Finding of Third Lower Molar in Prosthetic Croatian Patients.

Background: The third molar is different in many ways from all the other teeth. The aim of this study was to examine how often the third lower molars are chosen as abutment tooth. Methods: A total of 228 OPG was analyzed. The number of lower third molars (M3s) present per person as well as on the right or the left side of the mandible and their relationships, for both males and females were examined, taking into account personal data, collected from clinical records. Collected data were subjected to statistical analysis set to p≤ 0.15. The patients were aged 30 to 87 years (x¯ =49. 22; sd.13.06) with equal representation of all ages. Results: 188 patients, or 82%, has both lower third molar. Angulations of third molar was measured from 0 - 90o (x=69. 65, sd.11.67). On more retained tooth higher angulation is measured (p=0.17). It was extracted 18 (8%) left and 22(10%) of right third molar. More extracted third molars (p=0.21) and healing tooth (P=0.18) were found in elderly patient. Higher percentages were recorded for females but based on χ2 statistics this difference was not found to be statistically significant. 205 findings or 90% was with vital third molar. Endodontic treatment was done on 7 left and 15 right wisdom teeth, more in men than in woman. As abutment teeth 37 third lower molar or 16% left and 13% right were found. Conclusion: Lower third molar can be adequate abutment tooth for fixed prosthetic appliances and that is something that needs to be evaluated in prosthetic treatment planning.

Evaluation and comparison of forehead angulations using cephalometrics between male and female human subjects.

Introduction: Sex identification is one of the important aspects of forensic sciences and many methods have been widely used for the same. Use of cephalometrics to establish age, sex and race has been adopted by forensic odontologists. But forehead angulations and quantitative measurements of its curvature to establish sex have been less explored. With above background a cross-sectional study was designed to evaluate and compare the angulations of the forehead at defined points between human male and female subjects. Materials and Method: Present study was conducted on 100 subjects. Lateral cephalogram obtained from 50 males and 50 females with age range of 18-26 years were transcribed on acetate sheet. Angulations on forehead and one linear measurement were calculated. Data was stored for analysis. Results: Mean values of angle A, B and C were lower and AD segment was higher in male group when compared to female group. Comparison of mean values of angle B and AD segment between males and females showed statistically significant difference (p value < 0.05). Coefficient of variation of AD segment was least among all variables. Conclusion: We concluded that, angle of curvature was higher in females as compared to males supporting the round forehead in female. Further, the proposed hairline in male was found to be slightly higher when compared to female.

Indirect Bonding With Various Bracket System In Lingual Orthodontics.

The indirect bonding technique is pivotal for success in lingual orthodontics. There are different laboratory techniques available for indirect positioning and bonding of lingual brackets. The HIRO system is one of the most used and easy to perform. At the early stages of the 80's, most of the practitioners and the patients have been seduced by lingual But the difficulties of the technique have rapidly given a disappointment. Today ten years later the authors present the progress which have been realized: the evolution of the brackets, the accuracy of their placement in the lab procedures, the making of the wire, the increase in patient's comfort. So this article attempts to review some of the advantages, disadvantages, bracket systems and laboratory procedures of lingual orthodontics.

Postura craneocervical en pacientes infantiles después de la terapia con mentonera: un estudio piloto / Craneocervical posture in children after treatment with chincap: a pilot study

Introducción: el propósito del presente estudio fue describir los cambios en la postura craneocervical en unapoblación infantil con clase II esquelética por prognatismo mandibular, luego de la utilización de mentonera con placa de acetato inferior para levantar la mordida. Métodos: la muestra consistió de once niños (siete niñas y cuatro niños). A cada niño le fueron tomadas tres radiografías cefálicas laterales en posición natural de cabeza (mirando de frente a un espejo), con ligero contacto oclusal. La primera radiografía (T1) fue tomada antes de iniciar la utilización de la mentonera, la segunda (T2), cuatro meses después de su uso y la tercera (T3), cuatro meses después de retirada. Para el análisis se emplearon medidas lineales y angulares, se realizó análisis descriptivo de las variables y se utilizaron las pruebas de normalidad (Shapiro-Wilk) y Friedman. Resultados: el análisis estadístico no mostró diferencias significativas en ninguna de las variables analizadas, y en ninguno de los momentos evaluados. Conclusión: a pesar de la gran variabilidad individual en la postura craneal, cervical y craneocervical de los niños evaluados, en general no se observaron en esta muestra cambios significativos en la columna cervical, luego del tratamiento con mentonera y placa de acetato inferior que levantaba la mordida.

Introduction: the aim of this study was to describe the changes in the craniocervical posture in children with skeletal class II malocclusion (prognathic mandible) after wearing chincap with lower occlusal bite plane. Methods: the sample consisted of eleven children (7 girls and 4 boys). Three lateral cephalic radiographs were taken for each child with the head in natural position (“mirror position”), with light occlusal contact. The first radiograph (T1) was taken before wearing the chincap, the second (T2) was taken four months after wearing the appliance and the third (T3) was taken four months after removing the chincap. Specific angular and linear dimensions were used, the comparison within the group was performed using Descriptive Analysis and the Normality (Shapiro-Wilk) y Friedman Signed Rank Test. Results: statistical analysis didn’t show significant changes in any of the angular and linear measurements analyzed nor at any of the times studied. Conclusion: even though there is a great individual variability in the cranial, cervical and craniocervical posture of the tested children, in general, there were nostatistical significant changes in cervical posture after treatment with chincap and lower occlusal bite plane.

The correlation study of the applied anatomy of internal carotid artery with brain DSA / 介入放射学杂志

Objective To provide the exact anatomic basis for guidance of inserting catheter promptly.Methods Thirty five cases of adult crania were fixed by 10% liquor formaldehyde. In turn with precise discection of surrounding tissues and exposing carotid C 5～C 1 segments, paid attention to observe and measure vessel's trend, angulations, and direction of routes. Analysis of 50 cases of negative result of normal brain DSA is then taken as the basis for further application. Results Angulations of siphon were divided into 3 kinds of angulation and 1 characteristic curve but, the difference with the counter part is insignificant. Conclusions Mastering the applied anatomy of carotid could improve catheter maneuver and the rate of success.