Journal of Orthodontics最新文献

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Effect of verbal and written information on the perception of pain and analgesic consumption, in adolescent orthodontic patients: A randomised controlled trial. 口头和书面信息对青少年正畸患者疼痛感和镇痛药用量的影响:随机对照试验。
IF 1.4
Journal of Orthodontics Pub Date : 2024-07-27 DOI: 10.1177/14653125241264295
Andrej Pavlić, Tadeja Blagec, Senka Meštrović
{"title":"Effect of verbal and written information on the perception of pain and analgesic consumption, in adolescent orthodontic patients: A randomised controlled trial.","authors":"Andrej Pavlić, Tadeja Blagec, Senka Meštrović","doi":"10.1177/14653125241264295","DOIUrl":"https://doi.org/10.1177/14653125241264295","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the impact of written instructions, about post-bonding pain, on patients' pain perception and analgesic consumption and to evaluate the correlation of pain with personality types.</p><p><strong>Design: </strong>Two-arm parallel randomised controlled trial.</p><p><strong>Setting: </strong>University Hospital Centre Zagreb, Zagreb, Croatia.</p><p><strong>Methods: </strong>Participants included adolescents in the permanent dentition with mild or moderate crowding.</p><p><strong>Randomisation: </strong>The participants were randomly allocated, using computer-generated random list, into two groups.</p><p><strong>Interventions: </strong>After bonding and archwire insertion, all participants received oral instructions on potential pain occurrence and pain control. Participants in the study group also received written information on post-bonding pain.</p><p><strong>Outcomes: </strong>Pain intensity was evaluated using the Numerical Rating Scale immediately after (T0), 2 days (T1) and 7 days (T2) after the placement of the fixed orthodontic appliance. Analgesic consumption was assessed as yes or no, and personality traits were assessed using the Big Five Inventory. Operators who scored pain intensity and recorded analgesic consumption and personality traits were blinded to the group allocation. Statistical analyses included the <i>t</i>-test, Mann-Whitney U-test, Spearman correlations and stepwise regression analysis.</p><p><strong>Results: </strong>The highest rate of pain was recorded at T1 (<i>P</i> < 0.001). No statistically significant difference in pain perception between groups was observed. There was no statistically significant difference in analgesic consumption between the two groups (<i>P</i> = 0.81). The correlations between personality traits and pain perception were not significant.</p><p><strong>Conclusion: </strong>The additional written information had little impact on pain perception, and it had no relationship to personality types. The perception of pain and analgesic consumption were not affected by the provision of additional written information (<i>P</i> = 0.81). Participants' personality types did not affect the impact of the information given.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241264295"},"PeriodicalIF":1.4,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141788422","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}
引用次数: 0
Position and root resorption of the incisors following anterior segment retraction using friction versus frictionless mechanics: A randomised controlled trial. 使用摩擦力学与无摩擦力学进行前段牵引后切牙的位置和牙根吸收:随机对照试验
IF 1.4
Journal of Orthodontics Pub Date : 2024-07-25 DOI: 10.1177/14653125241261402
Dorra Mhd Izzat Bakhit, Monica Guirguis Youssif Tawfik, Heba Mohamed Dehis, Yehya A Mostafa, Fouad A El Sharaby
{"title":"Position and root resorption of the incisors following anterior segment retraction using friction versus frictionless mechanics: A randomised controlled trial.","authors":"Dorra Mhd Izzat Bakhit, Monica Guirguis Youssif Tawfik, Heba Mohamed Dehis, Yehya A Mostafa, Fouad A El Sharaby","doi":"10.1177/14653125241261402","DOIUrl":"https://doi.org/10.1177/14653125241261402","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate the three-dimensional position and root resorption of incisors after anterior segment retraction (ASR) using friction versus frictionless mechanics.</p><p><strong>Participants and methods: </strong>Thirty female patients (13-18 years) with bimaxillary protrusion were randomly allocated into two groups. In the intervention group, ASR was undertaken using an elastomeric chain rendering 160 g/side extending between mini-screw implant and a hook crimped on 0.017 × 0.025-inch stainless-steel wire distal to the lateral incisor. In the comparison group, ASR was undertaken using closing T-loops fabricated from 0.017 × 0.025-inch titanium molybdenum alloy (TMA) wire rendering comparable retraction force. In both groups, the canine brackets were ligated after retraction to the mini-screw implants that were inserted in both the upper and lower arches bilaterally. The primary outcome was the three-dimensional changes in the position of the incisors. The secondary outcome was root resorption. These were measured from cone-beam computed tomography scans.</p><p><strong>Results: </strong>Statistically significant decreases in the upper (UI) and lower incisors (LI) crown torque were seen in both groups; however, the difference between groups was not statistically or clinically significant (UI MD -2.04°; 95% confidence interval [CI] = -8.02-3.95; LI MD -0.49°; 95% CI = -7.06-6.08). Significant tipping of upper (MD -1.17°; 95% CI = -2.06--0.27) and lower (MD -1.13°; 95% CI = -1.66--0.60) incisors was found in the friction, but not the frictionless group after retraction; however, the changes were not clinically significant. Significant lower incisor intrusion was found in both groups after retraction; however, the difference between groups was not statistically or clinically significant (MD -0.61°; 95% CI = -1.99-0.77). Statistically significant decreases in the UI and LI root length were seen in both groups. The difference between groups for UI changes was statistically significant (MD 0.54 mm; 95% CI = -0.02-1.07) but probably not clinically significant.</p><p><strong>Conclusion: </strong>Considering the limitations in the current study, there was no advantage of either mechanics over the other regarding the final position of incisors. The likelihood of root resorption should be considered when frictionless mechanics are used for retraction of incisors.</p><p><strong>Registry: </strong>Clinicaltrials.gov (NCT04878939).</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241261402"},"PeriodicalIF":1.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141759369","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}
引用次数: 0
Successful completion of orthodontic therapy in a patient with osteopetrosis: Case Report. 一名骨质增生患者成功完成正畸治疗:病例报告。
IF 1.4
Journal of Orthodontics Pub Date : 2024-07-25 DOI: 10.1177/14653125241264294
John K Brooks, Lillian M Height, Beverly A Jimenez, Anthony C Anyadike, Joseph G Kvint, Jeffery B Price
{"title":"Successful completion of orthodontic therapy in a patient with osteopetrosis: Case Report.","authors":"John K Brooks, Lillian M Height, Beverly A Jimenez, Anthony C Anyadike, Joseph G Kvint, Jeffery B Price","doi":"10.1177/14653125241264294","DOIUrl":"https://doi.org/10.1177/14653125241264294","url":null,"abstract":"<p><strong>Introduction: </strong>Orthodontic therapy in patients with osteopetrosis (OP) of the jaws has typically been contraindicated owing to the presence of poorly perfused and extremely compact bone, and the potential risk for infection and osteomyelitis. As such, completed orthodontic cases in association with OP have rarely been published.</p><p><strong>Patient concerns: </strong>A patient aged 14 years 6 months, with no known diagnosis of OP, sought orthodontic assessment for anterior crowding.</p><p><strong>Clinical findings: </strong>The patient exhibited a straight facial profile and increased mandibular facial height, competent lips, shallow mentolabial sulcus with mild mentalis strain, flat/reverse smile arc and wide buccal corridors on smiling.</p><p><strong>Primary diagnosis: </strong>The patient had a Class I incisor relationship on Class I skeletal bases with bilateral Class I molars and Class II canine relationships. This was complicated by a crossbite involving the lateral incisors and a Bolton discrepancy due to small maxillary lateral incisors. A radiologic assessment revealed polyostotic OP of the oromaxillofacial complex.</p><p><strong>Interventions: </strong>Treatment consisted of maxillary and mandibular fixed orthodontic therapy, bite turbos and elastics to level and align the dentition. Extractions of permanent teeth were not needed.</p><p><strong>Outcomes: </strong>At the conclusion of treatment, there was a slight left Class II malocclusion, with incomplete intercuspation on the left side due to tooth size discrepancy, possibly attributed to inadequate elastics compliance and the presence of osteopetrotic bone. The treatment was completed in 3 years, 1 year longer than anticipated.</p><p><strong>Conclusion: </strong>This report represents the second published account of a patient with OP successfully managed with comprehensive orthodontic care and without osseous complications. Obtaining cephalometric measurements on OP-affected patients may be imprecise owing to the presence of extremely dense bone and difficulty to identify bony landmarks. To reduce osteopetrotic sequelae, attending clinicians should consider reduced exertional orthodontic forces and closely monitor patients for adverse alveolar events.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241264294"},"PeriodicalIF":1.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141759370","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}
引用次数: 0
Post-treatment stability, survival time and periodontal health associated with vacuum-formed, bonded and rapid prototype retainers: A prospective clinical study. 与真空成型、粘接和快速原型保持器相关的治疗后稳定性、存活时间和牙周健康:前瞻性临床研究。
IF 1.3
Journal of Orthodontics Pub Date : 2024-06-10 DOI: 10.1177/14653125241255702
Sureka Murugaiyan, Haritha Pottipalli Sathyanarayana, Digant Thakkar, Sridevi Padmanabhan
{"title":"Post-treatment stability, survival time and periodontal health associated with vacuum-formed, bonded and rapid prototype retainers: A prospective clinical study.","authors":"Sureka Murugaiyan, Haritha Pottipalli Sathyanarayana, Digant Thakkar, Sridevi Padmanabhan","doi":"10.1177/14653125241255702","DOIUrl":"https://doi.org/10.1177/14653125241255702","url":null,"abstract":"<p><strong>Background: </strong>New technologies have paved the way for newer fabrication techniques, such as rapid prototyping, which has gained popularity in the fabrication of several orthodontic appliances including retainers.</p><p><strong>Aim: </strong>To evaluate the stability, survival time and periodontal health associated with vacuum-formed retainers (VFRs), bonded retainers (BRs) and rapid prototype retainers (RPRs) over a period of 12 months in retention.</p><p><strong>Study design: </strong>Prospective clinical study.</p><p><strong>Methods: </strong>A total of 72 participants completing fixed orthodontic treatment were allocated to the following three groups by the investigators based upon their initial malocclusion, compliant and preferences: VFR; BR; and RPR. The primary outcome was Little's Irregularity Index (LII). Other stability parameters, including arch length (AL), inter-canine width (ICW) and inter-molar width (IMW), were also assessed immediately after debonding (T0) and 12 months (T2) after debonding. In addition, survival time, and calculus index and gingival index (GI) were assessed.</p><p><strong>Results: </strong>LII showed a significant difference (<i>P</i> = 0.00) between the groups and was increased in the VFR group (0.18 ± 0.22 mm) compared to the BR (0.03 ± 0.05 mm) and RPR (0.01 ± 0.03 mm) groups but was not clinically significant. The mean survival time of maxillary retainers was longest for the RPR group (220.63 days; 95% confidence interval [CI] = 194.1-247.16) but there was no significant difference between the three groups (<i>P</i> = 0.43). The mean survival time of mandibular retainers was higher and the same for the VFR and RPR groups (240 days; 95% CI = 240-240) and there was no significant difference between the three groups (<i>P</i> = 0.38). The calculus index score (<i>P</i> = 0.00) was statistically significant between the groups, with an increased score for the BR group (0.33 ± 0.27) compared to the VFR (0.07 ± 0.16) and RPR (0.13 ± 0.22) groups. Similarly, the GI score (<i>P</i> = 0.02) was statistically significant between the groups and was increased in the BR group (0.01 ± 0.19) compared to the VFR (-0.15 ± 0.18) and RPR (-0.06 ± 0.15) groups. The increase in calculus index and GI scores for the BR group were not clinically significant.</p><p><strong>Conclusion: </strong>There were no clinically significant differences between the three retainer groups in terms of stability, periodontal health and time to failure.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125241255702"},"PeriodicalIF":1.3,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141300810","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}
引用次数: 0
Accuracy of conventional versus cone-beam CT-synthesised lateral cephalograms for cephalometric analysis: A systematic review. 传统与锥形束 CT 合成头颅侧位片在头型测量分析中的准确性对比:系统综述。
IF 1.3
Journal of Orthodontics Pub Date : 2024-06-01 Epub Date: 2023-06-21 DOI: 10.1177/14653125231178038
Grace Raj, Mary Raj, Leonardo Saigo
{"title":"Accuracy of conventional versus cone-beam CT-synthesised lateral cephalograms for cephalometric analysis: A systematic review.","authors":"Grace Raj, Mary Raj, Leonardo Saigo","doi":"10.1177/14653125231178038","DOIUrl":"10.1177/14653125231178038","url":null,"abstract":"<p><strong>Objective: </strong>To assess the accuracy of cone-beam computed tomography (CBCT)-synthesised lateral cephalograms (CSLCs) compared with conventional lateral cephalograms for cephalometric analysis in human participants and skull models.</p><p><strong>Methods: </strong>The authors performed a search of PubMed, Scopus, Google Scholar and Embase databases on 4 October 2021. Included studies met the following criteria: published in English; compared conventional lateral cephalograms and CSLCs; assessed hard- and soft-tissue landmarks; and were performed on human or skull models. Data extraction from eligible studies was performed by two independent reviewers. The quality of evidence was assessed using the Joanna Briggs Institute (JBI) Critical Appraisal Checklist tool - diagnostic accuracy studies.</p><p><strong>Results: </strong>A total of 20 eligible articles were included in this systematic review. Of these 20 studies, 17 presented with a low risk of bias, while three were found to have a moderate risk of bias. Hard- and soft-tissue analyses were evaluated for each imaging modality. The findings reveal that CSLCs are accurate and comparable to conventional lateral cephalograms for cephalometric analysis and demonstrate good inter-observer reliability. Four studies reported a higher accuracy with CSLCs.</p><p><strong>Conclusion: </strong>Overall, the diagnostic accuracy and reproducibility of CSLCs were comparable to conventional lateral cephalograms in cephalometric analysis. It is justified that patients who have an existing CBCT scan do not need an additional lateral cephalogram, minimising unnecessary radiation exposure, expenses and time for the patient. Larger voxel sizes and low-dose CBCT protocols can be considered to minimise radiation exposure.</p><p><strong>Registration: </strong>This study was registered with PROSPERO (CRD42021282019).</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"160-176"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9672977","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}
引用次数: 0
Artificial intelligence for treatment planning and soft tissue outcome prediction of orthognathic treatment: A systematic review. 人工智能用于正颌治疗的治疗计划和软组织结果预测:系统综述。
IF 1.3
Journal of Orthodontics Pub Date : 2024-06-01 Epub Date: 2023-09-29 DOI: 10.1177/14653125231203743
Daisy Salazar, Paul Emile Rossouw, Fawad Javed, Dimitrios Michelogiannakis
{"title":"Artificial intelligence for treatment planning and soft tissue outcome prediction of orthognathic treatment: A systematic review.","authors":"Daisy Salazar, Paul Emile Rossouw, Fawad Javed, Dimitrios Michelogiannakis","doi":"10.1177/14653125231203743","DOIUrl":"10.1177/14653125231203743","url":null,"abstract":"<p><strong>Background: </strong>The accuracy of artificial intelligence (AI) in treatment planning and outcome prediction in orthognathic treatment (OGT) has not been systematically reviewed.</p><p><strong>Objectives: </strong>To determine the accuracy of AI in treatment planning and soft tissue outcome prediction in OGT.</p><p><strong>Design: </strong>Systematic review.</p><p><strong>Data sources: </strong>Unrestricted search of indexed databases and reference lists of included studies.</p><p><strong>Data selection: </strong>Clinical studies that addressed the focused question 'Is AI useful for treatment planning and soft tissue outcome prediction in OGT?' were included.</p><p><strong>Data extraction: </strong>Study screening, selection and data extraction were performed independently by two authors. The risk of bias (RoB) was assessed using the Cochrane Collaboration's RoB and ROBINS-I tools for randomised and non-randomised clinical studies, respectively.</p><p><strong>Data synthesis: </strong>Eight clinical studies (seven retrospective cohort studies and one randomised controlled study) were included. Four studies assessed the role of AI for treatment decision making; and four studies assessed the accuracy of AI in soft tissue outcome prediction after OGT. In four studies, the level of agreement between AI and non-AI decision making was found to be clinically acceptable (at least 90%). In four studies, it was shown that AI can be used for soft tissue outcome prediction after OGT; however, predictions were not clinically acceptable for the lip and chin areas. All studies had a low to moderate RoB.</p><p><strong>Limitations: </strong>Due to high methodological inconsistencies among the included studies, it was not possible to conduct a meta-analysis and reporting biases assessment.</p><p><strong>Conclusion: </strong>AI can be a useful aid to traditional treatment planning by facilitating clinical treatment decision making and providing a visualisation tool for soft tissue outcome prediction in OGT.</p><p><strong>Registration: </strong>PROSPERO CRD42022366864.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"107-119"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41125454","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}
引用次数: 0
Editorial. 社论
IF 1.3
Journal of Orthodontics Pub Date : 2024-06-01 DOI: 10.1177/14653125241248740
Jayne Harrison
{"title":"Editorial.","authors":"Jayne Harrison","doi":"10.1177/14653125241248740","DOIUrl":"10.1177/14653125241248740","url":null,"abstract":"","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":"51 2","pages":"103-105"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141175881","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}
引用次数: 0
Guest Editorial: Research: A top priority for BOS. 特邀社论:研究:BOS 的首要任务。
IF 1.3
Journal of Orthodontics Pub Date : 2024-06-01 DOI: 10.1177/14653125241256696
Peter Mossey
{"title":"Guest Editorial: Research: A top priority for BOS.","authors":"Peter Mossey","doi":"10.1177/14653125241256696","DOIUrl":"10.1177/14653125241256696","url":null,"abstract":"","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":"51 2","pages":"106"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141175885","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}
引用次数: 0
Three-dimensional comparison of continuous and segmented arch techniques in the traction of palatally impacted canines using a non-linear finite element analysis. 利用非线性有限元分析对连续和分段牙弓技术牵引腭侧撞击性犬齿进行三维比较。
IF 1.3
Journal of Orthodontics Pub Date : 2024-06-01 Epub Date: 2023-07-20 DOI: 10.1177/14653125231187422
Stephanie Bou Malhab, Richard Karam, Fouad Kaddah, Tony El Khoury, Nabil Ghosn, Elie Khoury, Adib Kassis, Joseph Ghoubril
{"title":"Three-dimensional comparison of continuous and segmented arch techniques in the traction of palatally impacted canines using a non-linear finite element analysis.","authors":"Stephanie Bou Malhab, Richard Karam, Fouad Kaddah, Tony El Khoury, Nabil Ghosn, Elie Khoury, Adib Kassis, Joseph Ghoubril","doi":"10.1177/14653125231187422","DOIUrl":"10.1177/14653125231187422","url":null,"abstract":"<p><strong>Objective: </strong>To compare the three-dimensional (3D) effects of canine traction on the maxillary teeth when using two different traction methods, the continuous and the segmented arch wire techniques; then to test whether adding a transpalatal arch (TPA) would affect their response to traction.</p><p><strong>Design: </strong>Finite element analysis.</p><p><strong>Methods: </strong>A cone-beam computed tomography (CBCT) scan of a patient with bilateral palatally impacted canines was chosen, from which a 3D model was derived and imported into ABAQUS. Two arch wires were modelled, a continuous round one and a segmented rectangular one. Four models were obtained by adding a TPA to both techniques. A 100° imposed rotation was then applied at the intersection between the vertical loop and the horizontal segment of each wire. Initial displacement of the maxillary tooth in the labio-lingual and in the vertical directions was measured. The absolute maximum principal stress of the periodontal ligament (PDL) was also assessed.</p><p><strong>Results: </strong>Traction using a continuous arch wire led to different movement patterns of all teeth, some of them were tipped in a labial direction while others were lingually tipped. Traction using a segmented arch wire resulted in a retroclination of the posterior teeth and a proclination of the anterior teeth with a high level of stress on the premolars' PDL. Adding the TPA only affected the displacement of the first molars. The right side showed a maximum displacement of the first premolar, while the left side showed it on the lateral. The total displacement on the right side was higher than the left side.</p><p><strong>Conclusion: </strong>The segmented technique caused a uniform displacement of all teeth while the continuous one showed a non-uniform displacement. The angulation and position of the vertical loop affected the displacement of the maxillary teeth. The addition of a TPA acted only on the first molars.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"192-201"},"PeriodicalIF":1.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10195840","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}
引用次数: 0
Evidence that ectopic upper third molars can result in upper second molar impactions: A case series. 异位上第三磨牙可导致上第二磨牙撞击的证据:病例系列。
IF 1.4
Journal of Orthodontics Pub Date : 2024-06-01 Epub Date: 2023-06-05 DOI: 10.1177/14653125231178039
Rachna Chawla, Prabjot Garcha, Alexandra Lyne, Zahra Sheriteh
{"title":"Evidence that ectopic upper third molars can result in upper second molar impactions: A case series.","authors":"Rachna Chawla, Prabjot Garcha, Alexandra Lyne, Zahra Sheriteh","doi":"10.1177/14653125231178039","DOIUrl":"10.1177/14653125231178039","url":null,"abstract":"<p><strong>Introduction: </strong>The aim of these four case reports was to illustrate the presence of potential upper second molar impactions associated with ectopic third molars and to highlight that some cases have an atypical radiographic presentation.</p><p><strong>Case presentations: </strong>Four patients (age range = 7-12 years) with various malocclusions presented to the paediatric and orthodontic departments for treatment to address their presenting complaints. Incidental radiographic findings demonstrated potentially impacted upper second molars associated with ectopic third molars. In all of these cases, a joint paediatric-orthodontic approach was adopted to address their dental health, prevent upper second molar impaction and to treat their malocclusion.</p><p><strong>Discussion: </strong>Careful and systematic review of radiographic imaging was necessary in order to diagnose these cases correctly. These cases demonstrated that it was not always simple to determine impactions, particularly as identification of third molar crypts can be difficult. On occasion, sequential radiographic monitoring is advocated, particularly in patients in the mixed dentition; however, clinicians must be mindful of the risks of ionising radiation as it is not routine practice to irradiate a patient multiple times.</p><p><strong>Conclusion: </strong>The series of cases highlights the need for a systematic assessment of OPTs to identify ectopic upper third molars. The input from radiologists is invaluable and if necessary, supplemental three-dimensional cone-beam computed tomography can be performed.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"177-182"},"PeriodicalIF":1.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9583218","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}
引用次数: 0
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