[Digital comparison of cephalometric standards between 9 to 11 year old Iranians and American Caucasions, after 2 years follow up with dentofacial planner software]

Nowadays cephalometric software have become very popular, but due to racial and ethnical difference in facial soft and hard tissue features the norms should be adapted for each nation. The purpose of this study was to establish soft and hard tissue data base for 9 to 11 years Iranian children and to compare it with Legan and Ricketts dentofacial planner plus norms for American Caucasians. This was a longitudinal descriptive study on 60 cephalograms of normal 9-11 years Iranian children in city of Qazvin. They were selected as normal occlusion cases according to Moyer's. The cephalograms were scanned and 13 landmarks for Legan soft tissue and 32 landmarks for Ricketts hard tissue analysis were digitized. Then by means of Dentofacial planner plus 11 measurements were calculated for each age group [20 in each age 9, 10, 11 years]. The mean for each landmark was compared to American Caucasian norms in the databank by Paired t test. Nine years old Iranian girls had more facial convexity, nasolabial angle, upper and lower lip protrusion and height of midface but their lower face height was less. In boys, middle face height was the same as American's and nasolabial angle differed less. In 11 year old girls the difference between lower face height and lip protrusion became less, boy's nasolabial angle was more than American's. Significant differences were present in soft and hard tissue norms of Iranian's in comparison to American Caucasions. Iranian data base for cephalometric norms should he established

[Assessment of the frequency of the need and demand for orthodontic treatment among Kerman guidance school's pupils, 2005 -2006]

Nowadays, dentofacial deformity is one of the most common problems which can influence all aspects of human's life. Howerer, not all people with these deformities are aware of their problem and even refuse to seek orthodontic treatment. The aim of this study was to assess the need and demand for orthodontic treatment among guidance school's pupils in the year 2005- 2006. In this cross sectional study 750 students including 420 girls and 330 boys from guidance school were examined. The clinical occlusal relationships were evaluated, then the need for orthodontic treatment was estimated by using Index of Treatment Need [IOTN]. Demand was assessed with a closed questionnaire containing reasons for acceptance or refusal of orthodontic treatment. Overall frequency of malocclusion was 50.55% with a higher frequncy among girls [p<0.05], compare to boys 41.53% of the pupils, most of them with increased overbite, sought orthodontic treatment. The demand for treatment was the same in boys and girls in mild malocclusions, but in severe cases girls had more demand. The demand rate was significantly higher in pupils with high socioeconomic levels [p<0.05], parents education had no significant effect on this value. Considering our findings, seeking orthodontic treatment in pupils with dentofacial deformity is not based on parents' education, but economic condition is a major limiting factor in this field

Cambios dimensionales en los arcos dentales con el regulador de función Frankel-1 / Dimensional changes en the dental arches with the function regulator Frankel-I

El propósito de esta investigación fue evaluar la eficacia y estabilidad del regulador de función Frankel-1 en la resolución del apiñamiento dental en un grupo colombiano. Fue un estudio descriptivo realizado en 14 pacientes entre 7-9 años de edad, sin tratamiento ortodóntico previo, de bajo nivel socioeconómico, y tomados de una de las escuelas donde la Pontificia Universidad Javeriana presta sus servicios. Se evaluaron cambios dimensionales después de tres años de uso del aparato, midiendo la longitud de arco, distancias intercolar e intercanina en los dos arcos, e índice de irregularidad de Little descrito en la literatura. Los resultados se compararon con una muestra control reportada en la literatura, lo mismo que con un grupo control de población combinada. Se obtuvieron cambios significativos de aumento en las dimensiones trasversales de los arcos, siendo mayores en el arco inferior, y reducción en el índice de irregularidad.

Cambios en la relación sagital intermaxilar en tratamientos interceptivos de formas progénicas / Changes in sagital intermaxilliary relation in interceptives treatments of progenic form

Con el ánimo de estudiar si el tratamiento interceptivo influye en la relación intermaxilar sagital esqueletal y en el perfil blando en pacientes con progenie verdadera o forma progénica por acomodación, seleccionamos una muestra de 14 pacientes en dntición temporal completa o mixta primera fase con tales anomalías atendidos en el Area de Ortopedia Dentomaxilar de la Facultad de Odontología de la Universidad de Chile. Los pacientes fueron tratados de dos maneras diferentes: 7 con aparato removible intraoral y 7 con aparato removible intraoral y aparato estraoral tipo casquete-mentonera. Posteriormente, usando teleradiografías de perfil, comparamos los exámenes cefalométricos iniciales con los finales en ambos grupos, tanto en tejidos duros como a nivel de perfil blando y los resultados en un grupo con los del otro. Se llegó a la conclusión que se producían cambios atribuibles al tratamiento sólo en el grupo tratado con aparato removible intraoral y casquete-mentonera