Objectives:Malocclusion, though not life-threatening, has vast impact on individual’s social interactions and self-esteem. Therefore, the aim of the current study was to assess whether orthodontic treatment of adolescents with malocclusion had any association with their oral health-related quality of life (OHRQoL).Methods:The subjects for this study were recruited at a state-funded university clinic. Data were collected from 100 participants aged 17 to 21 with moderate to severe malocclusion. Experimental group comprised of 50 subjects who were in the retention phase of their orthodontic treatment and the control group comprised of 50 untreated subjects. The shortened version of the Oral Health Impacts Profile (OHIP-14) as used to assess the subjects’ oral health-related impact. T-test, Kruskal-Wallis, and Mann Whitney tests were used to analyze the data and p-value was set at P < 0.05.Results:In general, oral health-related quality of life of all subjects significantly improved after orthodontic treatment. (p<0.001) Subjects with moderate malocclusion showed better improvement than severe malocclusion subjects. (P<0.001)Conclusion:This study showed that oral health-related quality of life improves with the treatment of malocclusion.

The aim of the current study was an in vivo evaluation of the bacterial adhesion on TiN coated orthodontic stainless steel wires in 20 patients (age15-25) undergoing fi xed orthodontic treatment who have the indication for placement of 0.019 ×0.0 25 inch Stainless steel arch wires in both jaws. TiN coatings were formed on orthodontic stainless steel wires by physical vapor deposition (PVD), Then the accuracy of the procedure was detected using SEM microscopy (PHILIPS XL 30) at ×2000 magnify. Each patient will serve as their own control, the coated arch wires will randomly be assigned to one jaw and the opposing jaw will receive a non-coated arch wires. After 4 weeks, the arch wires will be removed and cut at the same lengths (20mm). The samples were placed in sterile dishes containing phosphate buffered saline. After separation of bacteria in trypsin (25%) and ethylene di-amine teta-acetic solutions for 45 minutes, the diluted solution was cultured in blood agar and bacterial colony forming units were counted. According to the results, signifi cant difference detected on colony count on TiN coated orthodontic stainless steel wire (4 ± 3.4 ×10 4 ) compared to non-coated orthodontic stainless steel wire (8 ± 7.4 × 10 4 ) (P = 0.03). These results suggested that the TiN coated orthodontic stainless steel wire decreased bacterial growth and enhanced oral hygiene.

Background Considering the adverse consequences of respiratory insufficiency in cleft lip and palate (CLP) patients, this study aimed to assess the pharyngeal airway dimensions in 9–12-year-old patients with unilateral CLP. This historical cohort evaluated the cone-beam computed tomography (CBCT) scans of 30 patients with non-syndromic unilateral CLP between 9 and 12 years and 30 age- and sex-matched non-cleft controls. Three-dimensional (3D) images were reconstructed by the Mimics software, and the nasopharyngeal, oropharyngeal, and total airway volumes, as well as the minimal cross-sectional area of the airway (minAx), and posterior airway length (PAL) were all measured in the sagittal plane. Data were analyzed by the Student’s t test. Results The oropharyngeal and the total airway volumes, as well as the minAx and PAL in CLP patients, were significantly smaller than the corresponding values in the control group (P < 0.05). Despite smaller nasopharyngeal airway volume in CLP patients than controls, this difference was not statistically significant (P > 0.05). Conclusions Nine- to twelve-year-old non-syndromic unilateral CLP patients have smaller pharyngeal airway dimensions than non-cleft controls, and are therefore at higher risk of respiratory insufficiency.

The aim of this study was to assess the effect of different orthodontic treatment needs on the oral health-related quality of life of young people aged 15-17. Methods. 684 (343 boys and 341 girls) school children aged 15 to 17 years were selected at random from 12 schools to represent the four main areas of Tehran. Malocclusion of the subjects was determined with the Dental Health Component (DHC) of Index of Orthodontic Treatment Need (IOTN). Participants also completed the shortened version Oral Health Impact Profile questionnaire (OHIP-14). Chi-Square test was used to analyze the data Results. 41 of the subjects had previous orthodontic treatment or were being treated at the time of study. 413, 172, and 58 of the subjects had little or no, borderline, and actual need for orthodontic treatment, respectively. Orthodontic treatment need significantly affected all daily activities in both male and female subjects. Conclusions. Malocclusion has a negative impact on both physical and psychological aspects of the daily life of subjects who are in definite need for orthodontic treatment.

Introduction Formation of oronasal fistula is a common complication after surgical closure of cleft lip and palate (CLP). This study aimed to compare the maxillary sinus volume in 9-12-year-old CLP patients with and without an oronasal fistula who had undergone surgical closure of the cleft at 1 year of age, using cone-beam computed tomography (CBCT). Methodology This descriptive, cross-sectional, analytical study was conducted on CBCT scans of 50 patients with unilateral CLP who were between 9-12 years and had undergone surgical closure of the cleft at 1 year of age in two groups with and without an oronasal fistula (n=50). The patients were selected among those presenting to a private orthodontic office between 2001-2009 and already had CBCT scans taken for orthodontic treatment. The 3D CBCT scans were reconstructed with Mimics software, and the volume of the maxillary sinuses was measured on the images. Data were compared using t-test. Results The maxillary sinus volume was significantly smaller in patients with oronasal fistula compared with those without it (9510.7±492 mm3 vs. 10278.2±512 mm3, P<0.000). The maxillary sinus of the affected side was smaller than that of the unaffected side in both groups of patients with and without an oronasal fistula (P<0.05). Conclusion IImmature patients with unilateral CLP and oronasal fistula have a smaller maxillary sinus than unilateral CLP patients without an oronasal fistula, and may be at higher risk of respiratory infections.

Introduction: To assess the effects of cleft lip and palate (CLP) on the temporomandibular joint (TMJ) components using cone-beam computed tomography (CBCT). Methodology: This historical cohort study evaluated 20 CBCT scans of the TMJ area of patients with unilateral CLP as the test group and 20 CBCT scans of the TMJ area of non-CLP controls with class I occlusion. The morphological properties and dimensions of the condyle, the thickness of the glenoid fossa and articular eminence, and the articular eminence angle were measured and recorded. The two groups were compared regarding the above-mentioned variables by the Chi-square or t test (alpha=0.05). Results: The left and right axial condylar angles in CLP patients were significantly lower than the corresponding values in the control group by 1.8 degrees in the left and 2 degrees in the right side (p=0.005). The mediolateral condylar dimension at both sides was significantly lower in CLP patients than in the controls (p=0.001). The differences between the two groups were not significant in the anteroposterior condylar dimension, glenoid fossa thickness, and articular eminence thickness (p>0.05). The CLP patients had significantly lower articular eminence angle in the right side (p=0.016) but not in the left side (p>0.05), compared with the controls. Conclusion: Unilateral CLP patients have lower axial condylar angle and mediolateral condylar dimension at both sides, and lower articular eminence angle in the right side than the controls.

Introduction To assess the effects of cleft lip and palate (CLP) on the temporomandibular joint (TMJ) components using cone-beam computed tomography (CBCT). Methodology This historical cohort study evaluated 20 CBCT scans of the TMJ area of patients with unilateral CLP as the test group and 20 CBCT scans of the TMJ area of non-CLP controls with class I occlusion. The morphological properties and dimensions of the condyle, the thickness of the glenoid fossa and articular eminence, and the articular eminence angle were measured and recorded. The two groups were compared regarding the above-mentioned variables by the Chi-square or t test (alpha=0.05). Results The left and right axial condylar angles in CLP patients were significantly lower than the corresponding values in the control group by 1.8 degrees in the left and 2 degrees in the right side (p=0.005). The mediolateral condylar dimension at both sides was significantly lower in CLP patients than in the controls (p=0.001). The differences between the two groups were not significant in the anteroposterior condylar dimension, glenoid fossa thickness, and articular eminence thickness (p>0.05). The CLP patients had significantly lower articular eminence angle in the right side (p=0.016) but not in the left side (p>0.05), compared with the controls. Conclusion Unilateral CLP patients have lower axial condylar angle and mediolateral condylar dimension at both sides, and lower articular eminence angle in the right side than the controls.