Condylar Disc Relationships And Vibration Energy In Asymptomatic Class 19-To 12-Year Olds

A proper diagnosis is the key to successful treatment. The purpose of this study was to evaluate the temporomandibular joints (TMJ) by means of lateral and anteroposterior cephalograms, transcranial temporomandibular radiographs, magnetic resonance imaging (MRI), and TMJ electrovibratography (EVG) in asymptomatic and orthodontically untreated Angle Class I subjects. The study sample comprised 31 (13 boys, 18 girls) asymptomatic Class I children with a mean age of 9.7 years. The lateral cephalometric findings revealed that the subjects were mesofacial with an Angle Class I skeletal relationship, and the anteroposterior cephalograms showed a symmetrical craniofacial skeleton. Transcranial TMJ radiographs showed that the TMJs on both sides were symmetrically positioned. The time-frequency distributions of sounds from both right and left TMJs showed a wide range, and the vibrations measured by EVG were considerable. The MRI revealed unilateral disc displacement with reduction in four of the 31 subjects (13%), bilateral disc displacement with reduction in three subjects (10%), and bilateral disc displacement without reduction in one subject (3%). The data confirm that a standardized clinical examination to determine the status of the joint is not an efficient tool. This study suggests that the clinical diagnosis should be supported by extensive TMJ evaluation techniques.Wo

Mandibular Dental Arch Changes with Active Self‑ligating Brackets Combined with Different Archwires

Objective: The aim was to compare mandibular arch and incisor inclinational changes by comparing active self‑ligating brackets used with different forms of archwires with a control group in nonextraction cases. Materials and Methods: The sample of 50 patients with Class I malocclusion was divided into three groups: Group I was treated with active self‑ligating brackets (Nexus, Ormco/Orange, CA, USA) used with Damon arch form copper nickel‑titanium (Cu‑NiTi) and stainless steel (SS) wires; Group II was treated with interactive self‑ligating bracket system (Empower, American Orthodontics, Sheboygan, Wis, USA) used with standard Cu‑NiTi and SS wires; and Group III was treated with Roth prescribed conventional brackets (Forestadent, Pforzheim, Germany) with standard Cu‑NiTi and SS wires which was designed as a control group. Changes in dimension of mandibular arch and inclination of incisors were assessed on dental models and lateral cephalometric radiographs at pretreatment (T1) and posttreatment (T2) periods. Paired‑t test and one‑way analysis of variance were used to perform intragroup and intergroup comparisons, respectively. Results: In all groups, an average increase of transversal distances occurred from pretreatment to the osttreatment period (P < 0.05). However, mandibular arch length increase was significantly different among the Groups I‑III (P = 0.008) and I‑II (P = 0.006). No significant intergroup difference was found with regard to incisor inclinational changes. Conclusions: Bracket type had no significant effect on the mandibular  imensional or incisor inclination changes. Besides this, archwire type had only little effect on the treatment results as active self‑ligating bracket with Damon archwires increased mandibular arch length greater than other groups.Keywords: Active self‑ligating bracket, Damon archwire, mandibular arch dimensio

Orthognathic Treatment Of A Patient With Class Iii Malocclusion And Severe Facial Asymmetry: Report Of A Case

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Cephalometric Evaluation Of Maxillomandibular Relationships In Patients Wearing Complete Dentures: A Pilot Study

The purpose of this study was to evaluate the changes in vertical and sagittal max-illomandibular relationship of the patients who had been wearing dentures for an extensive period. Fifteen edentulous patients (seven men and eight women; mean age 63.5 years) who had worn dentures for six to 16 years (mean 10 years) were selected for this study. New prostheses were fabricated by conventional methods, and the patients were evaluated cephalometrically before and after the new prosthesis. The results were compared by Wilcoxon signed rank test (P < .05). Results indicated that a prognathic mandible and a pseudo Class III relationship with a reduced occlusal vertical dimension became a normal Class I maxillomandibular relation when the new prosthesis was inserted. A better facial profile was achieved.Wo

The Effects Of First Premolar Extractions On Third Molar Angulations

The purpose of this study was to determine the relationship between the inclinations of second and third molars during a two- to 2.5-year period in patients treated orthodontically both with and without premolar extractions. Records of 37 first premolar extraction patients and 33 nonextraction patients were examined. The pretreatment and posttreatment panoramic radiographs were analyzed. The angles were measured between the long axis of the third molar and the occlusal plane and between the long axis of the third molar and the long axis of the second molar. Changes in third molar angulations from pretreatment to posttreatment for two groups were compared by Mann-Whitney U-test. Statistical analysis revealed that mandibular third molars showed an improvement in angulation relative to the occlusal plane in the first premolar extraction group.Wo

Dental arch relationships in turkish patients with complete unilateral cleft lip and palate born between 1976 and 1990: A comparison with eurocleft

PubMedID: 22849640Objective: To compare the dental arch relationships of Turkish patients with complete unilateral cleft lip and palate (UCLP) with the results reported for participants in the Eurocleft study. Patients: Study models of 109 patients with complete UCLP from five university clinics in Turkey were evaluated (clinic A=25 patients, clinic B=23 patients, clinic C=20 patients, clinic D = 21 patients, and clinic E = 20 patients). The mean age of the patient cohort was nine years old (range = 8-11 years old), and the cohort was born between 1976 and 1990. Methods: The examiners rated the three-dimensional (3D) models using the GOSLON Yardstick. The scores were compared with those from the Eurocleft centers: E1(B), E2(E), E3(A), E4(F), E5(C), and E6(D). Intra- and interexaminer agreements were evaluated using weighted kappa statistics. Results: The mean GOSLON scores for the Turkish clinics were as follows: clinic A = 3.16, clinic B = 3.13, clinic C = 3.25, clinic D =3.67, and clinic E = 3.70. Scores for three of the Turkish clinics (A, B, and C) were significantly worse than the scores for the three best Eurocleft centers, E1(B), E2(E), and E3(A) (P , .001, P , .001, and P , .05, respectively). Scores for two of the Turkish clinics (D and E) were similar to those for Eurocleft center E6(D) but worse than the scores for the other Eurocleft centers (P , .01, P , .001, respectively). Conclusions: This was the first study in which three-dimensional models were used to derive scores to compare with those of the Eurocleft centers. According to the results of analysis of 109 3D models, 50.4 % of the patients in Turkey were classified as GOSLON score 4 and 5. This may have been attributable to poor surgical procedures, low-volume surgeons, and the decentralized treatment approach in Turkey between 1985 and 2000. Further research is needed to assess the situation in Turkey in more recent years. © Copyright 2014 American Cleft Palate-Craniofacial Association