3-D Airway Analysis Related to Facial Morphology

Ravelo, Victor; Olate, Gabriela; Moya, María Paz; Brito, L. T. de L.; Garay, Ivonne; Olate, Sergio

doi:10.4067/s0717-95022020000200423

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…However, the association between nasal septum deviation and facial asymmetries has been reported (Hafezi et al, 2010), This may lead to a hypothesis associated with the impact of nasal septum deformity and facial deformities. Previous studies have shown that subjects with a class III skeletal deformity have a higher airway volume than other subjects (Ravelo et al, 2020); however, information regarding the nasal apparatus is limited. The aim of this study was to identify septal deviations and changes in the inferior nasal concha bone in subjects with a class III facial deformity.…”

Section: Introductionmentioning

confidence: 99%

Nasal Septum Deviation and Inferior Nasal Concha Bone Hypertrophy in Class III Facial Deformity

et al. 2020

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The aim of this research was to analyze the morphology of the nasal septum and inferior nasal concha bone in class III facial deformities prior to orthodontic treatment in orthognathic surgery candidates. 40 subjects were included in this research. The inclusion criteria were an Angle class III, negative overjet and SNA angle less than 80º. Patients with facial asymmetry, facial trauma or who had undergone maxillofacial or ENT procedures were excluded. CBCT images were obtained for all the patients and the nasal septum deviation, morphology of inferior nasal concha bone and ostium of the maxillary sinus were analyzed and related to the complexity of the facial deformity expressed by the ANB angle and dental relations. The measurement was standardized by ICC and the data was analyzed using a chi square test and Spearman's coefficient with a p value < 0.005 for statistical significance. Nasal septal deviation was observed in 77.5 %. The deviation angle was 13.28º (±4.68º) and the distance from the midline to the most deviated septum was 5.56 mm (±1.8 mm) with no statistical relation to the complexity of the facial deformity. The deviated nasal septum showed inferior nasal concha bone hypertrophy on the concave side of the nasal septum deviation (p=0.049). The open or closed condition of the maxillary sinus ostium was not related to any conditions in the septum or complexity of the facial deformity. Inferior nasal concha bone hypertrophy could be related to nasal septal deviation. The nasal condition in a class III facial deformity could not differ from the general population; careful in orthognathic surgery as to be assume in the Le Fort I Osteotomy and nasal approach related to nasal septum deviation and inferior nasal concha bone.

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Section: Introductionmentioning

confidence: 99%

Nasal Septum Deviation and Inferior Nasal Concha Bone Hypertrophy in Class III Facial Deformity

et al. 2020

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“…The maxillo-mandibular structures are modified by the development and growth in three dimensions and can be related to anatomical changes, such as the volume and shape of the airway [ 1 ]. Changes in the middle and lower third of the face with clockwise or counterclockwise rotation of the mandible are related to the position of the hyoid bone, the morphology of the facial thirds and the pharyngeal spaces [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Retrospective Analysis of the Airway Space Changes in Dentofacial Deformity after Two-Jaw Orthognathic Surgery Using Cone Beam Computed Tomography

Ravelo,

Olate,

Unibazo

et al. 2023

JPM

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Orthognathic surgery is used to modify anomalies in maxillomandibular position; this process can significantly affect the anatomy of the airway and cause functional changes. This study aims to define the impact of mandibular maxillary movement on the airway of subjects with dentofacial deformity. A retrospective study was conducted on subjects with Angle class II (CII group) and Angle class III (CIII group) dentofacial deformities. The subjects were treated via bimaxillary surgery; for all of them, planning was performed with software and 3D printing. Cone beam computed tomography (CBCT) was obtained 21 days before surgery and 6 months after surgery and was used for planning and follow-up with the same conditions and equipment. Was used the superimposition technique to obtain the maximum and minimum airway areas and total airway volume. The data were analyzed with the Shapiro–Wilk test and Student’s t-test, while Spearman’s test was used to correlate the variables, considering a value of p < 0.05. Thus, 76 subjects aged 18 to 55 years (32.38 ± 10.91) were included: 46 subjects were in CII group, treated with a maxillo-mandibular advancement, and 30 subjects were in the CIII group, treated with a maxillary advancement and a mandibular setback. In the CII group, a maxillary advancement of +2.45 mm (±0.88) and a mandibular advancement of +4.25 mm (±1.25) were observed, with a significant increase in all the airway records. In the CIII group, a maxillary advancement of +3.42 mm (±1.25) and a mandibular setback of −3.62 mm (±1.18) were noted, with no significant changes in the variables measured for the airway (p > 0.05). It may be concluded that maxillo-mandibular advancement is an effective procedure to augment the airway area and volume in the CII group. On the other hand, in subjects with mandibular prognathism and Angle class III operated with the maxillary advancement and mandibular setback lower than 4 mm, it is possible to not reduce the areas and volume in the airway.

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“…La cirugía ortognática se incluye dentro de los protocolos internacionalmente validados para el manejo de la apnea del sueño (Liu et al, 2019); estudios previos de nuestro grupo han determinado que la morfología de la VA se vincula a la morfología facial (Ravelo et al 2020) de forma que la modificación de la estructura implica cambios en la vía aérea; de la misma forma, se ha observado que los métodos de análisis y estudios de la VA no son relacionados con los métodos cefalométricos (Ravelo et al 2021a), instalando algunas dudas respecto de la forma de medir y diagnosticar las condiciones de vía aérea.…”

Section: Introductionunclassified

“…Es claro que sujetos con deformidades faciales de clase II presentan un reducido volumen de la VA y que sujetos con deformidad facial de clase III presentan en su mayoría un amplio volumen de vía aérea (Ravelo et al, 2020); se ha señalado también que, actualmente, la cirugía ortognática presenta una clara tendencia hacia el avance facial (Ravelo et al, 2021b), lo cual debe mejorar condiciones de la VA; sin embargo, en casos de retroceso mandibular la vía aérea puede reducirse lo cual puede ser complejo en casos de patología del sueño. El objetivo de este trabajo fue identificar el cambio de la VA generado en sujetos sometidos a cirugía ortognática bimaxilar.…”

Section: Introductionunclassified