Obstructive sleep apnea prevalence in subjects with skeletal class II Or Class III with maxillary hypoplasia deformities waiting for orthognathic surgery

Introduction: Nocturnal breathing problems have become more common and cause problems during the day for both those affected by this condition and those around them. These problems are caused in most cases by a decrease in the size of the pharyngeal posterior space, which is associated with various abnormalities of the facial skeleton, and the positioning of the tongue. Purpose: The present study has the purpose to determine the existence of a correlation between different facial skeletal abnormalities and the size of the pharyngeal posterior space. Materials and methods: In the present study we performed the analysis of 131 teleradiographs from the database of the department of orthodontics and dentofacial orthopedics within UMFST “Târgu Mureș” performed on patients in order to perform an orthodontic treatment. Patients range in age from 10 to 21 years. Results: To observe the existence of a link between the median differences in values in the lower pharyngeal space between class I and class II, we used the Mann-Whitney U test to compare median values. Thus, the median value in class I is 0, while the median value in class II is 0.3. It was concluded that this difference is statistically significant (p = 0.02). Conclusion: Patients with skeletal class II have smaller dimensions of the lower pharyngeal space than patients with class I and class III. Patients with skeletal class II have an increased risk compared to those with class I or class III of developing obstructive sleep apnea-hypopnea syndrome during their lifetime.

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Comparison of oropharyngeal airway dimensional changes in patients with skeletal Class II and Class III malocclusions after orthognathic surgery and functional appliance treatment: A systematic review

The Saudi Dental Journal ◽

10.1016/j.sdentj.2021.09.013 ◽

2021 ◽

Author(s):

Feras AlQahtani ◽

Jeny Mary George ◽

Khaled Bishawi ◽

Sam Thomas Kuriadom

Keyword(s):

Systematic Review ◽

Orthognathic Surgery ◽

Class Ii ◽

Class Iii ◽

Functional Appliance ◽

Skeletal Class ◽

Dimensional Changes ◽

Oropharyngeal Airway ◽

Skeletal Class Ii

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Current Trends in Orthognathic Surgery in Poland—A Retrospective Analysis of 124 Cases

Applied Sciences ◽

10.3390/app11146439 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6439

Author(s):

Ewa Zawiślak ◽

Szymon Przywitowski ◽

Anna Olejnik ◽

Hanna Gerber ◽

Paweł Golusiński ◽

...

Keyword(s):

Orthognathic Surgery ◽

Corrective Osteotomy ◽

University Hospital ◽

Class Iii ◽

Facial Skeleton ◽

Skeletal Class ◽

Skeletal Malocclusion ◽

Current Trends ◽

Maxillary Osteotomy ◽

Skeletal Class Ii

The analysis aims at assessing the current trends in orthognathic surgery. The retrospective study covered a group of 124 patients with skeletal malocclusion treated by one team of maxillofacial surgeons at the University Hospital in Zielona Góra, Poland. Various variables were analysed, including demographic characteristics of the group, type of deformity, type of osteotomy used, order in which osteotomy was performed and duration of types of surgery. The mean age of the patients was 28 (ranging from 17 to 48, SD = 7). The group included a slightly bigger number of females (59.7%), with the dominant skeletal Class III (64.5%), and asymmetries were found in 21.8% of cases. Types of osteotomy performed during surgeries were divided as follows: LeFort I, segmental LeFort I, BSSO, BSSO with genioplasty, LeFort I with BSSO, LeFort I with BSSO and genioplasty, segmental LeFort I with BSSO, isolated genioplasty. Bimaxillary surgeries with and without genioplasty constituted the largest group of orthognathic surgeries (49.1%), and a slightly smaller percentage were one jaw surgeries (46.7%). A statistically significant correlation was found between the type of surgery and the skeletal class. In patients with skeletal Class III, bimaxillary surgeries were performed significantly more often than in patients with skeletal Class II (57.5% vs. 20.0%; p = 0.0002). The most common type of osteotomy in all surgeries was bilateral osteotomy of the mandible modo Obwegeser–Epker in combination with Le Fort I maxillary osteotomy (42.7%). The order of osteotomies in bimaxillary surgeries was mandible first in 61.3% of cases. The longest surgery was bimaxillary osteotomy with genioplasty (mean = 265 min), and the shortest surgery was isolated genioplasty (mean = 96 min). The results of the analysis show a significant differentiation between the needs of orthognathic surgery and the types of corrective osteotomy applied to the facial skeleton.

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Anatomical characteristics of mandibular bone in skeletal Class I, II and III patients by using cone beam computed tomography images in an iranian population

Brazilian Dental Science ◽

10.14295/bds.2021.v24i2.2475 ◽

2021 ◽

Vol 24 (2) ◽

Author(s):

Mohammad Zandi ◽

Abbas Shokri ◽

Vahid Mollabashi ◽

Zahed Eghdami ◽

Payam Amini

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Class Ii ◽

Class I ◽

Cone Beam ◽

Class Iii ◽

Anatomical Characteristics ◽

Skeletal Class ◽

Skeletal Class Ii ◽

Ramus Height

Objetive: This study aimed to compare the anatomical characteristics of the mandible in patients with skeletal class I, II and class III disorders using cone beam computed tomography (CBCT). Material and Methods: CBCT scans of patients between 17 to 40 years taken with NewTom 3G CBCT system with 12-inch field of view (FOV) were selected from the archive. Lateral cephalograms were obtained from CBCT scans of patients, and type of skeletal malocclusion was determined (Class I, II or III). All CBCT scans were evaluated in the sagittal, coronal and axial planes using the N.N.T viewer software. Results: The ramus height and distance from the mandibular foramen to the sigmoid notch in class II patients were significantly different from those in skeletal class I (P < 0.005). Distance from the mandibular canal to the anterior border of ramus in class III individuals was significantly different from that in skeletal class I individuals (P < .005). Conclusion: Length of the body of mandible in skeletal class I was significantly different from that in skeletal class II and III patients. Also, ramus height in skeletal class I was significantly different from that in skeletal class II patients. CBCT had high efficacy for accurate identification of anatomical landmarks. Keywords Prognathism; Retrognathism; Mandible; Anatomy; Cone beam computed tomography.

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