Orthodontic Journal of Nepal最新文献

{"title":"Assessment of Maxillary First Molars Rotation in Class II malocclusion cases: A Cross Sectional Study","authors":"S. Maharjan, A. Rajbhandari, R. Pradhan, Manju Bajracharya, Bashu Dev Pant","doi":"10.3126/ojn.v12i2.49771","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.49771","url":null,"abstract":"Introduction: Determination of malocclusion including individual tooth malposition is crucial during diagnosis and treatment planning. Along with anteroposterior mal-relation, there is often the rotation of upper first molars in Class II cases. Rotated molars not only occupy more space than normally positioned molars but also increase the challenge for orthodontic treatment.\u0000Aims and objectives: This study aimed to determine the prevalence and extent of maxillary molar rotation in Class II division 1 and 2 malocclusion cases.\u0000Material and Methods: A total of 142 pretreatment maxillary casts of Class II malocclusion (71 division 1 and 71 division 2) cases were collected from the Department of Orthodontics of People's Dental College and Hospital. All the casts were scanned at a 1 200 dpi resolution with teeth touching the glass of the scanner (brother MFC-L2700DW model). Scanned pictures were then printed without any change in magnification. Measurement was made on those printed copies of casts. To determine the rotation and its severity a method developed by Ricketts (Line of Ricketts) was used. Descriptive analysis was carried out in Microsoft Excel 2013.\u0000Result: In Class II division 1 cases, 45 (63.4%) had right molar rotation and 47 (66.2%) had left molar rotation. In Class II division 2 cases, 33 (46.5%) had right molar rotation while 34 (47.9%) had left molar rotation. Similarly, the mean rotations of the right and left molars in division 1 were 6.24 mm and 6.77 mm respectively and those in division 2 were 4.82 mm and 4.94 mm respectively.\u0000Conclusion: The prevalence and extent of rotation of maxillary molars in Class II divisions 1 and 2 malocclusion cases were assessed in this study. Mesiopalatal rotation and left molar rotation were observed more commonly in both divisions.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45718837","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}

{"title":"Comparison of inter-radicular distance and buccal cortical bone thickness in Class I and Class II skeletal malocclusion patterns","authors":"Samikshya Sangroula, Ravi Kumar Mahto, Rajeev Mishra, Suja Shrestha, D. Kafle","doi":"10.3126/ojn.v12i2.51480","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.51480","url":null,"abstract":"Introduction: Knowledge of the safe zone of mini-implant placement guides clinicians in choosing where to place mini-implants. Several studies evaluated the safe zone for mini-implants placement, but only a very few previous studies have taken different skeletal patterns into account when assessing measurements.\u0000Objective: The purpose of this cross-sectional, comparative study was to compare the inter-radicular distance and buccal cortical bone thickness in Class I and Class II skeletal malocclusion patterns.\u0000Materials and Methods: A total of 62 CBCT images of patients with Class I and Class II skeletal malocclusion were obtained from the records of the department of Oral medicine and Radiology, Kathmandu University Teaching Hospital. The inter-radicular distance and buccal cortical bone thickness were measured at four different heights (2, 4, 6 and 8 mm) from the CEJ towards the apex. These measurements were measured between different skeletal pattern and gender with independent t-test. The intergroup comparison at different height from CEJ was done with ANOVAfollowed by Tukey's post-hoc test to see the difference within the category.\u0000Result: There was a statistically significant difference observed in the inter-radicular distance between the maxillary first and second premolars at a height of 6 mm between Class I and Class II malocclusion patterns (p = 0.03). There were differences observed in the inter-radicular distance of the mandible at a different height based on skeletal malocclusion pattern, which was not statistically significant (p > 0.05). The buccal cortical bone thickness between the maxillary central and lateral incisors at the height of 2 mm from CEJ between Class I and Class II skeletal malocclusion patterns was statistically significant (p = 0.01). The buccal cortical bone thickness of the mandible at different heights based on skeletal malocclusion pattern there were differences observed which were not statistically significant (p > 0.05).\u0000Conclusion: The inter-radicular distance and buccal cortical bone thickness could be influenced by different skeletal patterns and tend to increase from the CEJ to the apex in both Class I and Class II skeletal patterns.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42378110","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}

{"title":"Skeletal, Dentoalveolar and Soft tissue Components of Skeletal Class II Malocclusion among Nepalese Orthodontic Patients: A Cephalometric Study","authors":"Raju Shrestha, H. Halwai, S. Yadav, S. Gupta","doi":"10.3126/ojn.v12i2.48382","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.48382","url":null,"abstract":"Introduction: The understanding of the craniofacial morphology of skeletal Class II malocclusion is a key element in planning orthodontic treatment. The aim of this study was to describe various skeletal, dentoalveolar, and soft tissue components of skeletal Class II malocclusion in Nepalese orthodontic patients.\u0000Materials and Method: This cross-sectional study was carried out at the Universal College of Medical Sciences (UCMS) in the Department of Orthodontics and Dentofacial Orthopedics. Lateral cephalograms of 70 patients with skeletal class II malocclusion of age greater than 1 8 years, and ANB > 4°, were traced. Various skeletal, dentoalveolar, and softtissue measurements were taken. Descriptive statistics were performed followed by an independent sample t-test to find the difference in mean of various cephalometric parameters between males and females.\u0000Result: Among 70 subjects, 54 samples had class II div 1 malocclusion and 16 had class II div 2 malocclusion. Mandibular retrognathism was seen in 37 subjects having skeletal Class II Div 1 malocclusion and in 9 subjects with Class II Div 2 malocclusion. The mean value of SNA was 82.91 ° ± 2.87°, SNB was 76.81 ° ± 2.97°, and ANB was 6.11 ° ± 1.22° in Class II Div 1 subjects. In subjects with Class II Div 2, the mean value of SNA was 82.31 ° ± 3.19°, SNB was 76° ± 4.08°, and ANB was 5.44° ± 1.21 °. Mean value of U1 to NA degree and linear measurement was Class II div 1 was 28.30° ± 6.86° degree and 5.56 ± 2.76 mm respectively. Similarly, mean value of LI to NA degree and linear measurement was 31 .93° ± 5.96° and 6.16 ± 2.37 mm respectively. Mean and standard deviation value of upper lip to S-line and lower lip to S-line was 2.85 ± 2.1 3 mm and 3.54 ± 2.47 mm respectively in Class II Div 1 subjects. Similarly, in Class II Div 2 it was 1.50 ± 2.16 mm and 0.13 ± 2.66 mm respectively. Mean and standard deviation value of nasolabial angle was 93.69° ± 12.91° in Class II div 1 and 96.38° ± 12.26° degree in Class II Div 2. The mean values of most cephalometric parameters did not differ statistically between male and female subjects with Class II div 1  malocclusion.\u0000Conclusion: In subjects with skeletal Class II mean value of SNA was within normal range whereas SNB was decreased. Retrognathia and a small mandible in relation to the cranial base with a well-positioned maxilla were observed in the majority of subjects. Mean U1 to NA angular and linear measurement was increased in Class II Div 1, whereas they were decreased in Class II Div 2.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41809340","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}

{"title":"Chin-throat morphology of Nepalese adults with normal occlusion and aesthetic facial profile – a cephalometric study","authors":"Ravi Kumar Mahto, D. Kafle, Diwas Rai, Rabina Sakha, Nikita Rajbhandari","doi":"10.3126/ojn.v12i2.51048","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.51048","url":null,"abstract":"Objective(s): The present study was undertaken to obtain normative value for chin-throat morphology in Nepalese adult male and female adult subjects with normal occlusion and aesthetic facial profile and study variation of chinthroat morphology between the two sexes.\u0000Materials and Method: In this cross-sectional study, lateral cephalograms of adult subjects with normal occlusion and pleasing facial profiles were selected from the archives of the Department of Orthodontics, Dhulikhel Hospital, Kathmandu University School of Medical Sciences, Nepal. Manual tracing and measurement of 3 parameters evaluating chin-throat morphology i.e. lip-chin-throat angle, chin-throat length and chin-throat-neck angle were done. Descriptive analysis was carried out and Student’s t-test was used to find the difference in measurements between the male and female subjects.\u0000Result: The mean values of lip-chin-throat angle, chin-throat length and chin-throat-neck angle were 105.56 ± 8.69 degrees, 40.48 ± 5.95 mm and 121.69 ± 13.86 degrees respectively. The mean value of the lip-chin-throat angle was 106.09 ± 8.60 degrees in male subjects and 105.12 ± 8.92 degrees in female subjects. Similarly, the mean value of chin-throat length was 40.08 ± 5.39 mm for males and 40.80 ± 6.47 mm for females. Also, the mean value of the chinthroat-neck angle was found to be 121.14 ± 16.99 degrees for males and 122.16 ± 10.92 degrees for females.\u0000Conclusion: Normative values for chin-throat morphology of Nepalese adults were established. In addition to it, sexual dimorphism was observed for chin-throat morphology while comparing the mean values for male and female subjects. However, the differences were statistically insignificant.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48838452","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}

{"title":"Significance of Providing Index-based Accurate Treatment Time Estimates to Patients Before Orthodontic Treatment","authors":"Shama Samreen, Purva Joneja","doi":"10.3126/ojn.v12i2.43737","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.43737","url":null,"abstract":"Introduction: Orthodontic treatment duration has always been a topic of concern to patients and one of the aims of orthodontic treatment is to minimize the overall treatment time.\u0000Aim and Objective: To determine the benefits of providing index-based accurate treatment duration to patients before orthodontic treatment in practice management.\u0000Materials and Method: A cross-sectional questionnaire survey was the chosen method of research. A multiple choice and dichotomous question questionnaire was structured with 15 relevant questions to be filled in by the respondents to deduce the required information. The survey was circulated to 100 postgraduate students and orthodontists using various social media platforms who responded to the survey.\u0000Result: In general, young adults (51.0%) demanded the approximate treatment time before treatment and 50% of the clinicians provided an accurate estimate of treatment time to the patients before treatment. For simple orthodontic cases, PAR Score was the index of choice and for complex orthodontic cases, ABO-DI index was preferred.\u0000Conclusion: Accurate estimation of treatment duration before treatment resulted in highly motivated, happy and satisfied patients. It also saved the time and resources of orthodontists.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41818234","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}

{"title":"Condition-Specific Oral Health-Related Quality of Life (CS-OHRQoL) measures in Orthodontics- A Narrative Review","authors":"Elbe Peter, M. J","doi":"10.3126/ojn.v12i2.47883","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.47883","url":null,"abstract":"Outcomes pertaining to orthodontics can be either ‘disease’ outcome or ‘treatment’ outcome. The scales used for outcome assessment are usually the same for both and can be classified as generic or condition-specific. Generic scales are used in general for a variety of clinical conditions in dentistry, whereas condition-specific scales are used for specific problems like malocclusion. Due to the peculiar nature of orthodontic problems that do not fall into the definition of a disease, generic scales are of little use and condition-specific ones are recommended. The present article aims to provide a summary of the available condition-specific patient-reported outcome measures in orthodontics and perform a critical analysis of the same.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42200411","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}

{"title":"Comparative evaluation of smile attractiveness in various orthodontic treatment modalities- A cross-sectional study","authors":"Anjali Singh, A. Singla, A. Puri, S. Chaudhary, Anushri Dutta","doi":"10.3126/ojn.v12i2.38228","DOIUrl":"https://doi.org/10.3126/ojn.v12i2.38228","url":null,"abstract":"Background: Smile plays a significant role in facial attractiveness and social interactions. The present study aimed to evaluate the smile attractiveness in subjects treated with extraction or non-extraction orthodontic treatment modality.\u0000Materials and Methods: Frontal smiling photographs of 100 orthodontically treated subjects with an age range of 16-25 years were taken and divided into two groups each having 50 subjects. Group I (ANB 0° to 4° ) was subdivided into cases treated with extraction (group la) and without extraction (group lb). Similarly, Group II (ANB > 4°) was subdivided into cases treated with extraction (group lla) and without extraction (group lib). Smile esthetics and esthetic scores were assessed on frontal smile photographs by using different smile variables objectively and with the help of raters (10 laypersons,10 dental graduates, and 10 orthodontists) subjectively.\u0000Results: In extraction cases, the esthetic scores of dental practitioners and orthodontists were higher than in cases of non-extraction. Between extraction and non-extraction cases, laypeople had no esthetic preference. In Skeletal class I, smile variables such as the arch form index, smile arc and maxillary incisor show had a higher value in extraction cases however, the buccal corridor was more in non-extraction cases. In Skeletal Class II, smile variables such as the maxillary incisor show and arch form index were more in extraction cases and exposure of mandibular teeth was more in non-extraction cases. Judgement given by the raters was mainly based on maxillary incisor show, number of teeth displayed, and buccal corridor ratio. In orthodontic patients treated with and without the extraction, statistically non-significant variations in smile esthetics and esthetic scores were found.\u0000Conclusion: Thus, a decision regarding the extraction of teeth in orthodontic patients should not be solely based on smile esthetics but other factors which determine extraction should be considered.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45689110","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}

{"title":"Endodontic Considerations in Contemporary Orthodontic Practice- A Review","authors":"N. Acharya, R. Shrestha, Suvit Maskey, Rajiv Ratan Singh Yadav","doi":"10.3126/ojn.v12i1.47495","DOIUrl":"https://doi.org/10.3126/ojn.v12i1.47495","url":null,"abstract":"Introduction: With increase in number of adult orthodontic patients, the orthodontic- endodontic related patients are also expected to rise. There are number of clinical dilemma where both the specialties need robust guideline for clinical decision making. The effect of orthodontic force is expressed in different way in different patients and teeth which need to be understood by clinicians. On the contrary, the tooth movement of endodontically involved teeth demands careful evaluation of the tooth and its surrounding tissue, quality of root treatment, presence or absence of peri-apical pathologies, previous history of trauma etc. Management of external apical root resorption following orthodontic therapy might be challenging some time. Orthodontic extrusion of fractured teeth is one of the viable prosthetic rehabilitation options where orthodontic, endodontic and prosthodontics specialties are involved. So this review article will focus on reviewing current level of evidence on orthodontic- endodontic interface.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41351922","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}

{"title":"A Dilemma in Managing the Case with Missing Lateral Incisor","authors":"Sanjay Gupta","doi":"10.3126/ojn.v12i1.47479","DOIUrl":"https://doi.org/10.3126/ojn.v12i1.47479","url":null,"abstract":"No abstract available.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43447824","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}

{"title":"Finite Element Study to Compare Stress Distribution and Displacement in the Palatal Implant in Lingual Orthodontics in Four Different Combinations of Palatal Implant and Lever Arm","authors":"Ashish Kushwah, Mukesh Kumar, Shruti Premasagar, Sonika Sharma, Sumit Tomar, P. Bhushan","doi":"10.3126/ojn.v12i1.47481","DOIUrl":"https://doi.org/10.3126/ojn.v12i1.47481","url":null,"abstract":"Introduction: The choice of orthodontic appliance depends upon the patients age, profession and availability of them. Lingual orthodontic appliances are preferred over labial by patients because of its invisibility. The aim of this research is to compare the Von Mises stress distribution and displacement of palatal implants in the lingual orthodontic system among four different combinations of palatal implant and lever arm.\u0000Materials and Method: Four Finite element models were constructed for the bilaterally extracted first premolar maxillary arch. In all these models 0.018” slot lingual brackets were placed at the center of the clinical crown. A similar retraction force (150gm) was applied with the help of NiTi closed coil spring for all the models but the length of the lever arm vary as well as the palatal implant position also varies in these models. Finite element analysis was then performed to compare the Von Mises stress distribution, and displacement of the palatal implant using ANSYS 12.1 software.\u0000Result: In this study, displacement was the same (0.0005 mm) for all four models. Highest amount von mises stress was observed in Model 3 (3.4798 MPa) as a comparison to Model 1 (2.5442 MPa), Model 2 (2.5018 MPa), and Model 4 (3.3854 MPa). The stress value for the palatal implant was within the acceptable fatigue limit of the titanium of 193 MPa therefore all four models combination was safe for the clinical application.\u0000Conclusion: Double palatal implant systems were more effective in comparison to the single palatal implant system in lingual orthodontics. In this study, we found that the displacement of the palatal implants was not affected by the length of the lever-arm and the amount of stress was decreased when we increase the length of the lever-arm.","PeriodicalId":31197,"journal":{"name":"Orthodontic Journal of Nepal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41961484","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}