COMPARISON THE DIFFERENT TYPES OF BONDING TECHNIQUES EFFECTS ON WHITE SPOT LESION FORMATION

COMPARISON THE DIFFERENT TYPES OF BONDING TECHNIQUES EFFECTS ON WHITE SPOT LESION FORMATIONTaner OZTURK*, Onur Aykan ATILLA**, Mustafa Murat ERUZ***, Ahmet YAGCI** Erciyes University, Faculty of Dentistry, Department of Orthodontics, Kayseri, Turkey**Osmanli Dental Center, Republic of Turkey Ministry of Health, Ankara, Turkey*** Private Practice, Kayseri, TurkeyBackground: White spot lesions (WS) are a frequent side effect of the fixed orthodontic treatment. This prospective study aimed to evaluate any difference between the formation of white spot lesion with indirect and direct bonding in patients who treated by fixed orthodontic treatment.Material&amp;Method: The records of 20 patients evaluated who were randomly distributed among the groups as indirect bonding group (n:10) and direct bonding group (n:10). All patients were treated with non-extraction orthodontic treatment throughout a mean of 1,5&plusmn;0,6 years. The records were taken by the quantitative light-induced fluorescence (QLF) method to determine enamel demineralization before and after treatment in the study. The images analyzed and fluorescence changes (&Delta;F, &Delta;Fmax, &Delta;Q and WS area) were recorded. &nbsp;Statistical evaluation of differences between groups at the end of treatment was made by Mann-Whitney U test. Wilcoxon signed rank test was used for intra-group comparisons.Results: After treatment, direct bonding group had a significantly higher value of fluorescence loss compared to indirect bonding group (p&lt;0,05). In the indirect bonding group, there was only a significant WSL formation in left mandibular canine.Conclusion: The use of indirect bonding techniques at the beginning of orthodontic treatment can reduce WSL formation.Keywords: White spot lesion, bonding technique, fluorescence loss</p

Mandibular asymmetry in unilateral and bilateral posterior crossbite patients using cone-beam computed tomography

Objective: To test the hypotheses that (1) there is no difference in mandibular asymmetry between the crossbite and normal side in a unilateral crossbite group (UCG) and between the right and left sides in a bilateral crossbite group (BCG) and a control group (CG); and (2) there is no significant difference in mandibular asymmetry among crossbite groups and control group

Cone-beam computed tomography assessment of mandibular asymmetry in unilateral cleft lip and palate patients

Objective: To determine whether there is any difference between the cleft and non-cleft sides of the mandible in unilateral cleft lip and palate (UCLP) patients, or the right and left sides in control patients; and to determine if there is any difference between the mandibular asymmetry of UCLP patients and that of control patients. Methods: We examined cone-beam computed tomography (CBCT) scans of 15 patients with UCLP and 15 age- and gender-matched control patients. We evaluated 8 linear, 3 surface, and 3 volumetric measurements and compared the cleft/non-cleft sides of UCLP patients and the right/left sides of controls. Results: There were no statistically significant gender differences in any linear, surface, or volumetric measurement. The single significant side-to-side difference in UCLP patients was a longer coronoid unit on the cleft side than on the non-cleft side (p = 0.046). Body volume was significantly lower in the UCLP group than in the control group (p = 0.008). Conclusions: In general, UCLP patients have symmetrical mandibles, although the coronoid unit length is significantly longer on the cleft side than on the non-cleft side. UCLP patients and controls differed only in body volume. (Korean J Orthod 2011;41(6): 431-439

Mandibular asymmetry in unilateral and bilateral posterior crossbite patients using cone-beam computed tomography

Objective: To test the hypotheses that (1) there is no difference in mandibular asymmetry between the crossbite and normal side in a unilateral crossbite group (UCG) and between the right and left sides in a bilateral crossbite group (BCG) and a control group (CG); and (2) there is no significant difference in mandibular asymmetry among crossbite groups and control group

Changes in mandibular transversal arch dimensions after rapid maxillary expansion procedure assessed through cone-beam computed tomography

Objective: This study aimed at evaluating the changes in mandibular arch widths and buccolingual inclinations of mandibular posterior teeth after rapid maxillary expansion (RME). Methods: Baseline and post-expansion cone-beam computed tomographic (CBCT) images of patients who initially had bilateral posterior cross-bite and underwent RME with a banded-type expander were assessed in this study. The patients included 9 boys (mean age: 13.97 +/- 1.17 years) and 11 girls (mean age: 13.53 +/- 2.12 years). Images obtained 6 months after retention were available for 10 of these patients. Eighteen angular and 43 linear measurements were performed for the maxilla and mandible. The measurements were performed on frontally clipped images at the following time points; before expansion (T1), after expansion (T2), and after retention (T3). Statistical significance was assessed with paired sample t-test at p < 0.05. Results: T1-T2 comparisons showed statistically significant post-RME increases for all measurements; similarly, T2-T1 and T3-T1 comparisons showed statistically significant changes. The maxillary linear and angular measurements showed decreases after expansion, and mandibular linear and angular measurements increased after retention. Conclusion: All mandibular arch widths increased and mandibular posterior teeth were uprighted after RME procedure. (Korean J Orthod 2011;41(3)200-210