Journal of Orthodontics最新文献

{"title":"Awareness and usage of mobile applications as an orthodontic diagnostic tool among Croatian orthodontic clinicians.","authors":"Matea Markusi, Tadeja Blagec, Luka Šimunović, Marina Lapter Varga, Senka Meštrović","doi":"10.1177/14653125231217307","DOIUrl":"10.1177/14653125231217307","url":null,"abstract":"<p><strong>Objective: </strong>To assess the impact of gender and orthodontic qualification length on the awareness, knowledge and usage of orthodontic diagnostic mobile applications, non-diagnostic mobile applications and social media platforms among orthodontic clinicians.</p><p><strong>Design: </strong>Cross-sectional questionnaire-based study.</p><p><strong>Setting: </strong>The Republic of Croatia.</p><p><strong>Participants: </strong>A total of 92 orthodontic specialists, members of the Croatian Dental Chamber.</p><p><strong>Methods: </strong>This study was conducted using a questionnaire distributed via email to orthodontic clinicians between May and July 2022.</p><p><strong>Results: </strong>In total, 92 respondents were divided into groups according to sex and median orthodontic qualification length: more recently qualified (MRQ) with ⩽12 years; and longer qualified (LQ) with >12 years. Nearly one-third of respondents did not have any prior knowledge of mobile applications used as an orthodontic diagnostic tool. MRQ respondents were more interested in using mobile apps as opposed to computer software for digital analysis (<i>P</i> < 0.05). This interest was in a negative correlation with orthodontic qualification length (<i>P</i> < 0.01) and was more prevalent among female respondents (<i>P</i> < 0.001). About one-third (32.6%) of respondents did not use non-diagnostic mobile applications and 44.6% did not use social media platforms. Nearly two-thirds (62%) of the respondents did not promote their work through social media. Male respondents and LQ promoted their work more frequently than others (<i>P</i> < 0.05). The usage of other mobile applications was in a positive correlation with the knowledge and awareness of orthodontic mobile applications (<i>P</i> < 0.05).</p><p><strong>Conclusion: </strong>Orthodontic clinicians lacked knowledge, awareness and the usage of orthodontic diagnostic mobile applications according to sex and orthodontic qualification length. One-third used non-diagnostic mobile applications and less than half used social platforms in daily clinical work.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"130-136"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139048869","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":"The effect of text message reminders on compliance with Twin Block appliances: A randomised controlled trial.","authors":"Emily Higgins, Thérèse Garvey, Angus Burns","doi":"10.1177/14653125231188378","DOIUrl":"10.1177/14653125231188378","url":null,"abstract":"<p><strong>Aims: </strong>The aim of this study was to evaluate whether text reminders influence patient compliance with Twin Block appliances. The null hypothesis was that there was no statistically significant differences in Twin Block compliance between those who receive text reminders and those that do not.</p><p><strong>Design: </strong>Single-blind parallel randomised controlled clinical trial.</p><p><strong>Setting: </strong>Health Service Executive (HSE) orthodontic outpatient clinic in Dublin, Ireland.</p><p><strong>Participants: </strong>A total of 59 patients aged 11-15 years with a 5a Index of Orthodontic Treatment Need (IOTN grade) starting treatment with Twin Block appliances.</p><p><strong>Methods: </strong>A computer-generated unstratified allocation sequence was used to randomise the participants into the control group (CG) or the text group (TG). Both groups were asked to wear their appliances full-time. In addition to the same verbal and written instruction received by the CG, the TG received text message reminders, every 3 days, to wear their appliances. The primary outcome measure was wear time reported by Theramon^® sensors embedded in the appliances. Data on wear time were uploaded from the Theramon^® sensors onto cloud software. Participants in both groups were asked to fill out wear diaries and submit these at each visit. Treating clinicians and the primary investigator were blinded to the allocation group. Participants were followed up for 4 months. Participants were not blinded to their treatment group.</p><p><strong>Results: </strong>In total, 29 participants were allocated to the CG and 30 to the TG. The data for 53 participants were analysed, 24 from the CG and 29 from the TG. The median hours/day of wear recorded using the Theramon^® sensors was 13.77 (interquartile range [IQR] = 10.19) for the CG and 17.72 (IQR = 5.62) for the TG. The difference in wear time recorded was not statistically significant (<i>P</i> = 0.16).</p><p><strong>Conclusion: </strong>The study concluded that text message reminders had no statistically significant influence on patient compliance with Twin Block appliances.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"202-210"},"PeriodicalIF":1.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11141082/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9922967","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":"Survey of National Health Service (NHS) orthodontic practitioners in Wales, UK. Part 1: working patterns 2021-2022.","authors":"Benjamin Rk Lewis, Olivia J Spicer, William S McLaughlin, Kirstie Moons","doi":"10.1177/14653125231224459","DOIUrl":"10.1177/14653125231224459","url":null,"abstract":"<p><strong>Objective: </strong>To ascertain the working patterns of the NHS orthodontic workforce in Wales and any possible future changes.</p><p><strong>Design: </strong>Descriptive cross-sectional survey.</p><p><strong>Participants: </strong>NHS orthodontic practitioners in Wales.</p><p><strong>Methods: </strong>An anonymised email distributed an electronic two-part survey of the Welsh NHS orthodontic workforce. The survey consisted of three sections: (1) demographic information; (2) respondents' working pattern (part 1); and (3) perceptions of professional satisfaction (part 2).</p><p><strong>Results: </strong>Part 1 of the survey yielded a 70.5% response rate (n = 79); 65.8% of the respondents were women. Of the respondents, 45.6% (n = 36) worked full time (F/T), 39.2% (n = 31) worked less than F/T and 15.2% (n = 12) worked more than F/T. Of the male respondents, 81.5% (n = 22) worked 10 sessions or more compared to 50% (n = 26) of women. The respondents undertook 508.5 orthodontic clinical sessions per week within Wales; of these sessions, 87.6% (n = 445.5) delivered NHS orthodontic care. Of the respondents, 8.4% (n = 7) were planning to increase their orthodontic clinical time within the next 2 years, 24.1% (n = 19) were planning to decrease it and 20.3% (n = 16) were unsure. One-quarter of respondents indicated that they were planning to stop clinical orthodontic activity within the next 5 years, including 53.3% (n = 8) of DwSIs, 37% (n = 10) of primary care specialists and 13.3% (n = 2) of consultants. The pandemic was an influencing factor for 80% of these clinicians.</p><p><strong>Conclusions: </strong>Part 1 of the survey suggested that the majority of the orthodontic workforce was female, were working full time or more, and spent most sessions delivering NHS care. One-quarter of respondents were planning to cease undertaking orthodontic activity within the next 5 years.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"137-146"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139569686","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":"Class III malocclusion treated with a 3D-printed hybrid hyrax distalizer combined with mentoplate using Alt-RAMEC protocol: A case report.","authors":"Sarah Joda Kathem, Rannvá Caroline Matras, Salaheddin Omar Mahmoud Abbas","doi":"10.1177/14653125231184910","DOIUrl":"10.1177/14653125231184910","url":null,"abstract":"<p><strong>Introduction: </strong>The aim of this report was to assess the skeletal, dental and soft tissue changes in a juvenile patient with a severe class III malocclusion. This case report describes a novel method of class III treatment using skeletal anchorage for maxillary protraction and Alt-RAMEC protocol.</p><p><strong>Patient concerns: </strong>The patient did not have any subjective complaints before treatment and there was no family history of class III malocclusion.</p><p><strong>Clinical findings and primary diagnoses: </strong>Extra-orally, the patient had a concave profile with a retrusive mid-face and prominent lower lip. The intra-oral examination revealed angle class III malocclusion with a -3-mm overjet. There was no anterior displacement on closure when the patient was assessed clinically. According to the cephalometric analysis, the sagittal jaw relation and Wits appraisal were reduced due to a retrognathic maxilla and prognathic mandible.</p><p><strong>Interventions: </strong>The treatment plan involved maxillary protraction, Alt-RAMEC protocol for 10 weeks and upper molar distalisation with a hybrid hyrax distalizer in combination with a mentoplate. The active treatment time was estimated to 18 months followed by 6 months retention with the appliance.</p><p><strong>Outcomes: </strong>The sagittal jaw relationship was increased by approximately 9°, mainly due to maxillary advancement of 8 mm and a positional change of the mandible anteroposteriorly. Natural decompensation of the lower incisors was also observed. In addition, both the facial profile and the smile became more harmonious after treatment. The treatment analysis revealed that the changes achieved were mainly skeletal and it was possible to avoid adverse effects on the dentition.</p><p><strong>Conclusion: </strong>In conclusion, treatment with a hybrid hyrax distalizer combined with mentoplate using the Alt-RAMEC protocol is effective in correcting the anteroposterior discrepancy in a juvenile class III patient and it is possible to achieve maxillary advancement of 8 mm.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"183-191"},"PeriodicalIF":1.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9727697","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":"Survey of National Health Service (NHS) orthodontic practitioners in Wales, UK. Part 2: job satisfaction perceptions of the workforce 2021-2022.","authors":"Benjamin Rk Lewis, Olivia J Spicer, Kirstie Moons, William S McLaughlin","doi":"10.1177/14653125231224452","DOIUrl":"10.1177/14653125231224452","url":null,"abstract":"<p><strong>Objective: </strong>To ascertain the perceptions of the Welsh NHS orthodontic workforce regarding their job satisfaction and work life balance.</p><p><strong>Design: </strong>Descriptive cross-sectional survey.</p><p><strong>Participants and setting: </strong>Clinicians providing NHS orthodontic treatment in Wales.</p><p><strong>Methods: </strong>An anonymised, email-distributed, electronic, two-part survey (onlinesurveys.ac.uk) of the Welsh NHS orthodontic workforce working within Wales was undertaken. The survey consisted of three sections: (1) demographic information (part 1); (2) respondents' working pattern (part 1); and (3) perceptions of professional job satisfaction and work/life balance (part 2). The responses received were exported into an Excel spreadsheet for descriptive analysis. The free-text comments were collated for each question and subsequently underwent a content analysis to identify any common themes.</p><p><strong>Results: </strong>Part 2 of the survey yielded an overall response rate of 69.6% (n = 78). Over 96% (n = 75) of respondents felt that they had 'made the right career choice, including 100% of orthodontic trainees, orthodontic specialists and orthodontic consultants. Of the respondents, 88.5% (n = 69) said they 'enjoyed going to work', with the remaining being mostly neutral in their opinion. Of the respondents, 79.5% (n = 62) felt they were able to 'provide their patients the optimum care' and 64.1% (n = 50) felt that more demands were being placed upon them by patients and parents. Overall, 52.6% (n = 41) of survey respondents believed it was becoming increasingly difficult to achieve an effective work/life balance, and this was more prevalent among male respondents (61.5%, n = 16) than female respondents (48.1%, n = 25), although this difference was not statistically significant (<i>P</i> >0.05).</p><p><strong>Conclusions: </strong>Over 96% of respondents felt they have chosen the right career and that flexibility and a good working environment are important to job satisfaction. Respondents felt that there are increasing demands being placed upon them by patients/parents, employers, the Regulators, the Government and Health Boards. This is leading to increased difficulty in achieving a satisfactory work/life balance, especially among male respondents.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"147-159"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139569812","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":"Clear aligner therapy practice among orthodontists in the United Kingdom and the Republic of Ireland: A cross-sectional survey of the British Orthodontic Society membership.","authors":"Maurice J Meade, Tony Weir, Jadbinder Seehra, Padhraig S Fleming","doi":"10.1177/14653125231204889","DOIUrl":"10.1177/14653125231204889","url":null,"abstract":"<p><strong>Objective: </strong>To investigate clear aligner therapy (CAT) practice among orthodontists in the British Orthodontic Society (BOS).</p><p><strong>Design: </strong>A cross-sectional online survey.</p><p><strong>Methods: </strong>An electronic survey was distributed to members of the BOS in 2022. The survey comprised questions regarding respondent demographics, general use of CAT, the choice of proprietary CAT appliances, CAT planning, case selection, treatment protocols and orthodontist-reported CAT problems.</p><p><strong>Results: </strong>Overall, there were 233 (19.5%) respondants with the majority (n = 121, 53.1%) being female. Most respondents reported practising in England (n = 171, 74.7%). The majority (n = 177, 77.3%) indicated that they used CAT in their practice, with 48.1% (n = 81) treating 1-20 patients with CAT annually. The most frequently prescribed CAT system was Invisalign (n = 138, 81.2%). One to three changes to the initial digital treatment plan were made by 72.9% (n = 121) with final tooth positions being the most common reason for adjustment (64.4%). Most (n = 97, 60.3%) rarely or never performed premolar extractions with CAT. Of the respondents, 23 12.7%) reported that they always or mostly used a remote monitoring system in conjunction with CAT, with a wide range of aligner change protocols reported. The median number of months required to complete non-extraction CAT reported by the respondents was 12. Most respondents (n = 77, 51.7%) did not feel that CAT provides superior outcomes compared with fixed appliance therapy.</p><p><strong>Conclusion: </strong>CAT practice varied widely among the surveyed orthodontists. A predilection for the use of Invisalign and utility in less severe cases was noted.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"120-129"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11141077/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41203739","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":"Trismus caused by migration of orthodontic archwire into the infratemporal fossa: a case report.","authors":"Boon Hui Chan, Aik Wei Goh, Cheryl Lai Su-Hsyen","doi":"10.1177/14653125241254404","DOIUrl":"https://doi.org/10.1177/14653125241254404","url":null,"abstract":"<p><strong>Introduction: </strong>Soft tissue injuries are known complications of orthodontic treatment. Most of the injuries are mild, but severe complications can arise from deeper penetration or dislodgement of brackets and other foreign bodies into the surrounding tissues of the oropharynx and infratemporal fossa.</p><p><strong>Patient concerns: </strong>The patient, accompanied by his parents, presented to the Children's Emergency Department with the concern of gradual limitation of mouth opening and eventual trismus, which occurred over a span of 2 weeks.</p><p><strong>Clinical findings: </strong>The patient presented with trismus and slight discomfort at the left cheek region. He reported a history of gradual limitation to his mouth opening 2 weeks prior. He was wearing upper and lower fixed orthodontic appliances and the left distal end of the maxillary archwire was found to have migrated into the left infratemporal fossa.</p><p><strong>Primary diagnoses: </strong>Left medial pterygoid muscle inflammation, or bleeding and haematoma formation, or infection within the infratemporal region.</p><p><strong>Interventions: </strong>The maxillary archwire was removed in the Children's Emergency Department and a computed tomography (CT) scan performed subsequently confirmed the diagnosis of left medial pterygoid muscle inflammation. The patient was started on an intravenous (IV) antibiotic and a 2-day course of IV dexamethasone to reduce the muscle inflammation.</p><p><strong>Outcome: </strong>By the second day, the patient was able to achieve a mouth opening of 6 mm, and by the second week, the mouth opening had returned to normal.</p><p><strong>Conclusion: </strong>The potential risk of soft tissue injury and complications from orthodontic treatment is generally mild and limited. Soft tissue injuries can be avoided with careful management by the operator with the proper precautions taken. Clinicians should be familiar with the surrounding soft tissue anatomy and be aware of the potential for more severe complications and provide management or referral to the appropriate specialty accordingly.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241254404"},"PeriodicalIF":1.3,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141086306","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":"Information-seeking behaviour in patients exploring orthognathic surgery: A qualitative study.","authors":"Nicola Wade, Ninu Paul, Nathan Nagar, Sarah Rolland, Sarah Germain","doi":"10.1177/14653125241249494","DOIUrl":"https://doi.org/10.1177/14653125241249494","url":null,"abstract":"<p><strong>Objective: </strong>To explore how orthognathic patients seek information during decision-making.</p><p><strong>Design: </strong>Qualitative, cross-sectional study.</p><p><strong>Setting: </strong>A hospital in Cumbria, UK.</p><p><strong>Participants: </strong>Prospective orthognathic patients.</p><p><strong>Methods: </strong>Participants were purposively recruited from joint orthognathic clinics after the original consultation. Semi-structured interviews were conducted via remote video call with nine participants aged 18-30 years. Data collection and reflexive thematic analysis occurred in parallel until thematic saturation was achieved.</p><p><strong>Results: </strong>The central finding of this research was that patients were making informed decisions about orthognathic surgery. Four themes were identified to support this central finding including the following: (1) selective engagement with orthognathic information sources; (2) the central role of patient-specific information from professionals and peers; (3) Internet use to supplement standard information resources; and (4) concerns over information found online. The preferred source of information was verbal from the clinical team as it was trusted and person-specific. Past patients were identified as valued sources of information and establishing contact through digital social media networks was found to be a convenient alternative to face-to-face. Online information found was valued but concerns included information overload, problems establishing applicability and concerns over its credibility.</p><p><strong>Conclusion: </strong>Orthognathic patients were making informed decisions about their treatment. This study highlights the central role of the patient-clinician interaction in decision-making, especially in providing patient-specific information. Insight into the nuances of information-seeking behaviours will better inform clinical care. Since patients frequently access online information that is decision-relevant, encouraging patients to discuss online searches will support the shared decision-making process and alleviate any concerns with information found. During consultation, explaining the purpose of an information aid rather than expecting patients to read them separately, may further enhance its usefulness in decision-making. This study identified an unmet need for visual aids, such as real-time images of postoperative recovery. These findings can inform the design of future information resources.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241249494"},"PeriodicalIF":1.3,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140876700","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":"Late-forming supernumerary teeth: A case series.","authors":"Aoibheann Wall, Rachna Chawla, Robert Sd Smyth, Fiona S Ryan","doi":"10.1177/14653125241239057","DOIUrl":"https://doi.org/10.1177/14653125241239057","url":null,"abstract":"<p><p>The aim of this case series was to illustrate the development of late-forming supernumerary teeth (LFST) and highlight the implications for orthodontic treatment. There are limited studies relating to the aetiology, prevalence and treatment of LFST and the cases presented here demonstrate the management of LFST within a tertiary care centre. Five cases are presented, which show various presentations and chronological ages in the development of LFST. This case series emphasises the significance of maintaining a low threshold for suspecting LFST in patients where supernumerary teeth have previously been identified. It also highlights the importance of regular clinical and radiographic reviews. Timely identification can help prevent complications and optimise treatment outcomes.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241239057"},"PeriodicalIF":1.3,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140194020","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":"Comparative evaluation of the dentoalveolar effects of three Class II correctors: A finite element analysis study.","authors":"Sonia Patricia Plaza-Ruiz, Paula Alejandra Rojas-Plaza, Jessica Basto-Tacuma, Luz Andrea Velandia-Palacio, Liliana Jara-López","doi":"10.1177/14653125231195096","DOIUrl":"10.1177/14653125231195096","url":null,"abstract":"<p><strong>Objective: </strong>To compare the stress distribution and total strain applied to the dentition, periodontal ligament (PDL) and cortical and trabecular bones by three Class II correctors using finite element analysis.</p><p><strong>Design: </strong>Three-dimensional analysis of stresses and total strain of the dentition with three Class II correctors.</p><p><strong>Setting: </strong>Computational study.</p><p><strong>Methods: </strong>Three-dimensional finite element models of Class II elastics, the Forsus Fatigue Resistant Device (FRD) and the Carriere Motion Appliance (CMA) were constructed from a cone-beam computed tomography (CBTC) image of an orthodontic Class II patient. The distribution of stress (von Mises and principal stress) and the total strain (mm) in maxillo-mandibular dentition, PDL, cortical and trabecular bone were analysed.</p><p><strong>Results: </strong>The highest von Mises yield and the maximum principal stress in the three models were found at the teeth, followed by the cortical bone, trabecular bone and PDL. The maximum stress and total deformation were located at the upper canines and lower molars in the Class II elastics and CMA models, in the upper first molars in the Forsus FRD and CMA, and in the lower first premolars in the Forsus FRD. In addition, stress was distributed in the anterior and posterior regions of the teeth, and the total deformation was found in the distal direction in the upper arch and in the mesial direction in the lower arch.</p><p><strong>Conclusion: </strong>The stress concentrations in the three models were located close to the active components of each appliance, producing specific patterns of stress distribution and displacement that should be taken into account when planning the type of appliance to be used for the correction of the Class II malocclusion.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"41-52"},"PeriodicalIF":1.3,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10104301","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}