Tomographic Evaluation of the Upper Cervical Spine in Patients with Cleft lip and Palate and Class III Malocclusion.

OBJECTIVE: To perform a morphometric analysis of the upper cervical spine (UCS) by means of cone-beam computed tomography (CBCT) for the diagnosis of malformations or craniocervical instabilities in patients with cleft lip and palate (CLP) and class III malocclusion. MATERIALS AND METHODS: A total of 72 CBCTs from adult patients (48 male and 24 female) with Angle Class III malocclusion were divided into three groups: 1) Unilateral cleft lip and palate (UCLP) (n = 29; male = 65.5%; age = 24, 2 ± 4.2 years); 2) Bilateral cleft lip and palate (BCLP) (n = 18; male = 83.3%; age = 26.4 ± 6.0 years); 3) Control group (CON) (n = 25; male = 56.0%; age = 27.8 ± 9.3 years). The version 11.7 of the Dolphin® software (Chatsworth, California, USA) was used to evaluate the morphometric measurements and anomalies of the UCS. Data were analyzed by descriptive and inferential statistics (p ≤ 0.05). RESULTS: For the UCLP, BCLP and CON groups, respectively, the measures were: atlantodental interval (2.1 ± 0.5; 2.1 ± 0.4; 2.0 ± 0.3 mm), basion-opisthion (35.9 ± 3.2; 36.4 ± 3.0; 34.7 ± 1.9 mm), hyoid-C3 (34.5 ± 3.7; 34.5 ± 5.2; 35.3 ± 4.5 mm), and hyoid-sella (108.1 ± 9.8; 111.3 ± 9.2; 109.7 ± 10 mm); clivus-canal angle (152.3 ± 13; 150.3 ± 10; 150.7 ± 10°) and Torg-Pavlov index (1.0 ± 0.2; 1.0 ± 0.1; 1.1 ± 0.2). Potentially unstable anomalies and malformations were more prevalent in the UCLP group (34,4%). CONCLUSION: Subjects with UCLP presented compressive or unstable anomalies on upper cervical spine, more frequently than controls and BCLP, despite the lack of statistically significant differences among groups. Future studies could increase the safety of patients and healthcare professionals specialized in craniofacial anomalies.

Effects of 3D Airway Geometry on the Airflow of Adults with Cleft Lip and Palate and Obstructive Sleep Apnea: A Functional Imaging Study.

Objective Individuals with cleft lip and palate (CLP) are at a high risk of developing obstructive sleep apnea (OSA). Hypothetically, the severity of OSA might be associated with the morphology of the upper airway (UAW) and the characteristics of the airflow. Thus, the present study aimed to assess and compare, in adults with CLP and skeletal class-III discrepancy, with or without OSA, simulations of airflow resistance and pressure according to the geometrical characteristics of the UAW and cephalometric parameters. Materials and Methods According to the results of type-I polysomnography tests, the sample ( n = 21) was allocated in 2 groups: 1) without OSA (N-OSA; n = 6); and 2) with OSA (OSA; n = 15). Cephalometric measurements were performed on the cone-beam computed tomography (CBCT) scans of the groups. After three-dimensional (3D) reconstructions, the volume (V) and minimal cross-sectional area (mCSA) of the UAW were generated. Computational fluid dynamics (CFD) simulations were used to assess key airflow characteristics. The results were presented at a significance level of 5%. Results The UAW pressure values and airway resistance did not differ between the groups, but there was a tendency for more negative pressures (26%) and greater resistance (19%) in the OSA group. Volume and mCSA showed a moderate negative correlation with resistance and pressure. The more inferior the hyoid bone, the more negative the pressures generated on the pharyngeal walls. Conclusion The position of the hyoid bone and the geometry of the UAW (V and mCSA) exerted effects on the airway-airflow resistance and pressure. However, key airflow characteristics did not differ among subjects with CLP, were they affected or not by OSA.

Bite Force, Masticatory Performance, and Nutritional Status of Adult Individuals With Treacher Collins Syndrome.

OBJECTIVE: To characterize the stomatognathic system of individuals with Treacher Collins syndrome (TCS) by assessing bite force (BF) and masticatory performance (MP) and to evaluate the nutritional status (NS) of this population through anthropometric measurements. DESIGN: Cross-sectional study. SETTING: A public tertiary care hospital. PATIENTS: Forty-one individuals were divided into 2 groups: (1) Control (CON): 20 control adults with class I skeletal pattern and (2) TCS: 21 adults with TCS. INTERVENTIONS: BF measurement was assessed using a gnathodynamometer (IDDK Kratos). MP assessment was done using Image J-NIH software, by calculating the particles size of food submitted to standard chewing cycles ). NS was assessed based on body mass index (BMI). MAIN OUTCOME MEASURES: Based on the craniofacial dysmorphology, it is our hypothesis that this population present a dysfunctional masticatory system, which can negatively impact NS. RESULTS: Means BF values for the TCS were significantly reduced when compared with the CON group and corresponded to 170.9 ± 109.4N and 431.6 ± 134.1N (right molar [RM]) and 171.2 ± 93.9N and 427.4 ± 147.8N (left molar [LM]), respectively (P < .05). Although no significant differences were observed, the mean particle size of the TCS was greater when compared with the CON group and corresponded to 1.58 ± 1.93 mm2 and 0.66 ± 0.52 mm2, respectively. Although statistically similar mean values of BMIs were observed on both groups (CON = 23.4 ± 4.7/TCS = 23.4 ± 6.1), underweight and overweight individuals were found in 48% of the individuals with TCS and in 15% of the CON group participants. CONCLUSION: Individuals with TCS showed a significant BF reduction, but no differences were observed in MP and NS when compared with the control individuals.

Web survey during COVID-19 pandemic in São Paulo state: how are medical students sleeping and living?

Objectives: This study aimed at characterizing medical students' sleep and life quality during the COVID-19 pandemic in São Paulo (SP) state. Material and Methods: All public higher education institutions (HEIs) of SP state were invited to participate. From a list of 56 private HEIs, 16 were randomly selected. The web survey collected: sociodemographic data; factors related to COVID-19; sleep self-assessment; scores in the Epworth sleepiness scale, Pittsburgh sleep quality index, and student and resident life in the health area - questionnaire. Results: The HEIs' acceptance rate was 25% (8), resulting in 200 participants (response rate 5.04%), aged ≥18 years, 60.5% females. Concerning COVID-19, 89.00% never showed symptoms and/or tested positive, 82.00% declared full adherence to epidemiological measures to prevent the infection's spread, and 45.00% completed the vaccination schedule against SARS-CoV-2. Sleep deprivation was accompanied by a drop of self-perceived sleep quality from 8 to 6 (in a Likert scale) during COVID-19 pandemics (p≤0.0001), 76.50% were poor sleepers, and 40.00% had drowsiness, especially women (p≤0.05). They also had lower quality of life and unfavorable psychological and physical outcomes than men (p≤0.05). Internship students had a more negative perception of the educational environment (p≤0.05), characterized by an excessive workload. Discussion: Women and internship students are a representative fraction that requires special attention and focused strategies to cope with sleep problems and medical education during COVID-19 pandemics.

Assessment of Internal Nasal Dimensions of Individuals With Cleft Lip and Palate and Obstructive Sleep Apnea Syndrome by Computed Tomography.

To evaluate nasal cavity (NC) dimensions of individuals with cleft lip and/or palate (CL/P), obstructive sleep apnea (OSA), and primary snoring, by tomographic image analysis, compared to individuals with OSA without CL/P (N-CL/P).Cross-sectional and retrospective.Tertiary referral center.Patients were divided into 2 groups: (G1) CL/P + OSA or primary snoring, n = 11; (G2) N-CL/P + OSA, n = 13.NC tomographic images were reconstructed using ITK-SNAP software, and measurements were obtained from these three-dimensional models using SpaceClaim software.Total NC volumes, right and left NC volumes, and volumes of the nostril to the nasal valve (V1) and from the nasal valve to the superior limit of the nasopharynx (V2), cross-sectional areas, and perimeters.NC volumes (total, right, and left sides), V1, and V2, though smaller in the CL/P + OSA, did not differ significantly from the N-CL/P + OSA. Cross-sectional areas and perimeters of the superior limit of the nasopharynx, in the CL/P + OSA, presented significantly higher values compared to the N-CL/P + OSA (P ≤ .05).The internal nasal dimensions of patients with CL/P do not seem to be part of the etiopathogenesis, nor constitute a risk factor for OSA with greater severity, in this special group of patients.

Are reduced internal nasal dimensions a risk factor for obstructive sleep apnea syndrome? / Dimensões internas nasais reduzidas constituem fator de risco para síndrome da apneia obstrutiva do sono?

Abstract Introduction Obstructive sleep apnea syndrome is a high-prevalence disorder found in the population. Studies have shown a possible association between nasal obstruction and obstructive sleep apnea syndrome, but the existence of a association between the degree of nasal obstruction and obstructive sleep apnea syndrome severity has not yet been proven. Objective To evaluate the internal nasal dimensions of adults with primary snoring and obstructive sleep apnea syndrome by acoustic rhinometry and to correlate the findings with obstructive sleep apnea severity. Methods Twenty-one male Caucasian subjects with complaints of snoring and/or respiratory pauses during sleep, aged between 18 and 60 years of age, were evaluated. After clinical evaluation, otorhinolaryngological examination and flexible nasopharyngolaryngoscopy, all patients underwent type III polysomnography. The participants were divided into two groups according to symptom severity: group 1, primary snoring and/or mild obstructive sleep apnea syndrome(n = 9) and group 2, moderate/severe obstructive sleep apnea syndrome (n = 12). Internal nasal dimensions were measured by acoustic rhinometry, analyzing minimum cross sectional area (CSA) and three nasal segment volumes. Results The respiratory event index corresponded to 8.1 ± 4.0 in group 1 and 47.5 ± 19.1 in group 2. In group 1, the cross-sectional areas values, in cm2, corresponded to: CSA 1 = 1.1 ± 0.4; CSA 2 = 2.1 ± 0.9; CSA 3 = 3.5 ± 1.8 and, in group 2: CSA 1 = 1.2 ± 0.3, CSA 2 = 2.0 ± 0.5; CSA 3 = 2.8 ± 0.7. In group 1, volumes (V), in cm3, corresponded to: V1 = 3.5 ± 1.0; V2 = 9.3 ± 5.0; V3 = 40.2 ± 21.5 and in group 2 a: V1 = 3.6 ± 0.5; V2 = 7.6 ± 1.5; V3 = 31.5 ± 6.7. Cross-sectional area and volume ​​did not differ between groups. Conclusion There were no significant differences in the cross-sectional areas and nasal volumes between individuals with primary snoring-mild obstructive sleep apnea syndrome and moderate-severe obstructive sleep apnea syndrome. Differently to the raised hypothesis, our results suggest that there is no association between internal nasal dimensions and severity of obstructive sleep apnea syndrome.

Resumo Introdução A síndrome da apneia obstrutiva do sono é uma desordem de elevada prevalência na população. Estudos constataram possível associação entre obstrução nasal e síndrome da apneia obstrutiva do sono, porém a existência de uma relação entre a intensidade da obstrução nasal e a gravidade da síndrome da apneia obstrutiva do sono ainda não foi comprovada. Objetivo Avaliar as dimensões internas nasais de adultos com ronco primário e síndrome da apneia obstrutiva do sono por meio de rinometria acústica e correlacionar os achados com a gravidade da síndrome da apneia obstrutiva do sono. Método Foram avaliados 21 indivíduos com queixas de ronco e/ou pausas respiratórias durante o sono, gênero masculino, entre 18 e 60 anos, brancos. Após avaliação clínica, exame físico otorrinolaringológico e nasofaringolaringoscopia flexível, todos foram submetidos à polissonografia tipo III. Os participantes foram divididos em dois grupos de acordo com a gravidade dos sintomas: grupo 1, ronco primário e/ou síndrome da apneia obstrutiva do sono leve (n = 9) e grupo 2, síndrome da apneia obstrutiva do sono moderada/grave (n = 12). Dimensões internas nasais foram aferidas por rinometria acústica, foram consideradas para análise as áreas de secção transversa mínima e os volumes de três diferentes segmentos nasais. Resultados O índice de eventos respiratórios correspondeu a 8,1 ± 4,0 no grupo 1 e 47,5 ± 19,1 no grupo 2. No grupo 1, os valores de área de secção transversa, em cm2, corresponderam a: área de secção transversa 1 = 1,1 ± 0,4; área de secção transversa 2 = 2,1 ± 0,9; área de secção transversa 3 = 3,5 ± 1,8. No grupo 2: área de secção transversa 1 = 1,2 ± 0,3, área de secção transversa 2 = 2,0 ± 0,5; áre de secção transversa 3 = 2,8 ± 0,7. No grupo 1 os valores do volume, em cm3, corresponderam a: volume 1 = 3,5 ± 1,0; volume 2 = 9,3 ± 5,0; volume 3 = 40,2 ± 21,5 e no grupo 2 a: volume 1 = 3,6 ± 0,5; V2 = 7,6 ± 1,5; volume 3 = 31,5 ± 6,7. Os valores de área de secção transversa e volume não diferiram entre os grupos. Conclusão Não foram demonstradas diferenças significantes quanto às áreas seccionais transversas e os volumes nasais entre indivíduos com ronco primário e síndrome da apneia obstrutiva do sono leve e síndrome da apneia obstrutiva do sono moderada-grave. Contrariamente à hipótese levantada, os resultados sugerem não existir relação entre as dimensões internas nasais e o nível de gravidade da síndrome da apneia obstrutiva do sono.

Are reduced internal nasal dimensions a risk factor for obstructive sleep apnea syndrome?

INTRODUCTION: Obstructive sleep apnea syndrome is a high-prevalence disorder found in the population. Studies have shown a possible association between nasal obstruction and obstructive sleep apnea syndrome, but the existence of a association between the degree of nasal obstruction and obstructive sleep apnea syndrome severity has not yet been proven. OBJECTIVE: To evaluate the internal nasal dimensions of adults with primary snoring and obstructive sleep apnea syndrome by acoustic rhinometry and to correlate the findings with obstructive sleep apnea severity. METHODS: Twenty-one male Caucasian subjects with complaints of snoring and/or respiratory pauses during sleep, aged between 18 and 60 years of age, were evaluated. After clinical evaluation, otorhinolaryngological examination and flexible nasopharyngolaryngoscopy, all patients underwent type III polysomnography. The participants were divided into two groups according to symptom severity: group 1, primary snoring and/or mild obstructive sleep apnea syndrome(n = 9) and group 2, moderate/severe obstructive sleep apnea syndrome (n = 12). Internal nasal dimensions were measured by acoustic rhinometry, analyzing minimum cross sectional area (CSA) and three nasal segment volumes. RESULTS: The respiratory event index corresponded to 8.1 ±â€¯4.0 in group 1 and 47.5 ±â€¯19.1 in group 2. In group 1, the cross-sectional areas values, in cm2, corresponded to: CSA 1 = 1.1 ±â€¯0.4; CSA 2 = 2.1 ±â€¯0.9; CSA 3 = 3.5 ±â€¯1.8 and, in group 2: CSA 1 = 1.2 ±â€¯0.3, CSA 2 = 2.0 ±â€¯0.5; CSA 3 = 2.8 ±â€¯0.7. In group 1, volumes (V), in cm3, corresponded to: V1 = 3.5 ±â€¯1.0; V2 = 9.3 ±â€¯5.0; V3 = 40.2 ±â€¯21.5 and in group 2 a: V1 = 3.6 ±â€¯0.5; V2 = 7.6 ±â€¯1.5; V3 = 31.5 ±â€¯6.7. Cross-sectional area and volume ​​did not differ between groups. CONCLUSION: There were no significant differences in the cross-sectional areas and nasal volumes between individuals with primary snoring-mild obstructive sleep apnea syndrome and moderate-severe obstructive sleep apnea syndrome. Differently to the raised hypothesis, our results suggest that there is no association between internal nasal dimensions and severity of obstructive sleep apnea syndrome.

Respiratory sleep disorders, nasal obstruction and enuresis in children with non-syndromic Pierre Robin sequence.

INTRODUCTION: Obstructive sleep apnea is highly prevalent in non-syndromic Pierre Robin sequence patients. Studies have found a probable relationship between obstructive sleep apnea and nasal obstruction and between obstructive sleep apnea and enuresis. Assessment of the relationship between these variables in non-syndromic Pierre Robin sequence patients is scarce. OBJECTIVE: The present study aims to evaluate the relationship between symptoms of obstructive sleep apnea, nasal obstruction and enuresis, determining the prevalence of symptoms suggestive of these conditions, in schoolchildren with non-syndromic Pierre Robin sequence, and describe the prevalence of excessive daytime sleepiness habitual snoring and voiding dysfunction symptoms associated with enuresis. METHODS: This was a prospective analytical cross-sectional study developed at a reference center. Anthropometric measurements and a structured clinical interview were carried out in a sample of 48 patients. The instruments "sleep disorders scale in children" "nasal congestion index questionnaire" (CQ-5), and the "voiding dysfunction symptom score questionnaire" were used. Statistical analysis was performed for p < 0.05. RESULTS: Positive "sleep disorders scale in children" scores for obstructive sleep apnea and CQ-5 for nasal obstruction were observed in 38.78% and 16.33%, respectively. Enuresis was reported in 16.33% of children, being characterized as primary in 71.43% and polysymptomatic in 55.55%; according to the "voiding dysfunction symptom score questionnaire". There was a significant relationship between nasal obstruction and obstructive sleep apnea symptoms (p < 0.05), but no significance was found between obstructive sleep apnea symptoms and enuresis, and between nasal obstruction and enuresis. The prevalence of excessive daytime sleepiness was 12.24% and of habitual snoring, 48.98%. A family history of enuresis, younger age in years and a positive "voiding dysfunction symptom score questionnaire" score were associated with a higher prevalence of enuresis (p < 0.05). CONCLUSION: Children with non-syndromic Pierre Robin sequence are at high risk for obstructive sleep apnea symptoms and habitual snoring, with a correlation being observed between nasal obstruction and obstructive sleep apnea symptoms. In addition, the study showed that non-syndromic Pierre Robin sequence, obstructive sleep apnea and nasal obstruction symptoms were not risk factors for enuresis in these patients.

Respiratory sleep disorders, nasal obstruction and enuresis in children with non-syndromic Pierre Robin sequence / Desordens respiratórias do sono, obstrução nasal e enurese em crianças com sequência de Pierre Robin não sindrômica

Abstract Introduction Obstructive sleep apnea is highly prevalent in non-syndromic Pierre Robin sequence patients. Studies have found a probable relationship between obstructive sleep apnea and nasal obstruction and between obstructive sleep apnea and enuresis. Assessment of the relationship between these variables in non-syndromic Pierre Robin sequence patients is scarce. Objective The present study aims to evaluate the relationship between symptoms of obstructive sleep apnea, nasal obstruction and enuresis, determining the prevalence of symptoms suggestive of these conditions, in schoolchildren with non-syndromic Pierre Robin sequence, and describe the prevalence of excessive daytime sleepiness habitual snoring and voiding dysfunction symptoms associated with enuresis. Methods This was a prospective analytical cross-sectional study developed at a reference center. Anthropometric measurements and a structured clinical interview were carried out in a sample of 48 patients. The instruments "sleep disorders scale in children" "nasal congestion index questionnaire" (CQ-5), and the "voiding dysfunction symptom score questionnaire" were used. Statistical analysis was performed for p< 0.05. Results Positive "sleep disorders scale in children" scores for obstructive sleep apnea and CQ-5 for nasal obstruction were observed in 38.78% and 16.33%, respectively. Enuresis was reported in 16.33% of children, being characterized as primary in 71.43% and polysymptomatic in 55.55%; according to the "voiding dysfunction symptom score questionnaire". There was a significant relationship between nasal obstruction and obstructive sleep apnea symptoms (p< 0.05), but no significance was found between obstructive sleep apnea symptoms and enuresis, and between nasal obstruction and enuresis. The prevalence of excessive daytime sleepiness was 12.24% and of habitual snoring, 48.98%. A family history of enuresis, younger age in years and a positive "voiding dysfunction symptom score questionnaire" score were associated with a higher prevalence of enuresis (p< 0.05). Conclusion Children with non-syndromic Pierre Robin sequence are at high risk for obstructive sleep apnea symptoms and habitual snoring, with a correlation being observed between nasal obstruction and obstructive sleep apnea symptoms. In addition, the study showed that non-syndromic Pierre Robin sequence, obstructive sleep apnea and nasal obstruction symptoms were not risk factors for enuresis in these patients.

Resumo Introdução A apneia obstrutiva do sono apresenta elevada prevalência na população com sequência de Pierre Robin não sindrômica. Estudos constataram provável relação entre apneia obstrutiva do sono e obstrução nasal e entre apneia obstrutiva do sono e enurese, é escassa a avaliação da relação entre essas variáveis na sequência de Pierre Robin não sindrômica. Objetivo Avaliar a relação entre sintomas de apneia obstrutiva do sono, obstrução nasal e enurese, determinar a prevalência de sintomas sugestivos dessas condições, em crianças em idade escolar com sequência de Pierre Robin não sindrômica, assim como descrever a prevalência de sonolência excessiva diurna, ronco habitual e sintomas de disfunção miccional associados à enurese. Método Estudo prospectivo transversal analítico desenvolvido em centro de referência. Fez‐se aferição antropométrica e entrevista clínica estruturada em amostra de 48 pacientes. Os instrumentos usados foram: "escala de distúrbios do sono em crianças", questionário "índice de congestão nasal" (CQ‐5) e questionário "sistema de escore de disfunção miccional". A análise estatística foi feita para p < 0,05. Resultados Escores positivos da "escala de distúrbios do sono em crianças" para apneia obstrutiva do sono e do CQ‐5 para obstrução nasal foram observados em 38,78% e 16,33%; respectivamente. Enurese foi relatada em 16,33% das crianças e foi caracterizada como primária em 71,43% e polissintomática em 55,55%; conforme "sistema de escore de disfunção miccional". Observou‐se relação significante entre obstrução nasal e sintomas de apneia obstrutiva do sono (p < 0,05), porém não significante entre sintomas de apneia obstrutiva do sono e enurese, e obstrução nasal e enurese. A prevalência de sonolência excessiva diurna foi de 12,24% e de ronco habitual, de 48,98%. História familiar de enurese, menor idade em anos e escore positivo na "sistema de escore de disfunção miccional" foram associados a maior prevalência de enurese (p < 0,05). Conclusão Crianças com sequência de Pierre Robin não sindrômica estão sob alto risco para sintomas de apneia obstrutiva do sono e ronco habitual, foi observada correlação entre obstrução nasal e sintomas de apneia obstrutiva do sono. Demonstrou‐se, também, que sequência de Pierre Robin não sindrômica, sintomas de apneia obstrutiva do sono e obstrução nasal não constituíram fator de risco para enurese na população estudada.

Internal nasal dimensions of children with unilateral cleft lip and palate and maxillary atresia: comparison between acoustic rhinometry technique and cone-beam computed tomography. / Dimensões internas nasais de crianças com fissura labiopalatina e deficiência maxilar: comparação entre a técnica de rinometria acústica e a tomografia computadorizada de feixe cônico.

PURPOSE: To compare the nasal cavity geometry of children and teenagers with cleft lip and palate and maxillary atresia by two methods: cone-beam computed tomography, considered the gold standard, and acoustic rhinometry. METHODS: Data on cone-beam computed tomography and acoustic rhinometry examinations of 17 children and teenagers with cleft lip and palate and maxillary atresia, previously obtained for orthodontic planning purposes, were evaluated prospectively. Using Dolphin Imaging 11.8 software, the nasal cavity was reconstructed by two evaluators, and the internal nasal volumes were obtained. Using rhinometry, the volumes of regions V1 and V2 were measured. The values of each examination were then compared at a significance level of 5%. RESULTS: Statistical analysis showed high intra- and inter-rater reproducibility in the cone-beam computed tomography analysis. The mean internal nasal volumes (± standard deviation) obtained using acoustic rhinometry and cone-beam computed tomography corresponded to 6.6 ± 1.9 cm3 and 8.1 ± 1.5 cm3, respectively. The difference between the examinations was 17.7%, which was considered statistically significant (p = 0.006). CONCLUSION: The nasal volumes measured via the two methods were different; that is, they presented discrepancies in the measurements. The gold standard technique identified larger volumes than acoustic rhinometry in the nasal cavity. Therefore, determining which test reflects clinical reality is an essential future step.

OBJETIVO: Comparar a geometria da cavidade nasal de crianças e adolescentes com fissura labiopalatina e deficiência maxilar por meio de dois métodos: a tomografia computadorizada de feixe cônico, considerada padrão-ouro, e a rinometria acústica. MÉTODO: Foram avaliados, de maneira transversal, os exames de tomografia computadorizada de feixe cônico e de rinometria acústica, previamente obtidos para fins de planejamento ortodôntico, de 17 crianças e adolescentes com fissura labiopalatina e atresia maxilar. Por meio do programa Dolphin Imaging 11.8, a cavidade nasal das imagens tomográficas foi reconstruída por dois avaliadores e foram obtidos os volumes internos nasais. Por meio da rinometria, os volumes nasais foram aferidos para as regiões V1 e V2. Os valores de cada exame foram, então, comparados, a um nível de significância de 5%. RESULTADOS: A análise estatística mostrou alta reprodutibilidade intra e interavaliadores na análise da tomografia computadorizada de feixe cônico. Os volumes internos nasais médios (± desvio-padrão), utilizando a rinometria acústica e a tomografia computadorizada de feixe cônico corresponderam a 6,6 ± 1,9 cm3 e 8,1 ± 1,5 cm3, respectivamente. A diferença entre os exames foi de 17,7%, considerada estatisticamente significante (p = 0,006). CONCLUSÃO: Os volumes nasais aferidos pelos dois métodos são diferentes, ou seja, apresentam discrepâncias nas medidas. A técnica considerada padrão-ouro identificou volumes maiores na cavidade nasal. A determinação de qual exame reflete a realidade clínica constitui passo futuro importante.

The role of double-step advancement genioplasty and bilateral coronoidectomy in Nager Syndrome: A case report.

AIM: To report the surgical management of bilateral mandibular coronoid processes hyperplasia and mandibular retrognathism associated with trismus and convex facial profile in an individual diagnosed with Nager syndrome (NS). CASE REPORT: A 21 years old female was referred to the Department of Oral and Maxillofacial Surgery, presenting limited mouth opening and an unpleasant convex facial profile. The tomography exhibited hyperplasia of mandibular coronoid processes with no evidence of intracapsular ankylosis of the temporomandibular joint. The treatment objectives were to increase mouth opening through a bilateral coronoidectomy and gain chin projection using the double-step advancement genioplasty technique. The 9-month postoperative follow-up revealed a 22.22% (6 mm) gain in jaw opening, improved masticatory function, and facial profile. CONCLUSIONS: The NS is a complex craniofacial anomaly due to its clinical heterogeneity. Thus, treatment planning must be done individually, considering the patients' main complaints and respecting the limitations regarding anatomy and availability of proper surgical materials. In the present case, a bilateral coronoidectomy associated with immediate physiotherapy improved the patient's mouth opening, and the double-step genioplasty promoted a much more significant chin advancement than would be obtained with the single-step traditional osteotomy.

Bite force assessment before and after orthognathic surgery in individuals with repaired cleft lip and palate.

OBJECTIVE: To evaluate the impact of orthognathic surgery on the masticatory system of individuals with repaired cleft lip and palate (CLP) by means of bite force (BF) assessment. MATERIAL AND METHODS: Forty individuals were prospectively divided into 2 groups: 1) Control group (CON): 20 individuals without CLP (10 males, 10 females, 23.7y±7.4), 2) Cleft lip and palate group (CLP): 20 individuals with complete CLP with indication for orthognathic surgery (OS) (11 males, 9 females, 23.6y±5.6; 10 unilateral CLP; 10 bilateral CLP). The BF was evaluated in the immediate preoperative period (PRE), 3 months postoperatively (POST3M) and 6 months postoperatively (POST6M), using a gnathodynamometer (IDDK Kratos, Cotia-SP, Brazil). RESULTS: The BF of the CLP group was significantly lower than that of the CON in all evaluated periods. The BF of individuals with CLP was significantly lower in POST3M compared to PRE. Also, a significant increase in BF was observed between POST3M and POST6M. Though not significant, the BF was increased in POST6M when compared to PRE. The BF of unilateral and bilateral CLP individuals were statistically similar. Males presented a BF almost twice as high as females. CONCLUSION: Cleft lip and palate negatively impacts BF. Although there was a tendency for BF values to increase 6 months after OS, it was still significantly reduced when compared to controls, not reaching normative values.

Three-dimensional tomographic assessment of the upper airway using 2 different imaging software programs: A comparison study.

INTRODUCTION: Several imaging software programs with different tools are available for upper airway (UAW) analysis by means of cone beam computed tomography. Because of this wide variability, this study aimed to compare the reproducibility of two of the most used software programs on UAW segmentation, that is, Dolphin Imaging (Dolphin Imaging and Management Solutions, Chatsworth, Calif) and Mimics Research (Materialise, Leuven, Belgium). METHODS: The sample consisted of 50 scans of adult subjects with Class III malocclusion; pharyngeal volume and minimal cross-sectional area (mCSA) were assessed twice by 2 experienced evaluators using both software programs. Intra- and intersoftware and/or evaluator agreement were calculated using the intraclass correlation coefficient (ICC). Bland-Altman analysis was used to visualize the intersoftware and interevaluator agreement. RESULTS: Using Mimics Research and Dolphin Imaging, the respective mean values of volume (cm3) were 27.1 ± 8.4 and 24.7 ± 8.1 (P < 0.05) and of mCSA (mm2) were 167.8 ± 95.5 and 176.5 ± 102.3 (P < 0.05). Although differences between software packages were observed on both the analyzed variables, the results showed a high intersoftware agreement, with ICC of 0.87 (volume) and 0.97 (mCSA) and mean bias of 24.6 (volume) and -8.8 (mCSA). A high intrasoftware agreement was also observed, with values varying from 0.83 to 0.99. Excellent intra- and interevaluator agreement was also obtained, with ICC values from 0.93 to 0.99. CONCLUSIONS: Dolphin Imaging and Mimics Research individually provide highly reproducible results, with clinically acceptable agreement between them for UAW segmentation, providing consistent values for volume and mCSA.

Reduced pharyngeal dimensions and obstructive sleep apnea in adults with cleft lip/palate and Class III malocclusion.

Objective: To three-dimensionally evaluate the upper airway of individuals with cleft lip and palate (CLP) and Class III malocclusion and the occurrence of obstructive sleep apnea (OSA).Methods: Twenty-one CLP individuals with Class III malocclusion, 20-29 years of age, who underwent computed tomography for orthognathic surgery planning, were prospectively evaluated. All participants underwent polysomnography, and the apnea-hypopnea index ≥ 5 events/hour was considered indicative of OSA. The total upper airway and its subdivisions volumes, as well as the minimum pharyngeal cross-sectional area (CSA), were assessed using Mimics software.Results: Among the 21 individuals analyzed, 6 (29%) presented with OSA. The total upper airway and the oropharynx mean volumes were significantly decreased in subjects with OSA when compared to individuals without OSA. Mean CSA was not statistically different between groups.Conclusion: CLP individuals with Class III malocclusion and OSA have an upper airway significantly smaller than individuals without OSA.

Adults With Unilateral Cleft Lip and Palate Present Reduced Internal Nasal Volumes: Findings of a Three-Dimensional Morphometric Assessment in Cone-Beam Computed Tomography Scans.

ABSTRACT: The main purpose was to assess and compare nasal cavity (NC) volumes among adults with unilateral (UCLP) and bilateral cleft lip and palate (BCLP) and in noncleft controls (CON), by means of cone-beam computed tomography (CBCT) three-dimensional reconstructions. Forty-five scans of individuals with class III skeletal pattern, matched by age, were gathered in 3 groups: UCLP (n = 15), BCLP (n = 15) and (CON) (n = 15). The NC volume was assessed three-dimensionally, using Dolphin 11.8 software. Descriptive normally distributed data was presented as mean (±SD). Comparisons of NC volume among groups was performed using ANOVA test (P ≤ 0.05). The NC mean volumes corresponded to 14.7(±2.2) cm3 (UCLP), 17.1(±2.2) cm3 (BCLP) and 18.1(±3.8) cm3 (CON), respectively. UCLP individuals presented a significantly reduced NC volume when compared to controls (P = 0.006). No differences were observed between UCLP versus BCLP or BCLP versus CON. The intraclass correlation coefficient suggested a high intra- and inter-examiners agreement (>.075). Individuals with unilateral cleft lip and palate presented reduced NC when compared to individuals without cleft lip and palate. CBCT scans can be considered a highly accurate tool for morphometric assessments of craniofacial structures.

Dimensões internas nasais de crianças com fissura labiopalatina e deficiência maxilar: comparação entre a técnica de rinometria acústica e a tomografia computadorizada de feixe cônico / Internal nasal dimensions of children with unilateral cleft lip and palate and maxillary atresia: comparison between acoustic rhinometry technique and cone-beam computed tomography

RESUMO Objetivo Comparar a geometria da cavidade nasal de crianças e adolescentes com fissura labiopalatina e deficiência maxilar por meio de dois métodos: a tomografia computadorizada de feixe cônico, considerada padrão-ouro, e a rinometria acústica. Método Foram avaliados, de maneira transversal, os exames de tomografia computadorizada de feixe cônico e de rinometria acústica, previamente obtidos para fins de planejamento ortodôntico, de 17 crianças e adolescentes com fissura labiopalatina e atresia maxilar. Por meio do programa Dolphin Imaging 11.8, a cavidade nasal das imagens tomográficas foi reconstruída por dois avaliadores e foram obtidos os volumes internos nasais. Por meio da rinometria, os volumes nasais foram aferidos para as regiões V1 e V2. Os valores de cada exame foram, então, comparados, a um nível de significância de 5%. Resultados A análise estatística mostrou alta reprodutibilidade intra e interavaliadores na análise da tomografia computadorizada de feixe cônico. Os volumes internos nasais médios (± desvio-padrão), utilizando a rinometria acústica e a tomografia computadorizada de feixe cônico corresponderam a 6,6 ± 1,9 cm3 e 8,1 ± 1,5 cm3, respectivamente. A diferença entre os exames foi de 17,7%, considerada estatisticamente significante (p = 0,006). Conclusão Os volumes nasais aferidos pelos dois métodos são diferentes, ou seja, apresentam discrepâncias nas medidas. A técnica considerada padrão-ouro identificou volumes maiores na cavidade nasal. A determinação de qual exame reflete a realidade clínica constitui passo futuro importante.

ABSTRACT Purpose To compare the nasal cavity geometry of children and teenagers with cleft lip and palate and maxillary atresia by two methods: cone-beam computed tomography, considered the gold standard, and acoustic rhinometry. Methods Data on cone-beam computed tomography and acoustic rhinometry examinations of 17 children and teenagers with cleft lip and palate and maxillary atresia, previously obtained for orthodontic planning purposes, were evaluated prospectively. Using Dolphin Imaging 11.8 software, the nasal cavity was reconstructed by two evaluators, and the internal nasal volumes were obtained. Using rhinometry, the volumes of regions V1 and V2 were measured. The values of each examination were then compared at a significance level of 5%. Results Statistical analysis showed high intra- and inter-rater reproducibility in the cone-beam computed tomography analysis. The mean internal nasal volumes (± standard deviation) obtained using acoustic rhinometry and cone-beam computed tomography corresponded to 6.6 ± 1.9 cm3 and 8.1 ± 1.5 cm3, respectively. The difference between the examinations was 17.7%, which was considered statistically significant (p = 0.006). Conclusion The nasal volumes measured via the two methods were different; that is, they presented discrepancies in the measurements. The gold standard technique identified larger volumes than acoustic rhinometry in the nasal cavity. Therefore, determining which test reflects clinical reality is an essential future step.

Predictors of Velopharyngeal Dysfunction in Individuals With Cleft Palate Following Surgical Maxillary Advancement: Clinical and Tomographic Assessments.

OBJECTIVE: To investigate whether morphofunctional velopharyngeal aspects may be considered predictors of appearance or worsening of hypernasality in patients with cleft palate after surgical maxillary advancement (MA). DESIGN: Prospective. SETTING: National referral center for cleft lip and palate rehabilitation. PARTICIPANTS: Fifty-two patients with repaired cleft palate, skeletal class III malocclusion, and normal speech resonance completed speech audio recordings and cone-beam computed tomography examination before (T1) and, on average, 14 months after (T2) MA. INTERVENTIONS: Hypernasality was rated by 3 experienced speech-language pathologists using a 4-point scale and morphofunctional aspects on a 3-point scale. Cone-beam computed tomography image measurements were performed using Amira and Dolphin 3D software. For each velopharyngeal morphofunctional aspect analyzed, patients were compared according to the absence (G1) and presence (G2) of postoperative hypernasality. MAIN OUTCOME MEASURES: Comparison of hypernasality scores between T1 and T2 and association between hypernasality and each velopharyngeal morphofunctional aspect. RESULTS: Significant difference was observed between T1 and T2 for hypernasality ( P = .031) and between G1 and G2 ( P = .015) for velar mobility, with significant association between this variable and hypernasality on T2 (P = .041). CONCLUSIONS: Levator veli palatini mobility influenced the appearance of hypernasality after MA.

Symptoms of Obstructive Sleep Apnea, Nasal Obstruction, and Enuresis in Children With Nonsyndromic Cleft Lip and Palate: A Prevalence Study.

OBJECTIVE: To estimate the prevalence of symptoms of obstructive sleep apnea (OSA), nasal obstruction, and enuresis in children with nonsyndromic unilateral cleft lip and palate. DESIGN: Prospective cross-sectional study. SETTING: Referral care center. PARTICIPANTS: One hundred seventy-four children aged 6 to 12 years of both genders. INTERVENTIONS: Symptoms of OSA and nasal obstruction were investigated by analysis of scores obtained by the Sleep Disturbance Scale for Children (SDSC) and Congestion Quantifier (CQ-5). Enuresis was considered as present when urinary loss was reported during sleep (at least 1 episode/month, last 3 months). To characterize the enuresis as mono- or polysymptomatic, symptoms of dysfunction of the lower urinary tract (DLUT) were investigated by the Dysfunctional Voiding Scoring System (DVSS). Statistical analysis was performed at a 5% level of significance. RESULTS: Positive SDSC scores for OSA were observed in 60 (34%) children; positive CQ-5 scores for nasal obstruction in 45 (26%), positive DVSS scores for DLUT in 30 (17%), and enuresis was reported by 29 (17%), being categorized as primary in 66% and polysymptomatic in 72% of the children. Compared to the pediatric population, OSA, nasal obstruction, and enuresis prevalence ratios were up to 7 (95% confidence interval [CI] 5-9), 2 (95% CI 2-3), and 3 times (95% CI 2-5) higher, respectively. There was a positive/moderate correlation between symptoms of OSA and nasal obstruction ( P = .0001). No correlation was seen between symptoms of OSA and enuresis. CONCLUSIONS: Children with nonsyndromic cleft lip and palate have high prevalence of nasal obstruction and enuresis and are at risk of OSA.

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

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.