scholarly journals Applicability of Two Mixed Dentition Analysis in Children of Jangam Community of Belgaum City

2012 ◽  
Vol 3 (4) ◽  
pp. 324-329 ◽  
Author(s):  
Santosh M Sholapurmath ◽  
Deepa B Benni ◽  
Praveen Mandroli
Keyword(s):  
Prediction Method ◽  
Mixed Dentition ◽  
Permanent Teeth ◽  
Maxillary Canine ◽  
Specific Population ◽  
Space Analysis ◽  
Indian Origin ◽  
Significant Difference ◽  
Males And Females ◽  
Mixed Dentition Analysis

ABSTRACT Background and objective Many cases of malocclusion originate during the mixed dentition period. Moyers tables and Tanaka and Johnston space analysis are the most commonly used mixed dentition space analysis. Based on the reported racial and sex differences in tooth sizes, the purpose of this study was to evaluate applicability of the Moyers, Tanaka and Johnston and method of prediction in a Belgaum population and develop a new prediction method for this specific population, if necessary. Materials and methods The study was conducted on sample of 140 children within the age group of 13 to 16 years old belonging to Jangam community, who had fully erupted mandibular permanent incisors and maxillary and mandibular canines and premolars. Mesiodistal crown widths of permanent teeth were measured using a digital calliper of resolution of 0.01 mm. The odontometric values obtained were then subjected to statistical analysis (Student unpaired t-test). Results Gender discrepancy was seen in the study with male showing significantly greater maxillary canine-premolar segment. There is statistical significant difference in tooth dimension between the actual and predicted value at the 50th and 75th percentile of the Moyers probability tables for males and females in both the arches. There were significant differences between the actual measurements and measurements derived from the Tanaka and Johnston equation. Conclusion The Moyers probability tables and Tanaka and Johnston prediction method significantly underestimate canine and premolar mesiodistal width of Jangam population, Indian origin. How to cite this article Sholapurmath SM, Benni DB, Mandroli P. Applicability of Two Mixed Dentition Analysis in Children of Jangam Community of Belgaum City. World J Dent 2012;3(4):324-329.

A Digital Method to Predict the Mesiodistal Widths of Canines and Premolars in an Egyptian Sample

2011 ◽  
Vol 35 (4) ◽  
pp. 421-428 ◽  
Author(s):  
Iman Ibrahim ◽  
Mona Abdullah Elkateb ◽  
Nadia Aziz Wahba ◽  
Nadia El Harouny
Keyword(s):  
Study Design ◽  
Regression Models ◽  
Prediction Equation ◽  
Mixed Dentition ◽  
Permanent Teeth ◽  
Significant Difference ◽  
Permanent Molars ◽  
Validation Set ◽  
Mixed Dentition Analysis ◽  
First Permanent Molars

Objective: Treatment planning in the mixed dentition is important for proper tooth alignment. A mixed dentition analysis, should accurately predict the mesiodistal widths of unerupted permanent teeth. The aim of the present study was to determine which sum of mesiodistal widths (MDW) of permanent teeth will be the best predictor for MDW of unerupted permanent canines and premolars. Study Design: The study was conducted on 102 Egyptians, 51 males and 51 females, mean age 16.7±0.5 years with fully erupted permanent teeth, and intact proximal surfaces. Dental casts were obtained and scanned to produce digital images that were used on a specially designed software program to measure the MDW of permanent teeth. Casts were divided into training and validation sets, where 9 models of tooth combinations were used to develop a regression equation that describes the relation between them and sum of MDW of erupted maxillary or mandibular canines, first and second premolars. The validation set was used to test the accuracy of the proposed equation. Results: R2 of regression models ranged from 0.3 (for models #2,4,5 and 8) to 0.36 for model #1. The highest regression in model #1 (sum of MDW of lower first permanent molars and upper central incisors) indicated a high linear association between the sum of MDW of tooth combination model #1 and the MDW of maxillary and mandibular permanent canines and premolars. There was no significant difference between the actual and the predicted MDW, when the proposed equation was checked for its accuracy in the entire validation set (p>0.05). Conclusion: The combination of the sums of lower permanent first molars and upper permanent central incisors was the best predictor for the MDW of both maxillary and mandibular permanent canines and premolars.The newly proposed prediction equation may be considered clinically useful for mixed dentition analysis in Egyptian subjects.

scholarly journals Comparison and testing the reliability of two non-radiographic techniques of mixed dentition space analysis in Nepalese population

2017 ◽  
Vol 13 (4) ◽  
pp. 410-415
Author(s):  
Rajeev Kumar Mishra ◽  
Vashant Devagiri
Keyword(s):  
Regression Equation ◽  
T Test ◽  
Mixed Dentition ◽  
Tooth Size ◽  
Significant Difference ◽  
Males And Females ◽  
The Difference ◽  
Predicted Values ◽  
Digital Caliper ◽  
Mixed Dentition Analysis

Background & Objectives: Mesio-distal tooth size-arch length discrepancy is one of the major sources of malocclusion. Accurate prediction of space required for unerupted tooth can help in early interception of developing malocclusion. Various methods has been proposed for prediction of mesio-distal  tooth size however accuracy of such methods  in population groups other than that on which these methods are based remains questionable. The aims and objectives   of this study were  to test the reliability of Moyer’s and Tanaka Johnston mixed dentition analysis in Nepalese  population, to construct prediction  tables for Nepalese  population if these methods were found  not reliable.Materials & Methods: Study models of 77 subjects (31 males,46 females) fulfilling the inclusion criteria were retrieved from department archive.  Tooth dimensions were measured using electronic digital caliper. Moyer’s and Tanaka and Jhonston methods were applied to predict   the   mesio- distal tooth size   of canines and premolars. The predicted values were compared with the actual mesio-distal mesio-distal size. A regression equation based on actual canine and premolar mesio-distal dimensions and sum of mandibular permanent incisors was also developed.Results: Independent t-test showed that there was no significant difference between mesio-distal tooth size in males and females. Paired t-test showed that there was no difference in mesio-distal tooth  size between right and left sides of the arch. Tanaka – Johnston analysis overestimated the  mesio-distal size in both males and females. Moyer’s method at 75% overestimated the mesio-distal size  in male and female and the difference were statistically significant  while at 50% it underestimated the tooth  size in females.Conclusion: Moyer’s and Tanaka and Jhonston method of mesio-distal size prediction are inaccurate when applied in Nepalese population. A new regression equation to predict the size of tooth has been presented.

Determine the Applicability of Moyers Analysis in the Contemporary Western Australian Adolescent Population

2021 ◽  
Vol 03 ◽  
Author(s):  
Sidra Abaid ◽  
Sobia Zafar ◽  
Estie Kruger ◽  
Marc Tennant
Keyword(s):  
Prediction Method ◽  
Accurate Prediction ◽  
Mixed Dentition ◽  
Regression Equations ◽  
Space Analysis ◽  
Adolescent Population ◽  
Significant Difference ◽  
Probability Table ◽  
Dental Records ◽  
Western Australian

Background: Moyers probability tables have been widely used to determine the mesiodistal dimensions of unerupted canines and premolars for mixed dentition space analysis. Secular, racial, and sexual dimorphism have been reported in the literature and applicability of Moyer analysis has been doubted in many other populations. Objective: The present study was conducted to determine the applicability of Moyers probability tables and develop a more accurate prediction method in a contemporary Western Australian adolescent population if needed. Methods: A retrospective study including 500 participants [323 females, 177 males] between 13-18 years old attending the orthodontic private practice was conducted. Mesiodistal dimensions of selected participants were obtained from pre-orthodontic treatment digital dental records using Invisalign® technology [ Invisalign®, Align Tech¬nology, Santa Clara, CA, USA] Data were analysed using SPSS. New regression equations were derived based on the sum of permanent mandibular incisors, and probability tables were proposed for more accurate prediction. Results: Significant differences were found between the measured sum of permanent canine-premolar segments and those predicted with the Moyers probability table, at all percentile levels, except the 50th percentile, where no significant difference was observed. Conclusion: Moyers probability table can be applied at the 50th percentile for estimation of sum of mesiodistal dimensions of canine-premolars segments. Newly developed regression equations and tables could be considered to provide more accurate mixed dentition space analysis.

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 Applicability of two non-radiographic tooth size prediction methods of unerupted permanent canine and premolars, for Galle district, Sri Lanka

2019 ◽  
Vol 9 ◽  
pp. 178-181
Author(s):  
W. Kathya Perera ◽  
Sumith Gunawardane ◽  
Sumith Loku Pathirage
Keyword(s):  
Sri Lanka ◽  
Pearson Correlation ◽  
Significance Test ◽  
Mixed Dentition ◽  
Permanent Teeth ◽  
Regression Equations ◽  
School Students ◽  
Significant Difference ◽  
Probability Table ◽  
Predicted Values

Introduction: Mixed dentition space analysis necessitates accurate prediction of size of the unerupted permanent teeth. The methods commonly employed are the radiographs, correlation and regression equations, or a combination. Much interest was developed on the application of prediction tables and regression equations to avoid the radiation exposure. However, the predicted values and equations have been reported to be inaccurate on populations other than on which they were developed on. We intended to evaluate the applicability of the Moyer’s probability table and Tanaka Johnston equation in estimating the mesiodistal widths of mandibular and maxillary permanent canines and premolars in adolescents of the Galle District. Material and Methods: Data were collected from study models of 318 randomly selected school students aged 13– 16 years with fully erupted, intact dentitions and no significant malocclusion. The measurements were obtained by a digital caliper with a Vernier scale calibrated to the nearest 0.01 mm. The data were subjected to statistical analysis to compare the actual and predicted values from Moyer’s probability table and Tanaka Johnston equation. Results: There was a statistically significant difference when Pearson correlation two-tailed significance test was used. The actual mesiodistal width of permanent canines and premolars and predicted widths from Moyer’s probability chart at all levels for males and females showed a statistically significant difference at 0.01 level. The values from Tanaka Johnston equation also showed a statistically significant difference at P = 0.01/R = 0.47. Conclusion: Moyer’s prediction table and Tanaka Johnston equation must be carefully used for children in Galle District, Sri Lanka. Therefore, it might be safer to develop regression equations for our population.

scholarly journals Leeway Space Mandibula pada Siswa Suku Minang di Sekolah Dasar Lubuk Sikaping, Sumatera Barat

2019 ◽  
Vol 7 (2) ◽  
pp. 97-103
Author(s):  
Ayu Shafira ◽  
Hafni Bachtiar ◽  
Didin K
Keyword(s):  
Elementary School ◽  
Prediction Method ◽  
Significant Degree ◽  
T Test ◽  
Mixed Dentition ◽  
Cross Sectional ◽  
Significant Difference ◽  
The Difference ◽  
The Right ◽  
Test Result

The prediction of permanent size of theet which haven’t errupted to determine the value of place needed, availability of space and predict the storage of space. Is one of important aspect in diagnosis and treatment planning on the period of mixed dentition. Prediction method that used commonly is Moyers method which the data is taken from Kaukasoid ras. The objective of the research is to see the difference of leeway space of mandibula on Minang man and woman students of elemantary school Lubuk Sikaping. The method of this research is cross sectional comprative study. 56 samples of mandibula study are taken from the student of SDN 06 Pauh, SDN 09 Pauh, and SDN 10 Pauh Lubuk Sikaping  at  the  age  of  8  to  10  years  and  they  are  Minangnese.  The  results  are  analyzed  statistically  by  t-test  on significant degree 95%. This research indicates that the large average of man mandibula leeway space on the left (1,76 mm) and on the right (1,85 mm). And the average of leeway space of woman mandibula leeway space on the left (2,03  mm)  and  on  the  right  (2,16  mm).  The  analyze  t-test  result  on  the  significant  degree  95%  show  there  is  no significant  difference  (p>0,05)  between  man  and  woman  students.  Therefore,  it  can  be  concluded  that  the  large average of  leeway  space of  man  and  woman  mandibula  in  Minang  students of  elementary  school  Lubuk  Sikaping showed no significant difference in size.

scholarly journals Prediction of Combined Mesiodistal Width of Unerupted Permanent Canine and Premolars using Moyer’s Mixed Dentition Analysis in Nepalese Newar Population

2019 ◽  
Vol 9 (2) ◽  
pp. 66-70
Author(s):  
Amrita Shrestha ◽  
Dilesh Pradhan
Keyword(s):  
Caucasian Population ◽  
Mixed Dentition ◽  
Probability Level ◽  
Significant Difference ◽  
Probability Table ◽  
Orthodontic Patients ◽  
Using Data ◽  
Mixed Dentition Analysis

Introduction: Moyer’s probability table is most commonly used to predict the mesiodistal width of permanent canines and premolars in mixed dentition. However, the table was formulated using data from Caucasian population. This study was performed to compare the Moyer’s prediction table with actual value in Nepalese Newar population as ethnicity is one of the important factor to determine teeth width. Materials & Method: Combined mesiodistal width of permanent canine and premolars were measured in 150 study models of Nepalese Newar orthodontic patients (75males and 75 females). The value was compared with the Moyer’s prediction table at all probability level. Result: There was no statistically significant difference between the actual combined width and that predicted from Moyer’s table at 85% probability level for maxilla and at 75% level for mandible in male, at 95% probability level for maxilla and at 85% probability level for mandible in female. Conclusion: Moyer’s probability level can be used to predict the combined mesiodistal width of permanent canines and premolars in Nepalese Newar population but at specific probability level.

Resorption of multirooted temporary teeth in children with dentofacial anomalies in accordance with the orthopantomography data

2020 ◽  
Vol 20 (3) ◽  
pp. 235-241
Author(s):  
F. S. Ayupova ◽  
S. N. Alekseenko ◽  
V. Ya. Zobenko ◽  
T. V. Gayvoronskaya
Keyword(s):  
Primary Teeth ◽  
Root Resorption ◽  
Type A ◽  
Mixed Dentition ◽  
Permanent Teeth ◽  
Primary Molars ◽  
Second Primary ◽  
X Rays ◽  
Primary Molar ◽  
Posterior Teeth

Relevance. To study the incidence of different types of resorption of multirooted primary teeth, to specify indications for deciduous molar extraction to prevent eruption abnormalities of permanent posterior teeth in mixed dentition.Materials and methods. Root resorption of 375 multirooted primary teeth (166 first primary molars and 209 second primary molars) was studied on panoramic X-rays of 60 children (30 girls and 30 boys) aged between 7 and 15. Illustrated classification by T.F. Vinogradova (1967) improved by authors was used to determine type and degree of root resorption of multi-rooted primary teeth. Received data were described with absolute values of number of cases and percentage. Chi-square was used to detect differences in sign incidence rate between groups, p<0.05 was considered statistically significant.Results. There were no statistically significant gender differences (p>0,05) in type and degree of root resorption of multirooted primary teeth. Type A resorption prevailed and constituted 53.3% of all primary molars. Disturbances in root resorption of multirooted primary teeth in mixed dentition were related to health condition of primary teeth. Transition of even resorption to unven was considered a risk factor of delayed eruption and aberrant position of permanent teeth, and indication for extraction of a primary molar in question. Conclusions. 1) Even root resorption (type A) was detected in 53.3% of primary molars in mixed dentition by orthopantomography. 2) Transition from even resorption of primary molar roots to uneven resorption was associated with eruption deviations and delayed premolar eruption. 3) Timely extraction of primary molars with uneven root resorption facilitated correct eruption of premolars and increased effectiveness of secondary prevention of malocclusion in children.

MICROSCOPIC AND MOLECULAR DIAGNOSIS OF Ascaridia spp. IN DOMESTIC PIGEONS(Columba livia domestica) IN BAGHDAD CITY,IRAQ

2020 ◽  
Vol 51 (4) ◽  
pp. 1220-1225
Author(s):  
Faraj & Al- Amery
Keyword(s):  
Molecular Diagnosis ◽  
Columba Livia ◽  
Ascaridia Galli ◽  
Molecular Assay ◽  
Infection Rates ◽  
Conventional Pcr ◽  
Significant Difference ◽  
Pcr Products ◽  
Males And Females ◽  
Domestic Pigeons

Ascaridiosis is a very important parasitic disease of birds, it is caused by Ascaridia. This study was conducted to identify the Ascaridia species by microscopic and molecular assay in Baghdad city. One hundred and sixty fecal samples were collected from domestic pigeons during the period from 1/1/ 2019 to 31/3/ 2019.  Results showed that the rate of infection for Ascaridia spp. 15.62% by microscopic examination.  Significant difference was observed in infection rates between males and females pigeons. Fifty samples randomly selected and subjected to molecular diagnosis of Ascaridia  spp.. Molecular examination results, the total infection rate showed 16%(8/50). The eight  positive PCR products were sequenced and deposited in Gene bank data base, phylogenic analysis demonstrated that 4 sequences belongs to Ascaridia galli ( MK918635.1, MK918636.1, MK918847.1, MK919081.1), while 2 (MK919199.1, MK919200.1) belong to  Ascaridia nymphii and 2 (MK919207.1, MK919264.1)  belong to Ascaridia numidae. It is the first study in Iraq to diagnosis of  Ascaridia nymphii and Ascaridia numidae  in domesticed pigeons by using conventional PCR.

Mixed Dentition Analysis Procedure:A Review

2019 ◽  
Vol 10 (12) ◽  
pp. 1131
Author(s):  
A. Keerthika ◽  
J. Jeevarathan ◽  
Ponnudurai Arangannal ◽  
M. Vijayakumar ◽  
S. Amudha ◽  
...  
Keyword(s):  
Mixed Dentition ◽  
Mixed Dentition Analysis
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