Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.045
Ajit J Kalia, Juhi Joshi, Mohammed Mandsaurwala, Sayali Bobade, Azmat Azha Khan
To test the difference in loading and unloading forces delivered by six coated nickel-titanium wires and their non-coated equivalents. Commercially available six coated nickel-titanium wires and their non-coated equivalents of sizes 0.016-inch diameter round and 0.016 X 0.022-inch rectangular cross-section were procured. The wires were evaluated using a three-point bending test based on the method in ISO Standard 15841. No statistically significant differences in force values were found between coated and non-coated wires, listed by deflection in three-point bending, for these specific groups.Statistical analysis was done using SPSS version 11.5 (Chicago, III). Analysis of variance was performed with Sheffe post hoc for the mean comparison among the measurements of each loading and unloading deflection for coated and non-coated wires. Student’s t-tests was performed for the mean comparisons between non coated and coated groups for each deflection. There is no significant difference in load response between coated and non-coated nickel-titanium wires of the same size when subjected to the same deflection using a standard three-point bend test method.
测试六根涂覆镍钛线和未涂覆镍钛线所产生的载荷和卸载力的差异。市售的六根涂覆镍钛线及其未涂覆的等价物直径为0.016英寸的圆形和0.016 X 0.022英寸的矩形截面。使用基于ISO标准15841方法的三点弯曲试验对钢丝进行评估。在这些特定组中，根据三点弯曲挠度列出的涂覆和非涂覆导线之间的力值没有统计学上的显着差异。使用SPSS 11.5 (Chicago, III)进行统计分析。使用Sheffe post hoc进行方差分析，对涂覆和非涂覆导线每次加载和卸载挠度的测量值进行平均值比较。对每次偏转的非涂覆组和涂覆组之间的平均比较进行学生t检验。采用标准三点弯曲试验方法，相同尺寸的涂覆镍钛线与未涂覆镍钛线在受到相同挠度时的负载响应无显著差异。
{"title":"Esthetic nickel titanium wires– Do they deliver the same force?","authors":"Ajit J Kalia, Juhi Joshi, Mohammed Mandsaurwala, Sayali Bobade, Azmat Azha Khan","doi":"10.18231/j.ijodr.2022.045","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.045","url":null,"abstract":"To test the difference in loading and unloading forces delivered by six coated nickel-titanium wires and their non-coated equivalents. Commercially available six coated nickel-titanium wires and their non-coated equivalents of sizes 0.016-inch diameter round and 0.016 X 0.022-inch rectangular cross-section were procured. The wires were evaluated using a three-point bending test based on the method in ISO Standard 15841. No statistically significant differences in force values were found between coated and non-coated wires, listed by deflection in three-point bending, for these specific groups.Statistical analysis was done using SPSS version 11.5 (Chicago, III). Analysis of variance was performed with Sheffe post hoc for the mean comparison among the measurements of each loading and unloading deflection for coated and non-coated wires. Student’s t-tests was performed for the mean comparisons between non coated and coated groups for each deflection. There is no significant difference in load response between coated and non-coated nickel-titanium wires of the same size when subjected to the same deflection using a standard three-point bend test method.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689577","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.049
A. Kamboj, S. Chopra, Atul Bali, Amit Jain, Deepak Chauhan
All over the world Class II malocclusions affects twenty percent of the population and Class II division 1 malocclusion is thought to be the most recognized problem practiced in orthodontics. A wide range of functional appliances including the removal and fixed are available for the correction of Class II skeletal pattern. The fixed functional appliances eliminate the need for patient compliance and place the treatment outcome under the control of the orthodontist. Patients with Class II mandibular retrusion and those whose growth is about to finish are typically treated with fixed functional appliances, which require little maintenance. William Vogt, was the first to introduce the Forsus appliance. Fixed functional appliances in general and the Forsus (FRD) in particular considerably speed up the correction of Class II Division 1 malocclusions and shorten treatment time as they are used in conjunction with a fully bonded fixed orthodontic appliance. Forsus primarily achieves Class II correction through dentoalveolar effects, but if utilized by patients who are at or near pubertal growth, it can result in skeletal changes as well.In this article, the management of two young adult patients with Class II Division 1 malocclusion and mandibular retrognathism is discussed. Both patients received a two-phase therapy in which first phase involved alignment of the arches with fixed orthodontic pre-adjusted appliance and second phase involved using the Forsus fixed functional appliance for at least six months.
{"title":"Correction of Class-II malocclusion in young adults using fixed functional appliances (Forsus) - A case series","authors":"A. Kamboj, S. Chopra, Atul Bali, Amit Jain, Deepak Chauhan","doi":"10.18231/j.ijodr.2022.049","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.049","url":null,"abstract":"All over the world Class II malocclusions affects twenty percent of the population and Class II division 1 malocclusion is thought to be the most recognized problem practiced in orthodontics. A wide range of functional appliances including the removal and fixed are available for the correction of Class II skeletal pattern. The fixed functional appliances eliminate the need for patient compliance and place the treatment outcome under the control of the orthodontist. Patients with Class II mandibular retrusion and those whose growth is about to finish are typically treated with fixed functional appliances, which require little maintenance. William Vogt, was the first to introduce the Forsus appliance. Fixed functional appliances in general and the Forsus (FRD) in particular considerably speed up the correction of Class II Division 1 malocclusions and shorten treatment time as they are used in conjunction with a fully bonded fixed orthodontic appliance. Forsus primarily achieves Class II correction through dentoalveolar effects, but if utilized by patients who are at or near pubertal growth, it can result in skeletal changes as well.In this article, the management of two young adult patients with Class II Division 1 malocclusion and mandibular retrognathism is discussed. Both patients received a two-phase therapy in which first phase involved alignment of the arches with fixed orthodontic pre-adjusted appliance and second phase involved using the Forsus fixed functional appliance for at least six months.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116968300","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.043
Sushmita Batni, V. Shetty, Taher Manasawala, Devashree Mujumdar
To evaluate the torque expression of right permanent maxillary central incisor with varying bracket positions and to compare the torque expression of the same tooth with different crown-root angulations. Finite Element Models of Maxillary Central Incisor were used for simulation of torque expression with various crown-root angles. Three FEM models of a Maxillary Central Incisor with different crown-root angles (170˚,175˚,180˚, and 165°) were constructed with varying bracket heights and subjected to a 30° labial root torque and the resultant torque expressions were evaluated. The model with the maximum variation in crown-root angle (165˚) showed the maximum torque expression at 6mm and minimum at 3mm bracket height while the model with a minimum variation in crown-root angle (180°) showed the minimum torque expression both and 3mm and 6mm bracket height. With increase in the crown-root angles of a tooth, the torque expression away from the incisal edge increases.
{"title":"Evaluation of torque expression with varied bracket positions and varying crown-root angles of maxillary central incisor – A 3 dimensional finite element study","authors":"Sushmita Batni, V. Shetty, Taher Manasawala, Devashree Mujumdar","doi":"10.18231/j.ijodr.2022.043","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.043","url":null,"abstract":"To evaluate the torque expression of right permanent maxillary central incisor with varying bracket positions and to compare the torque expression of the same tooth with different crown-root angulations. Finite Element Models of Maxillary Central Incisor were used for simulation of torque expression with various crown-root angles. Three FEM models of a Maxillary Central Incisor with different crown-root angles (170˚,175˚,180˚, and 165°) were constructed with varying bracket heights and subjected to a 30° labial root torque and the resultant torque expressions were evaluated. The model with the maximum variation in crown-root angle (165˚) showed the maximum torque expression at 6mm and minimum at 3mm bracket height while the model with a minimum variation in crown-root angle (180°) showed the minimum torque expression both and 3mm and 6mm bracket height. With increase in the crown-root angles of a tooth, the torque expression away from the incisal edge increases.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132500765","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.044
Komal Kailash Mantri, Uroosa Aymen, Anilkumar N Biradar
Fixed orthodontic treatment has a lot of benefits for the patients, but it is not without any potential risks. The most common side effect of orthodontic treatment with fixed appliances is in the form of incipient caries lesions around brackets and which is mainly due to limitation on self-cleansing mechanism. To evaluate the effect of Er, Cr: YSGG laser irradiation and CPP-ACP paste used alone or in combination on the surface microhardness of enamel adjacent to orthodontic brackets.Initially starting with bonding brackets to each tooth and making acrylic resin blocks. Then LASER irradiation with appropriate settings was performed.200 non-carious extracted human maxillary first premolars were bonded by metal brackets and were tested for microhardness on Vickers machine. They were randomly divided into 5 groups followed by treated with different caries prevention methods, then subjected to PH cycling model. All teeth were tested for surface microhardness in a 3mmx3mm area surrounding the orthodontic bracket. The mean VHN value of all the groups were found to be highly statistically significant. The highest mean VHN value was found in the group 5 followed by group 2, group 3 and group 4 and least mean VHN in group 1.Combination of ER, CR:YSGG laser irradiation and CPP-ACP paste shows a highly effective preventive measure for white spot lesion. LASER irradiation with specific guidelines as followed m in this study is a more effective preventive measure as compared to CPP-ACP Paste application followed at regular intervals.
{"title":"Comparative evaluation of surface microhardness of enamel adjacent to orthodontic brackets when treated with CPP-ACP paste and Er, Cr: YSGG laser irradiation: An in vitro study","authors":"Komal Kailash Mantri, Uroosa Aymen, Anilkumar N Biradar","doi":"10.18231/j.ijodr.2022.044","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.044","url":null,"abstract":"Fixed orthodontic treatment has a lot of benefits for the patients, but it is not without any potential risks. The most common side effect of orthodontic treatment with fixed appliances is in the form of incipient caries lesions around brackets and which is mainly due to limitation on self-cleansing mechanism. To evaluate the effect of Er, Cr: YSGG laser irradiation and CPP-ACP paste used alone or in combination on the surface microhardness of enamel adjacent to orthodontic brackets.Initially starting with bonding brackets to each tooth and making acrylic resin blocks. Then LASER irradiation with appropriate settings was performed.200 non-carious extracted human maxillary first premolars were bonded by metal brackets and were tested for microhardness on Vickers machine. They were randomly divided into 5 groups followed by treated with different caries prevention methods, then subjected to PH cycling model. All teeth were tested for surface microhardness in a 3mmx3mm area surrounding the orthodontic bracket. The mean VHN value of all the groups were found to be highly statistically significant. The highest mean VHN value was found in the group 5 followed by group 2, group 3 and group 4 and least mean VHN in group 1.Combination of ER, CR:YSGG laser irradiation and CPP-ACP paste shows a highly effective preventive measure for white spot lesion. LASER irradiation with specific guidelines as followed m in this study is a more effective preventive measure as compared to CPP-ACP Paste application followed at regular intervals.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125801683","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.047
Sushmita Batni Rao, V. Shetty, Taher Manasawala, Devashree Mujumdar
A wide range of clinical procedures have been introduced and practiced to correct mesially inclined mandibular molars which is a common situation among young adults, occurring usually due to inadequate space in the arch for its eruption. There are two major treatment options available for the correction of impacted / partially impacted molars and this depends on several factors. The objective was to treat a 15-year-old male patient having a lower right partially impacted 2nd molar using skeletal anchorage system. The lower right 3 molar was surgically excised, and the partially impacted 2 molar was uprighted using an orthodontic miniscrew which was placed between lower right 1 and 2 premolars on the mesial side. The use of skeletal anchorage system has an excellent advantage over conventional methods since there is prevention of unwanted movement of anchor teeth leading to successful correction without any delay in the treatment duration.
{"title":"Orthodontic miniscrew supported correction of partially impacted mandibular 2nd molar- A case report","authors":"Sushmita Batni Rao, V. Shetty, Taher Manasawala, Devashree Mujumdar","doi":"10.18231/j.ijodr.2022.047","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.047","url":null,"abstract":"A wide range of clinical procedures have been introduced and practiced to correct mesially inclined mandibular molars which is a common situation among young adults, occurring usually due to inadequate space in the arch for its eruption. There are two major treatment options available for the correction of impacted / partially impacted molars and this depends on several factors. The objective was to treat a 15-year-old male patient having a lower right partially impacted 2nd molar using skeletal anchorage system. The lower right 3 molar was surgically excised, and the partially impacted 2 molar was uprighted using an orthodontic miniscrew which was placed between lower right 1 and 2 premolars on the mesial side. The use of skeletal anchorage system has an excellent advantage over conventional methods since there is prevention of unwanted movement of anchor teeth leading to successful correction without any delay in the treatment duration.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134535721","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.037
A. Kamboj
{"title":"Orthodontics & obstructive sleep apnea","authors":"A. Kamboj","doi":"10.18231/j.ijodr.2022.037","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.037","url":null,"abstract":"","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117187384","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.046
Deepak Chandra, Rohit Khanna, S. Verma, R. Maurya, K. Srivastava, T. Tikku
Various types of appliances have been tried by the Orthodontists for the fixed orthodontic treatment. Irrespective of the appliance used the main goal of retraction of anterior teeth in extraction cases is to keep the vertical dimension stable so as not to allow downward and backward rotation of mandible. The aim of this study was to compare changes in mandibular rotation following fixed orthodontic treatment on subjects who have undergone extraction of all first premolars. Pre and post treatment lateral cephalogram of 25 subjects were taken (13 females and 12 males), aged 18-25 years and the tracings were done using Nemoceph software. Parameters assessed were facial height (anterior and posterior), mandibular plane angle (FMA & SN-GoGn), and Jaraback ratio. Student t-test was used to make statistical comparison. Mean difference of SN-GoGn(0.15 ±0.07), FMA(0.23 ±0.52), Anterior facial height(0.18±0.01) and posterior height(0.45±0.01) and Jaraback ratio(0.47±0.32) did not show statistically significant difference between pre and post treatment. Mandibular plane did not alter during treatment. When adequate mechanics is followed during treatment desirable treatment outcome with insignificant alteration of mandibular plane can be achieved.
{"title":"Effect of premolar extraction on mandibular rotation","authors":"Deepak Chandra, Rohit Khanna, S. Verma, R. Maurya, K. Srivastava, T. Tikku","doi":"10.18231/j.ijodr.2022.046","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.046","url":null,"abstract":"Various types of appliances have been tried by the Orthodontists for the fixed orthodontic treatment. Irrespective of the appliance used the main goal of retraction of anterior teeth in extraction cases is to keep the vertical dimension stable so as not to allow downward and backward rotation of mandible. The aim of this study was to compare changes in mandibular rotation following fixed orthodontic treatment on subjects who have undergone extraction of all first premolars. Pre and post treatment lateral cephalogram of 25 subjects were taken (13 females and 12 males), aged 18-25 years and the tracings were done using Nemoceph software. Parameters assessed were facial height (anterior and posterior), mandibular plane angle (FMA & SN-GoGn), and Jaraback ratio. Student t-test was used to make statistical comparison. Mean difference of SN-GoGn(0.15 ±0.07), FMA(0.23 ±0.52), Anterior facial height(0.18±0.01) and posterior height(0.45±0.01) and Jaraback ratio(0.47±0.32) did not show statistically significant difference between pre and post treatment. Mandibular plane did not alter during treatment. When adequate mechanics is followed during treatment desirable treatment outcome with insignificant alteration of mandibular plane can be achieved.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115109886","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.038
Karthik Sennimalai, Madhanraj Selvaraj
The study models are regarded as the gold standard tool in orthodontics since they aid in the diagnosis, treatment planning and monitoring of the changes that may occur throughout treatment. Besides these, plaster models are also used to monitor growth and clinical audits. A study model accurately replicates the teeth, surrounding soft tissues and occlusion. Traditionally, the orthodontic study models have been used to measure the overjet and overbite, tooth size, arch length, arch width, the curve of Wilson and Spee, space analysis and diagnostic setup. However, plaster models are still preferred by orthodontists since impression-making is convenient, and most patients tolerate them well. With recent advancements in digital technology, intraoral scanners have eliminated the need for conventional impression procedures and plaster models. The digital orthodontic models have overcome the majority of disadvantages associated with plaster models. With the advent of automated analysis using digital models, the entire process of orthodontic treatment planning based on study models has become more convenient and user-friendly. This article aims to comprehend the various model analyses used for diagnosis and treatment planning in the permanent dentition stage and deliver insight into current digital methods.
{"title":"Orthodontic model analysis in the permanent dentition: A review of past, and current methods","authors":"Karthik Sennimalai, Madhanraj Selvaraj","doi":"10.18231/j.ijodr.2022.038","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.038","url":null,"abstract":"The study models are regarded as the gold standard tool in orthodontics since they aid in the diagnosis, treatment planning and monitoring of the changes that may occur throughout treatment. Besides these, plaster models are also used to monitor growth and clinical audits. A study model accurately replicates the teeth, surrounding soft tissues and occlusion. Traditionally, the orthodontic study models have been used to measure the overjet and overbite, tooth size, arch length, arch width, the curve of Wilson and Spee, space analysis and diagnostic setup. However, plaster models are still preferred by orthodontists since impression-making is convenient, and most patients tolerate them well. With recent advancements in digital technology, intraoral scanners have eliminated the need for conventional impression procedures and plaster models. The digital orthodontic models have overcome the majority of disadvantages associated with plaster models. With the advent of automated analysis using digital models, the entire process of orthodontic treatment planning based on study models has become more convenient and user-friendly. This article aims to comprehend the various model analyses used for diagnosis and treatment planning in the permanent dentition stage and deliver insight into current digital methods.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129608302","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.039
Gulnaz Husain, A. Nagar
Human growth hormone (Somatotropin) is produced by acidophilic growth hormone cells in the anterior pituitary gland, stimulated by hypothalamus. Its production is regulated by several complex feedback mechanisms in response to stress, exercise, diet, sleep and growth hormone itself. Growth hormone plays a major role in linear body growth and craniofacial growth. In Orthodontics, it induces orthodontic tooth movement by activating specific cytokines to regulate osteoclast & osteoblast activity. It mediates STAT signalling in liver & pancreas to produce JAK-IGF-1. IGF-1 has stimulatory effects on osteoblasts and chondrocytes for endochondral ossification to promote bone growth. Growth hormone mediates mitogenic stimulus to odontoblast lineage cells by epidermal growth factor (EGF) to differentiate into odontoblasts. It also stimulates production of alkaline phosphatase and osteocalcin in osteoblasts to improve osteoblast proliferation and differentiation. It also induces osteoclastic activity indirectly by production of IGF-1 and IL- 6 thereby activating RANK-RANKL/OPG phenomenon. It also promotes myofibrillar diameter expansion so it increases muscle mass with strength. Growth Hormone Replacement therapy reduces facial convexity and its main effect appears to be on condylar growth. Since deficiencies of growth hormone can adversely affect orthodontic treatment, effects of growth hormone treatment on craniofacial structures should be considered in order to maximize the effectiveness of orthodontic treatment with appliances and it is more important to understand.
{"title":"Role of growth hormone in orthodontics","authors":"Gulnaz Husain, A. Nagar","doi":"10.18231/j.ijodr.2022.039","DOIUrl":"https://doi.org/10.18231/j.ijodr.2022.039","url":null,"abstract":"Human growth hormone (Somatotropin) is produced by acidophilic growth hormone cells in the anterior pituitary gland, stimulated by hypothalamus. Its production is regulated by several complex feedback mechanisms in response to stress, exercise, diet, sleep and growth hormone itself. Growth hormone plays a major role in linear body growth and craniofacial growth. In Orthodontics, it induces orthodontic tooth movement by activating specific cytokines to regulate osteoclast & osteoblast activity. It mediates STAT signalling in liver & pancreas to produce JAK-IGF-1. IGF-1 has stimulatory effects on osteoblasts and chondrocytes for endochondral ossification to promote bone growth. Growth hormone mediates mitogenic stimulus to odontoblast lineage cells by epidermal growth factor (EGF) to differentiate into odontoblasts. It also stimulates production of alkaline phosphatase and osteocalcin in osteoblasts to improve osteoblast proliferation and differentiation. It also induces osteoclastic activity indirectly by production of IGF-1 and IL- 6 thereby activating RANK-RANKL/OPG phenomenon. It also promotes myofibrillar diameter expansion so it increases muscle mass with strength. Growth Hormone Replacement therapy reduces facial convexity and its main effect appears to be on condylar growth. Since deficiencies of growth hormone can adversely affect orthodontic treatment, effects of growth hormone treatment on craniofacial structures should be considered in order to maximize the effectiveness of orthodontic treatment with appliances and it is more important to understand.","PeriodicalId":269485,"journal":{"name":"IP Indian Journal of Orthodontics and Dentofacial Research","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124589676","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}
Pub Date : 2022-12-15DOI: 10.18231/j.ijodr.2022.041
Rohan Jacob Sam, Vaibhav Mishra, A. Yadav, Deepanshi Yadav, Divya Joshi, Kshetrimayum Martina
: Elastomeric chain is one of the most commonly used orthodontic material, Evaluating the force transmission ability of elastomeric chains is essential so that orthodontists can estimate the actual force transferred to the dentition. The aim of this study was to assess effect of chlorhexidine mouth rinse on force decay of continuous, short and long elastomeric chain in chlorhexidine mouth wash. : The sample consisted three commercially available Orthodontic elastomeric chain (American Orthodontics, clear) such as continuous, short and long. These elastomeric chains were analysed with one experimental group and one control group. In control group all the three types of chain were dipped in distilled water for 30 second every day while in experimental group these elastomeric chains were dipped in mouth wash (Clohex Mouth Wash ADS) for 30 second every day. The result was tested by digital dynamometer and was statistically evaluated using ANOVA test. : Continuous elastomeric chain showed least force decay in both experimental and control group throughout the study. In the inter group comparison there was significant difference of force decay between elastomeric chains with the control group and experimental group in the 3 week in both continuous and short elastomeric chain, experimental group showed more force decay.: Mouthwash does not accelerate force degradation of elastomeric chains which could clinically affect their effectiveness. However, the results could be variable in the presence of other biological factors in the oral environment and their interactions between oral microorganisms with the host.
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