Effect of Mobile Phone with and without Earphones Usage on Nickel Ion Release from Fixed Orthodontic Appliance.

INTRODUCTION: This study is an attempt to assess whether the usage of headphones could minimize the nickel ion release from fixed orthodontic appliance compared with hand-held mobile phones. The aim of the study is to validate the hypothesis whether there is a significant variation in nickel ion release from fixed orthodontic appliance among the patients using hand-held mobile phones and patients using mobile earphones. MATERIALS AND METHODS: This is a cross-sectional study where a total of 60 healthy individuals who were undergoing fixed orthodontic treatment in the Department of Orthodontics and Dentofacial Orthopedics, Adhiparasakthi Dental College and Hospital, Melmaruvathur, Chennai, India, and all these individuals were bonded and banded. All of them are class I malocclusion with bimaxillary protrusion. Salivary samples were collected in their regular checkup after two months and 7th, 14th, and 21st days salivary nickel level was evaluated based on their usage of mobile phones with earphones and without earphones. RESULTS: In this study, paired and independent t-tests were used. On basis of statistics results, the mean of nickel release in both male and female participants using mobile phones without earphones were significantly higher than the participants using mobile phone with earphones. CONCLUSION: By our study, we concluded that usage of mobile phones with earphones has a significant reduced effect on metal ion release from fixed orthodontic appliance when compared to usage of mobile phones without earphones.

Effect of Frequency of Micro-osteoperforation on Miniscrew- supported Canine Retraction: A Single-centered, Split-mouth Randomized Controlled Trial.

AIM: The present study aimed at evaluating the increase in the rate of tooth movement by increasing the number and frequency of micro-osteoperforations (MOPs). MATERIALS AND METHODS: The study was a single-center, split-mouth, randomized controlled trial. A total of 20 patients were included in the study who had fully erupted maxillary canines with class I molar canine relationship and a bimaxillary protrusion that required the removal of both maxillary and mandibular first premolars. Out of 80 samples, the experimental and controlled groups were randomly assigned. The experimental group received five MOPs in the extracted site of the first premolar before retraction, at 28th day and 56th day. The control group received no MOPs. The rate of tooth movement was measured on 28th, 56th, and 84th day on both the experimental and control sides. RESULTS: In maxillary dentition, the canine on the MOP side moved by 0.65 ± 0.21 mm, 0.74 ± 0.23 mm, and 0.87 ± 0.27 mm during 28th, 56th, and 84th day, respectively, whereas in control side the rate of tooth movement was 0.37 ± 0.09 mm, 0.43 ± 0.11 mm, and 0.47 ± 0.11 mm during 28th, 56th and 84th day, respectively, which was statistically significant (p-value = 0.000). In mandibular dentition, the canine on the MOP site has moved by 0.57 ± 0.12 mm, 0.68 ± 0.21 mm, and 0.67 ± 0.10 mm during 28th, 56th, and 84th day, respectively, whereas in control side the rate of the tooth movement was 0.34 ± 0.08 mm, 0.40 ± 0.15 mm, and 0.40 ± 0.13 mm during 28th, 56th, and 84th day, respectively, which was statistically significant. CONCLUSION: Micro-osteoperforations effectively increased the rate of tooth movement. Overall, MOPs increased the rate of canine retraction by 2-fold when compared with the control group. CLINICAL SIGNIFICANCE: Micro-osteoperforation is a proven methodology to increase the rate of tooth movement and decrease the treatment time. However, it is important to repeat the procedure during every activation to increase its effectiveness.

Efficacy of Fluoride Varnish with Casein Phosphopeptide and Amorphous Calcium Phosphate vs Fluoride Varnish in Prevention of White Spots Lesion in fixed Orthodontic Patients: In Vivo Study.

AIM: The aim of the study is to compare the in vivo efficiency of Michigan (MI) varnish containing casein phosphopeptide (CPP) and amorphous calcium phosphate (ACP) and Fluoritop containing sodium fluoride (5% NaF) in the prevention and remineralization of white spot lesions (WSLs) around orthodontic brackets at days 28 and 56 after bonding. MATERIALS AND METHODS: A total of 30 patients were selected and divided into two groups I (MI varnish) II (Fluoritop varnish) of 15 patients in each group. All the patients were bonded and then varnish was applied around the brackets. Right-side upper and lower first premolar teeth were taken as the control group and left-side upper and lower first premolar teeth as the experimental group. Also, 14, 24 teeth were extracted on day 28 after bonding and 34, 44 teeth after day 56 of bonding. Samples were collected and sent to laboratory for evaluation of surface microhardness (SMH). RESULTS: Based on the statistics results, there was a significant decrease in demineralization and an increase in remineralization of WSLs after the application of varnish. No statistical significance was found between the effectiveness of MI varnish and Fluoritop except in the cervical region. CONCLUSION: Through our study, we concluded that no statistical significance was found between the effectiveness of MI varnish and Fluoritop except in the cervical region where MI varnish was found to be more effective than Fluoritop in preventing WSLs. CLINICAL SIGNIFICANCE: The results from the above study concluded that CPP-ACP varnish can be an effective method in preventing WSLs in patients undergoing fixed orthodontic treatment.

Management of Class II Hyperdivergent Mandible by Surgically Altering Occlusal Plane Pattern through Counterclockwise Rotation of Mandible.

AIM AND OBJECTIVE: To evaluate the facial esthetic of class II hyperdivergent mandible by altering the high mandibular plane angle into an orthognathic mandibular plane angle by counterclockwise (CCW) rotation of the mandible. MATERIALS AND METHODS: Five patients with class II hyperdivergent mandible were selected for this study. Initially, preorthodontics was done by aligning the teeth. Then, surgically, bilateral sagittal split osteotomy (BSSO) advancement with CCW rotation of mandible with a posterior open bite of 4 mm was done. Eleven linear and 11 angular measurements were taken. Pre- and postsurgical values were evaluated by composite cephalometric analysis, and the changes in the occlusal plane and facial height were statistically analyzed by using paired t-test. Jarabak ratio was calculated for facial height measurements. Further finishing will be done by postsurgical orthodontic procedures to get functional occlusion. RESULTS: Change in occlusion to class I is seen in values of Jarabak ratio and Go-Gn. Jarabak ratio shows an increase in posterior and decreases in anterior facial height. Go-Gn, which implies the CCW movement of the mandible, has reduced the anterior open bite and created a posterior open bite of 4 mm for the supraeruption of teeth. CONCLUSION: BSSO with CCW rotation of mandible with a posterior open bite has conservatively involved in single-jaw surgery, thereby improving the facial esthetics of all the patients taken this study. CLINICAL SIGNIFICANCE: This innovative method of CCW rotation of mandible with open bite mainly prevents the bi-jaw surgery, improves the stability, and gives an esthetically good appearance.

Critical evaluation of incidence and prevalence of white spot lesions during fixed orthodontic appliance treatment: A meta-analysis.

OBJECTIVE: Development of dental caries, specifically, white spot lesions (WSLs), continues to be a well-recognized and troubling side effect of orthodontic fixed appliance therapy, despite vast improvement in preventive dental techniques and procedures. The aim of this meta-analysis is to evaluate, determine, and summarize the incidence and prevalence rates of WSLs during orthodontic treatment that have been published in the literature. MATERIALS AND METHODS: According to predetermined criteria, databases were searched for appropriate studies. References of the selected articles and relevant reviews were searched for any missed publications. RESULTS: In the 14 studies evaluated for WSLs, the incidence of new carious lesions formed during orthodontic treatment in patients was 45.8% and the prevalence of lesions in patients undergoing orthodontic treatment was 68.4%. CONCLUSION: The incidence and prevalence rates of WSLs in patients undergoing orthodontic treatment are quite high and significant. This widespread problem of WSL development is an alarming challenge and warrants significant attention from both patients and providers, which should result in greatly increased emphasis on effective caries prevention.