Diagnostic accuracy of tooth mineralization in growth spurt determination using modified middle phalanx (MP3) as a gold standard

Umar Hussain; Ali Ayub; Afeef Umar Zia; Muhammad Kamran; Ghulam Rasool

Diagnostic accuracy of tooth mineralization in growth spurt determination using modified middle phalanx (MP3) as a gold standard

Authors

Umar Hussain BDS, FPCS, MS; Lecturer, Saidu College of Dentistry, Swat, Pakistan.
Ali Ayub BDS, FPCS, Associate Professor, Orthodontics, HBS Medical and Dental college, Islamabad.
Afeef Umar Zia BDS, FPCS, M.Orth RCSEd; Professor & Head of department Orthodontics, Margalla institute of Health Sciences, Pakistan.
Muhammad Kamran BDS, FPCS; Assistant professor, Saidu College of Dentistry, Swat, Pakistan.
Ghulam Rasool BDS, MCPS, FPCS, MHPE; Dean and Principal of Rehman College of Dentistry, Peshawar, Pakistan.

Keywords:

Growth spurt, mandibular second molar calcification, modified middle phalanx

Abstract

Introduction: was to determine diagnostic accuracy of tooth mineralization in growth spurt determination using modified middle phalanx (MP3) as a gold standard.

Material and Methods: This cross sectional (Diagnostic) study was conducted on 150 cases. Panoramic radiographs were assessed according to the Dermirjian's stages of dental calcification of mandibular second molar of right side. Digital radiographs of the middle phalanx (MP3) were taken using the procedure described by Abdel-Kader. The inclusion criteria were age from 8 to 16 years, Pakistani national, and both genders. Children with previous history of orthodontics treatment, Systemic disease, congenital anomalies of teeth, history of trauma or surgery in the neck or dentofacial region were excluded. Intra and inter-observer reliability was assessed through Cohen’s Kappa statistics. Sensitivity, specificity positive predictive value, and negative predictive value were calculated. P ? 0.05 was considered significant.

Results: The age range was 8 to 16 years with a mean of 11.56±2.26 year. The correlation between tooth calcification and MP3 stages was high (r=0.705) and very highly statistically significant (P<0.001). Most of the stages of mandibular second molar mineralization had low diagnostic accuracy but only stage F show high diagnostic accuracy (80.67%; 95% CI=73.43, 86.65).

Conclusions: The Stage F of second molar has relatively high diagnostic accuracy for detecting growth spurt.