Development of a prediction equation for the mixed dentition in a Pakistani sample

Bherwani, Aneel; Fida, Mubassar

doi:10.1016/j.ajodo.2011.02.024

Cited by 27 publications

(30 citation statements)

References 15 publications

(33 reference statements)

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“…The coefficient of determination r 2 of the range of 36% to 44% was observed among the sexes revealing the total variance in canine-premolar widths that could be determined form the knowledge of the combined widths of mandibular incisors. Similar values were obtained in Thai and Pakistan populations [17,27]. Discrepancy in the values of coefficient of determination was also observed among the genders with higher values among the males as also reported in other populations [19,25] and lower values in females which could possibly be attributed to sample size.…”

Section: Discussionsupporting

confidence: 73%

“…Discrepancy in the values of coefficient of determination was also observed among the genders with higher values among the males as also reported in other populations [19,25] and lower values in females which could possibly be attributed to sample size. The standard error of estimate SEE was 0.79 to 0.87 for combined sexes, these lower values indicate better prediction equation and similar to values reported in other populations [17,27].…”

Section: Discussionsupporting

confidence: 53%

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Regression Equations and Probability Tables for Mixed Dentition Analysis in a Nigerian Population

Ajayi¹

2014

JDHODT

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analysis and prediction of the sizes of unerupted teeth. The three main methods utilized includes direct measurement of teeth from the study models and use of prediction tables and equations [3][4][5], direct measurement of teeth sizes from radiographs [6][7][8], and a combination of measurement of tooth sizes on radiographs and use of prediction tables [2,9,10]. The combined methods of tooth sizes measurement from the study models and radiographs have been suggested for better accuracy of space prediction even though the radiographic method is more complex and as such it is used infrequently.The prediction methods of Moyers [3,4] and the Tanaka and Johnston [5] mixed dentition space analysis have been widely adopted and are most commonly used in clinical practices. The Moyers [3] method involved direct measurement of teeth from study models with a generation of data for prediction of the sizes of unerupted canines and premolars from probability table for the sexes combined. Moyers [4] also further provided a different probability tables for prediction of the sizes of unerupted canines and premolars for males and females separately. Similarly, Tanaka and Johnston [5] developed prediction tables comparable IntroductionThe mixed dentition space analysis is an essential part of orthodontic diagnostic procedures required to determine the amount of space available for the alignment of unerupted permanent teeth in a dental arch [1]. Space analysis during the mixed dentition stage facilitate the determination of any tooth size to arch length discrepancy and planning of an appropriate orthodontic treatment for the patients. The mixed-dentition arch analysis is therefore an important criterion in determining whether the treatment plan is going to involve serial extraction, guidance of eruption, space maintenance, space regaining, or just periodic observation of the patient [2]. Information on the mesiodistal widths of an individual maxillary and mandibular tooth is crucial in the analysis of space requirement and availability in the arches. However, in the mixed dentition stage the determination of tooth size entails accurate prediction of the mesiodistal width of the unerupted permanent canines and premolars in both the maxillary and mandibular arches. There have been various methods developed for space AbstractObjectives: The objectives of this study were to evaluate the applicability of both the Moyers and the Tanaka and Johnston mixed dentition space analysis in a Nigerian population, and develop a new probability tables and regression equations for prediction of the size of unerupted canines and premolars in Nigerian population. Methods:The mesiodistal crown dimensions of 54 dental casts of Nigerian subjects were measured with digital calipers. Gender differences were evaluated with independent t-test. Correlation coefficients between the combined mesiodistal widths of the permanent mandibular incisors and the canine and premolars of the maxillary and mandibular arches were determined respectively. Linear regression...

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Section: Discussionsupporting

confidence: 73%

Section: Discussionsupporting

confidence: 53%

Regression Equations and Probability Tables for Mixed Dentition Analysis in a Nigerian Population

Ajayi¹

2014

JDHODT

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“…The arch dimensions showed sexual disparities, with the male having the larger arch dimension than in female like other investigator 50) . Side differences were reported by various researchers for maxillary and mandibular arches 31,[51][52] . However others found no significant side differences in tooth size comparison 19,28,53) .…”

Section: Discussionmentioning

confidence: 99%

“…Several studies in relation to teeth size; mesiodistal [28][29][30][31] buccolingual 32) and arch dimension 28,33,34) has been done on the Pakistani population by sliding caliper but no one used the diagonal teeth dimension and digital models for such investigations [28][29][30][31] .…”

Section: Discussionmentioning

confidence: 99%

Geomorphometrics of Tooth Size and Arch Dimension Analysis by Conventional Digital Caliper and Digital Stereomicroscope to Establish Standard Norms for the Pakistani Population

Shahid

Alam

Khamis

et al. 2015

J. Hard Tissue Biology.

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In order to establish standard norms for the Pakistani population, we investigated the geomorphometrics of tooth size and arch dimension using a conventional digital caliper (DC) and a digital stereomicroscope (SM). The sample consisted of 128 subjects ranging in age from 18 to 24 years. A total of 44,155 variables were measured. Dental models of each subject for maxillary and mandibular arches were scanned via Hirox digital stereomicroscope for the fabrication of the digital models, and the geomorphometrics of tooth size and arch dimensions were measured via SM scanned digital models. All the measurements were also carried out via DC on plaster dental models. Sex differences and changes associated with methods were assessed, and interrelationships between different variables were explored within the study group. For the data obtained by DC and SM techniques, the men had significantly larger arch dimensions and geomorphometrics of tooth size than the women did. There were no significant disparities observed between the techniques. The developed norms for the mesiodistal, buccolingual, diagonal tooth sizes and arch dimension had significantly greater values for males in relation to females (*pd" 0.05 to ***pd" 0.001). This study has established a new reference database of tooth size and arch dimensions via both DC and digital SM for first time on Pakistani population. These norms will be helpful for clinical treatment planning in dentistry. Contemporaneously, the norms will be of great value to forensic dentists and dental anthropologists for making comparisons within and between different populations.

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“…The use of the mandibular permanent incisors as a predictive variable has several advantages: they erupt at the onset of mixed dentition, may easily be measured, show little variability in size, and are directly related to spaces and the management of the problems (MOYERS, 1988;BHERWANI;FIDA, 2011;RAKESH;JALILI, 2011).…”

Section: Discussionmentioning

confidence: 99%

Applicability of moyers' probability table in the population of the northeast of Brazil

Pithon¹,

Santos²,

Araújo³

et al. 2015

Biosci. J.

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ABSTRACT:This study aimed to evaluate the applicability and reliability of Moyers' probability tables in a sample population of youngsters in the Northeast of Brazil. A total of 200 plaster casts of the mandibular arch were evaluated, whom 99 were men and 101 females, aged 15-19 years. For this purpose a digital pachymeter was used to measure the mesiodistal widths of the tooth crowns. The values of the mesiodistal diameters obtained were submitted to statistical analysis by simple linear regression. Only the canine/premolar segment presented significant difference (p<.001) between the mesiodistal diameters of the individuals of the male and female genders, and the male gender presented broader teeth. The regression equations for the mandibular arch for men, Y= 13.42 + 0.37(X) and women, Y= 8.79 + 0.55(X), demonstrated that Moyers' tables with 75 percentage levels, tended to underestimate the real sum of the mandibular permanent canine and premolar of individuals of the male and female gender, however, without statistical difference (p>.05). It could be concluded that there was sexual dimorphism in the size of the teeth for the canine/premolar segment, with men presenting broader teeth. Moyers' probability tables were shown to be reliable for application in white individuals in the Northeast of Brazil.

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Development of a prediction equation for the mixed dentition in a Pakistani sample

Cited by 27 publications

References 15 publications

Regression Equations and Probability Tables for Mixed Dentition Analysis in a Nigerian Population

Regression Equations and Probability Tables for Mixed Dentition Analysis in a Nigerian Population

Geomorphometrics of Tooth Size and Arch Dimension Analysis by Conventional Digital Caliper and Digital Stereomicroscope to Establish Standard Norms for the Pakistani Population

Applicability of moyers' probability table in the population of the northeast of Brazil

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