ABSTRACT
The purpose of this study was to evaluate vertical facial and dental changes after orthodontic treatment with extraction of first four premolars, and to find whether long facial height could influence the treatment result. Fifty-six orthodontic patients with the minimum age of 15, whose treatment plan involved extracting four first premolars, participated in the study. The patients included 30 females and 27 males. Cephalometric measurements before and after treatment were compared using a paired T-test. Independent T-test was employed to compare post treatment changes for each parameter between normal and long face groups. The same analysis performed between male and female subjectsTreatment changes revealed a significant increase in the vertical distance from the upper molar to palatal plane, the lower molar to mandibular plane and Menton to palatal plane in all groups. There was significantly more increase in most post-treatment linear measurements in males than in females, with the same direction in both genders. There were no significant differences between normal and long face in any measurement. All patients showed some extrusion of the molar teeth after extraction of the premolars. The difference between normal and long face groups was not significant
ABSTRACT
The reconstruction of facial defect in patients has a great influence in improving social status and life expectancy. On the other hand, repair and reconstruction of facial defect has always been among the most difficult prosthetic treatments. Among the problems of this procedure are improper and movable underlying tissues, lack of retention in large prostheses, improper contour or color and patient's dissatisfaction and unacceptance. Nowadays implants can decrease these problems and provide retention possible for prosthesis reconstruction on the movable tissues and will increase the patient's satisfaction. The objective of this study was presenting a case of implant supported auricular prosthesis. Traumatic 10 year old male who had been lost his right ear patient who had been referred to the department of removable prosthesis in dental school of Mashhad university of medical sciences. After recons follow by considering of esthetic and complication related prosthesis the auricular prosthesis was success
Subject(s)
Humans , Male , Child , Ear/injuries , Ear/surgery , Plastic Surgery Procedures , Treatment OutcomeABSTRACT
Dental porcelains have an important role in fabrication of the most beautiful restorations. Biocompatibility and translucency in ceramics make them one of the most agreeable restorative materials. Introduction of inceram system has been considered as a great change in the field of restoration. Inceram is made by two ways including Sprint technique and Conventional Method. The purpose of this study was comparing internal marginal gap in Sprint and conventional Alumina methods for making Inceram copings. In this in vitro study, 60-die resin-base with 6-millimeter length and 5-millimeter diameter in the cervical area were fabricated. They were prepared with a 10-degree, convergence angle and 1-millimeter shoulder width with 90-degree shoulder angle. The specimens were then divided into two groups. Next, in one 30-item group, the cores were prepared via Sprint method and in the other group, via conventional method [Alumina]. After the cores were set, they were cemented by Panavia and for measuring the rate of internal gap, the specimens were examined via optical microscope Olympus BH60 with 1-micron precision. The data were compared statistically by students t-tests [alpha=0.05]. Examining the mean internal gap between two groups, it was revealed that the mean internal gap in the Sprint group [181.6 microns] was greater than Alumina group [114.2 microns] and the difference was significant [P=0.015]. Considering the limitations of this study, marginal adaptation in Sprint method was less than conventional method of core fabricating [Alumina]