Abstract Objective The palatal rugae are connective tissue located in the anterior third of the hard palate and present asymmetrically on each side of the palatine raphe. The stability and individualistic features of the palatal rugae have been suggested as an alternative human identification method in forensic medicine. However, there are different views about the tissue’s stability and reliability in individuals undergoing orthodontic expansion, as the palatal mucosa is stretched which likely alters palatal rugal morphology. The present review aims to summarise the available evidence regarding the stability of the palatal rugae after orthodontic expansion. Method Following the PRISMA-Scr guidelines, an extensive search was conducted using three databases (PubMed, Web of Science, and Scopus). Only studies that had control groups were included to allow for comparison. Results A total of six studies were identified. One report did not mention the type of expansion used, another used slow maxillary expansion (SME), and the other four used rapid maxillary expansion (RME). The results related to rugal length, morphological shape, and root mean square were inconclusive, likely because of data heterogeneity in expansion mechanics, the age of inclusion, and measurement outcomes. Conclusion More high-quality research is needed to substantiate the importance of palatal rugae in forensic medicine.
摘要目的腭嵴是位于硬腭前三分之一的结缔组织，不对称分布于腭缝两侧。腭嵴的稳定性和个体特征已被认为是法医学中一种替代的人类识别方法。然而，对于接受正畸扩张的个体，组织的稳定性和可靠性有不同的看法，因为腭粘膜被拉伸，这可能会改变腭粘膜的形态。本综述旨在总结有关正畸扩张后腭嵴稳定性的现有证据。方法遵循PRISMA Scr指南，使用PubMed、Web of Science和Scopus三个数据库进行广泛搜索。为了进行比较，只纳入了有对照组的研究。结果共确定了6项研究。一份报告没有提到所使用的扩张类型，另一份报告使用缓慢上颌扩张（SME），另外四份报告使用快速上颌扩张（RME）。与皱纹长度、形态形状和均方根相关的结果是不确定的，可能是因为膨胀力学、包合物年龄和测量结果的数据异质性。结论需要更多高质量的研究来证实腭嵴在法医学中的重要性。
{"title":"Stability of palatal rugae after orthodontic/orthopaedic expansion: a scoping review","authors":"Sock Nee Tey, Y. Lin, A. M. Mohamed","doi":"10.2478/aoj-2023-0018","DOIUrl":"https://doi.org/10.2478/aoj-2023-0018","url":null,"abstract":"Abstract Objective The palatal rugae are connective tissue located in the anterior third of the hard palate and present asymmetrically on each side of the palatine raphe. The stability and individualistic features of the palatal rugae have been suggested as an alternative human identification method in forensic medicine. However, there are different views about the tissue’s stability and reliability in individuals undergoing orthodontic expansion, as the palatal mucosa is stretched which likely alters palatal rugal morphology. The present review aims to summarise the available evidence regarding the stability of the palatal rugae after orthodontic expansion. Method Following the PRISMA-Scr guidelines, an extensive search was conducted using three databases (PubMed, Web of Science, and Scopus). Only studies that had control groups were included to allow for comparison. Results A total of six studies were identified. One report did not mention the type of expansion used, another used slow maxillary expansion (SME), and the other four used rapid maxillary expansion (RME). The results related to rugal length, morphological shape, and root mean square were inconclusive, likely because of data heterogeneity in expansion mechanics, the age of inclusion, and measurement outcomes. Conclusion More high-quality research is needed to substantiate the importance of palatal rugae in forensic medicine.","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":"45077363","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 Objectives: To compare 10-day and 14-day change regimens to achieve orthodontic tooth movement (OTM) in patients wearing clear aligners and to determine their subsequent pain perception. Material and methods: A total of 175 clear aligner patients were assessed for eligibility. Seventy-two patients were randomly assigned to a 10-day group (N = 36) and a 14-day group (N = 36) and were instructed to change the appliances every 10 or 14 days, respectively. OTM efficacy and OTM variation between the actual and predicted OTM digital models measured by shell-to-shell deviation, as well as pain perception determined by a visual analog scale (VAS), were assessed at T0 (baseline, before the placement of the aligners), T1 (stage 8, after completion of aligners #8), and T2 (stage 16, after completion of aligners #16). Results: The 10-day and 14-day groups showed similar OTM efficacy at both T1 and T2 for all types of tooth movements (p > 0.09 for all) and similar OTM shell-to-shell deviation at T1 (p = 0.06) and T2 (p = 0.22). The two groups also had similar VAS scores of pain perception throughout the study (p > 0.05 for all). Conclusion: The 10-day and 14-day groups showed similar tooth movement and pain perception, suggesting that the clear aligners may be changed every 10 days without a significant compromise in the clinical efficacy of OTM and patient comfort. Trial registration: ChiCTR, ChiCTR-IOR-15007532. Registered 17 November 2015, https://www.chictr.org.cn/showproj.aspx?proj=12500
{"title":"Changing clear aligners every 10 days or 14 days ? A randomised controlled trial","authors":"R. Zhao, L. Mei, H. Long, F. Jian, W. Lai","doi":"10.2478/aoj-2023-0002","DOIUrl":"https://doi.org/10.2478/aoj-2023-0002","url":null,"abstract":"Abstract Objectives: To compare 10-day and 14-day change regimens to achieve orthodontic tooth movement (OTM) in patients wearing clear aligners and to determine their subsequent pain perception. Material and methods: A total of 175 clear aligner patients were assessed for eligibility. Seventy-two patients were randomly assigned to a 10-day group (N = 36) and a 14-day group (N = 36) and were instructed to change the appliances every 10 or 14 days, respectively. OTM efficacy and OTM variation between the actual and predicted OTM digital models measured by shell-to-shell deviation, as well as pain perception determined by a visual analog scale (VAS), were assessed at T0 (baseline, before the placement of the aligners), T1 (stage 8, after completion of aligners #8), and T2 (stage 16, after completion of aligners #16). Results: The 10-day and 14-day groups showed similar OTM efficacy at both T1 and T2 for all types of tooth movements (p > 0.09 for all) and similar OTM shell-to-shell deviation at T1 (p = 0.06) and T2 (p = 0.22). The two groups also had similar VAS scores of pain perception throughout the study (p > 0.05 for all). Conclusion: The 10-day and 14-day groups showed similar tooth movement and pain perception, suggesting that the clear aligners may be changed every 10 days without a significant compromise in the clinical efficacy of OTM and patient comfort. Trial registration: ChiCTR, ChiCTR-IOR-15007532. Registered 17 November 2015, https://www.chictr.org.cn/showproj.aspx?proj=12500","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":"42595303","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":"43057111","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}
Gengru Wang, Dongdong Fang, Xinqin Yin, C. Flores‐Mir
Abstract If patients follow the clinician’s recommendations, clear aligner orthodontic appliances cover the teeth for 20 to 22 hr daily. If oral hygiene is inadequate, bacterial plaque will lay extensively between the tooth surface and the clear aligner and lead to an increased risk of white spot lesions (WSL) and dental caries. Information regarding enamel WSL or caries formation in patients treated with clear aligners has not been widely discussed. This report describes an unusual case of rampant caries and enamel demineralisation in an adolescent due to poor oral hygiene during clear aligner orthodontic treatment. All enamel surfaces were chalky white, fragile, and rough, while approximately 1/4 to 1/2 incisal enamel was lost on most teeth. Interestingly, the exposed dentine presented a mamelon-like shape even though enamel was lost from some lower incisors. This case report discusses different WSL/caries management methods using clear aligners and a 3.5-year follow-up of the patient.
{"title":"A 3.5-year follow-up of an unusual case of rampant caries during clear aligner treatment","authors":"Gengru Wang, Dongdong Fang, Xinqin Yin, C. Flores‐Mir","doi":"10.2478/aoj-2023-0017","DOIUrl":"https://doi.org/10.2478/aoj-2023-0017","url":null,"abstract":"Abstract If patients follow the clinician’s recommendations, clear aligner orthodontic appliances cover the teeth for 20 to 22 hr daily. If oral hygiene is inadequate, bacterial plaque will lay extensively between the tooth surface and the clear aligner and lead to an increased risk of white spot lesions (WSL) and dental caries. Information regarding enamel WSL or caries formation in patients treated with clear aligners has not been widely discussed. This report describes an unusual case of rampant caries and enamel demineralisation in an adolescent due to poor oral hygiene during clear aligner orthodontic treatment. All enamel surfaces were chalky white, fragile, and rough, while approximately 1/4 to 1/2 incisal enamel was lost on most teeth. Interestingly, the exposed dentine presented a mamelon-like shape even though enamel was lost from some lower incisors. This case report discusses different WSL/caries management methods using clear aligners and a 3.5-year follow-up of the patient.","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":"41452931","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 Introduction The correction of facial asymmetry in patients presenting with Goldenhar Syndrome can be challenging due to the complexity of the orthodontic and surgical procedures required, the psychosocial considerations of the patient and the risk of relapse. Materials and methods A Caucasian male with Goldenhar Syndrome originally presented at age 8.2 years with concerns relating to a poor bite. He had previously undertaken surgery for the removal of pre-auricular skin tags on the right side. With ongoing skeletal growth, the facial asymmetry became more obvious and caused the patient to become socially withdrawn. Multidisciplinary treatment involving orthodontics and orthognathic surgery to correct the mandibular asymmetry was delayed until facial growth had slowed. The correction involved the use of an asymmetrical bilateral sagittal split osteotomy and an advancement genioplasty followed by a dermal fat graft and MedporR onlay to the right mandibular body and angle in addition to a refinement genioplasty. Results Follow-up has revealed a partial return of a buccal openbite illustrating the risk of occlusal relapse. Conclusion The case report illustrates the complexity of the orthodontic and surgical management of facial asymmetry, the psychosocial considerations of the patient and the risk of relapse. Multidisciplinary management is essential in the management of Goldenhar Syndrome.
{"title":"Orthodontic considerations for patients presenting with Goldenhar Syndrome: A long-term case report","authors":"P. Fowler, E. Gray, Jennifer A Haworth","doi":"10.2478/aoj-2023-0014","DOIUrl":"https://doi.org/10.2478/aoj-2023-0014","url":null,"abstract":"Abstract Introduction The correction of facial asymmetry in patients presenting with Goldenhar Syndrome can be challenging due to the complexity of the orthodontic and surgical procedures required, the psychosocial considerations of the patient and the risk of relapse. Materials and methods A Caucasian male with Goldenhar Syndrome originally presented at age 8.2 years with concerns relating to a poor bite. He had previously undertaken surgery for the removal of pre-auricular skin tags on the right side. With ongoing skeletal growth, the facial asymmetry became more obvious and caused the patient to become socially withdrawn. Multidisciplinary treatment involving orthodontics and orthognathic surgery to correct the mandibular asymmetry was delayed until facial growth had slowed. The correction involved the use of an asymmetrical bilateral sagittal split osteotomy and an advancement genioplasty followed by a dermal fat graft and MedporR onlay to the right mandibular body and angle in addition to a refinement genioplasty. Results Follow-up has revealed a partial return of a buccal openbite illustrating the risk of occlusal relapse. Conclusion The case report illustrates the complexity of the orthodontic and surgical management of facial asymmetry, the psychosocial considerations of the patient and the risk of relapse. Multidisciplinary management is essential in the management of Goldenhar Syndrome.","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":"43336622","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 Appropriate orthodontic mechanotherapy, particularly in relation to incisor inclination control is a key consideration for successful treatment and the delivery of optimal aesthetics. A novel, easy, safe and effective torquing technique, termed Park’s cervical torque tie, has been devised. A female patient sought orthodontic treatment and presented with a Class II division 2 malocclusion with crowding but a favourable facial profile. The treatment plan involved the distal movement of the maxillary posterior teeth, decrowding and incisor inclination correction. Palatal root movement was applied to the retroclined upper incisors by a novel cervical torque tie. The treatment was successfully completed after the distalisation of the dentition and palatal root movement of the upper incisors. However, following post-treatment cone-beam computed tomography, less bone coverage was evident on the palatal surface of the upper incisors. After a seven year follow-up, the treatment results were well maintained, and cortical bone regeneration was confirmed.
{"title":"A new torquing method for anterior tooth inclination control: a clinical report with a 7-year follow-up","authors":"Hyung-Kyu Noh, Ho-Jin Kim, Hyo-sang Park","doi":"10.2478/aoj-2023-0016","DOIUrl":"https://doi.org/10.2478/aoj-2023-0016","url":null,"abstract":"Abstract Appropriate orthodontic mechanotherapy, particularly in relation to incisor inclination control is a key consideration for successful treatment and the delivery of optimal aesthetics. A novel, easy, safe and effective torquing technique, termed Park’s cervical torque tie, has been devised. A female patient sought orthodontic treatment and presented with a Class II division 2 malocclusion with crowding but a favourable facial profile. The treatment plan involved the distal movement of the maxillary posterior teeth, decrowding and incisor inclination correction. Palatal root movement was applied to the retroclined upper incisors by a novel cervical torque tie. The treatment was successfully completed after the distalisation of the dentition and palatal root movement of the upper incisors. However, following post-treatment cone-beam computed tomography, less bone coverage was evident on the palatal surface of the upper incisors. After a seven year follow-up, the treatment results were well maintained, and cortical bone regeneration was confirmed.","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":"44815005","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}
Khaled Wafaie, H. Mohammed, Ahmed M. El Sergani, Ibtehal Almagrami, Ahmed G. Qaisi, Qiao Yiqiang
Abstract Objectives: The present research aimed to assess the accuracy and precision of the TheraMon® microsensor embedded in different thicknesses of Hawley retainers (HR) for comparison with vacuum formed retainers (VFR). Methods: Thirty microsensors contained within different thicknesses and composition of retainers were divided into three equal groups: Group A thick coverage HR (3 mm), Group B thin coverage HR (1 mm), and Group C VFR (1 mm). The microsensors were immersed in thermostatic water at a controlled temperature of 35°C, which corresponds to the average intra-oral temperature. After 1 week, data were gathered using the TheraMon® client software and analysed using ANOVA and Turkey’s HSD tests. Results: All TheraMon® microsensors were functional and produced uninterrupted recordings during the 1-week test period. Thermal detection differed between the three removable retainer groups. A near accurate thermostatic water detection was noticed with the thin HR with a mean temperature of 34.81 ± 0.04°C, followed by VFR 34.77 ± 0.09°C, and finally the thick HR 34.73 ± 0.05°C (ANOVA p-value = 0.025). A between-group comparison showed a significant mean difference (MD) between the thin and thick HR groups (MD: 0.08, p-value = 0.01). However, there were no significant differences between VFR and neither the thick Hawley (MD: 0.04, p-value = 0.27) nor the thin Hawley group (MD: -0.03, p-value = 0.39). Conclusion: A removable retainer’s variation in material thickness and composition could induce small but detectable changes in the precision of thermal detection by TheraMon® microsensors.
{"title":"Accuracy of thermal microsensors embedded in orthodontic retainers of different material composition and thickness: An in vitro study","authors":"Khaled Wafaie, H. Mohammed, Ahmed M. El Sergani, Ibtehal Almagrami, Ahmed G. Qaisi, Qiao Yiqiang","doi":"10.2478/aoj-2023-0005","DOIUrl":"https://doi.org/10.2478/aoj-2023-0005","url":null,"abstract":"Abstract Objectives: The present research aimed to assess the accuracy and precision of the TheraMon® microsensor embedded in different thicknesses of Hawley retainers (HR) for comparison with vacuum formed retainers (VFR). Methods: Thirty microsensors contained within different thicknesses and composition of retainers were divided into three equal groups: Group A thick coverage HR (3 mm), Group B thin coverage HR (1 mm), and Group C VFR (1 mm). The microsensors were immersed in thermostatic water at a controlled temperature of 35°C, which corresponds to the average intra-oral temperature. After 1 week, data were gathered using the TheraMon® client software and analysed using ANOVA and Turkey’s HSD tests. Results: All TheraMon® microsensors were functional and produced uninterrupted recordings during the 1-week test period. Thermal detection differed between the three removable retainer groups. A near accurate thermostatic water detection was noticed with the thin HR with a mean temperature of 34.81 ± 0.04°C, followed by VFR 34.77 ± 0.09°C, and finally the thick HR 34.73 ± 0.05°C (ANOVA p-value = 0.025). A between-group comparison showed a significant mean difference (MD) between the thin and thick HR groups (MD: 0.08, p-value = 0.01). However, there were no significant differences between VFR and neither the thick Hawley (MD: 0.04, p-value = 0.27) nor the thin Hawley group (MD: -0.03, p-value = 0.39). Conclusion: A removable retainer’s variation in material thickness and composition could induce small but detectable changes in the precision of thermal detection by TheraMon® microsensors.","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":"44739188","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 Objective The objective of this study was to assess the validity of the IOTN-AC in the assessment of aesthetic impairment in bimaxillary protrusion patients. Materials and methods A cross-sectional study was conducted and involved 110 patients comprising 52 males (47.3%) and 58 females (52.7%) who were accepted for fixed appliance treatment at The University of the West Indies Dental Hospital and provided consent for the use of their records. The mean age was 13.45 years. Participants were asked to complete a questionnaire regarding their reasons for seeking orthodontic treatment and score their self-perceived IOTN-AC. An orthodontist also scored the malocclusion using the IOTN (AC and DHC). Results Spearman’s correlation between patient IOTN-AC and orthodontist IOTN-AC was r = 0.435, (p < 0.001). However, the patient IOTN-AC and the ‘normative’ need (p = 0.198), as well as the orthodontist IOTN-AC and the ‘normative’ need (p = 0.334), were not correlated (r = 0.124 and r = 0.094, respectively). Both patient and the orthodontist IOTN-AC scores were not in agreement with ‘normative’ need (IOTN-DHC). Cohen’s kappa test determined an agreement between the patient’s IOTN- AC and an orthodontist’s IOTN AC score, k = 0.395, p < 0.001. The questionnaire revealed aesthetics as the primary reason for seeking treatment but there was poor correlation between the questionnaire items and the patient or orthodontist IOTN-AC score, an AC score of 3 being the most common score for both. Conclusion The IOTN-AC is not a valid tool to determine patient perception of the need for treatment in a bimaxillary protrusion population when scored by either patients or orthodontists.
{"title":"Applicability of the IOTN-AC index in a bimaxillary protrusion population","authors":"T. Hoyte, Anil Ali, D. Bearn","doi":"10.2478/aoj-2023-0010","DOIUrl":"https://doi.org/10.2478/aoj-2023-0010","url":null,"abstract":"Abstract Objective The objective of this study was to assess the validity of the IOTN-AC in the assessment of aesthetic impairment in bimaxillary protrusion patients. Materials and methods A cross-sectional study was conducted and involved 110 patients comprising 52 males (47.3%) and 58 females (52.7%) who were accepted for fixed appliance treatment at The University of the West Indies Dental Hospital and provided consent for the use of their records. The mean age was 13.45 years. Participants were asked to complete a questionnaire regarding their reasons for seeking orthodontic treatment and score their self-perceived IOTN-AC. An orthodontist also scored the malocclusion using the IOTN (AC and DHC). Results Spearman’s correlation between patient IOTN-AC and orthodontist IOTN-AC was r = 0.435, (p < 0.001). However, the patient IOTN-AC and the ‘normative’ need (p = 0.198), as well as the orthodontist IOTN-AC and the ‘normative’ need (p = 0.334), were not correlated (r = 0.124 and r = 0.094, respectively). Both patient and the orthodontist IOTN-AC scores were not in agreement with ‘normative’ need (IOTN-DHC). Cohen’s kappa test determined an agreement between the patient’s IOTN- AC and an orthodontist’s IOTN AC score, k = 0.395, p < 0.001. The questionnaire revealed aesthetics as the primary reason for seeking treatment but there was poor correlation between the questionnaire items and the patient or orthodontist IOTN-AC score, an AC score of 3 being the most common score for both. Conclusion The IOTN-AC is not a valid tool to determine patient perception of the need for treatment in a bimaxillary protrusion population when scored by either patients or orthodontists.","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":"41375126","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}
Seong-sik Kim, Youn-kyung Choi, Yong-il Kim, Soo-Byung Park, Sunghuen Kim
Abstract Objectives: This study aimed to compare the shear bond strength (SBS) related to surface treatment methods of debonded brackets before indirect rebonding and to evaluate changes in SBS related to sandblasting time. Methods: After brackets were debonded from a dental cast during an indirect bonding procedure, seven groups were assigned to conduct SBS tests. Sandblasted groups were sprayed with Al2O3 for 3 s (Group II), 6 s (Group III), 9 s (Group IV), and 12 s (Group V). In Group VI, a no. 4 round low-speed bur was used to remove resin. In Group VII, the bracket base was coated with a plastic conditioner (Reliance, IL, USA) and Group I served as the control group. Results: The SBS of Group VII was not statistically different from that of the control group. The SBS of Group VI was not statistically different from that of Group II but higher than that of the control group (P < 0.05). There was no statistical difference between Groups III, IV, and V, but was greater than the other groups (P < 0.05). Conclusion: The group with surface treatment by sandblasting for more than 6 sec prior to indirect bonding recorded a higher SBS than the other groups. The SBS did not increase further even if the sandblasting time increased by more than 9 sec.
摘要目的:本研究旨在比较间接再粘接前脱粘支架表面处理方法与剪切粘接强度(SBS)的关系，并评价SBS与喷砂时间的关系。方法:在间接粘接过程中，托槽从牙模上脱粘后，分配七组进行SBS测试。喷砂组分别喷Al2O3 3 s (II组)、6 s (III组)、9 s (IV组)、12 s (V组)。采用4型低速滚筒去除树脂。在第七组，支架底座涂有塑料调理剂(Reliance, IL, USA)，第一组为对照组。结果:第七组SBS与对照组比较，差异无统计学意义。第六组的SBS与第二组比较差异无统计学意义，但高于对照组(P < 0.05)。III、IV、V组间比较差异无统计学意义，但高于其他组(P < 0.05)。结论:间接粘接前表面喷砂处理超过6秒组的SBS高于其他组。即使喷砂时间增加9秒以上，SBS也没有进一步增加。
{"title":"Comparison of the shear bond strength of reconditioned metal brackets used in indirect bonding: an in vitro pilot study","authors":"Seong-sik Kim, Youn-kyung Choi, Yong-il Kim, Soo-Byung Park, Sunghuen Kim","doi":"10.2478/aoj-2023-0001","DOIUrl":"https://doi.org/10.2478/aoj-2023-0001","url":null,"abstract":"Abstract Objectives: This study aimed to compare the shear bond strength (SBS) related to surface treatment methods of debonded brackets before indirect rebonding and to evaluate changes in SBS related to sandblasting time. Methods: After brackets were debonded from a dental cast during an indirect bonding procedure, seven groups were assigned to conduct SBS tests. Sandblasted groups were sprayed with Al2O3 for 3 s (Group II), 6 s (Group III), 9 s (Group IV), and 12 s (Group V). In Group VI, a no. 4 round low-speed bur was used to remove resin. In Group VII, the bracket base was coated with a plastic conditioner (Reliance, IL, USA) and Group I served as the control group. Results: The SBS of Group VII was not statistically different from that of the control group. The SBS of Group VI was not statistically different from that of Group II but higher than that of the control group (P < 0.05). There was no statistical difference between Groups III, IV, and V, but was greater than the other groups (P < 0.05). Conclusion: The group with surface treatment by sandblasting for more than 6 sec prior to indirect bonding recorded a higher SBS than the other groups. The SBS did not increase further even if the sandblasting time increased by more than 9 sec.","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":"43070936","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}
Caio Luiz Bitencourt Reis, G. Marañón‐Vásquez, Mírian Aiko Nakane Matsumoto, F. Baratto-Filho, Maria Bernadete Sasso Stuani, P. Proff, C. Kirschneck, E. Küchler
Abstract Introduction: The present study aimed to determine the association between single nucleotide polymorphisms (SNPs) in RUNX2, SMAD6, BMP2, and BMP4 genes in relation to tooth-size discrepancy (TSD). Methods: A cross-sectional study of patients undergoing orthodontic treatment measured the mesiodistal width of permanent teeth from pretreatment dental casts. Sixty-two patients were included in the study and TSD was assessed according to the Bolton analysis. The patients were allocated into a control group (without a TSD), an anterior excess group and an overall excess group. Genomic DNA was extracted from saliva samples, and SNPs previously associated with tooth size were evaluated using a real-time polymerase chain reaction (PCR) system. The Fisher exact test was performed to compare genotype and allele frequencies at an α = 0.05. An Odds Ratio (OR) and 95% Confidence Interval (95% CI) were calculated. Results: The rs59983488 SNP in the RUNX2 gene was significantly related to the presence of anterior mandibular tooth-size excess in allele (T allele: p<0.001; OR = 11.74; 95% CI =2.61–55.80), and genotype models (GT genotype: p = 0.002; OR = 12.69; 95% CI = 2.47–64.83). The rs3934908 SNP in the SMAD6 gene was significantly associated with the presence of an overall maxillary tooth-size excess in allele (T allele: p < 0.001) and genotype models (TT genotype: p = 0.010). Conclusion: The present results suggest that SNPs in RUNX2 (rs59983488) and SMAD6 (rs3934908) genes may be associated with the presence of tooth-size excess.
{"title":"Single nucleotide polymorphisms in odontogenesis-related genes associated with tooth-size discrepancy","authors":"Caio Luiz Bitencourt Reis, G. Marañón‐Vásquez, Mírian Aiko Nakane Matsumoto, F. Baratto-Filho, Maria Bernadete Sasso Stuani, P. Proff, C. Kirschneck, E. Küchler","doi":"10.2478/aoj-2023-0008","DOIUrl":"https://doi.org/10.2478/aoj-2023-0008","url":null,"abstract":"Abstract Introduction: The present study aimed to determine the association between single nucleotide polymorphisms (SNPs) in RUNX2, SMAD6, BMP2, and BMP4 genes in relation to tooth-size discrepancy (TSD). Methods: A cross-sectional study of patients undergoing orthodontic treatment measured the mesiodistal width of permanent teeth from pretreatment dental casts. Sixty-two patients were included in the study and TSD was assessed according to the Bolton analysis. The patients were allocated into a control group (without a TSD), an anterior excess group and an overall excess group. Genomic DNA was extracted from saliva samples, and SNPs previously associated with tooth size were evaluated using a real-time polymerase chain reaction (PCR) system. The Fisher exact test was performed to compare genotype and allele frequencies at an α = 0.05. An Odds Ratio (OR) and 95% Confidence Interval (95% CI) were calculated. Results: The rs59983488 SNP in the RUNX2 gene was significantly related to the presence of anterior mandibular tooth-size excess in allele (T allele: p<0.001; OR = 11.74; 95% CI =2.61–55.80), and genotype models (GT genotype: p = 0.002; OR = 12.69; 95% CI = 2.47–64.83). The rs3934908 SNP in the SMAD6 gene was significantly associated with the presence of an overall maxillary tooth-size excess in allele (T allele: p < 0.001) and genotype models (TT genotype: p = 0.010). Conclusion: The present results suggest that SNPs in RUNX2 (rs59983488) and SMAD6 (rs3934908) genes may be associated with the presence of tooth-size excess.","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":"41643868","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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