ABSTRACT
Introducción: las interferencias oclusales no controladas precozmente pueden producir desviación de la mandíbula en sentido anteroposterior o transversal. El manejo de las mordidas cruzadas se debe iniciar en el momento del diagnóstico, preferiblemente en edades tempranas, con el fin de tratarlas en el nivel primario de prevención. Objetivo: determinar el comportamiento de la maloclusión funcional causada por interferencias oclusales en niños con dentición mixta de la Escuela Primaria Mártires del Corynthia, entre octubre de 2019 y junio de 2021. Materiales y métodos: se realizó un estudio observacional descriptivo de corte transversal en la Escuela Primaria Mártires del Corynthia, del Área de Salud José Jacinto Milanés, del municipio de Matanzas, entre octubre de 2019 y junio de 2021. El universo estuvo conformado por 66 niños. Se utilizó una planilla de recolección de datos y se solicitó el consentimiento informado a los tutores de los niños. Resultados: las edades donde los niños presentaron mayor afectación fueron de 6 a 7 años y de 8 a 9 años, ambos rangos con un 10,6 %. El 27,3 % presentó interferencias oclusales y mordida cruzada posterior unilateral. El 48,5 % fue del sexo femenino y el 30,3 % tenían edades de 6 a 7 años. El 71,2 % eran simétricos y presentaron mordida cruzada posterior unilateral. Los simétricos y con línea media coincidente representaron un 36,4 %. Conclusiones: la maloclusión funcional más frecuente en niños con dentición mixta fue la mordida cruzada posterior unilateral, que se relacionó de manera directa con las interferencias oclusales. Las asimetrías faciales y la línea media desviada estuvieron asociadas a dicha maloclusión.
Introduction: early uncontrolled occlusal interferences can produce anterior-posterior jaw deflection. Management of cross-bites should be initiated at the time of diagnosis, preferably at early ages, in order to treat them at the primary level of prevention. Objective: to determine the behavior of functional malocclusion caused by occlusal interferences in children with mixed dentition from the Martires del Corynthia primary school between October 2019 and June 2021. Materials and methods: a cross-sectional, observational, descriptive study was carried out at the Martires del Corynthia Primary School, of the Jose Jacinto Milanes Health Area, Matanzas municipality, between October 2019 and June 2021. The universe consisted of 66 children. A data collection form was used and informed consent was requested from the children's guardians. Results: the ages where the children presented more affectation were from 6 to 7 years and from 8 to 9 years, both ranges with 10.6%. 27.3% presented occlusal interferences and posterior unilateral cross-bite. 48.5% were female and 30.3% were 6 to 7 years old. 71.2% were symmetrical and presented unilateral posterior cross-bite. Symmetric patients and with a coincident midline represented 36.4%. Conclusions: the most frequent functional malocclusion in children with mixed dentition was the unilateral posterior cross-bite, which was related to occlusal interferences in a direct way. Facial asymmetries and a deviated midline were associated with the before mentioned malocclusion.
ABSTRACT
To evaluate the prevalence of posterior cross bite and the possible association with deleterious oral habits in 3-5-year-old children from Vitória, Espírito Santo,Brazil.Material and Methods:This retrospective observational study with a longitudinal design used as parameters for sample calculation prevalence of 35%, confidence level of 95% and error of 5%. The final random sample included 903 children, proportionally distributed according to the number of children enrolled per school. Thus, the representative sample of 9,829 children enrolled in public schools of Vitória was guaranteed. A questionnaire with six open and eighteen closed items was used to collect data on socioeconomic status, age, sex and deleterious habits. Clinical exams were carried out by trained examiners (Kappa 0.86) for posterior cross bite diagnosis. The association between variables was verified by the Chi-Square Test and Fisher Exact Test. Odds Ratio evaluated the association strength. This research was approved by the UFES Ethics Research Committee.Results:The prevalence of cross bite was of 16.2% and children that used pacifier were two times more likely to develop posterior cross bite (OR = 1.775; CI 95% = 1.242; 2.537).Conclusion:The prevalence of posterior cross bite was expressive, and thumb sucking and pacifier use were considered risk factors. Association was verified with the habit of using pacifier, increasing twice the likelihood of presenting malocclusion and posterior cross bite...
Subject(s)
Humans , Male , Female , Child , Habits , Malocclusion/diagnosis , Prevalence , Brazil , Chi-Square Distribution , Retrospective StudiesABSTRACT
Introducción. La mordida cruzada posterior es una maloclusión con una prevalencia reportada entre 5 y 27% de los individuos, dependiendo de la edad y características de la población estudiada. Debido a la información existente hasta este momento, donde los factores de riesgo no son específicos; el propósito de este estudio fue conocer la prevalencia de mordida cruzada posterior y los factores de riesgo potenciales que dan lugar a su aparición (erupción ectópica, respiración bucal, succión digital, interferencias oclusales y grupo edad). Material y métodos. Se llevó a cabo un estudio transversal en una población de 1 000 niños de 4 a 9 años de edad en ciudad Nezahualcóyotl, a los cuales se les hizo una exploración intrabucal, valorando la oclusión y análisis funcional. Se efectuó un análisis univariado y de regresión logística con el paquete estadístico SPSS versión 10.0. Resultados. La prevalencia de mordida cruzada posterior fue de 11.3%; dividido en 5.4% con mordida cruzada unilateral; 1.5% mordida cruzada bilateral, 4.8% abarcando un solo diente; por sexo se observó con mayor frecuencia en los niños. Los factores de riesgo que mostraron significancia estadística fueron: erupción ectópica, interferencia oclusal y edad. Con el análisis multivariado se observó que la erupción ectópica y la interferencia oclusal permanecen como los factores de riesgo más importante (P <0.001). Conclusión. La prevalencia de mordida cruzada posterior es alta y la mayor dependencia está dada por erupción ectópica e interferencias oclusales; por lo que es necesario la detección y corrección temprana de cualquier anormalidad en la oclusión dentaria lo que permitirá corregir defectos en el crecimiento dento facial.
Introduction. Posterior cross bite is a malocclusion with a prevalence reported from 5 till 27% of individuals, depending on age and the features of the population studied, due to the existing information at the moment which the risk factors are not specific, the purpose of the present study was to know the prevalence of posterior cross bite and the potential factors of risk which may cause its appearance (ectopic dental eruption, mouth breathing, finger sucking, occlusal disturbances, and age). Material and methods. It was carried out a cross-section study in a population of 1 000 children from 4 till 9 years old in Ciudad Nezahualcoyotl (a suburb of Mexico City), which were undergone to intraoral examination assessing occlusion and functional analysis. Univariate and logistic regression analyses were executed with the statistical software SPSS version 10.0. Results. The prevalence of posterior cross bite was 11.3%, with the following breakdown: 5.4% having unilateral cross bite; 1.5% having bilateral cross bite; 4.8% being affected one tooth only; in the sex structure more prevalence in boys was observed. The factors of risk, which showed statistical significance, were: ectopic eruption, occlusal interference, and group age. Using multivariate analysis, it was observed that ectopic eruption and occlusal interference are the more important risk factors (P < 0.001). Conclusion. Prevalence of posterior cross bite is high and the greatest dependency is produced by ectopic eruption and occlusal interferences, being necessary the early detection and correction of any abnormalities in the tooth occlusion, which would allow correcting disturbances in the dent facial growth.
ABSTRACT
The purpose of this study was to evaluate whether the basal bone of maxilla was expanded transversely by rapid palatal expansion through the posteroanterior cephalometric analysis. Thirty patients with the maxillary deficiency were utilized in this study, The posteranterior cephlometric X-ray film taken twice, before and after rapid palatal expansion. The obtained results were as follows : 1. There was a significant increase of the maixllary width by rapid palatal expansion in male and female.(p<0.001) 2. there was no significant difference between the male and female in the expansion of the maxillary width by rapid palatal expansion. 3. There was a significant increase of the mixillary by rapid palatal expansion in th both of before and after the puberty. 4. There was no significant difference between before and after the puberty in the expansion of the maxillary width by rapid palatal expansion.
Subject(s)
Adolescent , Female , Humans , Male , Maxilla , Puberty , X-Ray FilmABSTRACT
Despite orthodontic treatment(tooth moving) is dynamic act, many orthodontists have used mainly static evaluation method for evaluating effectiveness of the orthodontic appliances. They want to find which is better appliance, especially in the treatment results and treatment period, when they chose one appliance from sugessted appliances for obtaining same treatment goal. The author and colleagues invented and manufactured new machine for getting information about the relative effectiveness from many suggested orthodontic appliances and we named it Calorific machine. We used this Calorific machine to find the relative differences about tooth moving mechanism and tooth moving time between the Burstone's PLA(single force mechanism) and Molar-up's PLA(couple mechanism) for correcting the posterior cross bite. We measured the distance of tooth moving on the occlusal X-ray film and recorded the moving time of the anchored(control elct o-thermal tooth) and lingually tipped lower second molars(experimental electro-thermal tooth) and then processed paired t-est by SAS program The results were as follows. 1. Molar-up's PLA showed more extrusive and horizontal movement than Burstone's PLA at the lingually tipped molar(p=0.0000). 2. There is no finding of tooth movement by Molar-up's PLA at the uprighted molar(p=o.3475) but Burstone's PLA showed a little change(02 mm) at the same molar(p=O.0001). 3. Burstone's PLA took 17.8 minutes for tooth moving but Molar-up's PLA took only 3.8 minutes(p=0.0001)