Abstract Objective To investigate the relationship between pre-treatment, predicted post-treatment, and clinically achieved numbers and locations of occlusal contact in cases treated using the Invisalign® Lite appliance (Align Technology, San Jose, California, USA). Materials and Methods Following the application of exclusion and inclusion criteria, 34 patients treated with the Invisalign® Lite appliance were selected. Occlusal contacts were measured at the initial, predicted, and achieved stages on amiga disc file (.adf file) files using the imaging software ImageJ (National Institutes of Health, Bethesda, MD, USA). Descriptive statistics were calculated. Predicted values were provided by Align Technology’s treatment planning software interface, ClinCheck®. Results Most patients were female (n = 29; 85.3%) and the mean (standard deviation) age of the sample was 33.4 (10.72) years. There were significant differences between the initial pre-treatment number of maxillary premolar and molar occlusal contacts and the achieved (a reduction of 58.97%; P < 0.0001), and the total initial pre-treatment number of premolar and molar occlusal mandibular contacts and the achieved (a reduction of 52.5%; P < 0.0001). A significant reduction in the number of posterior occlusal contacts was observed when the achieved number of posterior occlusal contacts was compared to the numbers predicted via ClinCheck® (p<0.0001). Conclusions For minor tooth movement treatment with Invisalign® Lite, more than 50% loss of posterior contact was observed in the achieved outcome when compared to either the initial or predicted number of occlusal contacts.
{"title":"Occlusal Contact Outcomes with Invisalign® Lite Treatment","authors":"Markus Luke Seifert, T. Weir, Maurice J Meade","doi":"10.2478/aoj-2023-0019","DOIUrl":"https://doi.org/10.2478/aoj-2023-0019","url":null,"abstract":"Abstract Objective To investigate the relationship between pre-treatment, predicted post-treatment, and clinically achieved numbers and locations of occlusal contact in cases treated using the Invisalign® Lite appliance (Align Technology, San Jose, California, USA). Materials and Methods Following the application of exclusion and inclusion criteria, 34 patients treated with the Invisalign® Lite appliance were selected. Occlusal contacts were measured at the initial, predicted, and achieved stages on amiga disc file (.adf file) files using the imaging software ImageJ (National Institutes of Health, Bethesda, MD, USA). Descriptive statistics were calculated. Predicted values were provided by Align Technology’s treatment planning software interface, ClinCheck®. Results Most patients were female (n = 29; 85.3%) and the mean (standard deviation) age of the sample was 33.4 (10.72) years. There were significant differences between the initial pre-treatment number of maxillary premolar and molar occlusal contacts and the achieved (a reduction of 58.97%; P < 0.0001), and the total initial pre-treatment number of premolar and molar occlusal mandibular contacts and the achieved (a reduction of 52.5%; P < 0.0001). A significant reduction in the number of posterior occlusal contacts was observed when the achieved number of posterior occlusal contacts was compared to the numbers predicted via ClinCheck® (p<0.0001). Conclusions For minor tooth movement treatment with Invisalign® Lite, more than 50% loss of posterior contact was observed in the achieved outcome when compared to either the initial or predicted number of occlusal contacts.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41331424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jenny Doan, Nessa Finlay, Amy Lee, Thomas Ethell, Narayan H. Gandedkar, M. Darendeliler
Abstract Background Three dimensional (3D) facial imaging is becoming a popular method of facial analysis and a means of anthropometry. There is potential for 3D imaging to provide enough diagnostic information to parallel lateral cephalograms, which could, in time, reduce the need for radiation exposure to patients. The present study aimed to assess the accuracy of the Bellus3D ARC-7 (Bellus) camera by comparing the measurements of soft tissue facial landmarks obtained from Bellus scans to the measurements taken using Vernier callipers. Method Nineteen anatomical points were located on four subjects using a standard black ballpoint pen on a white, circular sticker. Distances were measured between these points using digital callipers, with the subject in a resting pose. This was repeated twice by two examiners for each subject. Two examiners subsequently performed measurements of each subject in a smiling pose. Following landmark identification, images were captured under standard conditions, using the Bellus camera. The same measurements were obtained digitally, repeated twice by two examiners for each subject in both resting and smiling poses. Results There was high precision in repeated measurements on the digital models, with less than 1.5 mm deviation between measurements. Both intra-examiner and inter-examiner reproducibility were greater following the digital measurements compared to manual measurements, with 100% of the digital measurements of landmarks falling within a set threshold deviation of ≤1.5 mm. When comparing the manual and digital measurements, the greatest deviations (>1.0 mm) occurred in regions around the cheeks and lower third of the face, while the measurements for the ears and midline structures (forehead and nose bridge) deviated the least (≤1.0 mm). This was demonstrated in models at rest and smiling. Conclusions The Bellus system produced an accurate and true image of the face from which reproducible measurements can be made within and between examiners. 3D facial images from the Bellus3D ARC-7 system were comparable to direct anthropometry, therefore the use of 3D facial scanning in orthodontics for diagnosis and treatment planning appears promising.
{"title":"The accuracy (trueness and precision) of Bellus3DARC-7 and an in-vivo analysis of intra and inter-examiner reliability of digital and manual anthropometry","authors":"Jenny Doan, Nessa Finlay, Amy Lee, Thomas Ethell, Narayan H. Gandedkar, M. Darendeliler","doi":"10.2478/aoj-2023-0015","DOIUrl":"https://doi.org/10.2478/aoj-2023-0015","url":null,"abstract":"Abstract Background Three dimensional (3D) facial imaging is becoming a popular method of facial analysis and a means of anthropometry. There is potential for 3D imaging to provide enough diagnostic information to parallel lateral cephalograms, which could, in time, reduce the need for radiation exposure to patients. The present study aimed to assess the accuracy of the Bellus3D ARC-7 (Bellus) camera by comparing the measurements of soft tissue facial landmarks obtained from Bellus scans to the measurements taken using Vernier callipers. Method Nineteen anatomical points were located on four subjects using a standard black ballpoint pen on a white, circular sticker. Distances were measured between these points using digital callipers, with the subject in a resting pose. This was repeated twice by two examiners for each subject. Two examiners subsequently performed measurements of each subject in a smiling pose. Following landmark identification, images were captured under standard conditions, using the Bellus camera. The same measurements were obtained digitally, repeated twice by two examiners for each subject in both resting and smiling poses. Results There was high precision in repeated measurements on the digital models, with less than 1.5 mm deviation between measurements. Both intra-examiner and inter-examiner reproducibility were greater following the digital measurements compared to manual measurements, with 100% of the digital measurements of landmarks falling within a set threshold deviation of ≤1.5 mm. When comparing the manual and digital measurements, the greatest deviations (>1.0 mm) occurred in regions around the cheeks and lower third of the face, while the measurements for the ears and midline structures (forehead and nose bridge) deviated the least (≤1.0 mm). This was demonstrated in models at rest and smiling. Conclusions The Bellus system produced an accurate and true image of the face from which reproducible measurements can be made within and between examiners. 3D facial images from the Bellus3D ARC-7 system were comparable to direct anthropometry, therefore the use of 3D facial scanning in orthodontics for diagnosis and treatment planning appears promising.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44675682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Emmanuel Chan, O. Dalci, M. Irving, R. Byun, A. K. Papadopoulou, M. Ali Darendeliler
Abstract Introduction: Despite the serious health implications associated with obstructive sleep apnoea, the condition remains under-diagnosed. This study aims to evaluate the awareness of the condition amongst the Australian community. Methods: A total of 2016 respondents recruited from a web-based panel completed an online questionnaire which assessed awareness and experience of obstructive sleep apnoea and sleep-disordered breathing. The association between the level of awareness and various socio-demographic variables was analysed using uni- and multivariate analyses. Results: The results of the questionnaire indicated that 50% and 70% of participants were unaware of adult and paediatric obstructive sleep apnoea. Socio-demographic variables including age, annual household income and education level significantly influenced a participant’s level of awareness. Approximately 8.3% of the participants had previously been diagnosed with obstructive sleep apnoea. However, 65% of participants exhibiting symptoms of daytime sleepiness had not sought health care. Paediatric sleep apnoea had been previously diagnosed in 7.1% of children residing in participant’s households but 49% of children with regular snoring had not been medically evaluated. Conclusion: A deficiency exists in the awareness of sleep apnoea amongst the Australian general public. This is reflected in the discrepancy between the number of participants exhibiting potential symptoms and those who sought medical advice.
{"title":"Low levels of awareness of obstructive sleep apnoea amongst the Australian general public","authors":"Emmanuel Chan, O. Dalci, M. Irving, R. Byun, A. K. Papadopoulou, M. Ali Darendeliler","doi":"10.2478/aoj-2023-0003","DOIUrl":"https://doi.org/10.2478/aoj-2023-0003","url":null,"abstract":"Abstract Introduction: Despite the serious health implications associated with obstructive sleep apnoea, the condition remains under-diagnosed. This study aims to evaluate the awareness of the condition amongst the Australian community. Methods: A total of 2016 respondents recruited from a web-based panel completed an online questionnaire which assessed awareness and experience of obstructive sleep apnoea and sleep-disordered breathing. The association between the level of awareness and various socio-demographic variables was analysed using uni- and multivariate analyses. Results: The results of the questionnaire indicated that 50% and 70% of participants were unaware of adult and paediatric obstructive sleep apnoea. Socio-demographic variables including age, annual household income and education level significantly influenced a participant’s level of awareness. Approximately 8.3% of the participants had previously been diagnosed with obstructive sleep apnoea. However, 65% of participants exhibiting symptoms of daytime sleepiness had not sought health care. Paediatric sleep apnoea had been previously diagnosed in 7.1% of children residing in participant’s households but 49% of children with regular snoring had not been medically evaluated. Conclusion: A deficiency exists in the awareness of sleep apnoea amongst the Australian general public. This is reflected in the discrepancy between the number of participants exhibiting potential symptoms and those who sought medical advice.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44702953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Craig Murphy, Xiaoming Xu, Q. Yu, P. Armbruster, Richard W Ballard
Abstract Aim: This study examined the bond strength associated with Denteshield® Primer as a replacement for a conventional, non-antimicrobial, orthodontic primer. Materials/methods: Sixty human premolar teeth were divided into three groups (n=20). Each group was assigned to receive either Denteshield®, Pro Seal® or Transbond XT TM primer. Light-cured Transbond XTTM adhesive resin was utilised to bond a bracket to each sample tooth following the application of the assigned primer. Ten samples from each group were tested for shear bond strength using a universal testing machine. The remaining 10 samples from each group underwent bracket debonding using a debonding plier. Applying an adhesive remnant index, each sample was scored under a microscope at 2.5× magnification. The data were analysed using One-way ANOVA, the Tukey post hoc test and the Kruskal–Wallis test. Results: The mean shear bond strength (MPa) of the three groups was: Denteshield® (33.18 ± 13.56), Pro Seal® (23.68 ± 12.04) and Transbond XTTM primer (26.19 ± 9.44). There was no significant difference in the shear bond strength across all three groups (p = 0.19). The adhesive remnant index results also showed no significant differences between the three groups (p = 0.278). Conclusion: Based on the shear bond strengths obtained in this study and the previously reported values necessary for clinical use, all three primers appear adequate for clinical use. (Aust Orthod J 2022; 39: 49 - 54. DOI: 10.2478/aoj-2023-0009)
{"title":"Bond strength of orthodontic brackets using the anti-bacterial primer, Denteshield®","authors":"Craig Murphy, Xiaoming Xu, Q. Yu, P. Armbruster, Richard W Ballard","doi":"10.2478/aoj-2023.0009","DOIUrl":"https://doi.org/10.2478/aoj-2023.0009","url":null,"abstract":"Abstract Aim: This study examined the bond strength associated with Denteshield® Primer as a replacement for a conventional, non-antimicrobial, orthodontic primer. Materials/methods: Sixty human premolar teeth were divided into three groups (n=20). Each group was assigned to receive either Denteshield®, Pro Seal® or Transbond XT TM primer. Light-cured Transbond XTTM adhesive resin was utilised to bond a bracket to each sample tooth following the application of the assigned primer. Ten samples from each group were tested for shear bond strength using a universal testing machine. The remaining 10 samples from each group underwent bracket debonding using a debonding plier. Applying an adhesive remnant index, each sample was scored under a microscope at 2.5× magnification. The data were analysed using One-way ANOVA, the Tukey post hoc test and the Kruskal–Wallis test. Results: The mean shear bond strength (MPa) of the three groups was: Denteshield® (33.18 ± 13.56), Pro Seal® (23.68 ± 12.04) and Transbond XTTM primer (26.19 ± 9.44). There was no significant difference in the shear bond strength across all three groups (p = 0.19). The adhesive remnant index results also showed no significant differences between the three groups (p = 0.278). Conclusion: Based on the shear bond strengths obtained in this study and the previously reported values necessary for clinical use, all three primers appear adequate for clinical use. (Aust Orthod J 2022; 39: 49 - 54. DOI: 10.2478/aoj-2023-0009)","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47950871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This case report describes the lingual orthodontic treatment of a 28-year-old female patient who presented with a bimaxillary protrusion malocclusion, a hyperdivergent facial pattern, mentalis strain, and a ‘gummy’ smile. To achieve favourable occlusal and facial results, the four first premolars were extracted, and micro-screws utilised to provide maximum anchorage. With the widespread application of three-dimensional technology, a digital goal-oriented treatment plan was applied for its predictability and precision. A fully customised lingual appliance system with preset torque in the anterior teeth combined with ribbon-wise arch wires was placed to prevent excessive lingual inclination of the incisors during retraction. As a result, an attractive facial profile and a well-aligned dentition with ideal intercuspation was obtained.
{"title":"Digital lingual appliance combined with micro-screws for the treatment of a skeletal bimaxillary protrusion and ‘gummy’ smile","authors":"Yu Chen, Yuan Gao, J. He, Shanchun Fu, Lei Wang","doi":"10.2478/aoj-2023-0011","DOIUrl":"https://doi.org/10.2478/aoj-2023-0011","url":null,"abstract":"Abstract This case report describes the lingual orthodontic treatment of a 28-year-old female patient who presented with a bimaxillary protrusion malocclusion, a hyperdivergent facial pattern, mentalis strain, and a ‘gummy’ smile. To achieve favourable occlusal and facial results, the four first premolars were extracted, and micro-screws utilised to provide maximum anchorage. With the widespread application of three-dimensional technology, a digital goal-oriented treatment plan was applied for its predictability and precision. A fully customised lingual appliance system with preset torque in the anterior teeth combined with ribbon-wise arch wires was placed to prevent excessive lingual inclination of the incisors during retraction. As a result, an attractive facial profile and a well-aligned dentition with ideal intercuspation was obtained.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48051240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Cota-Quintero, M. Bermúdez, R. Ramos-Payán, María de los Ángeles Gastélum-López, J. López-Gutiérrez, Mariana Avendaño-Félix, A. Ayala-Ham, C. Villegas-Mercado, Yolanda Castro-Salazar, M. Aguilar-Medina
Abstract Objective: This study aimed to analyse dysbiotic changes of periodontal pathogenic bacteria and their relationship with different types of fixed orthodontic appliances in a population located in Northwestern Mexico. Methods: Three groups of patients were identified: a control group without orthodontic appliances (C), a conventional-ligating appliance group (CLA), and a self-ligating appliance group (SLA). Periodontal biofilm samples were collected for DNA extraction to identify the presence and load of Treponema denticola, Prevotella intermedia, and Fusobacterium nucleatum, using a quantitative real-time PCR technique. Results: A total of 92 patients were included. The results showed that F. nucleatum was present in all groups including the control patients (C 96%, CLA 100%, and SLA 67%, respectively). Female participants displayed a higher frequency of periodontal pathogens than males, but males were more affected by F. nucleatum. In addition, the presence of T. denticola and P. intermedia was time-dependent, being more frequent in patients in treatment for longer than 12 months whereas CLA showed 74% and 78% of positive samples and SLA showed 78% and 89%, respectively. F. nucleatum was present in 100% of CLA samples before and after 12 months of treatment and its load was higher in the SLA group after 12 months. Conclusions: Dysbiotic changes that could affect the periodontal tissues were seen in patients wearing orthodontic appliances. The frequency of F. nucleatum was significantly higher in CLA and noted with a greater load in SLA. In addition, female participants showed a higher frequency of periodontal pathogens while male subjects were more affected by F. nucleatum. As expected, treatment for longer than 12 months correlated with a higher frequency of all periodontal pathogens. The results support the concept that dysbiosis leading to periodontal disease can be caused by the rise of a dominant species, instead of the appearance of a new species.
{"title":"Dysbiotic changes of periodontal pathogens in patients wearing conventional and self-ligating orthodontic appliances","authors":"J. Cota-Quintero, M. Bermúdez, R. Ramos-Payán, María de los Ángeles Gastélum-López, J. López-Gutiérrez, Mariana Avendaño-Félix, A. Ayala-Ham, C. Villegas-Mercado, Yolanda Castro-Salazar, M. Aguilar-Medina","doi":"10.2478/aoj-2023-0006","DOIUrl":"https://doi.org/10.2478/aoj-2023-0006","url":null,"abstract":"Abstract Objective: This study aimed to analyse dysbiotic changes of periodontal pathogenic bacteria and their relationship with different types of fixed orthodontic appliances in a population located in Northwestern Mexico. Methods: Three groups of patients were identified: a control group without orthodontic appliances (C), a conventional-ligating appliance group (CLA), and a self-ligating appliance group (SLA). Periodontal biofilm samples were collected for DNA extraction to identify the presence and load of Treponema denticola, Prevotella intermedia, and Fusobacterium nucleatum, using a quantitative real-time PCR technique. Results: A total of 92 patients were included. The results showed that F. nucleatum was present in all groups including the control patients (C 96%, CLA 100%, and SLA 67%, respectively). Female participants displayed a higher frequency of periodontal pathogens than males, but males were more affected by F. nucleatum. In addition, the presence of T. denticola and P. intermedia was time-dependent, being more frequent in patients in treatment for longer than 12 months whereas CLA showed 74% and 78% of positive samples and SLA showed 78% and 89%, respectively. F. nucleatum was present in 100% of CLA samples before and after 12 months of treatment and its load was higher in the SLA group after 12 months. Conclusions: Dysbiotic changes that could affect the periodontal tissues were seen in patients wearing orthodontic appliances. The frequency of F. nucleatum was significantly higher in CLA and noted with a greater load in SLA. In addition, female participants showed a higher frequency of periodontal pathogens while male subjects were more affected by F. nucleatum. As expected, treatment for longer than 12 months correlated with a higher frequency of all periodontal pathogens. The results support the concept that dysbiosis leading to periodontal disease can be caused by the rise of a dominant species, instead of the appearance of a new species.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47414985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marwah Halawani, A. Aloyouny, Dhai Al Rashoud, Atheer Almazarqah, Shouq Albalawi, D. Elfeky, R. H. Al-Serwi, Dur A. Alomair
Abstract Background This study aimed to identify the most effective cleaning method for removable orthodontic clear vacuum-formed retainers (VFRs) and to assess the amount of dental plaque growth by microbiological analysis after performing mechanical, chemical and a combination of both cleaning methods. Methods The subjects were 23 patients from the Princess Nourah bint Abdulrahman University Dental Clinic who were in the retention phase of their orthodontic treatment using VFRs. The duration of the study was five weeks. Every week the subjects were given a new VFR and asked to wear it (20–22 hr/day) with instructions to use one of the following specific cleaning methods: running water, brushing with soap, immersing in sodium carbonate with sulphate cleaning solution, brushing with a fluoride toothpaste, and brushing with water. At the end of each week, the VFRs were returned, and a microbiological analysis was performed. Results At a statistically significant level, the highest bacterial concentrations were found on VFRs cleaned with running water compared to the other cleansing methods. There was no significant difference found in the bacterial count between brushing and toothpaste; brushing and soap, brushing and water, and tablet cleaning methods. Brushing with a fluoride toothpaste was the most effective method for cleaning the VFRs. Conclusion The findings of the present study indicate that cleaning VFRs with water alone is insufficient. Using chemical cleaning solutions and/or mechanical brushing significantly reduces the bacterial count on VFRs surfaces. Brushing with a fluoride toothpaste seems to be the most effective cleaning method for VFRs, given the limitations of the study.
{"title":"Analysis of the growth of dental plaque on the surface of orthodontic vacuum-formed retainers following the use of different cleaning methods","authors":"Marwah Halawani, A. Aloyouny, Dhai Al Rashoud, Atheer Almazarqah, Shouq Albalawi, D. Elfeky, R. H. Al-Serwi, Dur A. Alomair","doi":"10.21307/aoj-2022-0039","DOIUrl":"https://doi.org/10.21307/aoj-2022-0039","url":null,"abstract":"Abstract Background This study aimed to identify the most effective cleaning method for removable orthodontic clear vacuum-formed retainers (VFRs) and to assess the amount of dental plaque growth by microbiological analysis after performing mechanical, chemical and a combination of both cleaning methods. Methods The subjects were 23 patients from the Princess Nourah bint Abdulrahman University Dental Clinic who were in the retention phase of their orthodontic treatment using VFRs. The duration of the study was five weeks. Every week the subjects were given a new VFR and asked to wear it (20–22 hr/day) with instructions to use one of the following specific cleaning methods: running water, brushing with soap, immersing in sodium carbonate with sulphate cleaning solution, brushing with a fluoride toothpaste, and brushing with water. At the end of each week, the VFRs were returned, and a microbiological analysis was performed. Results At a statistically significant level, the highest bacterial concentrations were found on VFRs cleaned with running water compared to the other cleansing methods. There was no significant difference found in the bacterial count between brushing and toothpaste; brushing and soap, brushing and water, and tablet cleaning methods. Brushing with a fluoride toothpaste was the most effective method for cleaning the VFRs. Conclusion The findings of the present study indicate that cleaning VFRs with water alone is insufficient. Using chemical cleaning solutions and/or mechanical brushing significantly reduces the bacterial count on VFRs surfaces. Brushing with a fluoride toothpaste seems to be the most effective cleaning method for VFRs, given the limitations of the study.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46798484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carrol Jin, Michael G. Skilbeck, Ana Low, Wei Lin, Carmen Au, L. Mei
Abstract The clinical management of impacted incisors affected by root dilaceration is challenging. This case report presents the treatment of an adolescent female patient who presented with a deeply impacted, rotated and dilacerated maxillary central incisor and also reviews the current literature on the definition, prevalence, aetiology, diagnosis, and treatment of the anomaly. The impacted and dilacerated incisor was successfully orthodontically treated following a two-stage surgical exposure and after being rotated 100 degrees in the sagittal plane (due to the deep impaction and severe displacement). A Ballista spring and piggyback appliance technique were used to elevate the tooth. The dilacerated incisor was successfully preserved and relocated in the dental arch. The pre-operative and post-operative CBCT scans showed no significant root resorption of the repositioned tooth.
{"title":"Root Dilaceration: A Case Report and Literature Review","authors":"Carrol Jin, Michael G. Skilbeck, Ana Low, Wei Lin, Carmen Au, L. Mei","doi":"10.2478/aoj-2023-0013","DOIUrl":"https://doi.org/10.2478/aoj-2023-0013","url":null,"abstract":"Abstract The clinical management of impacted incisors affected by root dilaceration is challenging. This case report presents the treatment of an adolescent female patient who presented with a deeply impacted, rotated and dilacerated maxillary central incisor and also reviews the current literature on the definition, prevalence, aetiology, diagnosis, and treatment of the anomaly. The impacted and dilacerated incisor was successfully orthodontically treated following a two-stage surgical exposure and after being rotated 100 degrees in the sagittal plane (due to the deep impaction and severe displacement). A Ballista spring and piggyback appliance technique were used to elevate the tooth. The dilacerated incisor was successfully preserved and relocated in the dental arch. The pre-operative and post-operative CBCT scans showed no significant root resorption of the repositioned tooth.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46942904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaosong Xiang, Chunlin Wang, Xiaohang Guan, Lu Wang, Song Cang
Abstract An anterior open bite may be orthodontically treated by either the intrusion of posterior teeth, the extrusion of anterior teeth, or a combination of both. An improvement in bimaxillary protrusion often involves the extraction of premolars and the retraction of the anterior teeth. The treatment of mesiocclusion mainly involves the mesial and/or distal movement of the molars. However, these three types of malocclusions pose significant treatment challenges when using clear aligners. The present case report describes the treatment of a 24-year-old female patient who presented with the above characteristics, which affected her confidence, willingness to smile and masticatory function. A four-premolar extraction plan was designed to resolve the problems using clear aligners as the patient rejected fixed or visible appliances. After 33 months of orthodontic therapy, except for the counter-clockwise rotation of the mandible and the decrease of facial height, the other objectives established in the pre-treatment plan were achieved, and the patient was satisfied with the results. The combination of clear aligners and premolar extractions effectively corrected the skeletal anterior open bite, bimaxillary dentoalveolar protrusion, and mesiocclusion.
{"title":"Treatment of an anterior open bite, bimaxillary protrusion and mesiocclusion by the extraction of premolars and the use of clear aligners","authors":"Xiaosong Xiang, Chunlin Wang, Xiaohang Guan, Lu Wang, Song Cang","doi":"10.2478/aoj-2023-0007","DOIUrl":"https://doi.org/10.2478/aoj-2023-0007","url":null,"abstract":"Abstract An anterior open bite may be orthodontically treated by either the intrusion of posterior teeth, the extrusion of anterior teeth, or a combination of both. An improvement in bimaxillary protrusion often involves the extraction of premolars and the retraction of the anterior teeth. The treatment of mesiocclusion mainly involves the mesial and/or distal movement of the molars. However, these three types of malocclusions pose significant treatment challenges when using clear aligners. The present case report describes the treatment of a 24-year-old female patient who presented with the above characteristics, which affected her confidence, willingness to smile and masticatory function. A four-premolar extraction plan was designed to resolve the problems using clear aligners as the patient rejected fixed or visible appliances. After 33 months of orthodontic therapy, except for the counter-clockwise rotation of the mandible and the decrease of facial height, the other objectives established in the pre-treatment plan were achieved, and the patient was satisfied with the results. The combination of clear aligners and premolar extractions effectively corrected the skeletal anterior open bite, bimaxillary dentoalveolar protrusion, and mesiocclusion.","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44303955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Governor of South Australia officially opens the PR Begg Museum in Adelaide, South Australia","authors":"","doi":"10.2478/aoj-2023-0012","DOIUrl":"https://doi.org/10.2478/aoj-2023-0012","url":null,"abstract":"","PeriodicalId":48559,"journal":{"name":"Australasian Orthodontic Journal","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42932423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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