Regression Equations for Predicting the Size of Unerupted Canines and Premolars in an Iranian Population: A Pilot Study

2010 ◽  
Vol 11 (5) ◽  
pp. 33-40 ◽  
Author(s):  
Maryam Talebi ◽  
Iman Parisay ◽  
Ali Sarraf ◽  
Fateme Mazhari
Keyword(s):  
Pilot Study ◽  
Correlation Coefficients ◽  
Iranian Population ◽  
Mixed Dentition ◽  
Regression Equations ◽  
Moderate Correlation ◽  
Cross Sectional ◽  
Significance Level ◽  
Mandibular Arch ◽  
Simplified Formula

Abstract Aim The aim of this pilot study was to evaluate equations for predicting the size of unerupted canines and premolars during the mixed dentition period in an Iranian population. Methods and Materials This cross-sectional analysis was performed on 106 subjects (52 girls, 54 boys, aged 13–15 years). Data were obtained from dental cast by making direct measurements of the maximum mesiodistal widths of all mandibular and maxillary incisors, canines, premolars, and first molars with an electronic digital sliding caliper, with an accuracy of ±0.02 mm and repeatability of ±0.01 mm. The results were statistically analyzed using Student t tests, Pearson product-moment coefficients, and ANOVA tests. Correlation coefficients (r) and error variance of estimates were determined using a significance level of p<0.05. Results No significant differences were found between the mesiodistal tooth widths of males and females in this Iranian population. The highest correlation was between the sum of the mesiodistal width of canines and premolars in the maxilla with the mesiodistal width of the mandibular first molars and maxillary central incisors (r=0.742). A moderate correlation was obtained in the mandible (r=0.665). Approximations were developed to predict the size of the unerupted canines and premolars in both jaws (in the maxilla, Y = 0.740X + 14.271, or the simplified formula, Y = 3/4X + 14; for the mandibular arch, Y = 0.658X + 16.353, or the simplified formula, Y = 2/3 X + 16). Conclusion The strongest correlation was found for the sum of the mesiodistal width of canines and premolars in the maxilla with the mesiodistal width of the mandibular first molars and maxillary central incisors in the maxillary analysis (r=0.742). A moderate correlation was found in the mandible for the sum of the mesiodistal width of canines and premolars with the mesiodistal width of the mandibular first molars and maxillary central incisors (r=0.665). Clinical Significance The simplified equations proposed for the maxillary arch (Y = 3/4 X + 14) and for the mandibular arch (Y = 2/3 X + 16) offer an easy and practical way to predict the size of unerupted canines and premolars in the maxillary and mandibular arches of Iranian children. Citation Talebi M, Parisay I, Sarraf A, Mazhari F. Regression equations for predicting the size of unerupted canines and premolars in an Iranian population: A pilot study. J Contemp Dent Pract [Internet], 2010 October; 11(5):033-040. Available from http://www.thejcdp.com/journal/view/ volume11-issue5-talebi

scholarly journals New Regression Equations for Mixed Dentition Space Analysis in an Iranian Population

2013 ◽  
Vol 14 (6) ◽  
pp. 1156-1160 ◽  
Author(s):  
Mohammad Hossein Toodehzaeim ◽  
Hossein Aghili ◽  
Elham Shariatifar ◽  
Mahboobe Dehghani
Keyword(s):  
Linear Regression ◽  
Correlation Coefficients ◽  
Iranian Population ◽  
New Method ◽  
Mixed Dentition ◽  
Regression Equations ◽  
Space Analysis ◽  
Novel Approach ◽  
Mixed Dentition Analysis ◽  
Mandibular Incisors

Abstract Aims Prediction of the mesiodistal crown width of unerupted canines and premolars is an important aspect of mixed dentition analysis. The accuracy of Tanaka-Johnston equations, the most commonly method, is questionable when it is applied to different ethnic groups. In this study, we aimed to develop a new regression equation for this prediction in an Iranian population. Materials and methods The dental casts of 120 Iranian subjects with complete permanent dentition were selected. Mesiodistal crown widths of teeth were measured with digital caliper. In the first part of the study, the correlation and linear regression equations between four mandibular incisors and the canine-premolars segments of both arches were developed (modified Tanaka-Johnston equation). In the second part, as a new method, correlation and linear regression equations were developed between the sum of mandibular central incisorsmaxillary first molars and the canine-premolars segments. Results It was found that the correlation coefficients between the sum of mandibular central incisors-maxillary first molars and the maxillary and mandibular canine-premolars segments were higher (r = 0.66, 0.68 respectively) than the one between the four mandibular incisors and the canine-premolars segments (r = 0.58. 0.64). Conclusion New linear regression equations were derived. In this study, the sum of mandibular central incisors and maxillary first molars was better predictor for unerupted canines and premolars. This novel approach allows the prediction of width of unerupted canines and premolars to take place at earlier age. Clinical significance Using the new method, orthodontists could take advantage of mixed dentition analysis at earlier age. Moreover, to test the derived equations on a larger sample size and in other ethnicities is highly recommended. How to cite this article Toodehzaeim MH, Aghili H, Shariatifar E, Dehghani M. New Regression Equations for Mixed Dentition Space Analysis in an Iranian Population. J Contemp Dent Pract 2013;14(6):1156-1160.

scholarly journals Knowledge, Attitudes, Behaviors of Women Related to Pregnancy, and Early Childhood Caries Prevention: A Cross-Sectional Pilot Study

2021 ◽  
Vol 12 ◽  
pp. 215013272110133
Author(s):  
Neel Shimpi ◽  
Ingrid Glurich ◽  
Catherine Maybury ◽  
Min Qi Wang ◽  
Kazumasa Hashimoto ◽  
...  
Keyword(s):  
Oral Health ◽  
Pilot Study ◽  
Health Education ◽  
Survey Study ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Health Maintenance ◽  
Significance Level ◽  
Study Results ◽  
And Behaviors

Objective Health education interventions during pregnancy can influence maternal oral health (OH), maternal OH-behaviors and children’s OH. Interventions that can be delivered at anytime and anywhere, for example mobile-health (mHealth) provides an opportunity to address challenges of health education and support activation of women in underserved and rural communities to modify their health behavior. This pilot study was undertaken as a part of a mHealth initiative to determine knowledge, attitudes, and behaviors related to pregnancy and ECC prevention among women attending obstetrics/gynecology (OB/GYN) practices at a large rurally-based clinic. Methods A cross-sectional survey study was voluntarily engaged by women (n = 191) aged 18 to 59 years attending OB/GYN visits, over a 3-week period from 12/2019 to 1/2020. Survey results were analyzed applying descriptive statistics, X2 and Fisher’s Exact tests. The significance level was set at P < .0001 for all analyses. Results Approximately half of respondents were between 18 and 29 years (53%), had a college degree (55%), and 100% reported cell phone use. Whereas 53% and 31%, respectively, indicated that they were “somewhat” or “very” sure of how to prevent ECC in their children, only 9% recognized evidence of early decay and 30% did not know the purpose of fluoride. Overall, only 27% of participants correctly answered the knowledge-based questions. Further, only 57% reported their provider explained things in a way that was easy to understand. Only 24% reported seeing a dentist during their current pregnancy. Conclusions Study results suggested potential gaps in knowledge and behaviors related to ECC prevention and provided baseline data to inform future interventions to improve ECC prevention practices. Notably, majority of participants used their cell phones for making medical/dental appointments and reported using their phones to look up health-related information. This demographic represents a potentially receptive target for mHealth approaches to improve understanding of oral health maintenance during pregnancy and ECC prevention.

scholarly journals TANAKA AND JOHNSTON'S MIXED DENTITION VALIDITY: AN ANALYSIS AMONG YEMENI ADULTS IN SANA'A CITY

2022 ◽  
Author(s):  
Waleed Abdualaziz Mohammad Dahag ◽  
Abdulwahab Ismail Mohamed Al-Kholani ◽  
Taghreed Ahmed M Al-Kibsi ◽  
Hussein Shoga Al-Deen ◽  
Hassan Abdulwahab Al-Shamahy ◽  
...  
Keyword(s):  
Peer Review ◽  
School Children ◽  
Correlation Coefficients ◽  
T Test ◽  
Mixed Dentition ◽  
Primary School Children ◽  
Regression Equations ◽  
Chi Square ◽  
Anterior Teeth ◽  
Tooth Width

Introduction and objective: Mixed dentition space analysis methods via Tanaka-Johnston analysis are regularly used all over the world. Conversely, the appropriate of this analysis between different ethnic groups is dubious. The study aimed to test the appropriate of the Tanaka-Johnston analysis for Yemeni adults and to arise regression equations designed for Yemen population if needed.  Methods: The study included two hundred and twenty-seven (106 males and 121 females) Yemenis from Sana'a University, University of Science and Technology, and Al-Rehab Private Clinic. The mesiodistal widths of the four permanent lower canines, incisors, and premolars for the entire quadrants were determined with a digital caliper to the nearest 0.01 mm. To compare average presentation values ​​derived from this study with values ​​derived using Tanaka-Johnston equations, Student's paired t-test was used, as well as the chi-square (χ2) test used for appropriateness of fit. Result: Gender differences were observed in the total mesiodistal width of both canines and premolars in both arches as revealed by the t-test (p < 0.001). The sum of the actual mesiodistal width of the canines and premolars was compared with the expected widths derived from the Tanaka and Johnston equation and significant differences (p<0.001) were found. Regression analysis indicated that the sum of the mesiodistal width of the permanent mandibular incisors is a good predictor of that of un-erupted canines and premolars, with correlation coefficients ranging from 0.51 to 0.61. Accordingly, two linear regression equations were developed to predict tooth width for Yemeni males and females. Conclusion: It was concluded from this study that the Tanaka-Johnston analysis did not accurately predict the mesiodistal width of the unruptured canines and premolars of the Yemeni population. Moreover, new regression equations have been developed for the research sample that can be a standard for Yemen. However, further studies must be performed to verify the applicability and accuracy of these equations.                   Peer Review History: Received: 10 November 2021; Revised: 12 December; Accepted: 29 December, Available online: 15 January 2022 Academic Editor: Dr. Asia Selman Abdullah, Pharmacy institute, University of Basrah, Iraq, [email protected] UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency.  Received file:                Reviewer's Comments: Average Peer review marks at initial stage: 6.5/10 Average Peer review marks at publication stage: 7.5/10 Reviewers: Dr. A.A. Mgbahurike, University of Port Harcourt, Nigeria, [email protected] Rola Jadallah, Arab American University, Palestine, [email protected] Similar Articles: PREVALENCE AND CAUSES OF TRAUMATIC DENTAL INJURIES TO ANTERIOR TEETH AMONG PRIMARY SCHOOL CHILDREN IN SANA'A CITY, YEMEN OCCLUSAL CHARACTERISTICS OF THE PRIMARY DENTITION AMONG A SAMPLE OF YEMENI PRE-SCHOOL CHILDREN

scholarly journals Is the MDS-UPDRS a Good Screening Tool for Detecting Sleep Problems and Daytime Sleepiness in Parkinson’s Disease?

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Krisztina Horváth ◽  
Zsuzsanna Aschermann ◽  
Péter Ács ◽  
Edit Bosnyák ◽  
Gabriella Deli ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Daytime Sleepiness ◽  
Screening Tool ◽  
Rating Scale ◽  
Sleep Problems ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Moderate Correlation ◽  
Cross Sectional

Movement Disorder Society-sponsored Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) has separate items for measuring sleep problems (item 1.7) and daytime sleepiness (1.8). The aim of our study was to evaluate the screening sensitivity and specificity of these items to the PD Sleep Scale 2nd version (PDSS-2) and Epworth Sleepiness Scale (ESS). In this nationwide, cross-sectional study 460 PD patients were enrolled. Spearman’s rank correlation coefficients were calculated between the individual items, domains, and the total score of PDSS-2 and item 1.7 of MDS-UPDRS. Similarly, the items and the total score of ESS were contrasted to item 1.8 of MDS-UPDRS. After developing generalized ordinal logistic regression models, the transformed and observed scores were compared by Lin’s Concordance Correlation Coefficient. Only item 3 difficulties staying asleep and the “disturbed sleep” domain of PDSS-2 showed high correlation with “sleep problems” item 1.7 of the MDS-UPDRS. Total score of PDSS-2 had moderate correlation with this MDS-UPRDS item. The total score of ESS showed the strongest, but still moderate, correlation with “daytime sleepiness” item 1.8 of MDS-UPDRS. As intended, the MDS-UPDRS serves as an effective screening tool for both sleep problems and daytime sleepiness and identifies subjects whose disabilities need further investigation.

A Pilot Study Comparing Pedometer Counts with Reported Physical Activity in Elementary Schoolchildren

2004 ◽  
Vol 16 (4) ◽  
pp. 355-367 ◽  
Author(s):  
Greet Cardon ◽  
Ilse De Bourdeaudhuij
Keyword(s):  
Physical Activity ◽  
Pilot Study ◽  
Vigorous Physical Activity ◽  
Step Count ◽  
Regression Equations ◽  
Moderate Correlation ◽  
Daily Step ◽  
Step Counts ◽  
Daily Step Count

In this study pedometer counts were recorded for 6 consecutive days for 92 children (mean age = 9.6 years; range 6.5–12.7) and were compared with the number of minutes per day in which the participants engaged in moderate-to-vigorous physical activity (MVPA). Diaries filled out with the assistance of one of the children’s parents were used to determine minutes of MVPA. The average daily step count was significantly higher in boys than in girls, although the average daily MVPA engagement in minutes did not vary significantly between genders. Based on the regression equations, 60 min of MVPA was equivalent to 15,340 step counts in boys, 11,317 step counts in girls, and 13,130 step counts when results for both genders were combined. A moderate correlation (r = .39, p < .001) was found between pedometer step counts and reported minutes of MVPA. According to the present study findings, however, predictions and promotion of daily MVPA engagement in children based on pedometer counts per day should be made with caution.

scholarly journals Is It Possible to use Cross-sectional and Vertical Facial Measurements to establish the Shape of the Mandibular Arch?

2014 ◽  
Vol 15 (6) ◽  
pp. 735-739
Author(s):  
Adilson Luiz Ramos ◽  
Ossam Abu El Haje ◽  
Daniela Daufenback Pompeo ◽  
Gisela Crippa Furtado ◽  
Luciana Monti Lima Rivera
Keyword(s):  
Previous History ◽  
Dental Arch ◽  
Cross Sectional ◽  
Method Error ◽  
Significance Level ◽  
Mandibular Arch ◽  
The Face ◽  
History Of ◽  
Examiner Agreement ◽  
Plaster Models

ABSTRACT Background Given the benefits of radiographic cephalometric studies in determining patterns of dental-skeletal-facial normality in orthodontics, the aim of this study was to investigate the association between mandibular dental arch shape and cross-sectional and vertical facial measurements. Materials and methods It was analyzed plaster casts and teleradiographs in frontal and lateral norm belonging to 50 individuals, aged between 15 and 19 years, with no previous history of orthodontic treatment and falling into four of the six Andrews's occlusion keys. The plaster models were scanned (3D) and the images of the dental arches were classified subjectively as oval, triangular and quadrangular by three calibrated examiners, with moderate inter-examiner agreement (Kappa = 0.50). After evaluation of the method error by paired t test (p > 0.05), it was carried out the analysis of cross-sectional and vertical facial measurements to be compared to the shape of the dental arch. Data were subjected to one-way analysis of variance with a significance level of 5%. Results When the VERT index was compared with the three arch shapes, no measurement showed statistically significant differences (p > 0.05): triangular (0.54); oval (0.43); and quadrangular (0.73); as well as there were no differences (p > 0.05) in the widths of the face (141.20; 141.26; 143.27); maxilla (77.27; 77.57; 78.59) and mandible (105.13; 103.96; 104.28). Conclusion It can be concluded that there was no correlation between different shapes of the mandibular dental arch and the cross-sectional and vertical facial measurements investigated. How to cite this article El Haje OA, Pompeo DD, Furtado GC, Rivera LML, Paranhos LR. Is It Possible to use Cross-sectional and Vertical Facial Measurements to establish the Shape of the Mandibular Arch? J Contemp Dent Pract 2014;15(6):735-739.

scholarly journals Height Estimation Using Arm Span and Hand Length Measurements

2017 ◽  
Vol 15 (2) ◽  
pp. 23-25
Author(s):  
Biswas Satyal ◽  
Abhishek Poudel
Keyword(s):  
Body Height ◽  
Correlation Coefficients ◽  
Regression Equations ◽  
Cross Sectional ◽  
Standing Height ◽  
Arm Span ◽  
Measuring Tape ◽  
Males And Females ◽  
Hand Length ◽  
The Relationship

Introduction: Arm span and hand length can be used for the estimation of an individual stature. Arm span, hand length, foot length, head circumference etc. have been proved to be useful to correctly estimate the height of a person. It can be useful in various medico legal purposes. Objectives: The present study was undertaken to find the correlation between the arm-span and hand length with the standing height of both males and females and to derive regression equations for estimation of their height. Materials and Method: This cross sectional type of descriptive study was carried out with a total number of 200 Nepalese medical students consisting of 120 male and 80 female aged between 18 to 24 years. Stature, arm span and hand length were measured directly from the subjects by using anthropometric technique by a measuring tape and a spreading caliper. The data taken were statistically analyzed by computation. The relationship between body height, arm span and hand length were determined using simple correlation coefficients. Result and Conclusion: In this study, the correlation between the arm-span and hand length with the standing height of both males and females was found to be an accurate predictor of the height and regression formulae were derived for calculating the height of male or female with the arm-span and hand length.

PENGARUH PARTISIPASI IBU DALAM KELAS IBU HAMIL TERHADAP CAKUPAN K4

2021 ◽  
Vol 3 (3) ◽  
pp. 265
Author(s):  
Lilik Anggraini ◽  
Sunarsih Sunarsih ◽  
Baksono Winardi
Keyword(s):  
Public Health ◽  
Antenatal Care ◽  
Pregnant Women ◽  
Health Centre ◽  
Correlation Coefficients ◽  
P Value ◽  
Cross Sectional ◽  
Public Health Centre ◽  
Significance Level ◽  
Strong Conclusion

Abstrak Latar Belakang : Kelas Ibu Hamil (KIH) adalah kelompok belajar ibu-ibu hamil dengan anggota maksimal 10 orang yang merupakan sarana untuk belajar bersama. Puskesmas Menur merupakan puskesmas yang terendah cakupan K4 66,93% dari target 90%. Jumlah peserta dari kelas ibu hamil sendiri 3,4%. Tujuan dari penelitian ini adalah menganalisis pengaruh partisipasi ibu dalam kelas ibu terhadap cakupan K4. Metode dan Bahan Penelitian : Jenis penelitian ini observasional analitik dengan pendekatan cross sectional. Besar sampel sebanyak 44 orang, dengan teknik pengambilan sampel accidental sampling. Variabel Independent yang diukur adalah partisipasi ibu dalam kelas ibu hamil sedangkan variabel dependent adalah cakupan K4. Pengambilan data dengan menggunakan kuisioner untuk mengukur partisipasi ibu dalam kelas ibu hamil dan cakupan K4 dengan mengobservasi dari buku KIA dan kohort. Analisis data menggunakan uji statistik Spearman Rho’ dengan α= 0,05. Hasil : Sebagian besar ibu hamil (65,9%) memiliki partisipasi baik, ibu hamil yang berpartisipasi baik sebagian besar (61,4%) cakupan K4 lengkap, dan ibu hamil yang berpartisipasi kurang sebagian kecil (13,6%) cakupan K4 tidak lengkap. Pada analisis data didapatkan p value = 0,004 (p<0,05) artinya ada pengaruh partisipasi ibu dalam kelas ibu hamil terhadap cakupan K4. koefisien korelasi 0,421 yang berada pada rentang 0,40 – 0,599 bermakna kekuatan korelasi antar variable sedang. Sedangkan angka koefisien korelasi pada hasil diatas bernilai positif,, sehingga pengaruh kedua variable tersebut bersifat positif yang kuat. Kesimpulan : ada pengaruh partisipasi ibu dalam kelas ibu hamil terhadap cakupan K4 di Puskesmas Menur Kecamatan Kota SurabayaAbstract Background: Maternal Class is a study group pregnant mothers with members a maximum of 10  to learn together. Menur Public Health Centre is the lowest completeness (K4) ANC of maternal 66,93% from target 90%. Total of participants from the maternal class just 3,4%. This research aims to analyze the influence of maternal class participant to completeness (K4) Antenatal care. Methods and Material: the research was conducted using quantitative observational analytic with cross sectional study approach.. The number of research is 44 pregnant women. The Accidental sampling method is apllied in taking the sample in this research. Data collected by quistionaire to determine participation in maternal class and completeness seen by observing MCH books and cohort. Data analyzed by Spearman Rho’statistic test at significance level α=0,05. Results: Most (65,9%) have a good participation in maternal class, most pregnant women who have good participation (61,4%) have K4 antenatal care scope completely, and a small proportional (13,6%) of pregnant women with lack participation did not have completeness (K4) Antenatal care. Data analize was obtained p value = 0,004 (p<0,05) which means there was influence of maternal class participant to completeness (K4) Antenatal care . Correlation coefficients value’s 4,21 in the range of 0,40 – 0,599 which means the strength between variables is medium. While the correlation coefficient number in results are positively strong. Conclusion : there was influence of maternal class participant to completeness (K4) Antenatal care at working area Menur Public Health Centre in Sukolilo Municipality Surabaya City.

Predicting the size of unerupted canines and premolars of the maxillary and mandibular quadrants in an Iranian population

2007 ◽  
Vol 32 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Hosseinzadeh Tahere ◽  
Shalchi. Majid ◽  
Mohandes. Fateme ◽  
Kharazi fard ◽  
Mohammad Javad
Keyword(s):  
Good Accuracy ◽  
Correlation Coefficients ◽  
Iranian Population ◽  
Regression Equations ◽  
Probability Level ◽  
Inclusion Criteria ◽  
Male Subjects ◽  
Digital Caliper ◽  
Lower Arch ◽  
Actual Size

The aim of this investigation was to examine the accuracy of Moyers probability tables and the Tanaka and Johnston prediction equations in predicting the size of unerupted canines and premolars of the maxillary and mandibular quadrants in an Iranian population and to derive a standard formula for it. Methods. Out of a sample of 280 subjects, 50 (25 males and 25 females) were selected by specific inclusion criteria. An electronic digital caliper was used to read the nearest 0.01mm. The teeth measurements derived were compared with those predicted from Tanaka Johnston equations and Moyers probability tables and then standard regression were developed. Results. Tanaka and Johnston regression equations overestimate the mesiodistal width of permanent canines and premolars. There were no statistically significant differences between actual mesiodistal width of canines and premolars and the predicted width from Moyers charts at 65% for the lower and upper arches in male subjects and for the lower arch in females but none of the probabilities has good accuracy for the upper arch in females. For the newly developed regression equations, the correlation coefficients between the sum of the mandibular incisors and the sum of the canine and premolars were 0.709 (for lower) and 0.539 (for upper) in subjects. Conclusions: Tanaka and Johnston overestimate the actual size for Iranian teeth widths. Moyers method can be used at 65% probability level for male subjects and at the 75% and 85% level for upper arch and the 50%and 65% level for lower arch in female subjects.

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