Non-surgical rapid maxillary expansion with mini-implants in adults: a narrative review / Expansión rápida maxilar no quirúrgica con miniimplantes en adultos: una revisión narrativa

Introduction: In recent years, rapid maxillary expansion (RME) in prepubertal growth stages has been deeply investigated; however, its study has recently been increasing in adults without need for surgery. The objective of this review is to present the results reported in the scientific literature about RME in adults. Material and Methods: Six databases were used to carry out the secondary search of the review. The search was performed virtually and studies from the last six years were considered, with a last search performed until November, 2022. Results: A total of 253 studies were found, from which 20 studies were finally selected. RME in adults can result in substantial expansion similar to that obtained in patients who have not yet completed the ossification of the mid-palatal suture. Conclusion: The reviewed scientific literature shows evidence that there are various devices supported by mini-implants as non-surgical treatment options to correct transverse deficiency and help expand the maxilla in adult patients.

Introducción: En los últimos años se ha investigado profundamente la expansión maxilar rápida (ERM) en etapas de crecimiento prepuberal; sin embargo, recientemente se ha ido incrementando su estudio en adultos sin necesidad de cirugía. El objetivo de esta revisión es presentar los resultados reportados en la literatura científica sobre ERM en adultos. Material y Métodos: Se utilizaron seis bases de datos para realizar la búsqueda secundaria de la revisión. La búsqueda se realizó de manera virtual y se consideraron estudios de los últimos seis años, con una última búsqueda realizada hasta noviembre de 2022. Resultados: Se encontraron un total de 253 estudios, de los cuales finalmente se seleccionaron 20 estudios. La ERM en adultos puede dar como resultado una expansión sustancial similar a la obtenida en pacientes que aún no han completado la osificación de la sutura palatina media. Conclusión: La literatura científica revisada muestra evidencia que existen diversos dispositivos apoyados en mini-implantes como opciones de tratamiento no quirúrgico para corregir la deficiencia transversal y ayudar a generar disyunción maxilar en pacientes adultos.

Association between temporomandibular disorder and condylar position in a university population / Asociación entre nivel de trastorno temporomandibular y posición condilar en una población universitaria

Aim: To determine the association between the level of temporomandibular disorder (TMD) and the condylar position in a university population. Material and Methods: A cross-sectional study was carried out in 41 university students between 18 and 27 years old (21±2.28). The level of TMD was determined using the Helkimo index modified by Maglione, whereas the condylar position was found radiographically by lateral scan. The association was evaluated using the Chi-square statistical test. Results: Statistically significant association was found between the TMD level and the condylar position in the female gender (p=0.003). The central condylar position was the most frequent in females (70.00%), while in males the highest frequency of condylar positions was posterior and anterior, 40.48% and 35.71% respectively. In mild TMD, the most frequent condylar position was central (46.34%), whilst non-centric positions were prevalent in moderate TMD, with 2.44%. There was no statistically significant association between the TMD level and the condylar position of the participants, nor in males (p>0.05). Conclusion: The TMD was associated with the condylar position in females of the university population studied, analyzed in lateral temporomandibular joint scans. Non-centric condylar positions were more frequent in the moderate TMD level and centric positions in mild TMD.

Objetivo: Determinar la asociación entre el nivel de trastorno temporomandibular (TTM) y la posición condilar en una población universitaria. Material y Métodos: Se realizó un estudio transversal en 41 individuos universitarios entre 18 y 27 años (21±2.28). Se determinó el nivel de TTM mediante el índice de Helkimo modificado por Maglione, mientras que la posición condilar fue hallada radiográficamente mediante escanografía lateral. La asociación fue evaluada mediante la prueba estadística Chi-cuadrado. Resultados: Se halló asociación estadísticamente significativa entre el nivel de TTM y la posición condilar en el género femenino (p=0.003). La posición condilar central fue la más frecuente en las mujeres con un 70.00% de aparición, mientras que en los hombres la mayor frecuencia de posiciones condilares fue posterior y anterior con 40.48% y 35.71% respectivamente. En el TTM leve la posición condilar más frecuente fue la central con un 46.34% de aparición, mientras que las posiciones no-céntricas lo fueron en el TTM moderado con un 2.44%. No hubo asociación estadísticamente significativa entre el nivel de TTM y la posición condilar en el total de participantes, ni tampoco en el género masculino (p>0.05). Conclusión: Se encontró asociación entre el nivel de TTM y la posición condilar en escanografías laterales de articulación temporomanibular en el género femenino de la población universitaria estudiada, mientras que no se encontró en el total de muestra, ni en el género masculino. Las posiciones condilares no-céntricas fueron más frecuentes en el nivel de TTM moderado y las céntricas en el TTM leve.

Prevalence of dental anxiety in patients attending the dental service of two hospitals managed by the Ministry of Health of Peru / Prevalencia de ansiedad dental en pacientes del servicio de odontología de dos hospitales del Ministerio de Salud del Perú

Objective: To determine the level of dental anxiety in dental patients from two hospitals managed by the Ministry of Health of Peru, between August-September 2015. Material and Methods: Cross-sectional, comparative, and observational study, carried out between August and September 2015, including a total of 660 adult patients from the Dental Service of the Hospitals Regional Docente de Trujillo and Belén de Trujillo, Peru. A questionnaire based on the Modified Dental Anxiety Scale (MDAS) (Cronbach's Alpha=0.77) was applied to the participating subjects. Student's t test for independent groups and the Mann-Whitney U test were used for the analysis of the results, considering a significance level of 5%. Results: The mean total anxiety score for the population was 12.05 (SD=3.76). Females (mean=12.56) presented greater anxiety than males (mean=11.53) (p<0.001), young adults (Me=12.60) presented greater anxiety than subjects in mid-adulthood (Me=11.10) (p<0.001). No difference was found in terms of hospitals (p=0.386); 96.06% of the patients evaluated presented dental anxiety, 4.09% had extreme anxiety. Conclusion: The mean dental anxiety of the studied population coincides with the level of moderate anxiety. Females and young adults presented greater anxiety. No difference was found with respect to hospitals. Likewise, 96.06% of the evaluated patients presented dental anxiety, 4.09% had extreme anxiety.

Objetivo: Determinar la ansiedad dental en pacientes odontológicos de dos hospitales del Ministerio de Salud del Perú, agosto-septiembre, 2015.Material y Métodos: El presente estudio de corte transversal, comparativo y observacional, se desarrolló entre agosto y septiembre del 2015 e incluyó un total de 660 pacientes adultos del Servicio de Odontología de los hospitales Regional Docente de Trujillo y Belén de Trujillo. Se les aplicó un cuestionario basado en la Escala de Ansiedad Dental Modificada (Alfa de Cronbach=0.77). Para el análisis de resultados se empleó la prueba t de Student para grupos independientes y la prueba U de Mann-Whitney, considerando un nivel de significancia del 5%. Resultados: La puntuación media total de ansiedad para la población fue de 12.05 (DE=3.76), el sexo femenino (Me=12.56) presentó mayor ansiedad que el masculino (Me=11.53) (p<0.001), la adultez joven (Me=12.60) presentó mayor ansiedad que la adultez media (Me=11.10) (p<0.001). No se encontró diferencia en cuanto a hospital (p=0.386). El 96.06% de los pacientes evaluados presentaron ansiedad dental, siendo el 4.09% de ansiedad extrema. Conclusión: La ansiedad dental media de la población estudiada coincide en el nivel de ansiedad moderada. El sexo femenino y los adultos jóvenes presentaron mayor ansiedad. No se encontró diferencia con respecto a los hospitales. Asimismo, el 96.06% de los pacientes evaluados presentaron ansiedad dental, siendo el 4.09% de ansiedad extrema.

Crowding of anterior teeth and bullying in schoolchildren / Apiñamiento de dientes anteriores y bullying en escolares

Objective: To compare the crowding of anterior teeth in schoolchildren with and without experience of bullying. Materials and Methods: A prospective, cross-sectional, comparative and observational study was conducted in two educational institutions, one public and one private; The sample consisted of 218 schoolchildren between 11 and 16 years of age. Dental crowding was evaluated in the upper and lower anterior sector using Little's irregularity index. To diagnose bullying, a previously validated questionnaire was applied, with dichotomized questions. The comparison between crowding in patients with and without experience of bullying was evaluated with the U-Mann Whitney statistical test. Results:Statistically significant differences in the amount of crowding (p<0.05) were found. The average crowding for the group subjected to bullying was 11.6 +/- 9.4 mm and in the group without bullying was 9.1+/- 7.9 mm. Conclusion: There was a higher amount of dental crowding in schoolchildren subjected to bullying compared to schoolchildren with no bullying.

Objetivo: Comparar el apiñamiento de dientes anteriores en escolares con y sin experiencia de acoso escolar (bullying). Material y Métodos: Se realizó un estudio prospectivo, transversal, comparativo y observacional en dos instituciones educativas, una pública y otra privada; La muestra estuvo conformada por en 218 escolares entre 11 y 16 años de edad. El apiñamiento dental se evaluó en el sector anterior superior e inferior utilizando el índice de irregularidad de Little. Para diagnosticar acoso escolar, se aplicó un cuestionario validado previamente, con preguntas dicotomizadas. La comparación entre el apiñamiento en pacientes con y sin experiencia de acoso escolar se evaluó con la prueba estadística U-Mann Whitney. Resultados: Se encontraron diferencias estadísticamente significativas la cantidad de apiñamiento (p<0.05). El apiñamiento promedio para el grupo sometido a acoso escolar fue de 11.6 +/- 9.4 mm y en el grupo sin acoso escolar fue de 9.1 +/- 7.9 mm. Conclusion: Hubo un mayor grado de apiñamiento dental en los escolares sometidos al acoso escolar en comparación con los escolares sin acoso escolar.

Prediction of the mesiodistal width of maxillary anterior teeth from nasal interalar width in peruvian subjects with facial harmony

Objective: To determine regression models to predict the mesiodistal widths of the maxillary anterior teeth from interalar width of the nose in subjects with facial harmony. Materials and Methods: A cross-sectional study was carried out in a sample of 75 subjects with facial harmony and ages ranging from 18 to 30 years (21.28±3.75 years). The mesiodistal width of the central (CI), lateral (LI) incisors, and canines (C), as well as the interalar width (IW) of each subject were measured using a digital vernier caliper. Simple linear regression analyses were used to predict the width of the maxillary anterior teeth from the nasal interalar width, from which formulas for predicting the dimensions of each anterior tooth were obtained. Results: A statistically significant relationship was found between the nasal interalar width and the mesiodistal widths of the upper central incisor (p=0.019, R2=5.23%), upper lateral incisor (p=0.019, R2=2.31%), and upper canine (p=0.016, R2=12.04%) that allowed to develop simple linear prediction models for each tooth represented by the following formulas: CI=7.04+0.04(IW); LI=6.01+0.03 (IW); C=6.19+0.05 (IW). Conclusion: The nasal interalar width is a good predictor of the mesiodistal widths of the maxillary anterior teeth.

Objectivo: Determinar modelos de regresión para predecir los anchos mesiodistales de los dientes anterosuperiores a partir del ancho interalar de la nariz en individuos con armonía facial. Materiales and Métodos: Se realizó un estudio transversal con una muestra de 75 sujetos con armonía facial entre 18 a 30 años (21.28 ± 3.75 años), se midió el ancho mesiodistal de incisivos centrales (IC), laterales (IL) y caninos (C) así como el ancho interalar (AI) de cada sujeto empleando un calibrador vernier digital. Para la predicción del ancho de los dientes anterosuperiores a partir del ancho interalar nasal se emplearon análisis de regresión lineal simple, a partir de los cuales se obtuvieron fórmulas de predicción de las dimensiones de cada pieza dentaria anterior. Resultados: Se encontró relación estadísticamente significativa entre el ancho interalar nasal y los anchos mesiodistales del incisivo central superior (p=0.019, R2 5.23%), incisivo lateral superior (=0.019, R2=2.31%) y canino superior (p=0.016, R2=12.04%) que permitieron generar modelos de predicción lineal simple para cada pieza dentaria representados mediante las siguientes fórmulas: IC=7.04+0.04(AI); IL=6.01+0.03(AI); C=6.19+0.05(AI). Conclusión:El ancho interalar nasal es un buen predictor de los anchos mesiodistales de los dientes anterosuperiores.

Relationship between the inner intercanthal distance and the mesiodistal dimension of maxillary anterior teeth in a peruvian population with facial harmony / Relación entre la distancia intercantal interna y la dimensión mesiodistal de dientes anterosuperiores en una población peruana con armonía facial

Objective: To determine the relationship between the inner intercanthal distance and the mesiodistal dimension of the maxillary anterior teeth in a Peruvian population with facial harmony. Material and Methods: A cross-sectional study on a sample of 75 Peruvian subjects with facial harmony, with ages ranging between 18 and 30 years, was conducted. The inner intercanthal distance and the mesiodistal dimension of maxillary anterior teeth of each subject were measured with a digital vernier caliper. The relationship was evaluated by simple linear regression analysis. Results: A statistically significant direct relationship was found between the dimension of the inner intercanthal distance with the mesiodistal width of the lateral incisors (p=0.040, R2=5.65%), canines (p=0.032, R2=6.17%), and the total mesiodistal sum of the six anterior teeth (p=0.040, R2=5.63%), but not with the central incisors (p=0.273, R2=1.64%). Conclusion: The inner intercanthal distance showed a direct relationship with the total mesiodistal linear dimension of the maxillary anterior teeth, with the mesiodistal dimensions of the lateral incisors and canines in a Peruvian population with facial harmony.

Determinar la relación entre la distancia intercantal interna y la dimensión mesiodistal de los dientes anterosuperiores en individuos peruanos con armonía facial. Material y métodos: Se realizó un estudio transversal en una muestra de 75 individuos peruanos con armonía facial entre 18 a 30 años. Se midió la distancia intercantal interna y la dimensión mesiodistal de dientes anterosuperiores de cada sujeto con un calibrador vernier digital. La relación fue evaluada mediante análisis de regresión lineal simple. Resultados: Se encontró relación directa estadísticamente significativa entre la dimensión de la distancia intercantal interna con el ancho mesiodistal de los incisivos laterales (p=0.040, R2=5.65%), caninos (p=0.032, R2=6.17%) y la suma total mesiodistal de los seis dientes anteriores (p=0.040, R2=5.63%), más no con los incisivos centrales (p=0.273, R2=1.64%). Conclusión: La distancia intercantal interna mostró relación directa con la dimensión lineal mesiodistal total de los dientes anterosuperiores, con las dimensiones mesiodistales de los incisivos laterales y de caninos en individuos peruanos con armonía facial.

Glabellar vertical line as a reference goal for anteroposterior maxillary position

ABSTRACT Objective: The aim of this study was to evaluate the use of glabellar vertical line (GVL) as the anteroposterior maxillary position goal. Methods: A cross-sectional study was conducted assessing 129 participants (20.21 ± 1.99 years): 67 women (20.16 ± 1.99 years), and 62 males (20.26 ± 2.06 years). The facial profile photographs were taken with a posed smile in natural head position. The linear distance from the most facial convexity of the upper central incisor (FA) to the goal anterior-limit line (GALL) and also from FA to GVL were measured and compared. Wilcoxon signed-ranks test was applied. To determine the correlation between the distances, Spearman's correlation coefficient was used. Simple and multiple linear regression were also performed. Results: The GALL-GVL separation was 0.54 ± 1.14 mm (95%CI: 0.34-0.74). A strong correlation between FA-GALL and FA-GVL distances (Spearman's rho=0.983 [95%CI: 0.976-0.988], p< 0.01) was identified. The FA-GVL distance explains almost all the total variation of FA-GALL (R2=95.84%, p< 0.01). The FA-GALL distance can be predicted by using the formula: FA-GALL=0.5+0.9*(FA-GVL). Conclusion: These findings suggest that GVL could be used as an easier-to-use treatment goal to determine the maxillary anteroposterior position, compared to GALL, to improve facial harmony profile goals in cases where the maxillary incisors are properly positioned anteroposteriorly.

RESUMO Objetivo: o objetivo desse estudo foi avaliar o uso da linha vertical glabelar (GVL) como referência para a posição anteroposterior da maxila. Métodos: esse estudo transversal avaliou 129 pacientes (20,21 ± 1,99 anos), sendo 67 mulheres (20,16 ± 1,99 anos) e 62 homens (20,26 ± 2,06 anos). As fotografias de perfil foram realizadas com os pacientes em sorriso posado e em posição natural de cabeça. As distâncias lineares entre a porção mais convexa da face vestibular do incisivo central superior (FA) e a linha do limite anterior (GALL), e entre a FA e a GVL foram mensuradas e comparadas. Para a análise comparativa, utilizou-se o teste de postos sinalizados de Wilcoxon. O coeficiente de correlação de Spearman avaliou a correlação. Além disso, foi realizada regressão linear múltipla. Resultados: a distância entre GALL e GVL foi de 0,54 ± 1,14mm (95% IC: 0,34-0,74). Uma forte correlação foi identificada entre as distâncias FA-GALL e FA-GVL (Spearman's rho = 0,983 (95%IC: 0,976-0,988), p< 0,01). A distância FA-GVL contempla quase todas as variações de FA-GALL (R2 = 95,84%, p< 0,01). Essa distância pode ser calculada através da fórmula: FA-GALL= 0,5 + 0,9*(FA-GVL). Conclusão: os resultados encontrados sugerem que a GVL pode ser adotada como uma referência de fácil utilização na determinação da posição anteroposterior da maxila, quando comparada à GALL para a melhora do perfil facial nos casos em que os incisivos superiores estão corretamente posicionados.

Impact of the need for orthodontic treatment on academic performance, self-esteem and bullying in schoolchildren / Impacto de la necesidad de tratamiento ortodóntico en el rendimiento académico, autoestima y bullying en escolares

Objective: The aim of this study was to evaluate the impact of the need for orthodontic treatment on academic performance, self-esteem and bullying in schoolchildren. Material and methods: This cross-sectional study included a total of 147 school children between 12 and 18 years of age. Academic performance was measured taking into account the final average grades for all the courses; for self-esteem and bullying, scores obtained with validated questionnaires were used. The Dental Aesthetic Index was used to determine the need for orthodontic treatment. The Kruskal Wallis test was used for the comparisons between the scores for academic performance, self-esteem and bullying according to each category of need for orthodontic treatment; a level of significance of 5% was considered.Results: The results showed mean academic performance scores of 13.6, 12.5, 12.9, 13.2 for those who did not need orthodontic treatment, those with defined malocclusion, severe malocclusion and very severe malocclusion, respectively; for self-esteem the scores were 21.6, 20.9, 21.0 and 20.5; and for bullying, 14.2, 15.4, 14.5 and 13.0. No statistically significant differences were found between the scores in the different groups evaluated (p>0.05). Conclusion: The need for orthodontic treatment in schoolchildren showed no impact on academic performance, self-esteem and bullying. The need for orthodontic treatment, as measured by the Dental Aesthetic Index, did not prove to be a determining factor in the presence of such variables in schoolchildren.

Objetivo: El presente estudio tuvo como objetivo evaluar el impacto de la necesidad de tratamiento ortodóntico en el rendimiento académico, autoestima y bullying en escolares. Material y métodos: El estudio transversal, incluyó un total de 147 escolares de 12 y 18 años de edad. El rendimiento académico fue medido mediante los promedios finales de todos los cursos de estudio, para la autoestima y el bullying se emplearon puntuaciones obtenidas con cuestionarios validados, y para determinar la necesidad de tratamiento ortodóntico se utilizó el Índice de Estética Dental. Las comparaciones entre las puntuaciones del rendimiento académico, autoestima y bullying según cada categoría de necesidad de tratamiento ortodóntico se empleó la prueba Kruskal Wallis, considerando un nivel de significancia del 5%. Resultados: Los resultados mostraron puntuaciones promedio de rendimiento académico de 13.6, 12.5, 12.9, 13.2 para quienes que no necesitaron de tratamiento ortodontico, con maloclusión definida, maloclusión severa y maloclusión muy grave respectivamente; para la autoestima las puntuaciones fueron de 21.6, 20.9, 21.0 y 20.5; mientras que, para el bullying de 14.2, 15.4, 14.5 y 13.0. No se encontraron diferencias estadísticamente significativas entre las puntuaciones en los diversos grupos evaluados (p>0.05).Conclusión: La necesidad de tratamiento ortodóntico en escolares no evidenció impacto en el rendimiento académico, autoestima y bullying. La necesidad de tratamiento de ortodoncia, medida mediante el Índice de Estética Dental, no mostró ser un factor determinante de la presencia de dichas variables en escolares.

Dental arch width in overweight and normal-weight subjects / Comparación de los anchos de los arcos dentarios en sujetos con y sin sobrepeso

Objective: To compare the width of the dental arches between overweight and non-overweight subjects . Materials and Methods: A cross-sectional comparative study was carried out with 54 subjects from 8 to 13 years of age, 27 normal-weight and 27 overweight. The presence of overweight was assessed according to the Quetelet index. To determine the width of the dental arches, measurements of the upper and lower intercanine and intermolar width were obtained with a digital calibrated Vernier caliper. The comparison between the dental arch width of normal-weight and overweight subjects was performed using the Mann-Whitney U test. Results: Statistically significant differences were found in the intercanine and intermolar widths between overweight and non-overweight subjects (p<0.05). Conclusion: The dental arches were wider in overweight subjects compared to those of normal-weight.

Comparar los anchos de los arcos dentarios en sujetos con sobrepeso y sin sobrepeso. Materiales y Método: Se realizó un estudio transversal comparativo. Se evaluaron 54 sujetos de 8 a 13 años de edad, 27 sin sobrepeso y 27 con sobrepeso. La presencia de sobrepeso se evaluó según el índice de Quetelet. Para determinar los anchos de los arcos dentarios, se analizaron, en los modelos de estudio de cada grupo, las medidas de los anchos intercanino e intermolar superior e inferior con un vernier calibrado digital. La comparación de los anchos de los arcos dentarios de los sujetos con sobrepeso y sin sobrepeso se realizó mediante la prueba U de Mann-Whitney. Resultados: Se encontraron diferencias estadísticamente significativas en los anchos intercanino e intermolar entre los sujetos con sobrepeso y sin sobrepeso (p<0.05). Conclusión: Los anchos de los arcos dentarios fueron mayores en sujetos con sobrepeso que en sujetos sin sobrepeso.

Bullying in schoolchildren according to Angle's classifications of malocclusion

Objective: to compare bullying in schoolchildren according diffe-rent types of Angle's malocclusion. materials and methods: a cross-sectional and prospective study was performed. 217 schoolchildren were evaluated. a scale-adapted validated questionnaire was applied to measure general bullying. malocclusion was classified according to Angle's classification. comparison in bullying between different types of malocclusions was performed by Kruskal Wallis non-parametric test. multiple linear regression analysis was also performed. results: no statistically significant differences in bullying between the different types of Angle's malocclusion was found (p=0.295). multiple linear regression applied to bullying scores treated as dependent variable with malocclusion, sex, and age showed no influence of these variables on bullying (R2=0.0027, p>0.05). conclusion: bullying in schoolchildren does not differ according Angle's classification of malocclusion. further studies are necessary to emphasize the assessment of bullying related to malocclusion of anterior teeth.

Snoring in individuals with and without maxillary constriction

Objective: compare snoring in individuals with and without maxillary constriction. methods: 124 individuals (mean age, 40.53; SD, 15.59), 81 women and 43 men were evaluated. two groups were formed, 62 individuals with and 62 without maxillary constriction. to assess the snoring, a visual analog scale of snoring severity was used. comparison of snoring scores between groups was performed by the U Mann-Whitney test. simple and multiple linear regressions were also performed. results: the mean snoring scores of the group with maxillary constriction was 3.00+/-2.96, while in the group without maxillary constriction it was 3.87+/-2.90. no statistically significant differences between snoring scores in individuals with and without maxillary constriction was found (p=0.105). the variability of snoring scores was not explained by the presence of maxillary constriction (p=0.100, R2=2.20 percent). conclusion: there was no different between the snoring scores in individuals with and without maxillary constriction. maxillary constriction alone does not influence snoring.

Correlation between self-perception of need for orthodontic treatment in pregnant women and the perception of oral health professionals

Objective: to determine the correlation between the self-perception of need for orthodontic treatment in pregnant women and the perception of oral health professionals. material and methods: a cross-sectional study was conducted with a sample of 30 pregnant women, whose self-perception of the need for orthodontic treatment was assessed through the aesthetic component of the Index of orthodontic treatment need (IOTN). a panel of oral health professionals (OHP) composed by a dental surgeon and an orthodontist also evaluated the aesthetic perception for each pregnant woman, independently, using the same method. the correlation between the IOTN scores was evaluated using the Spearman's rank correlation coefficient and the resulting correlations were compared by the Eid-Gollwitzer-Schnmidt significance of correlations test. results: a moderate-positive, statistically significant correlation was found between the IOTN of the pregnant women and those of the dental surgeon (0.507, p=0.004) and of the orthodontist (0.451, p=0.013). between the dental surgeon and the orthodontist, the correlation was very high-positive and statistically significant (0.957, p<0.001). the OHP panel reported greater correlation than those involving the pregnant women (p<0.001). conclusion: the perception of pregnant women of the need for orthodontic treatment increased moderately similar to the perception of the OHP. the pregnant women showed less consistency in their perception than the OHP, demonstrating low awareness of need for orthodontic treatment by pregnant women.

Antibacterial effect of four endodontic cements against enterococcus faecalis ATCC 29212: an in vitro study

Objective: to compare the in vitro antibacterial effect of the root canal cements Endobalsam, Top Seal, Apexit and Endofill against enterococcus faecalis ATCC 29212. Materials and method: Eighty-five applications of cements on enterococcus faecalis, cultured in vitro on solid media in Petri dishes, were analyzed. five groups were evaluated: four for each cement, and the fifth for the positive control (amoxicillin). the antibacterial effect was measured by the diameters of the bacterial inhibition halos at 24 hours, 48 hours, and seven days. student´s t-test, ANOVA and the Tukey test were used for the statistical analysis. results: no statistically significant differences were found at 24 hours (p>0.05); at 48 hours and seven days, Endofill and Apexit had the greatest effect (p<0.05); finally, on day 7 only Endofill showed an effect similar to the positive control (p>0.05). conclusion: enterococcus faecalis ATCC 29212 was susceptible to all cements. Endofill had greater in vitro antibacterial effect than Apexit, Top Seal and Endobalsam.

Distances between mandibular posterior teeth and the WALA ridge in Peruvians with normal occlusion

ABSTRACT Objective: The purposes of this investigation were to determine the horizontal distances between the mandibular posterior teeth and the WALA ridge in a sample of Peruvians with normal occlusion and to compare them by tooth type, sex, arch side, and age groups. Methods: 65 dental casts of subjects with normal occlusion were collected. Posterior teeth, except for third molars, were evaluated. The horizontal distances between the occluso-gingival midpoints of the buccal surfaces (FA points) of each tooth and the WALA ridge were measured using a modified digital caliper. The values between each different tooth type within the sample were compared using the ANOVA and Scheffe tests, while comparisons by sex, arch side and age groups, using the Student's t-test. Results: The mean distances in the sample was 0.96 mm for first premolars, 1.45 mm for second premolars, 2.12 mm for first molars and 2.55 mm for second molars. Statistically significant differences between each of the four tooth types were found. There were no significant differences found between sex, arch side and age groups. Conclusion: The horizontal distances between the mandibular posterior teeth and the WALA ridge increased progressively from the first premolars to the second molars in Peruvians with normal occlusion. The WALA ridge was a good landmark to evaluate the positions of posterior teeth in Peruvians with normal occlusion.

RESUMO Objetivos: o objetivo dessa investigação foi determinar a distância horizontal entre os dentes posteroinferiores e a borda WALA, em uma amostra de peruanos com oclusão normal, e compará-la por tipo de dente, sexo, lado da arcada dentária e grupo etário. Métodos: foram selecionados 65 modelos dentários de indivíduos com oclusão normal, nos quais foram avaliados os dentes posteriores, com exceção dos terceiros molares. As distâncias horizontais entre o ponto oclusogengival médio da face vestibular (pontos EV) de cada dente e a borda WALA foram medidas utilizando-se um compasso digital modificado. Os testes de Scheffe e ANOVA foram usados para comparações entre os valores de cada tipo de dente estudado, enquanto o teste t de Student foi usado para as comparações entre sexos, lados da arcada e faixa etárias. Resultados: as distâncias médias nessa amostra foram de 0,96 mm para os primeiros pré-molares; 1,45 mm para os segundos pré-molares; 2,12 mm para os primeiros molares, e 2,55 mm para os segundos molares. Foram encontradas diferenças estatisticamente significativas entre cada um dos quatro tipos dentários. Não houve diferenças significativas entre os sexos, lados da arcada e grupos etários. Conclusão: nos peruanos com oclusão normal dessa amostra, as distâncias horizontais entre os dentes posteroinferiores e a borda WALA aumentaram progressivamente dos primeiros pré-molares para os segundos molares. Nesses pacientes, a borda WALA funcionou como um bom ponto de referência para se avaliar a posição dos dentes posteroinferiores.

Comparison of airway dimensions in skeletal Class I malocclusion subjects with different vertical facial patterns

ABSTRACT Objective: The aim of this study was to compare upper airway widths among skeletal Class I malocclusion subjects with different vertical facial patterns. Methods: The sample included a total of 99 lateral cephalograms of post pubertal individuals (18.19 ± 1.76 years old). The vertical facial pattern was determined by the Vert index. The McNamara method was used to quantify upper airway widths. ANOVA test and Student's t test for independent groups were used, when normal distribution was not supported Kruskal-Wallis test and U-Mann-Whitney test were used. A multiple linear regression analysis was also performed. Results: Statistically significant differences in several nasopharyngeal widths were found among the distinct vertical facial patterns. Subjects with brachyfacial pattern presented larger nasopharyngeal widths than subjects with mesofacial (p= 0.030) or dolichofacial (p= 0.034) patterns. The larger the Vert value, the larger the nasopharyngeal widths (R2= 26.2%, p< 0.001). At the level of oropharynx no statistically significant differences were found. Conclusion: It was concluded that nasopharyngeal linear anteroposterior widths in Class I malocclusion brachyfacial are larger than in mesofacial and dolichofacial individuals. The Vert index only explained 25% of the total variability. No correlation was found for the oropharyngeal widths.

RESUMO Objetivo: o objetivo desse estudo foi comparar as dimensões das vias aéreas superiores em indivíduos portadores de má oclusão de Classe I esquelética com diferentes padrões faciais verticais. Métodos: a amostra consistiu de 99 cefalogramas laterais de indivíduos na pós-puberdade (18,19 ± 1,76 anos). O padrão facial vertical foi determinado por meio do índice VERT. O método de McNamara foi utilizado para quantificar as dimensões das vias aéreas superiores. O teste ANOVA e o teste t de Student para grupos independentes foram utilizados e, quando a distribuição normal não era possível, o teste de Kruskal-Wallis e o teste U de Mann-Whitney foram aplicados. Foi também realizada uma análise de regressão linear múltipla. Resultados: diferenças estatisticamente significativas nas dimensões da nasofaringe foram encontradas entre os diferentes padrões faciais verticais. Os indivíduos com padrão braquifacial apresentaram dimensões nasofaríngeas maiores do que os indivíduos com padrão mesofacial (p= 0,030) ou dolicofacial (p= 0,034). Quanto maior o valor do VERT, maior a dimensão nasofaríngea (R2 = 26,2%, p< 0,001). Não foram encontradas, entretanto, diferenças estatisticamente significativas ao nível da orofaringe. Conclusão: pode-se concluir que as dimensões anteroposteriores lineares da nasofaringe nos indivíduos braquifaciais com má oclusão de Classe I são maiores do que nos indivíduos mesofaciais e dolicofaciais. O índice VERT foi capaz de explicar apenas 25% da variabilidade total. Não foi encontrada correlação para as dimensões da orofaringe.

Assessment of general bullying and bullying due to appearance of teeth in a sample of 11-16 year-old Peruvian schoolchildren

OBJECTIVE: to assess the incidence of general bullying and bullying due to the appearance of teeth in a sample of 11-16 year-old peruvian schoolchildren. MATERIALS AND METHODS: cross-sectional study with a sample of 218 students aged 11 to 16 years old (13.41±1.44), 109 males, and 153 from a public school. a survey on general bullying and the appearance of teeth was applied using a validated questionnaire. RESULTS: the frequency of general bullying was 32.57 precent, and bullying due to dental appearance was 18.81 percent. general bullying (p=0.005) and dental appearance (p=0.024) were more frequent in the public school, but there were no statistically significant differences according to sex. the highest frequency of general bullying was related to name-calling, which accounted for 47.71 percent. victimization by appearance of teeth in one or two occasions in the last two months accounted for 12.39 percent, according to participating subjects. CONCLUSION: general and tooth-related bullying was more frequent among students in public schools, with no significant differences according to sex.

Relationship between dental calcification and skeletal maturation in a Peruvian sample

ABSTRACT Objective: the objective of the study was to determine the relationship between dental calcification stages and skeletal maturation in a Peruvian sample. Methods: panoramic, cephalometric and carpal radiographs of 78 patients (34 girls and 44 boys) between 7 and 17 years old (9.90 ± 2.5 years) were evaluated. Stages of tooth calcification of the mandibular canine, first premolar, second premolar, and second molar and the skeletal maturation with a hand-wrist and a cervical vertebrae method were assessed. The relationships between the stages were assessed using Spearman's correlation coefficient. Additionally, the associations of mandibular and pubertal growth peak stages with tooth calcification were evaluated by Fisher's exact test. Results: all teeth showed positive and statistically significant correlations, the highest correlation was between the mandibular second molar calcification stages with hand-wrist maturation stages (r = 0.758, p < 0.001) and with vertebrae cervical maturation stages (r = 0.605, p < 0.001). The pubertal growth spurt was found in the G stage of calcification of the second mandibular molar, and the mandibular growth peak was found in the F stage of calcification of the second molar. Conclusion: there was a positive relationship between dental calcification stages and skeletal maturation stages by hand-wrist and cervical vertebrae methods in the sample studied. Dental calcification stages of the second mandibular molar showed the highest positive correlation with the hand-wrist and cervical vertebrae stages.

RESUMO Objetivo: o objetivo do presente estudo foi determinar a correlação entre o estágio de calcificação dentária e a maturação esquelética, em uma amostra de indivíduos peruanos. Métodos: radiografias panorâmicas, cefalométricas e carpais de 78 pacientes (34 meninas e 44 meninos) com idades entre 7 e 17 anos (média = 9,90 ± 2,5 anos) foram avaliadas. Nelas, avaliaram-se os estágios de calcificação dentária (canino, primeiro pré-molar, segundo pré-molar e segundo molar inferiores) e de maturação esquelética, pelas avaliações radiográficas da mão e punho e das vértebras cervicais. As correlações entre esses estágios foram avaliadas usando-se o coeficiente de correlação de Spearman. Adicionalmente, a associação entre os estágios em que ocorreram os picos de crescimento mandibular e de crescimento puberal e o grau de calcificação dentária foi avaliada pelo teste exato de Fisher. Resultados: todos os dentes demonstraram correlações positivas e estatisticamente significativas. A correlação mais elevada foi verificada entre o estágio de calcificação do segundo molar inferior e o estágio de maturação esquelética da mão e do punho (r= 0,758, p < 0,001) e o estágio de maturação das vértebras cervicais (r = 0,605, p < 0,001). O surto de crescimento puberal foi identificado no estágio G de calcificação do segundo molar inferior, e o pico de crescimento mandibular foi detectado no estágio F de calcificação do segundo molar. Conclusão: na amostra estudada, houve uma correlação positiva entre os estágios de calcificação dentária e os estágios de maturação esquelética avaliada nas radiografias de mão e punho e das vértebras cervicais. Os estágios de calcificação dentária do segundo molar inferior demonstraram a mais alta correlação positiva com os estágios de maturação da mão e punho e das vértebras cervicais.