Turk ortodonti dergisi : Ortodonti Derneg'nin resmi yayin organidir = Turkish journal of orthodontics最新文献

The main factor of the success in treating the functional Cl III case is to treat the patient in an early stage. For this purpose, today the chin-cap, combined with bite plate and FR III appliances are used. In this article we tried to introduce the FR III appliance and also wanted to demonstrate two cases whom were treated by us.

In this study, the effect of Begg technique therapy was investigated in cases with excess overbite. The sample consisted of 20 cephalometric films of 10 individuals who passed their active growth period. 20 parameters were measured on every lateral cephalometric film. Differences according to treatment were compared by paired t-test. As a result, the elimination of overbite seemed to be related to dentoalveolar factors.

Reference planes are frequently used in cephalometric researches in order to obtain more reliable results. For this purpose, different reference planes are used. Does the utilization of different reference planes make no difference in the results obtained or do they affect them? The aim of this study is to find an answer to this question. By establishing two different reference planes on the same tracings; the distances of certain anatomic points to these planes are measured on the pre-post treatment and control films. Then, the pre-post means of these measurements are evaluated by t-test. As a result, it is found out that the means and the results of t-test may give different conclusions at the same points of different planes.

This study was performed on two cephalometric films of each fourteen subjects with skeletal class 1 facial structure and Angle Class II molar relation treated with cervical headgear for a period 0.777 +/- 0.06 years; and of each thirteen control subjects with skeletal class 1 facial structures and normal occlusion observed for a period of 0.807 +/- 0.03 years. The correlation coefficients for the longitudinal changes of angular and linear measurements during control and treatment periods in both groups were evaluated. The correlation coefficients belonging to each group were compared; and the compensational regions during cervical traction were investigated. It was concluded that; the structural compensations occurred in the mandible according to the inhibition of the mesial migration of lower permanent first molars because of the interdigitation with the upper ones were the increase in the ramus inclination, change in the growth pattern of the mandibular condyle, increases in the gonial angle, lower anterior facial height and the mandibular plane angle.

In this study, vertical differences in the anterior region of Class II, division 1 patients treated with different techniques has been investigated. Sixteen (16) extraction cases treated with fixed appliances, twelve (12) treated with activator and twenty (20) cases for control group were examined. The age differed between 10 to 13 No sex difference was made. Tracings were made on 96 before and after treatment cephalometric radiographs and linear dimensions were measured by using Coben Coordinate Analysis. The findings were evaluated by statistical methods. As a result, it was found that there was no difference between two techniques in treatment.

Examinations were based on lateral cephalometric changes in sagittal extent. For this purpose, The FR-3 appliance was tried out on total 13 patients (5 female and 8 male) Who have skeletal Angle Class III malocclusion due to maxillary inadequacy. The changes in the sagittal direction on lateral cephalograms and the findings obtained as a result of treatment, were compared with the usual grow up and maturation values. Then, whole data were evaluated biostatistically. Consequently, all results showed that, although FR-3 appliance can be used on this type of malocclusions, good patient cooperation and knowing the individual optimal grow-up models are extremely important and necessary.

In the present study, thirty cephalometric films which had been used in three different investigations using almost the same parameters were selected and divided into two groups. Twenty-three parameters in the first group and nine parameters in the second, which were used in two and three investigations respectively, were statistically compared. Paired t test was used in the first group and variance analysis in the second group. In conclusion, a lot of parameters exhibited statistically significant variability, while some of them were not.

Recently a great deal of attention has been devoted to the spread of hepatitis b and aids viruses and the high risk of contamination of these viruses during the dental operations has made orthodontists more aware of the necessity of sterilization and disinfection. This article discusses the methods of sterilization and disinfection. Avoidance of corrosion of instruments and the use of a ultrasonic cleaner to avoid contamination has been explained. In the conclusion the measures that the orthodontist has to take in order to protect himself is discussed.

The authors suggest a taxonomy and a specific terminology for vertical maxillo/mandibular excess dysmorphies, "Long face" or "High face". They distinguish three anomalies which may, separate or in association, cause an increased vertical dimension of face; a. Hypsomaxillia, b. Hypsogenia, c. Hypsostomy. In this paper a case of "Long face" and its surgical treatment will be presented.

The aim of this study was to evaluate the vertical skeletal and dentoalveolar changes in the Class II Division 1 cases treated with the activator + occipital headgear combination. The present study was performed on 40 subjects and comprised 20 subjects who had undergone activator + occipital headgear therapy and 20 control subjects who had received no orthodontic treatment. 15 linear and angular measurements were performed on 80 lateral cephalometric films of 40 subjects. By comparing the treatment and control groups, the changes related to growth was eliminated and following results were obtained: SNA and ANB angles were reduced in treatment group (p less than 0.01) and the difference between treatment and control groups were statistically significant (p less than 0.01). Jarabak ratio did not show any change in the treatment group but decreased in the control group (p less than 0.05) and the difference between treatment and control groups was statistically significant (p less than 0.05). The growth of lower anterior alveolar height was inhibited by treatment when compared to control group (p less than 0.01).