed an increase of 18% in the same region. Minimal cross-sectional area remained dimensionally stable after surgery and was all located in the oropharynx region, on both groups. Additionally, a positive correlation was observed between volume and mCSA on both groups. Conclusion: Overall, individuals with UCLP and BCLP showed an increase in the upper airway after orthognathic surgery and this might explain the breathing and sleep improvements reported by the patients after the surgery.

Frontal soft tissue analysis using a 3 dimensional camera following two-jaw rotational orthognathic surgery in skeletal class III patients

2014 ◽  
Vol 42 (3) ◽  
pp. 220-226 ◽  
Author(s):  
Jong Woo Choi ◽  
Jang Yeol Lee ◽  
Tae-Suk Oh ◽  
Soon Man Kwon ◽  
Sung Joon Yang ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Orthognathic Surgery ◽  
Tissue Analysis ◽  
Class Iii ◽  
Skeletal Class ◽  
3 Dimensional

scholarly journals Nonsurgical treatment of a hyperdivergent skeletal Class III patient with mini-screw–assisted mandibular dentition distalization and flattening of the occlusal plane

2021 ◽  
Author(s):  
Yiruo He ◽  
Yangyang Wang ◽  
Xinghai Wang ◽  
Jiangyue Wang ◽  
Ding Bai ◽  
...  
Keyword(s):  
Treatment Plan ◽  
Open Bite ◽  
Nonsurgical Treatment ◽  
Occlusal Plane ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Anterior Open Bite ◽  
Skeletal Class ◽  
Posterior Crossbite ◽  
Mandibular Plane

ABSTRACT Treatment of hyperdivergent skeletal Class III malocclusion is challenging for orthodontists, and orthognathic-orthodontic treatment is usually required. This report presents the successful nonsurgical treatment of a 20-year-old man who had a skeletal Class III malocclusion with anterior open bite, anterior and posterior crossbite, hyperdivergent growth pattern, steep occlusal plane, early loss of three first molars, and an uncommon convex profile with a retruded chin. An orthodontic camouflage treatment plan was chosen based on the etiology and the patient's complaints. Tooth #37 was extracted. Miniscrews were used for uprighting and intruding of the lower molars, distalization of the lower dentition, and flattening of the occlusal plane. After 34 months of active treatment, Class I relationships, proper anterior overjet and overbite, flat occlusal plane, and an esthetic facial profile were achieved. The results demonstrated that the biomechanics involved in the nonsurgical treatment assisted with miniscrews to distalize the mandibular dentition and flatten the occlusal plane while keeping the mandibular plane stable was effective for treating this hyperdivergent skeletal Class III patient with a convex profile and anterior open bite.

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