Dental Press Journal of Orthodontics最新文献

{"title":"Comparative evaluation of displacement and stress distribution pattern during mandibular arch distalization with extra and inter-radicular mini-implants: a three-dimensional finite element study.","authors":"Amit Maheshwari,&nbsp;Dhruv Nilesh Chawda,&nbsp;Ashish Kushwah,&nbsp;Rajesh Kumar Agarwal,&nbsp;Amesh Kr Golwara,&nbsp;Prateek Bhushan Dixit","doi":"10.1590/2177-6709.28.2.e2321373.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.28.2.e2321373.oar","url":null,"abstract":"<p><strong>Objective: </strong>To compare the initial stress distribution and displacement on mandibular dentition using extra and inter-radicular mini-implants for arch distalization, by means of finite element analysis.</p><p><strong>Methods: </strong>For this study, two finite element models of the mandible were designed. The models consisted of periodontal ligament (PDL) and alveolar bone of all teeth until second molars. In the Case 1, bilateral extra-radicular buccal-shelf stainless steel mini-implants (10.0-mm length; 2.0-mm diameter) were placed between first and second permanent molars. In the Case 2, bilateral inter-radicular stainless steel mini-implants (10.0-mm length; 1.5-mm diameter) were placed between second premolar and first permanent molar. Power hook was attached between canine and first premolar at a fixed height of 8mm. In the two cases, 200g of distalization force was applied. ANSYS v. 12.1 software was used to analyze and compare von Mises stress and displacement in the mandibular dentition, PDL and bone.</p><p><strong>Results: </strong>Higher stresses were observed in mandibular dentition with the inter-radicular implant system. The amount of von Mises stress was higher for cortical bone (85.66MPa) and cancellous bone (3.64MPa) in Case 2, in comparison to cortical bone (41.93MPa) and cancellous bone (3.43MPa) in Case 1. The amount of arch distalization was higher for mandible in Case 1 (0.028mm), in comparison to Case 2 (0.026mm).</p><p><strong>Conclusion: </strong>Both systems were clinically safe, but extra-radicular implants showed more effective and controlled distalization pattern, in comparison to inter-radicular implants, in Class III malocclusion treatment.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"28 2","pages":"e2321373"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10229115/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9614722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Psychological and financial impact of the COVID-19 pandemic during the first stages of the pandemic: Brazilian orthodontists´ perspective.","authors":"Ludmila Mangialardo Lima,&nbsp;Aron Aliaga-Del Castillo,&nbsp;Camila Massaro,&nbsp;Caroline Martins Gambardela,&nbsp;Deborah Brindeiro de Araújo Brito,&nbsp;Felicia Miranda,&nbsp;Lorena Vilanova,&nbsp;Paula Cotrin,&nbsp;Raquel Silva Poletto,&nbsp;Wilana Moura,&nbsp;Arnaldo Pinzan,&nbsp;Guilherme Janson,&nbsp;Fabiola Alvarez Avila","doi":"10.1590/2177-6709.27.6.e2221219.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.27.6.e2221219.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Brazil faced a catastrophic situation in the coronavirus pandemic. Due to the high risk of contamination and spread of COVID-19, dentist have been attending only urgency and emergency services in Brazil at the beginning of the pandemic.</p><p><strong>Objective: </strong>This research aimed to evaluate the psychological and financial impacts caused by the coronavirus pandemic in Brazilian orthodontists.</p><p><strong>Methods: </strong>This population-based cross-sectional study collected demographic data and mental health measurements from 404 orthodontists. Depression, anxiety, insomnia, and distress were evaluated through Brazilian versions of the 9-item Patient Health Questionnaire (9-PHQ), the 7-item Generalized Anxiety Disorder scale and Mini-Tracking (GAD), the 7-item Insomnia Severity Index (ISI), and the 22-item Impact of Event Scale-Revised (IES-R), respectively. The demographic data of the sample was described using descriptive statistics. The data was analyzed according to sex, professional status, and economic income. Comparisons were performed using Chi-square tests, Mann-Whitney U tests, and Kruskal-Wallis followed by post-hoc tests.</p><p><strong>Results: </strong>Females, graduate students, and lower incomes subgroups showed higher levels of depression, anxiety, insomnia, and distress. Most orthodontists showed moderate to extreme financial and professional concerns during the pandemic.</p><p><strong>Conclusion: </strong>The coronavirus pandemic negatively affected the psychological health and increased the financial concerns of the Brazilian orthodontists, mainly female, graduate students, and with income below 10k participants.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"27 6","pages":"e2221219"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10042464/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9239585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Normal occlusion in maturational life process.","authors":"Daniela Garib,&nbsp;Felicia Miranda,&nbsp;Camila Massaro","doi":"10.1590/2177-6709.27.6.e22spe6","DOIUrl":"https://doi.org/10.1590/2177-6709.27.6.e22spe6","url":null,"abstract":"<p><strong>Introduction: </strong>An increase in life expectancy was observed in the past years. Consequently, the knowledge of the maturational changes in the occlusion is highly important to guide clinicians during treatment planning.</p><p><strong>Objective: </strong>In this article, the occlusal and facial aging changes occurred during almost 50 years of follow-up are described. A normal occlusion sample from Bauru Dental School, University of São Paulo, Brazil, was evaluated at 13 (T1), 17 (T2) and 60 (T3) years of age. The maturational changes observed in digital dental models and cephalometric radiographs were presented. A revision of the aging process, under the gerontology and psychology perspectives, was also explored.</p><p><strong>Discussion: </strong>Maturational changes in non-treated individuals were very delicate. Mandibular crowding, decrease in the overbite, changes in the maxillary second molar position, increase in the clinical crown length, dental wear and discoloration were observed.</p><p><strong>Conclusion: </strong>Compared to the remarkable facial and skin changes during aging, the occlusion seems to be the most stable feature of the face during the aging process.</p><p><strong>Final considerations: </strong>An adequate oral care throughout lifetime makes the smile the best memory of youth at mature ages.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"27 6","pages":"e22spe6"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10727466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoding Deep Learning applications for diagnosis and treatment planning.","authors":"Jean-Marc Retrouvey,&nbsp;Richard Scott Conley","doi":"10.1590/2177-6709.27.5.e22spe5","DOIUrl":"https://doi.org/10.1590/2177-6709.27.5.e22spe5","url":null,"abstract":"<p><strong>Introduction: </strong>Artificial Intelligence (AI), Machine Learning and Deep Learning are playing an increasingly significant role in the medical field in the 21st century. These recent technologies are based on the concept of creating machines that have the potential to function as a human brain. It necessitates the gathering of large quantity of data to be processed. Once processed with AI machines, these data have the potential to streamline and improve the capabilities of the medical field in diagnosis and treatment planning, as well as in the prediction and recognition of diseases. These concepts are new to Orthodontics and are currently limited to image processing and pattern recognition.</p><p><strong>Objective: </strong>This article exposes and describes the different methods by which orthodontics may benefit from a more widespread adoption of these technologies.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"27 5","pages":"e22spe5"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9829109/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10578146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D reconstruction of lower anterior teeth from CBCT images: automatic segmentation with manual refinements.","authors":"Gaston Federico Coutsiers Morell,&nbsp;Kevin Chen,&nbsp;Carlos Flores-Mir","doi":"10.1590/2177-6709.28.3.e232249.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.28.3.e232249.oar","url":null,"abstract":"<p><strong>Objective: </strong>To develop a well-detailed and reproducible tooth segmentation method, when quantifying tooth volumetric measurements is needed.</p><p><strong>Material and methods: </strong>This was an in vitro study in which lower incisors and canines of five patients were 3D reconstructed by means of an automatic segmentation with manual refinements process. All the images were obtained using a 0.3-mm voxel size CBCT imaging. The software utilized was the ITK-SNAP®. The primary outcomes were the intra-rater and inter-rater reliabilities and the respective measurement errors.</p><p><strong>Results: </strong>The intra-rater reliability was excellent, with a mean measurement error of 4.16%. The inter-rater reliability was good, with a mean measurement error of 7.11%. Accuracy assessment was not possible, as the assessed teeth were not extracted.</p><p><strong>Conclusions: </strong>Although the described method is reliable, tooth volumetric error measurements may become significant, depending on the assessed situation.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"28 3","pages":"e232249"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10353849/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9844022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Treatment effects and lip profile changes following premolars extraction treatment vs fixed functional treatment in Class II division 1 malocclusion: A randomized controlled clinical trial.","authors":"Gagan Deep Kochar,&nbsp;Sanjay Londhe,&nbsp;Sukhbir Singh Chopra,&nbsp;Sarvraj Kohli,&nbsp;Virinder Singh Kohli,&nbsp;Ashish Kamboj,&nbsp;Munish Verma","doi":"10.1590/2177-6709.28.2.e232140.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.28.2.e232140.oar","url":null,"abstract":"<p><strong>Objective: </strong>The objective of this two-arm parallel randomized controlled trial was to evaluate the treatment effects and lip profile changes in skeletal Class II patients subjected to premolars extraction treatment versus fixed functional treatment.</p><p><strong>Methods: </strong>Forty six subjects fulfilling inclusion criteria were randomly distributed into Group PE (mean age 13.03±1.78 years) and Group FF (mean age 12.80±1.67 years) (n=23 each). Group PE was managed by therapeutic extraction of maxillary first premolars and mandibular second premolars, followed by mini-implant-supported space closure; and Group FF, by fixed functional appliance therapy. Skeletal, dental, and soft-tissue changes were analyzed using pre and post-treatment lateral cephalograms. Data obtained from this open label study was subjected to blind statistical analysis.</p><p><strong>Results: </strong>Extraction treatment resulted in greater increase of nasolabial angle (NLA: 3.1 [95% CI 2.08, 4.19], p<0.001), significant improvement of upper lip (UL-E line: -2.91 [95% CI -3.54, -2.28], p<0.001, UL-S line: -2.50 [95% CI -2.76, -2.24], p<0.001, UL-SnPog': -2.32 [95% CI -2.90, -1.74], p<0.01) and lower lip position (LL-E line: -0.68 [95% CI -1.36, 0.00], p<0.01, LL-S line: -0.55 [95% CI -1.11, 0.02], p<0.01, and LL-SnPog': -0.64 [95% CI -1.20, -0.07], p<0.01), lip thickness (UL thickness: 2.27 [95% CI 1.79, 2.75], p<0.001; LL thickness: 0.41 [95% CI -0.16, 0.97], p<0.01), upper lip strain (UL strain: -2.68 [95% CI -3.32, -2.04], p<0.001) and soft tissue profile (N'-Sn-Pog': 2.68 [95% CI 1.87, 3.50], p<0.01). No significant difference was observed between the groups regarding skeletal changes in the maxilla and mandible, growth pattern, overjet, overbite, interincisal angle and soft tissue chin position (p>0.05). Premolar extraction treatment demonstrated significant intrusion-retraction of maxillary incisors, better maintenance of maxillary incisor inclination, and significant mandibular molar protraction; whereas functional treatment resulted in retrusive and intrusive effect on maxillary molars, marked proclination of mandibular anterior teeth, and significant extrusion of mandibular molars. Both treatment modalities had similar treatment duration. Implant failure was seen in 7.9% of cases, whereas failure of fixed functional appliance was observed in 9.09% of cases.</p><p><strong>Conclusions: </strong>Premolar extraction therapy is a better treatment modality, compared to fixed functional appliance therapy for Class II patients with moderate skeletal discrepancy, increased overjet, protruded maxillary incisors and protruded lips, as it produces better dentoalveolar response and permits greater improvement of the soft tissue profile and lip relationship.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"28 2","pages":"e232140"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10202449/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9892780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of dehydroepiandrosterone sulphate (DHEAS) and cortisol levels in saliva and their correlation to cervical vertebrae maturation method in males and females at different growth stages: a clinical study.","authors":"Nikita Dattatraya Gavate,&nbsp;Smitha Shetty,&nbsp;Rabindra S Nayak,&nbsp;Vinay K,&nbsp;Anjali Narayan,&nbsp;Chaitra K R","doi":"10.1590/2177-6709.28.4.e2322277.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.28.4.e2322277.oar","url":null,"abstract":"<p><strong>Objective: </strong>The aim of this in-vivo study was to assess the salivary dehydroepiandrosterone sulphate (DHEAS) and cortisol levels, and their correlation to the Cervical Vertebrae Maturation method (CVM) in males and females at pre-pubertal, pubertal and post-pubertal growth stages.</p><p><strong>Methods: </strong>48 patients (24 males, 24 females) who were to undergo routine orthodontic treatment were screened according to the inclusion and exclusion criteria. Then subjects were grouped according to CVM stages, using lateral cephalogram, in pre-pubertal, pubertal and post-pubertal groups. Unstimulated saliva from the selected subjects was collected. DHEAS and cortisol levels in the salivary samples were estimated by Enzyme-Linked Immunosorbent assay (ELISA). Then they were compared to Cervical Vertebrae Maturation Method stages. One-way ANOVA test followed by Tukey's post-hoc test was used to compare the salivary DHEAS and cortisol levels between different CVM stages in males and females. Independent Student t-test was used to compare the mean salivary DHEAS and cortisol levels between different males and females in each CVM stage.</p><p><strong>Result: </strong>There was a progressive increase in salivary DHEAS and cortisol concentration as skeletal maturation progressed from CVM stages 1 and 2, CVM stages 3 and 4, reaching the highest value at CVM stages 5 and 6. Their levels were higher in males than females.</p><p><strong>Conclusion: </strong>The salivary DHEAS and cortisol levels can be useful as a potential indicator of skeletal maturation, to aid in the assessment of pubertal status.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"28 4","pages":"e2322277"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452376/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10206612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cartesian three-dimensional method to quantify displacements between cone beam computed tomography models.","authors":"Caroline Pelagio Maués Casagrande,&nbsp;Marcus Vinicius Sena Casagrande,&nbsp;Andressa Otranto de Brito Teixeira,&nbsp;David Silveira Alencar,&nbsp;Bruno Santos de Barros Dias,&nbsp;Rhita Cristina Cunha Almeida,&nbsp;Cátia Abdo Quintão,&nbsp;Felipe Assis Ribeiro Carvalho","doi":"10.1590/2177-6709.27.5.e222199.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.27.5.e222199.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Research in Orthodontics and Oral Surgery has been relying on three-dimensional (3D) models to evaluate treatment results with displacement color map techniques, even though it has important limitations.</p><p><strong>Objectives: </strong>This study proposed a method of tracking translational movements of 3D objects to evaluate displacements in surfaces with no shape modification.</p><p><strong>Methods: </strong>Cone Beam Computed Tomography (CBCT) data of ten patients were imported to the Dolphin software. A hypothetical virtual surgical plan (randomly defined) was developed in the software and afterwards verified using the proposed method. All the procedures were carried out by two evaluators, in two different time-points, with a 15-day interval. ITK-Snap software was used to generate high quality STL models. Centroid points were automatically generated and their coordinates were compared to confirm if they represented the known displacements simulated. The paired t-test and the Bland-Altman plots were used, as well as the intraclass correlation coefficient.</p><p><strong>Results: </strong>Interexaminers and intra-examiner tests showed excellent reliability of the method, with mean displacement measurement error values under 0.1mm. The paired t-test did not show any statistically significant differences.</p><p><strong>Conclusion: </strong>The method showed excellent reliability to track the simulated translational displacements of bone segments.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"27 5","pages":"e222199"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9829105/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10578142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dentoalveolar changes observed after the use of customized bonded Shark-Tooth-Like Spurs (JAWs) in adult patients with anterior open bite.","authors":"Rungrawee Kraisiridej,&nbsp;Boonsiva Suzuki,&nbsp;Eduardo Yugo Suzuki","doi":"10.1590/2177-6709.27.5.e2220448.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.27.5.e2220448.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Tongue spurs have been successfully used for the early treatment of anterior open bite (AOB). However, according to our knowledge, their effectiveness in the treatment of adults has not been evaluated.</p><p><strong>Objectives: </strong>The purpose of the study was to assess the dentoalveolar changes observed after the use of customized bonded shark-tooth-like spurs (JAWs) in adults with AOB.</p><p><strong>Methods: </strong>Twenty-three adults (22.1±4.4 years) with AOB were selected for the treatment. JAWs made from compomer cement were bonded on the lingual surfaces of the maxillary and mandibular anterior teeth to correct tongue-thrusting. Lateral cephalograms and 3D digital models were obtained to evaluate dentoalveolar features observed before and at three time points after JAWs use. Paired t-test and repeated measure ANOVA tests were used to compare dentoalveolar changes, and Pearson's correlation was used to analyze the association of dentoalveolar changes and overbite changes. The significance level was set at p<0.05.</p><p><strong>Results: </strong>Significant 3D dentoalveolar changes were observed after the three months of treatment with JAWs. Improvement of overbite (1.0±0.6 mm) and overjet (0.2±0.3 mm), combined with a retroclination of maxillary (3.0±3.0°) and mandibular (2.2±2.7°) incisors, were observed (p<0.05). Moreover, a significant decrease in anterior dental arch width in both maxillary and mandibular arches (0.4±0.4 mm; 0.3±0.3 mm, respectively), and an increase of posterior maxillary (0.1±0.2 mm) dental arch width were observed (p<0.05). These significant changes occurred in the first month after the JAWs use. A significant correlation was found between the initial arch length discrepancy and the amount of overbite correction (r=0.456, p<0.05).</p><p><strong>Conclusions: </strong>Dentoalveolar changes occurred after the first-month therapy with JAWs. The retroclination of the anterior teeth combined with the expansion of posterior teeth suggests a posterosuperior change in the tongue position. These changes were beneficial for the treatment of AOB in adult patients.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"27 5","pages":"e2220448"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9829107/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10578145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of multistranded wire and fiber-reinforced composite retainers effects on periodontium: A randomized clinical trial.","authors":"Nasreen Iqbal Nagani,&nbsp;Imtiaz Ahmed","doi":"10.1590/2177-6709.28.1.e2319380.oar","DOIUrl":"https://doi.org/10.1590/2177-6709.28.1.e2319380.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Fixed orthodontic retainers are very important for treatment stability; however, adverse effects on the health of periodontium can be caused as a result of deposition of plaque and calculus.</p><p><strong>Objectives: </strong>To compare and determine the effects of two mandibular fixed lingual retainers on the periodontal status, and to test the null hypothesis that there would be no significant difference on the periodontium health between the patients using fiber-reinforced composite (FRC) or multistranded wire (MSW) fixed retainers.</p><p><strong>Methods: </strong>A total of 60 subjects were recruited, out of which 6 were excluded and 2 dropped out during the study. Hence, 52 subjects with mean age of 21.5 ± 3.6 years were included in the study. The sample was composed by 8 males (15.4%) and 44 females (84.6%). The participants were randomly divided into two groups: Group 1 received fiber-reinforced composite retainer, while Group 2 received multistranded wire retainer. After insertion, plaque index, calculus index, gingival index and bleeding on probing were compared, after three months (T1), six months (T2), nine months (T3) and twelve months (T4), using Mann-Whitney test with p-value ≤ 0.05 as significant.</p><p><strong>Results: </strong>It could be seen that the health of periodontium deteriorated with the passage of time from T1 to T4 in both group of retainers. However, no statistically significant differences were found between the two groups (p> 0.05).</p><p><strong>Conclusion: </strong>The results of the study indicate that there was no significant difference on the health of periodontium between the patients with FRC and MSW fixed retainers, hence, the null hypothesis was accepted.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"28 1","pages":"e2319380"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10069746/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9250439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}