Assessment of upper airways measurements in patients with mandibular skeletal Class II malocclusion

Silva, Nayanna Nadja e; Lacerda, Rosa Helena Wanderley; Silva, Alexandre Wellos Cunha; Ramos, Tânia Braga

doi:10.1590/2177-6709.20.5.086-093.oar

Cited by 27 publications

(23 citation statements)

References 21 publications

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“…The results of the present study demonstrate that in patients with skeletal class II, there is a decrease in the size of the upper airways compared to patients with class I and III. (Silva, Lacerda, Silva, & Ramos, 2015) These results are consistent with other studies in this area (M Kirjavainen; & Turkka, 2007), but a direct link only between this skeletal abnormality and sleep apnea cannot be deduced, even though it has been shown that a decrease in mandibular body length was found in patients with OSA (Joanna, Johal, & Kotecha 2000). Mandibular advancement alone is unlikely to be succesfull (Anaesth, 1989).…”

Section: Discussionsupporting

confidence: 89%

Interrelationships Between the Posterior Pharyngeal Space and the Dento-Maxillary Anomalies

Radu

Cosmin

Hilda

et al. 2021

ESJ

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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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Section: Discussionsupporting

confidence: 89%

Interrelationships Between the Posterior Pharyngeal Space and the Dento-Maxillary Anomalies

Radu

Cosmin

Hilda

et al. 2021

ESJ

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“…Some cephalometric values are related to an increase or decrease in mandibular angles, sagittal differences in the maxilla and mandible, and differences in facial height, involving functional changes in the oral and nasal systems [ 6 ] together with occlusal alterations [ 7 ]. Furthermore, changes in the airway can also be observed with these morphological characteristics [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

The Airway Volume Related to the Maxillo-Mandibular Position Using 3D Analysis

Ravelo

Olate

Muñoz

et al. 2021

BioMed Research International

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Objective. The aim of this research was to compare three cephalometric analyses and their correlation with the airway volume in subjects with different skeletal classes using 2D and 3D images. Study Design. Cross-sectional descriptive study. Material and Method. Steiner, McNamara, and Ricketts analyses and the airway volume were compared in 115 subjects who were candidates for orthognathic surgery under diagnosis using cone beam computed tomography (CBCT); 46 males (40%) and 69 females (60%) were included. The sagittal positions of the maxilla and mandible, the angulation of the mandibular plane, the sagittal positions of the upper and lower incisors, measurements of the largest or shortest airway area, and the volume were compared using Spearman’s test considering a p value < 0.05. Results. Differences were observed between the Steiner and McNamara techniques for the sagittal position of the maxilla ( p = 0.01 ). For mandibular angulation, there was a greater difference between values for Steiner and Ricketts techniques ( p = 0.001 ). In the upper incisor, the results for McNamara and Ricketts techniques were significantly different ( p = 0.004 ). Analysing the airway, subjects with a class II skeletal pattern had a smaller volume than those with a class III pattern ( p = 0.034 ). Conclusion. It may be concluded that skeletal class II patients have a significantly smaller airway volume than class III patients. The skeletal parameter does not always relate to the airway volume; however, the high mandibular angle could be related to the airway conditions.

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“…Finally, some researchers have described the malpositioning of both the maxilla and mandible in this condition (Drelich, 1948;Lau & Hägg, 1999;Al-Khateeb & Al-Khateeb, 2009). Likewise, inconsistent results have been reported regarding the relationship between Class II-1 malocclusion and upper-airway dimensions, where some investigators suggested Class II-1 malocclusion may have an influence on the upper-airway dimensions (Mergen & Jacobs, 1970;Silva et al, 2015;Soni et al, 2015) while other authors did not find a significant correlation between the two (Sosa, Graber & Muller, 1982;Ceylan & Oktay, 1995;Bollhalder et al, 2013). Further, a number of tooth-size studies have investigated Class II-1 malocclusion; their results were also contradictory, with some reporting significant differences in tooth-size ratios between Class II-1 malocclusion and Class I malocclusion or normal occlusion (Fattahi, Pakshir & Hedayati, 2006;Wędrychowska-Szulc, Janiszewska-Olszowska & Stepie n, 2010;Mollabashi et al, 2019) and others indicating no significant differences in this regard (Crosby & Alexander, 1989;Oktay & Ulukaya, 2010;Machado et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Craniofacial characteristics of Syrian adolescents with Class II division 1 malocclusion: a retrospective study

Ayoubi

Torre²,

Madléna

2020

PeerJ

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Background Malocclusion characteristics vary across different ethnic groups and populations. Limited data are available regarding the characteristics of Syrian adolescents with Class II division 1 (Class II-1) malocclusion, and the recent inflow of Syrian refugees and immigrants into Europe and many areas worldwide demonstrate the need for updated studies to discover the craniofacial characteristics of these new immigrants. Objectives The present compound cephalometric and tooth-size study sought to assess the dentofacial morphology, upper-airway dimensions, and tooth-size characteristics of Syrian adolescents with Class II-1 malocclusion and compare the results with established Syrian population norms. Materials and Methods The study sample consisted of 43 Syrian patients including 24 females and 19 males with Class II-1 malocclusion (age: 14.3 (±1.5) years, mean (±SD)). Cephalometric radiographs and orthodontic casts were analyzed using special orthodontic software (OnyxCeph3™) and a universal digital caliper, respectively. Statistics were calculated using the SPSS software. Results In Syrian adolescents with Class II-1 malocclusion, the position of the mandible relative to the nasion perpendicular (mean (95% confidence interval)) was −11.01 (−12.45, −9.57) mm. Facial axis angle showed a negative value: −6.25 (−7.65, −4.85) degrees. An obtuse nasolabial angle was observed: 104.05 (101.77, 106.33) degrees. The average width of the upper pharynx was 11.50 (10.53, 12.47) mm; however, there was no prevalence of an upper-pharyngeal width of 5 mm or less. The average value of the anterior tooth-size ratio was 80.69 (79.85, 81.53) percent. In total, 39.5% of the investigated subjects had anterior ratios outside two standard deviations from Bolton’s norm, while 25.6% of the investigated subjects had anterior ratios outside two standard deviations from Syrian population norm. Conclusions In this study, the inter-maxillary discrepancy of Class II-1 Syrian adolescents was a consequence of their hyperdivergent facial pattern. The observed small pharyngeal widths were not clinically significant, while the anterior tooth-size discrepancy might be clinically relevant.

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Assessment of upper airways measurements in patients with mandibular skeletal Class II malocclusion

Cited by 27 publications

References 21 publications

Interrelationships Between the Posterior Pharyngeal Space and the Dento-Maxillary Anomalies

Interrelationships Between the Posterior Pharyngeal Space and the Dento-Maxillary Anomalies

The Airway Volume Related to the Maxillo-Mandibular Position Using 3D Analysis

Craniofacial characteristics of Syrian adolescents with Class II division 1 malocclusion: a retrospective study

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