Low-level laser therapy (LLLT) has been widely implemented in the acceleration of orthodontic tooth movement (OTM). However, the impact of LLLT on the alveolar bone changes accompanying OTM has not been comprehensively addressed in a clinical trial. Hence, the objective of this investigation was to perform a three-dimensional (3D) assessment of the impact of LLLT on the changes in bone quality (bone density), and quantity (bone thickness and volume) during the canine retraction stage of orthodontic treatment. Twenty patients requiring maxillary first premolars’ extraction followed by canine retraction were recruited for this split-mouth study. Before the commencement of canine retraction, the maxillary arch in each of the enrolled subjects was randomly split into an “experimental” side, and a “control” side. In the experimental group, LLLT was performed on days 0, 3, 7, 14, and then every two weeks until the completion of the research duration (12 weeks). The employed diode laser was of 980 nanometers (nm) wavelength and a dosage of 8 joules per square centimeter (J/cm2), in a continuous mode. Canine distalization was accomplished using nickel-titanium closed-coil springs, with a force of 150 grams (g). Pre-retraction and post-retraction cone-beam computed tomography was performed to assess bone quality and quantity, in terms of alveolar bone density, thickness, and volume. A statistically significant reduction in bone density and volume was found following canine retraction (P < 0.05) with and without LLLT application. For the total bone thickness, a statistically significant decrease was observed at both the coronal and mid-root levels of the maxillary canine (P < 0.05), whereas an insignificant change was reported at the apical level (P > 0.05) in both the studied groups. Furthermore, insignificant differences were documented in all the measured outcomes between the experimental and the control groups (P > 0.05). With the employed parameters in the present study, LLLT does not positively influence the changes in neither bone quality (bone density) , nor bone quantity (bone thickness and volume) accompanying OTM. Moreover, a significant reduction in bone density, in bone thickness (coronal and mid-root levels), as well as in bone volume accompanies canine distalization in both groups.
{"title":"Cone-beam computed tomography assessment of bone quality and quantity following laser-assisted orthodontic tooth movement: A randomized controlled trial","authors":"F. Eid, R. Alansari","doi":"10.25259/apos_188_2023","DOIUrl":"https://doi.org/10.25259/apos_188_2023","url":null,"abstract":"\u0000\u0000Low-level laser therapy (LLLT) has been widely implemented in the acceleration of orthodontic tooth movement (OTM). However, the impact of LLLT on the alveolar bone changes accompanying OTM has not been comprehensively addressed in a clinical trial. Hence, the objective of this investigation was to perform a three-dimensional (3D) assessment of the impact of LLLT on the changes in bone quality (bone density), and quantity (bone thickness and volume) during the canine retraction stage of orthodontic treatment.\u0000\u0000\u0000\u0000Twenty patients requiring maxillary first premolars’ extraction followed by canine retraction were recruited for this split-mouth study. Before the commencement of canine retraction, the maxillary arch in each of the enrolled subjects was randomly split into an “experimental” side, and a “control” side. In the experimental group, LLLT was performed on days 0, 3, 7, 14, and then every two weeks until the completion of the research duration (12 weeks). The employed diode laser was of 980 nanometers (nm) wavelength and a dosage of 8 joules per square centimeter (J/cm2), in a continuous mode. Canine distalization was accomplished using nickel-titanium closed-coil springs, with a force of 150 grams (g). Pre-retraction and post-retraction cone-beam computed tomography was performed to assess bone quality and quantity, in terms of alveolar bone density, thickness, and volume.\u0000\u0000\u0000\u0000A statistically significant reduction in bone density and volume was found following canine retraction (P < 0.05) with and without LLLT application. For the total bone thickness, a statistically significant decrease was observed at both the coronal and mid-root levels of the maxillary canine (P < 0.05), whereas an insignificant change was reported at the apical level (P > 0.05) in both the studied groups. Furthermore, insignificant differences were documented in all the measured outcomes between the experimental and the control groups (P > 0.05).\u0000\u0000\u0000\u0000With the employed parameters in the present study, LLLT does not positively influence the changes in neither bone quality (bone density) , nor bone quantity (bone thickness and volume) accompanying OTM. Moreover, a significant reduction in bone density, in bone thickness (coronal and mid-root levels), as well as in bone volume accompanies canine distalization in both groups.\u0000","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"30 38","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139388667","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}
The objective of this study was to delve into predictors of adherence in adult orthodontic patients as stated by orthodontists in Saudi Arabia. Ninety-one orthodontists from Saudi Arabia completed a questionnaire in relation to the importance and frequency of use of predictors of adherence. In this cross-sectional quantitative and exploratory study, orthodontists were requested to rate the predictors of adherence on a five-point Likert scale. The questionnaire in this study was categorized into four sections such as (1) evaluation – their opinion on the importance of predictor in the assessment of patient adherence, (2) application – scope of use of each predictor in the assessment of adherence in the routine practice, (3) open-ended questions to amass information about other apparent predictors of adherence, and (4) demographics. Mixed and variable responses were obtained in terms of the importance and extent of application of predictors in assessing patient adherence. The survey revealed the most important predictors for adherence that included patient’s adherence to appointments and their cooperation in handling dental appliances, and maintenance of oral hygiene. However, in actual practice, orthodontists were frequently implementing factors such as the patient to keep appointments, the patient is observed to be involved in treatment, and the patient is observed to be enthusiastic about treatment. Through the open-ended questions, multiple factors were reported that need to be explored further. However, the remaining factors reported for adherence portrayed varied patterns. Predictors of adherence were reported with varying extent of consistency among orthodontists in Saudi Arabia. However, adherence to appointment, co-operation in handling of appliances, and oral hygiene emerged as the most significant factors by the orthodontists for adherence in cases of adult patients.
{"title":"Adherence in adult orthodontic settings: Understanding orthodontists’ predictors","authors":"N. A. Al Shammary, A. K. Alshammari","doi":"10.25259/apos_53_2023","DOIUrl":"https://doi.org/10.25259/apos_53_2023","url":null,"abstract":"The objective of this study was to delve into predictors of adherence in adult orthodontic patients as stated by orthodontists in Saudi Arabia. Ninety-one orthodontists from Saudi Arabia completed a questionnaire in relation to the importance and frequency of use of predictors of adherence. In this cross-sectional quantitative and exploratory study, orthodontists were requested to rate the predictors of adherence on a five-point Likert scale. The questionnaire in this study was categorized into four sections such as (1) evaluation – their opinion on the importance of predictor in the assessment of patient adherence, (2) application – scope of use of each predictor in the assessment of adherence in the routine practice, (3) open-ended questions to amass information about other apparent predictors of adherence, and (4) demographics. Mixed and variable responses were obtained in terms of the importance and extent of application of predictors in assessing patient adherence. The survey revealed the most important predictors for adherence that included patient’s adherence to appointments and their cooperation in handling dental appliances, and maintenance of oral hygiene. However, in actual practice, orthodontists were frequently implementing factors such as the patient to keep appointments, the patient is observed to be involved in treatment, and the patient is observed to be enthusiastic about treatment. Through the open-ended questions, multiple factors were reported that need to be explored further. However, the remaining factors reported for adherence portrayed varied patterns. Predictors of adherence were reported with varying extent of consistency among orthodontists in Saudi Arabia. However, adherence to appointment, co-operation in handling of appliances, and oral hygiene emerged as the most significant factors by the orthodontists for adherence in cases of adult patients.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139263744","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}
The nasoalveolar molding (NAM) appliance has been the appliance of choice for pre-surgical orthopedics to improve nasal and lip morphology, and optimally align the alveolar segments before cheiloplasty. However, the appliance has some limitations, including its complexity and long clinical chair time for appliance adjustments. In this case report, we present a patient treated for a right complete cleft lip and palate using three types of Korat modification for NAM with a 5-year follow-up. This study demonstrated that the Korat-NAM improved the aforementioned issues and was suitable for patients at different stages before and after lip and palate repair.
{"title":"The use of Korat-modified nasoalveolar molding devices in patients with unilateral complete cleft lip and palate with a 5-year follow-up","authors":"Pongjai Virarat, Pinai Nirunrungrueng, Paiboon Techalertpaisarn, Nicha Ungvijanpunya","doi":"10.25259/apos_150_2023","DOIUrl":"https://doi.org/10.25259/apos_150_2023","url":null,"abstract":"The nasoalveolar molding (NAM) appliance has been the appliance of choice for pre-surgical orthopedics to improve nasal and lip morphology, and optimally align the alveolar segments before cheiloplasty. However, the appliance has some limitations, including its complexity and long clinical chair time for appliance adjustments. In this case report, we present a patient treated for a right complete cleft lip and palate using three types of Korat modification for NAM with a 5-year follow-up. This study demonstrated that the Korat-NAM improved the aforementioned issues and was suitable for patients at different stages before and after lip and palate repair.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135136298","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}
Objectives: The first aim of this study was to investigate the correlation between chronological age, cervical vertebral maturation (CVM) stage, and midpalatal suture (MPS) maturation stage. The second aim was to assess the relationship between the prognosis for rapid maxillary expansion (RME) and age, CVM stage, and MPS maturation stage. Material and Methods: We divided 109 participants into three age groups: <15 years, 15–25 years, and >25 years. The participants had undergone both cone-beam computed tomography (CBCT) and lateral cephalometric X-ray examination. Their MPS maturation stage was classified as A to E and CVM stage as cervical stage 1 (CS1) to CS6, according to a previously proposed method. We used the weighted kappa coefficient to assess intra-examiner agreement and Spearman’s correlation coefficient, to evaluate the correlations of MPS maturation stage with age and CVM stage. Results: The weighted kappa coefficients were 0.849 and 0.923 for the identification of MPS maturation stage and CVM stage, respectively. There were significant, but weak correlations between MPS maturation stage and age ( r = 0.313, P = 0.001) and, CVM stage ( r = 0.287, P = 0.002). MPS stage C was the most prevalent across all age groups and all CVM stages. Conclusion: Chronological age and CVM stage may not accurately predict MPS maturation stage, especially in older patients. Further, the prognosis for RME may not be strongly related to either CVM or MPS maturation stage. We recommend using CBCT X-rays for individual MPS assessments before selecting the type of maxillary expansion treatment.
目的:本研究的第一个目的是探讨实足年龄、颈椎成熟(CVM)阶段和中腭缝合(MPS)成熟阶段之间的相关性。第二个目的是评估快速上颌扩张(RME)的预后与年龄、CVM分期和MPS成熟阶段的关系。材料和方法:我们将109名参与者分为三个年龄组:15岁、15 - 25岁和25岁。参与者接受了锥束计算机断层扫描(CBCT)和侧位头颅x线检查。根据先前提出的方法，将其MPS成熟阶段分为A至E期，CVM阶段分为宫颈1期(CS1)至CS6期。采用加权kappa系数和Spearman相关系数来评价MPS成熟阶段与年龄和CVM阶段的相关性。结果:MPS成熟期和CVM成熟期的加权kappa系数分别为0.849和0.923。MPS成熟阶段与年龄(r = 0.313, P = 0.001)、CVM阶段(r = 0.287, P = 0.002)存在显著相关性，但相关性较弱。MPS C期在所有年龄组和所有CVM分期中最为普遍。结论:年龄和CVM分期不能准确预测MPS成熟阶段，尤其是老年患者。此外，RME的预后可能与CVM或MPS成熟阶段无关。我们建议在选择上颌扩张治疗类型之前，使用CBCT x线进行个体MPS评估。
{"title":"Investigation of the correlation of midpalatal suture maturation stage with chronological age and cervical vertebral maturation stage","authors":"Chin-Chen Yang, Meng-Yen Chen, Jia-Kuang Liu, Chen-Jung Chang","doi":"10.25259/apos_86_2023","DOIUrl":"https://doi.org/10.25259/apos_86_2023","url":null,"abstract":"Objectives: The first aim of this study was to investigate the correlation between chronological age, cervical vertebral maturation (CVM) stage, and midpalatal suture (MPS) maturation stage. The second aim was to assess the relationship between the prognosis for rapid maxillary expansion (RME) and age, CVM stage, and MPS maturation stage. Material and Methods: We divided 109 participants into three age groups: <15 years, 15–25 years, and >25 years. The participants had undergone both cone-beam computed tomography (CBCT) and lateral cephalometric X-ray examination. Their MPS maturation stage was classified as A to E and CVM stage as cervical stage 1 (CS1) to CS6, according to a previously proposed method. We used the weighted kappa coefficient to assess intra-examiner agreement and Spearman’s correlation coefficient, to evaluate the correlations of MPS maturation stage with age and CVM stage. Results: The weighted kappa coefficients were 0.849 and 0.923 for the identification of MPS maturation stage and CVM stage, respectively. There were significant, but weak correlations between MPS maturation stage and age ( r = 0.313, P = 0.001) and, CVM stage ( r = 0.287, P = 0.002). MPS stage C was the most prevalent across all age groups and all CVM stages. Conclusion: Chronological age and CVM stage may not accurately predict MPS maturation stage, especially in older patients. Further, the prognosis for RME may not be strongly related to either CVM or MPS maturation stage. We recommend using CBCT X-rays for individual MPS assessments before selecting the type of maxillary expansion treatment.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"19 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135773681","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}
This case report presents the multidisciplinary management of a patient with severe skeletal Class III malocclusion, anterior open bite, dentigerous cyst, and multiple restorations. The patient underwent orthodonticorthognathic treatment, autotransplantation, cyst removal, and esthetic rehabilitation with porcelain veneers. The presurgical orthodontic decompensation of the proclined upper incisors involved mini-screw-assisted entire upper arch distalization. The bimaxillary osteotomy included advancing the maxilla, mandibular setback, rotating the maxillomandibular complex clockwise, and moving the chin posteriorly. The role of multidisciplinary treatment is very important in orthognathic patients with compromised dentition. Autotransplantation could help patients avoid the need for prosthetic implants. Entire arch distalization could be a possible alternative to premolar extraction for presurgical orthodontic decompensation in cases of proclined incisors.
{"title":"Multidisciplinary orthodontic-orthognathic management of severe skeletal Class III malocclusion and anterior open bite","authors":"Tong Minh Son, Nguyen Viet Anh, Dinh Vinh Ninh","doi":"10.25259/apos_78_2023","DOIUrl":"https://doi.org/10.25259/apos_78_2023","url":null,"abstract":"This case report presents the multidisciplinary management of a patient with severe skeletal Class III malocclusion, anterior open bite, dentigerous cyst, and multiple restorations. The patient underwent orthodonticorthognathic treatment, autotransplantation, cyst removal, and esthetic rehabilitation with porcelain veneers. The presurgical orthodontic decompensation of the proclined upper incisors involved mini-screw-assisted entire upper arch distalization. The bimaxillary osteotomy included advancing the maxilla, mandibular setback, rotating the maxillomandibular complex clockwise, and moving the chin posteriorly. The role of multidisciplinary treatment is very important in orthognathic patients with compromised dentition. Autotransplantation could help patients avoid the need for prosthetic implants. Entire arch distalization could be a possible alternative to premolar extraction for presurgical orthodontic decompensation in cases of proclined incisors.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"16 06","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134908844","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}
Francesca Cremonini, Francesca Pavan, Federica Pellitteri, Mario Palone, Luca Lombardo
Objectives: The objective of this pilot study was to evaluate the crevicular fluid volume (GCF) increase from a quantitative point of view in the first 8 hours of clear aligner treatment. Then, its variation and the amount of Orthodontic Tooth Movement (OTM) obtained with clear aligners was evaluated considering two different protocols, one of 20 h and one of 12 h. Material and Methods: A total of 10 healthy, adult patients were selected to participate in a split-mouth study where an orthodontic treatment with clear aligners was planned. Vestibular crown uncontrolled tipping was planned for upper lateral-posterior sectors. At 0H (baseline), and every hour for the first 8 hours of use, three GCF samples were collected. Then, all patients were asked to wear one random half of the upper aligner for 12 hours per day (Group 1) and the other half for 20 hours per day (Group 2). The GCF samples were measured using the Periotron 8000 device to quantify inflammation. Then, the amount of movement obtained was calculated by considering the FA point shift in mm with Geomagic X Control Software. Results: No differences were found between the extent of inflammation in terms of GCF volume and hours of intermittent force application (group 1 vs group 2). Conclusion: The amount of GCF assessed through Periotron 8000 increases significantly from the moment forces are applied through clear aligners. Considering the limitations of the following pilot study, it would appear that the GCF amount is directly related to the amount of movement obtained.
目的:本初步研究的目的是从定量的角度评估沟液体积(GCF)增加在透明对准器治疗的前8小时。然后，根据两种不同的方案，一种是20小时，另一种是12小时，评估其变化和正畸牙齿运动(OTM)的数量。材料和方法:总共选择10名健康的成年患者参加裂口研究，计划使用透明对准器进行正畸治疗。前庭冠不受控制的倾斜是计划在上外侧后部门。在0H(基线)和使用前8小时的每小时，收集3个GCF样本。然后，所有患者被要求每天随机佩戴一半的上牙矫正器12小时(第一组)，另一半每天佩戴20小时(第二组)。使用Periotron 8000设备测量GCF样本以量化炎症。然后，利用Geomagic X Control软件，考虑FA点的位移，以mm为单位计算得到的移动量。结果:炎症程度在GCF体积和间歇施力时间方面没有差异(1组与2组)。结论:通过Periotron 8000评估的GCF量从通过透明矫正器施加力的时刻起显着增加。考虑到以下试点研究的局限性，GCF量似乎与获得的运动量直接相关。
{"title":"Variation of gingival crevicular fluid volume in early orthodontic tooth movement with clear aligner: A pilot study","authors":"Francesca Cremonini, Francesca Pavan, Federica Pellitteri, Mario Palone, Luca Lombardo","doi":"10.25259/apos_60_2023","DOIUrl":"https://doi.org/10.25259/apos_60_2023","url":null,"abstract":"Objectives: The objective of this pilot study was to evaluate the crevicular fluid volume (GCF) increase from a quantitative point of view in the first 8 hours of clear aligner treatment. Then, its variation and the amount of Orthodontic Tooth Movement (OTM) obtained with clear aligners was evaluated considering two different protocols, one of 20 h and one of 12 h. Material and Methods: A total of 10 healthy, adult patients were selected to participate in a split-mouth study where an orthodontic treatment with clear aligners was planned. Vestibular crown uncontrolled tipping was planned for upper lateral-posterior sectors. At 0H (baseline), and every hour for the first 8 hours of use, three GCF samples were collected. Then, all patients were asked to wear one random half of the upper aligner for 12 hours per day (Group 1) and the other half for 20 hours per day (Group 2). The GCF samples were measured using the Periotron 8000 device to quantify inflammation. Then, the amount of movement obtained was calculated by considering the FA point shift in mm with Geomagic X Control Software. Results: No differences were found between the extent of inflammation in terms of GCF volume and hours of intermittent force application (group 1 vs group 2). Conclusion: The amount of GCF assessed through Periotron 8000 increases significantly from the moment forces are applied through clear aligners. Considering the limitations of the following pilot study, it would appear that the GCF amount is directly related to the amount of movement obtained.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135886847","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}
Wilmar Andrés Melo Andrade, William Eduardo Fayad Bajaire, Valentina Fayad Jaramillo, Tania Alejandra González García
Objectives: The aim of the study was to evaluate the effect of resin attachments on the displacement and deformation pattern of the aligner plastic, determine the center of rotation and stress distribution in the upper canine during space closure using the finite element method (FEM), and evaluate the plastic Aligner deformation. Materials and Method s: A computer-assisted design model of the superior right hemiarch was constructed with the simulation of a first premolar extraction and a canine distalization, recreating the periodontal ligament and alveolar bone. FEMs were created to analyze the behavior of stress and displacement of the upper right canine with aligners in four situations, one without attachment, and three with bonded attachments (vertical rectangular, rectangular beveled, optimized root control). In addition, the plastic deformation of the aligner was evaluated. Results: In the simulation without attachment, there was no apical movement, while with vertical rectangular and rectangular beveled the behavior was similar with crown distal displacement and mesial apex displacement. The optimized attachment had a better movement control of the canine body respecting the crown and apical movement toward the same direction. The mayor plastic deformation was shown without attachment and no deformation was evidenced with optimized attachment. Conclusion: The FEM showed that nevertheless the optimized attachment produced a distal crown and apical displacement with the use of plastic aligners during the space closure, the apex only moved ¼ of the distal crown movement. Our results suggest that to obtain a pure translation of the canine with aligners, it would be necessary the use of auxiliars which complement the needed biomechanics.
{"title":"Effects of three types of attachments in the displacements, and distribution of stress and plastic deformation, and trough finite elements (FEM)","authors":"Wilmar Andrés Melo Andrade, William Eduardo Fayad Bajaire, Valentina Fayad Jaramillo, Tania Alejandra González García","doi":"10.25259/apos_19_2023","DOIUrl":"https://doi.org/10.25259/apos_19_2023","url":null,"abstract":"Objectives: The aim of the study was to evaluate the effect of resin attachments on the displacement and deformation pattern of the aligner plastic, determine the center of rotation and stress distribution in the upper canine during space closure using the finite element method (FEM), and evaluate the plastic Aligner deformation. Materials and Method s: A computer-assisted design model of the superior right hemiarch was constructed with the simulation of a first premolar extraction and a canine distalization, recreating the periodontal ligament and alveolar bone. FEMs were created to analyze the behavior of stress and displacement of the upper right canine with aligners in four situations, one without attachment, and three with bonded attachments (vertical rectangular, rectangular beveled, optimized root control). In addition, the plastic deformation of the aligner was evaluated. Results: In the simulation without attachment, there was no apical movement, while with vertical rectangular and rectangular beveled the behavior was similar with crown distal displacement and mesial apex displacement. The optimized attachment had a better movement control of the canine body respecting the crown and apical movement toward the same direction. The mayor plastic deformation was shown without attachment and no deformation was evidenced with optimized attachment. Conclusion: The FEM showed that nevertheless the optimized attachment produced a distal crown and apical displacement with the use of plastic aligners during the space closure, the apex only moved ¼ of the distal crown movement. Our results suggest that to obtain a pure translation of the canine with aligners, it would be necessary the use of auxiliars which complement the needed biomechanics.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135886844","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}
Francesca Cremonini, Daniela Guiducci, Mario Palone, Luca Lombardo
Objective: The aim of the study was to describe a clinical case of a Class III malocclusion and severe open bite approached with clear aligners (CAs) and intermaxillary elastics. Case Presentation: A 21-year-old male patient showed to the dental clinic asking for orthodontic treatment. His chief complaint was an unpleasant smile esthetics. The patient showed an oval face with increased length of the lower third of the face, slight mandibular asymmetry, and concave profile. On intraoral evaluation, a bilateral canine and molar Class III with reduced overbite could be seen. Pre-treatment panoramic radiograph showed good root parallelism and presence of all dental elements. Cephalometric values confirmed skeletal Class III (Wits Appraisal = −6.5 mm), increased vertical dimension (FMA = 34.3°), correctly inclined upper incisors and retroclined lower incisors. After discussing the treatment options with the patient, CAs (F22, Sweden and Martina, Due Carrare, Padova, Italy) were chosen to approach this malocclusion together with intermaxillary elastics. After 9 months of active treatment involving 18 sets of aligners, the patient showed correct overbite, bilateral canine e molar Class I, leveled and aligned dental arches, and no signs of radicular or bone resorption. Cephalometric parameters show control of vertical dimension (FMA = 34.4°), upper incisor flaring and lower incisor retroclination, and signs of a dentoalveolar compensation. Conclusion: Careful diagnosis, treatment planning, and clinical management of CAs and intermaxillary elastics led to a successful dentoalveolar compensation featured by good occlusal results, bilateral Class I relationship, and normal overbite which remained stable after 1 year from the end of treatment.
{"title":"Clear aligners for Class III malocclusion and severe open bite camouflage: A case report","authors":"Francesca Cremonini, Daniela Guiducci, Mario Palone, Luca Lombardo","doi":"10.25259/apos_76_2023","DOIUrl":"https://doi.org/10.25259/apos_76_2023","url":null,"abstract":"Objective: The aim of the study was to describe a clinical case of a Class III malocclusion and severe open bite approached with clear aligners (CAs) and intermaxillary elastics. Case Presentation: A 21-year-old male patient showed to the dental clinic asking for orthodontic treatment. His chief complaint was an unpleasant smile esthetics. The patient showed an oval face with increased length of the lower third of the face, slight mandibular asymmetry, and concave profile. On intraoral evaluation, a bilateral canine and molar Class III with reduced overbite could be seen. Pre-treatment panoramic radiograph showed good root parallelism and presence of all dental elements. Cephalometric values confirmed skeletal Class III (Wits Appraisal = −6.5 mm), increased vertical dimension (FMA = 34.3°), correctly inclined upper incisors and retroclined lower incisors. After discussing the treatment options with the patient, CAs (F22, Sweden and Martina, Due Carrare, Padova, Italy) were chosen to approach this malocclusion together with intermaxillary elastics. After 9 months of active treatment involving 18 sets of aligners, the patient showed correct overbite, bilateral canine e molar Class I, leveled and aligned dental arches, and no signs of radicular or bone resorption. Cephalometric parameters show control of vertical dimension (FMA = 34.4°), upper incisor flaring and lower incisor retroclination, and signs of a dentoalveolar compensation. Conclusion: Careful diagnosis, treatment planning, and clinical management of CAs and intermaxillary elastics led to a successful dentoalveolar compensation featured by good occlusal results, bilateral Class I relationship, and normal overbite which remained stable after 1 year from the end of treatment.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135886846","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}
Kevin Yoshiori Kai, Ronnel Azizollahi, S. Oberoi, A. Jheon, M. Bajestan
The objective of this study was to utilize digital models and cone-beam computed tomography (CBCT) radiographs to quantify the skeletal and dentoalveolar maxillary expansion in Phase I orthodontic treatment using clear aligner therapy. Fifty-four patients (22 females and 32 males) had measurements taken on both the pre-treatment and post-treatment intraoral scans from the mesiolingual cusps of the maxillary permanent first molars and the cusp tips of the maxillary primary canines to perform model analysis of dentoalveolar expansion. The planned amount of expansion in the ClinCheck® setup was compared to the actual expansion. Twenty-nine patients (14 females and 15 males) out of 54 patients had both pre-treatment and post-treatment CBCT scans, which also allowed us to perform measurements between maxillary permanent first molars and between maxillary primary canines using CBCT data. Posterior expansion of 2.40 mm between maxillary permanent first molars and anterior expansion of 4.01 mm between maxillary primary canines was observed. A comparison with ClinCheck® showed percent yields of 51.15% for posterior expansion and 64.73% for anterior expansion. CBCT analysis displayed posterior expansion of 1.89 mm between the first molars, 1.87 mm between first molar cementoenamel junctions (CEJs), an angle change of −1.16° (buccal tipping) between first molars, anterior expansion of 3.64 mm between the primary canines, 1.78 mm between primary canine CEJs, and an angle change of 24.73° (facial tipping) between the primary canines. Our study highlights the potential capability of Phase I orthodontic treatment with clear aligners and shows that maxillary expansion does occur with the use of clear aligners.
{"title":"An evaluation of maxillary expansion after Phase I orthodontic treatment with clear aligners using model analysis and cone-beam computed tomography","authors":"Kevin Yoshiori Kai, Ronnel Azizollahi, S. Oberoi, A. Jheon, M. Bajestan","doi":"10.25259/apos_168_2022","DOIUrl":"https://doi.org/10.25259/apos_168_2022","url":null,"abstract":"\u0000\u0000The objective of this study was to utilize digital models and cone-beam computed tomography (CBCT) radiographs to quantify the skeletal and dentoalveolar maxillary expansion in Phase I orthodontic treatment using clear aligner therapy.\u0000\u0000\u0000\u0000Fifty-four patients (22 females and 32 males) had measurements taken on both the pre-treatment and post-treatment intraoral scans from the mesiolingual cusps of the maxillary permanent first molars and the cusp tips of the maxillary primary canines to perform model analysis of dentoalveolar expansion. The planned amount of expansion in the ClinCheck® setup was compared to the actual expansion. Twenty-nine patients (14 females and 15 males) out of 54 patients had both pre-treatment and post-treatment CBCT scans, which also allowed us to perform measurements between maxillary permanent first molars and between maxillary primary canines using CBCT data.\u0000\u0000\u0000\u0000Posterior expansion of 2.40 mm between maxillary permanent first molars and anterior expansion of 4.01 mm between maxillary primary canines was observed. A comparison with ClinCheck® showed percent yields of 51.15% for posterior expansion and 64.73% for anterior expansion. CBCT analysis displayed posterior expansion of 1.89 mm between the first molars, 1.87 mm between first molar cementoenamel junctions (CEJs), an angle change of −1.16° (buccal tipping) between first molars, anterior expansion of 3.64 mm between the primary canines, 1.78 mm between primary canine CEJs, and an angle change of 24.73° (facial tipping) between the primary canines.\u0000\u0000\u0000\u0000Our study highlights the potential capability of Phase I orthodontic treatment with clear aligners and shows that maxillary expansion does occur with the use of clear aligners.\u0000","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"55 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83885746","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}
Accidental ingestion or aspiration of dental foreign bodies is a life-threatening medical emergency. Orthodontic materials such as brackets, bands, wire segments, and appliances are the second most common of foreign bodies to be ingested. Immediate retrieval from the stomach before the object passes the duodenal sweep is recommended. This article reports a case of retrieval of accidentally ingested tube pre-welded molar band within 45 min of ingestion, using endoscopy.
{"title":"Immediate retrieval of an accidentally ingested tube pre-welded molar band from stomach – A case report","authors":"J. M. Iqbal, B. Balashanmugam, M. Keerthana","doi":"10.25259/apos_50_2023","DOIUrl":"https://doi.org/10.25259/apos_50_2023","url":null,"abstract":"Accidental ingestion or aspiration of dental foreign bodies is a life-threatening medical emergency. Orthodontic materials such as brackets, bands, wire segments, and appliances are the second most common of foreign bodies to be ingested. Immediate retrieval from the stomach before the object passes the duodenal sweep is recommended. This article reports a case of retrieval of accidentally ingested tube pre-welded molar band within 45 min of ingestion, using endoscopy.","PeriodicalId":42593,"journal":{"name":"APOS Trends in Orthodontics","volume":"43 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85807253","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}
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