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

In this study, pre and posttreatment cephalometric measurements of twenty-four cases, of which twelve had Angle Class I and twelve had Angle Class II, division 1 malocclusion were studied. Dental, skeletal and soft tissue changes were observed in both class I and class II, 1 malocclusions treated by Edgewise Technique with extraction.

In this study mean amplitude values obtained from mentalis, Masseter and OOS muscles electromyographic records of adults with normal occlusion and with Class III malocclusion were compared. As regards to Class III malocclusion, it was determined that mean amplitude values decrease and enough interference could not be formed due to the hypofunction of mentalis muscle related to mandibular protrusion and increase in low face height. There was no significant differences between normal and Class III malocclusion cases for the masseter muscle. Decrease of mean amplitude values were observed for the OOS muscle it was not showing maximal contraction due to the its hypofunction.

In this article the periodontal status of the 30 patients which were treated with Edgewise mechanics, by extraction of four first bicuspids is evaluated approximately 5 years later the active treatment. Comparison of the pocket depths between the teeth moved into extraction areas and the other teeth, is made. And also the pocket depths of the parallel and non-parallel teeth in the extraction area are compared. It is found that orthodontic treatment had no adverse effect on periodontal status in long term. But non-parallel teeth in the extraction area showed much higher values of pocket depth when compared to parallel teeth.

The main purpose of this investigation was to study the shape and size of the mandibular condyles for any correlation with type of mandibular rotation. 40 mandibular bones that belongs to modern man, and late Roman stage were examined regarding the size and shape of condyles. The cephalograms of the mandibles were taken and the type of mandibular rotation was recorded on them according to Leiba analysis. The Leiba analysis results showed statistically significant differences while, the differences between the condyle sizes were found to be insignificant between the groups.

In this case report occurrence of cavitation on the lingual enamel surfaces of teeth after orthodontic direct bonding a canine to canine lingual retainer is presented and possible reasons which might play a role in their formation was investigated by "SEM" and "electron microprobe analyzer". Although the morphologic structure is normal, a mineral loss is detected and it is thought that an easier dissolution of enamel is occurred by the penetration of saliva and plaque microorganisms throughout the enamel-resin junction.

The Frankel III appliance is used in Angle Class III, maxillary deficiency cases. The vestibular and buccal shilts changes the sagittal relationship of the jaws in Class III cases by developing the upper jaw sagittally, vertically and transversally. After 7 months of FR III treatment of an 11 year old Class III patient, the molar relationship and anterior crossbite were corrected. As the SNA angle increased, the -2 degrees ANB an le changed to 2 degrees. As there were no transversal and sagittal development in lower jaw, the upper jaw expanded transversally and sagittally. Also the FR IV appliance is used in the treatment of open-bite and bimaxillary protrusion cases.

In this study, tele radiographs of 52 military academy students neutral occlusion were taken in order to establish the deep facial structure standards of our society. Anterior and posterior lengths of cranial base, ramus height and mandibular length were measured from the cephalometric lines of these pictures. Likewise, measurements were made of Cella, Articular and Gonion angles. Average values, standard deviations and errors were obtained of all these results. These measurements were compared through biometric methods with those previously made by Björk. The anterior and posterior lengths and the ramus height show biometrically insignificant differences in these two studies. The same also applies for the Cella and Articular angles. On the other hand, the ramus height which we determined is somewhat greater and significantly different from that of Björk from the biometrical viewpoint. Furthermore, our Gonion angle is less than that of Björk, and significantly different from the biometrical standpoint. In conclusion, it is suggested that the Ramus height and Gonion angle found through our study should be utilized for our purposes in all dental interventions to be made on the individuals of this society.

This study is realized to correlate skeletal and soft tissue profiles cephalometrically on (45 males - age 20 and 20 females-average chronological age 18.2 +/- 0.58) total 65 adults with normal occlusion. For skeletal analysis GoGnSN, SNA, SNB, ANB angles and convexite and face angles which are accepted as the certain commune characteristics of profile are measured as well. Lower and upper lip positions were determined according to Steiner's "S plane" on individuals with normal dental occlusion and skeletal pattern. Having drawn soft profile and perpendicular to face plane (Na-Pg) from the tips of lips, chin and nose, thicknesses of soft tissue are measured. The mean values obtained, standard deviations and correlation coefficients were evaluated by using Systat package program. Relationships between the convexite angles and soft tissue thickness are found significant on males and lip positions and soft tissue relationships on both sexes are found meaningful.

The maxillary lateral incisors are the most frequently missing teeth after the third molars. The cases with congenitally missing lateral incisors are treated either by orthodontically closing the spaces or by space regaining for prosthetic restorations. Malocclusion is the most effective factor for selecting the treatment method. Besides the characteristics of the malocclusion and interdigitation, the colour, the shape, the size and the position of the canines effect the treatment planning. In particular, Class II Div. 1 and Cl. I anterior crowding cases are the most convenient cases for orthodontically closing the missing lateral spaces. In these cases besides the treatment of the present malocclusion the reshaping of the canines is aimed and these teeth are moved to lateral spaces. In this article the treatment of a Cl. II Div. 1 malocclusion case with congenitally maxillary missing lateral incisor with Begg technique will be presented. The changes and variations of the Begg mechanics applied for this case will be discussed.

This study has been planned to examine the effects of various orthodontic appliances on periodontal tissues and the effect of motivation from the point of oral hygiene during the usage period of these appliances. 45 individuals; 15 of them using removable appliances, 15 of them using fixed-DBS appliances and 15 of the patients treating with fixed-multiband technics, have been used. In the beginning; the pocket depths, gingival and plaque indices of all cases have been reported and then they were motivated for their oral hygiene. The measurements were repeated for each of the motivated cases after 1 month. Statistically significant difference was found only in pocket depth between the 3 groups. There were statistically significant differences in pocket depth, gingival and plaque indices values in each of the groups before and after motivation.