Accuracy and evaluation of a new regression equation in predicting the width of unerupted permanent canines and premolar teeth
- 86 Downloads
To assess the applicability of two regression equations based on mixed dentition analysis and to propose and evaluate a new regression equation using the mandibular incisors and first permanent molars as predictors in calculating the size of unerupted permanent canines and premolar teeth in school children.
Dental study casts of 100 children (50 males and 50 females) aged 11–14 years from schools situated in Moradabad, Uttar Pradesh, India were used. The analysis of Tanaka Johnston, Bernabe Flores-Mir and the proposed equation were tested on the casts.
The analysis of Tanaka Johnston and Bernabe Flores-Mir tended to overestimate the mesio-distal width of the canines and premolars. The proposed equation also overestimated but the mean difference showed a closer approximation with the actual measured values compared to the other two equations.
Validating studies with a similar population must be conducted to confirm the applicability and precision of the proposed equation.
KeywordsDental study cast Mixed dentition analysis Mesio-distal width New regression equation Children
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
Research involving human participants and/or animals
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
Informed consent was obtained from all individual participants included in the study.
- Black GV. Descriptive anatomy of the human teeth, Ch. 16. 4th ed. Philadelphia: SS White Dental Mfg. Co; 1897. p. 16.Google Scholar
- Martinelli FL, Lima EM, Rocha R, Araujo MST. Prediction of lower permanent canine and premolars width by correlation methods. Angle Orthod. 2005;75:805–8.Google Scholar
- Moyers RE. Handbook of orthodontics. 3rd edn. Chicago: Year Book Medical Publishers; 1973.Google Scholar
- Proffit WR, Fields HW, Sarver DM. Contemporary orthodontics. 5th edn. St. Louis: Elsevier Mosby; 2013.Google Scholar
- Shah S, Bhaskar V, Venkataraghvan K, et al. Applicability of regression equation using widths of mandibular permanent first molars and incisors as a predictor of widths of mandibular canines and premolars in contemporary Indian population. J Indian Soc Pedod Prev Dent. 2013;31:135–40.CrossRefPubMedGoogle Scholar
- Sonahita A, Dharma RM, Dinesh MR, et al. Applicability of two methods of mixed dentition analysis in a contemporary Indian population sample. Eur J of Paediatr Dent. 2012;13:29–34.Google Scholar
- Tikku T, Khanna R, Sachan K, et al. A new proposed regression equation for mixed dentition analysis using the sum of permanent mandibular four incisors and first molar as a predictor of width of unerupted canine and premolars in a sample of North Indian population. J Orthod Sci. 2013;2:124–9.CrossRefPubMedPubMedCentralGoogle Scholar