Risk Factors of Composite Attachment Loss During Orthodontic Clear Aligner Therapy

2020 ◽  
Author(s):  
Yaosen Chen ◽  
Mohamed AM ◽  
WANG Jinbo ◽  
ZHENG Ziwei ◽  
Maher Al-balaa ◽  
...  
Keyword(s):  
Risk Factors ◽  
Daily Practice ◽  
Multivariable Logistic Regression Analysis ◽  
Chi Square ◽  
Attachment Loss ◽  
Wear Time ◽  
Related Risk ◽  
Potential Risk Factors ◽  
Chi Square Test ◽  
Clear Aligner

Abstract Background The composite attachment loss during orthodontic clear aligner therapy is an adverse event that commonly happens in our daily practice. However, there is a lack of related statistical analysis, and studies analyzing the related risk factors. Therefore, the aim of this study is to assess the incidence of attachment loss during orthodontic clear aligner therapy and to identify rick factors that may predict such event.Methods The demographics and clinical variables of 94 patients undergoing clear aligner therapy (27 males and 67 females; average age: 27.60± 0.86 years) were recorded. Both patient-related and tooth-related attachment loss was recorded. The chi-square test and logistic regressive analysis were applied to identify the potential risk factors. SPSS for Mac (version 23.0, IBM, USA) was used for statistical analyses. P＜0.05 was considered statistically significant. Results Our study suggested that the risk factors for attachment loss include: frequent aligner removal (>= 5 times a day) (losing rate=60.0%, P=0.005); aligner wear time less than 18 hours a day (losing rate=50.8%, P=0.014); eating without aligners inserted (losing rate=47.9%, P=0.034); utilizing aligner tray seaters (losing rate=48.2%, P=0.006) and unilateral mastication (losing rate=52.1%, P=0.002). The multivariable logistic regression analysis indicates that aligner wear time less than 18 hours a day (P=0.020, B=0.925), using aligner tray seaters (P=0.007, B=1.168) and unilateral mastication (P=0.034, B=-0.458) were considered independent factors that can predict the composite attachment loss in orthodontic clear aligner therapy.Conclusion Wearing aligner less than 18 hours a day, using aligner tray seaters and unilateral mastication may contribute to increased incidence of composite attachment loss during orthodontic clear aligner therapy.

scholarly journals Risk Factors of Composite Attachment Loss in Orthodontic Patients during Orthodontic Clear Aligner Therapy: A Prospective Study

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Chen Yaosen ◽  
A. M. Mohamed ◽  
Wang Jinbo ◽  
Zheng Ziwei ◽  
Maher Al-balaa ◽  
...  
Keyword(s):  
Risk Factors ◽  
Daily Practice ◽  
Multivariable Logistic Regression Analysis ◽  
Attachment Loss ◽  
Wear Time ◽  
Related Risk ◽  
Chi Squared ◽  
Potential Risk Factors ◽  
A Prospective Study ◽  
Clear Aligner

Background. The composite attachment loss during orthodontic clear aligner therapy is an adverse event that commonly happens in our daily practice. However, there is a lack of related statistical analysis and studies analyzing the related risk factors. Therefore, the aim of this study is to assess the incidence of attachment loss during orthodontic clear aligner therapy and to identify rick factors that may predict such event. Materials and Methods. The demographics and clinical variables of 94 patients undergoing clear aligner therapy (27 males and 67 females; average age: 27.60 ± 0.86   years ) were recorded. Both patient-related and tooth-related attachment loss was recorded. The chi-squared test and logistic regressive analysis were applied to identify the potential risk factors. SPSS for Mac (version 23.0, IBM, USA) was used for statistical analyses. P < 0.05 was considered statistically significant. Results. Our study suggested that the risk factors for attachment loss include frequent aligner removal (≥ 5 times a day) ( losing   rate = 60.0 % , P = 0.005 ), aligner wear time less than 18 hours a day ( losing   rate = 50.8 % , P = 0.014 ), eating without aligners inserted ( losing   rate = 47.9 % , P = 0.034 ), utilizing aligner tray seaters ( losing   rate = 48.2 % , P = 0.006 ), and unilateral mastication ( losing   rate = 52.1 % , P = 0.002 ). The multivariable logistic regression analysis indicates that aligner wear time less than 18 hours a day ( P = 0.020 , B = 0.925 ), using aligner tray seaters ( P = 0.007 , B = 1.168 ), and unilateral mastication ( P = 0.034 , B = − 0.458 ) were considered independent factors that can predict the composite attachment loss in orthodontic clear aligner therapy. Conclusion. Wearing aligner less than 18 hours a day, using aligner tray seaters, and unilateral mastication may contribute to increased incidence of composite attachment loss during orthodontic clear aligner therapy.

scholarly journals Influence of Physical and Musculoskeletal Factors on Occupational Injuries and Accidents in Korean Workers Based on Gender and Company Size

2019 ◽  
Vol 16 (3) ◽  
pp. 345 ◽  
Author(s):  
Sang Park ◽  
Myunghwan Jung ◽  
Joo Sung
Keyword(s):  
Risk Factors ◽  
Occupational Safety ◽  
Occupational Injuries ◽  
Company Size ◽  
Chi Square ◽  
Repetitive Tasks ◽  
Related Risk ◽  
Chi Square Test ◽  
Awkward Posture ◽  
Vibration Noise

Though the overall incidence of occupational injuries and accidents has decreased, they continue to happen. Many associated factors are known and managing them with limited resources is difficult. This study evaluates related risk factors and prioritizes their management for reducing occupational injuries and accidents at the workplace. We used data from the 4th Korean Working Condition Survey conducted by the Korea Occupational Safety Health Research Institute from June to September 2014. A total of 14,381 persons (9776 men, 4605 women) were selected; t-test, chi-square test, and logistic regression analyses were performed to analyze data. The influence of physical (vibration, noise, abnormal temperature) and musculoskeletal (awkward posture, handling of heavy objects, repetitive tasks) factors was compared according to gender and company size. The risk of occupational injuries and accidents among men was related to musculoskeletal factors and vibration in companies with “under 50” employees and with awkward posture, vibration, and noise in companies with “50 or above” employees; however, among women in companies with “under 50” employees, it was associated with only vibration. Although we evaluated only a few risk factors, prioritizing them based on gender and company size has provided new valuable information.

Risk factors for sporadic pancreatic neuroendocrine tumors (PNETs): Updated results from a single-center case control study.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e14594-e14594
Author(s):  
Thorvardur Ragnar Halfdanarson ◽  
William R Bamlet ◽  
Robert R. McWilliams ◽  
Timothy J. Hobday ◽  
Patrick A. Burch ◽  
...  
Keyword(s):  
Risk Factors ◽  
Alcohol Use ◽  
Smoking History ◽  
Categorical Variables ◽  
Continuous Variables ◽  
Chi Square ◽  
Region Of Residence ◽  
Potential Risk Factors ◽  
Chi Square Test ◽  
History Of

e14594 Background: PNETs are uncommon malignancies and little is known about risk their factors and association with other cancers. Our aim was to evaluate smoking, alcohol use, personal history of diabetes and a family history of PNET and other cancers as potential risk factors. Methods: PNET cases seen at Mayo Clinic Rochester from 2000 to 2011 were evaluated. Insulinoma and high-grade PNETs were excluded. Primary care patients served as controls and were matched (2:1 ratio) to cases on age, sex and region of residence. Cases and controls completed questionnaires at the time of evaluation. Categorical variables were compared with the chi-square test; continuous variables were compared using a two-sample t test. Results: 355 cases were evaluated, mean age was 56.6 years, 52% were males and 96% were White. Personal smoking history was not associated with PNETs (cases 51%, controls 47%, p=0.24). Ever-alcohol use was less common among cases (54% vs. 67%, p=0.001). 19% of cases reported a history of diabetes compared with 11% of controls (p<0.001). Cases were more likely than controls to report a family member with sarcoma (p=0.02), PNET (p=0.024), gall bladder cancer (p=0.024), ovarian cancer (p=0.04) and stomach cancer (p=0.01). Conclusions: Cases with PNETs were more likely than controls to report a history of diabetes and less likely to report alcohol use. There was no association with smoking. Several types of cancer were more commonly reported in family members of cases than controls.

scholarly journals PREVALENCE AND RISK FACTORS OF HOOKWORMS INFECTION ON DOGS IN SUKABUMI REGENCY, WEST JAVA PROVINCE, INDONESIA

2020 ◽  
Vol 14 (4) ◽  
pp. 85-89
Author(s):  
Yusuf Ridwan ◽  
Ardilasunu Wicaksono ◽  
Siti Vanessa Fransiska ◽  
Princesse Theresa
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Cross Sectional Study ◽  
High Risk Group ◽  
Parasitic Infections ◽  
Land Area ◽  
Chi Square ◽  
Cross Sectional ◽  
Related Risk ◽  
Chi Square Test

Hookworms infection remains as an important parasitic infections affecting animal and human health worldwide. However, information on the prevalence and the risk factors of hookworm infection on dogs in Indonesia is very limited. A cross sectional study to estimate the prevalence and to identify risk factors of hookworms infection on dogs was conducted in rural area with different topography, Sukabumi Regency, Indonesia. A Total of 204 dog stool specimens were examined for hookworm eggs using simple flotation methods. The data of related risk factors namely type of topography area (high and low land), purpose of having dog, dog demography, dog reared management and deworming were collected through dog owners interview’s with completed a questionnaire. Those data were analyzed using the chi-square test (χ2) and logistic regression. The prevalence of hookworm on dogs in Sukabumi was 24.5 % (95% Confidence Interval [CI]=19.1-30.8). This prevalence was associated with topography of the area, the age of dog, and type of dog keeping methods. The prevalence of hookworms was higher in the high land area than low land area (OR=5.935, 95% CI=2.764-12.744 ). Logistic regression identified pupies as a high risk group to hookworms infection (OR= 2.041, 95%CI=1.035-4.055). The dog which kept in the cage/tied had higher risk than free roaming dog (OR=3.66, 95%CI=1.479-9.091).Key words: Dog, hookworms, prevalence, risk factors, Sukabumi.

scholarly journals Ergonomic Analysis of the Neck Posture in Computer Users and Identifying the Related Risk Factors

2019 ◽  
Author(s):  
Hamidreza Heidari ◽  
Shahram Arsang ◽  
Maryam Mahmoodi ◽  
Fatemeh Ramezani
Keyword(s):  
Risk Factors ◽  
Preventive Measures ◽  
Statistical Tests ◽  
Computer Users ◽  
Chi Square ◽  
Posture Analysis ◽  
Photographic Analysis ◽  
Related Risk ◽  
Workstation Design ◽  
Chi Square Test

Background:Neck disorder is a common complaint in computer users which affects the task performance and fatigue. Several studies confirmed the relation between neck discomfort and working with a computer. But focusing on the root risk factors inducing neck discomfort can be applied for taking preventive measures and improving workstation design. So, the main purpose of this study was the neck posture analysis in computer users and identifying the related risk factors. Methods:This descriptive-analytical study was performed in 2018 on 169 administrative staff in one of the governmental hospitals in Qom. A researcher-made questionnaire was used to investigate neck discomfort and related risk factors. To determine the angle of the neck, photographic analysis method was used. Finally, SPSS software version 22 and appropriate statistical tests including the logistic regression model, two independent t-test, and chi-square test in contingency tables were used to determine the relationship between individual parameters and workstation with neck angles and neck pain. Results:The results showed that two factors of the height (p= 0.023) and the gender (p= 0.012) had a direct statistically significant association with neck disorder statistically. In addition, the anthropometric dimensions, monitor height from desk level was positively correlated with neck discomfort but sitting elbow to eye height was negatively correlated with neck discomfort (p<0.05). Odds Ratio analysis showed that moderate and severe monitor angle compared to neutral posture (monitor angle less than 10 °) can increase neck discomfort as 1.925 and 3.137, respectively. Conclusion: Generally, it can be concluded that workstation design can affect taking a posture in computer users. So, establishing correct workstation criteria such as eye height, monitor height from desk level and sitting elbow to eye height dimensions are very important. However, determination of the proportion of each parameter effect is strongly recommended for other investigations. This can develop preventive measures for reducing neck awkward postures.

scholarly journals Prevalencia de mastitis subclínica, microorganismos asociados y factores de riesgo identificados en hatos de la provincia de Pamplona, Norte de Santander

2017 ◽  
Vol 64 (2) ◽  
pp. 11-24 ◽  
Author(s):  
Jesús Alberto Mendoza ◽  
Yanedt Vera ◽  
Luis Carlos Peña
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Animal Testing ◽  
Chi Square ◽  
Milk Samples ◽  
California Mastitis Test ◽  
Related Risk ◽  
Factores De Riesgo ◽  
Chi Square Test

Mastitis prevalence, associated microorganisms and related risk factors were determined in dairy operations from municipalities belonging to the province of Pamplona (Norte de Santander). California Mastitis Test (CMT) was performed in 1208 quarters from 302 animals located in 108 rural properties. Milk samples from positive quarters (trace up to 3+) were obtained and submitted for microbiological isolation. Analysis of a 64 variables survey related to the milking practices in the rural properties under study and its link with the presence of the disease was performed using contingency charts and chi-square test (χ2). Determined prevalence per individual was 54,6% (165/302)  (95% CI 48.8 to 60.3) CMT positive animals. In 67,6% (73/108) (95% CI 58.3 to 75.7) of the rural properties the presence of at least one animal testing positive was detected, whereas a total of 21,6% quarters (260/1208) (95% CI 19.3 to 23.9) showed CMT reactivity. From the samples subjected to isolation and microbiological characterization, a total of 74.4% were compatible with Staphylococcus aureus, 12.3% with Streptococcus agalactiae and 13.3% with coliforms. A total of 17 characteristics were associated with the presence of mastitis, all of which were related to poor milking practices. The presence of contagious mastitis associated microorganisms, shows the need for training and orientation to implement proper milking practices and enhance the competitiveness of this sector in the region, which will result in an increase in production.

Stratifying the risk of facial nerve palsy after benign parotid surgery

2014 ◽  
Vol 128 (2) ◽  
pp. 159-162 ◽  
Author(s):  
N Sethi ◽  
P H Tay ◽  
A Scally ◽  
S Sood
Keyword(s):  
Risk Factors ◽  
Facial Nerve ◽  
Facial Palsy ◽  
Significant Risk ◽  
Chi Square ◽  
Nerve Monitoring ◽  
Facial Nerve Monitoring ◽  
Parotid Surgery ◽  
Potential Risk Factors ◽  
Chi Square Test

AbstractIntroduction:Post-operative facial palsy is the most important potential complication of parotid surgery for benign lesions. The published prevalence of facial weakness is up to 57 per cent for temporary weakness and up to 7 per cent for permanent weakness. We aimed to identify potential risk factors for post-operative facial palsy.Materials and methods:One hundred and fifty patients who had undergone parotid surgery for benign disease were retrospectively reviewed. Tumour factors (size, location and histopathology), patient factors (age and sex) and operative factors (operation, surgeon grade, surgeon specialty and use of intra-operative facial nerve monitoring) were all analysed for significant associations with post-operative facial palsy.Results and analysis:The overall incidence of facial palsy was 26.7 per cent for temporary weakness and 2.6 per cent for permanent weakness. The associations between facial palsy and all the above factors were analysed using Pearson's chi-square test and found to be non-significant.Conclusion:These outcomes compare favourably with the literature. No significant risk factors were identified, suggesting that atraumatic, meticulous surgical technique is still the most important factor affecting post-operative facial palsy.

Comparison of Clinical Outcomes With Drug Coated Balloons Versus Plain Balloon Angioplasty In Chronic Limb-Threatening Ischemia

2021 ◽  
pp. 153857442110225
Author(s):  
Joel Mathew John ◽  
Vimalin Samuel ◽  
Dheepak Selvaraj ◽  
Prabhu Premkumar ◽  
Albert A Kota ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Interventional Procedure ◽  
Tertiary Care ◽  
Arterial Disease ◽  
Multivariable Logistic Regression Analysis ◽  
Tertiary Care Centre ◽  
Chi Square ◽  
Exact Test ◽  
Institutional Review ◽  
Chi Square Test

Objective: The use of drug coated balloon (DCB) for angioplasty has shown superior efficacy against plain balloons for treating complex infrainguinal arterial disease. We report and compare the clinical outcomes following application of DCB(Paclitaxel) and plain angioplasty (POBA) in our tertiary care centre. Methods: A retrospective, single centre analysis of 301 patients with chronic limb-threatening ischemia involving the infrainguinal segment was conducted between September 2014 and September 2018, after approval from the Institutional review board. We analyzed clinical outcomes by measuring postoperative ABI improvement, restenosis requiring reintervention procedure, minor and major amputations at the end of 18 months. . To find the association between the group variables (POBA and DCB) and other risk variables, Chi-square test/Fisher’s exact test was used. Multivariable logistic regression analysis was used. Results: Patients who underwent treatment with plain balloon (POBA) and DCB(Paclitaxel) angioplasty were 246(81.7%) and 55(18.3%) respectively. Our study group was predominantly male (Male: Female = 6.7:1), most patients were more than 50 years of age (n = 251, 83.4%). Smoking (n = 199, 66.1%) and diabetes (n = 210, 69.8%) were the most common atherosclerotic risk factors. Postoperative Ankle Brachial Pressure Index (ABI) improvement were similar in both groups (POBA = 57.7%; DCB = 69.8%; p = 0.103). Minor and major amputations following POBA were 26% and 22%; and DCB were 12.7% and 16.4% respectively. Re-stenosis requiring a re-interventional procedure within 18 months was 15%, (n = 37) following POBA; and 12.7% (n = 7) following DCB (p = 0.661). Conclusions: This retrospective study shows similar clinical limb related outcomes following POBA and DCB at 18 months. However, our comparative analysis between the POBA and DCB groups was totally unadjusted and not adjusted for common confounders such as age and sex. Hence, for one to draw definitive conclusions leading to changes in clinical practice; a randomized, prospective study with a larger patient cohort is needed.

scholarly journals Reasons for Tooth Extractions and Related Risk Factors in Adult Patients: A Cohort Study

2020 ◽  
Vol 17 (7) ◽  
pp. 2575
Author(s):  
Pier Carmine Passarelli ◽  
Stefano Pagnoni ◽  
Giovan Battista Piccirillo ◽  
Viviana Desantis ◽  
Michele Benegiamo ◽  
...  
Keyword(s):  
Risk Factors ◽  
Periodontal Disease ◽  
Smoking Habit ◽  
Extraction Process ◽  
Adult Patients ◽  
Diabetic Patients ◽  
Related Risk ◽  
Potential Risk Factors ◽  
Practice Methods ◽  
Tooth Extractions

Background: The aim of this study was to evaluate oral status, the reasons for tooth extractions and related risk factors in adult patients attending a hospital dental practice. Methods: 120 consecutive patients ranging from 23 to 91 years in age (mean age of 63.3 ± 15.8) having a total of 554 teeth extracted were included. Surveys about general health status were conducted and potential risk factors such as smoking, diabetes and age were investigated. Results: a total of 1795 teeth were missing after extraction procedures and the mean number of remaining teeth after the extraction process was 16.8 ± 9.1 per patient. Caries (52.2%) was the most common reason for extraction along with periodontal disease (35.7%). Males were more prone to extractions, with 394 of the teeth extracted out of the total of 554 (71.1%). Male sex (β = 2.89; 95% CI 1.26, 4.53; p = 0.001) and smoking habit (β = 2.95; 95% CI 1.12, 4.79; p = 0.002) were related to a higher number of teeth extracted. Age (β = −0.24; 95% CI −0.31, −0.16; p < 0.001) and diabetes (β = −4.47; 95% CI −7.61, −1.33; p = 0.006) were related to a higher number of missing teeth at evaluation time. Moreover, periodontal disease was more common as a reason of extraction among diabetic patients than among non-diabetic ones (p = 0.04). Conclusions: caries and periodontal disease were the most common causes of extraction in a relatively old study population: further screening strategies might be required for the early interception of caries and periodontal disease.

scholarly journals Prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults

2008 ◽  
Vol 19 (1) ◽  
pp. 34-39 ◽  
Author(s):  
Carlos Estrela ◽  
Cláudio Rodrigues Leles ◽  
Augusto César Braz Hollanda ◽  
Marcelo Sampaio Moura ◽  
Jesus Djalma Pécora
Keyword(s):  
Risk Factors ◽  
Confidence Intervals ◽  
Odds Ratio ◽  
Apical Periodontitis ◽  
Endodontic Treatment ◽  
Technical Quality ◽  
Endodontically Treated Teeth ◽  
Chi Square ◽  
Chi Square Test

The aim of this study was to assess the prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults. A total of 1,372 periapical radiographs of endodontically treated teeth were analyzed based on the quality of root filling, status of coronal restoration and presence of posts associated with apical periodontitis (AP). Data were analyzed statistically using odds ratio, confidence intervals and chi-square test. The prevalence of AP with adequate endodontic treatment was low (16.5%). This percentage dropped to 12.1% in cases with adequate root filling and adequate coronal restoration. Teeth with adequate endodontic treatment and poor coronal restoration had an AP prevalence of 27.9%. AP increased to 71.7% in teeth with poor endodontic treatment associated with poor coronal restoration. When poor endodontic treatment was combined with adequate coronal restoration, AP prevalence was 61.8%. The prevalence of AP was low when associated with high technical quality of root canal treatment. Poor coronal restoration increased the risk of AP even when endodontic treatment was adequate (OR=2.80; 95%CI=1.87-4.22). The presence of intracanal posts had no influence on AP prevalence.

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