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Original Research

Open Access

Maturation of the Middle Phalanx of the Third Finger: A Comparative Study between Right and Left Hand

  • Antonio Gracco1
  • Giovanni Bruno1
  • Alberto De Stefani1,*,
  • Laura Siviero1
  • Alessandro Perri1
  • Edoardo Stellini1

1Department of Neurosciences, School of Dentistry, University of Padua, Italy

DOI: 10.17796/1053-4628-42.2.14 Vol.42,Issue 2,March 2018 pp.161-165

Published: 01 March 2018

*Corresponding Author(s): Alberto De Stefani E-mail:


Objectives: Recently a classification of patient's skeletal age based on the phalanx maturation, The Middle Phalanx Maturation of the third finger (MPM) method, was suggested. The aim of this study is to evaluate if there is a difference in MPM between the right and left hand. Study design: Two hundred fifty-four patients were obtained from the Complex Operating Unit of Orthodontics of Padua University Hospital. The total sample size has been selected by appropriate statistical calculations resulting in 130 patients. It was decided to further double the sample size of a previous study to ensure a robust statistical analysis. Radiographs of the right and left were obtained using the MPM method. Stages were compared using the right hand as a reference. The statistical analysis (Fisher exact test) was performed for the entire sample and related to gender in order to compare the right and the left hand stages. Results: In MPS2, 6 out 49 (12.2%) males and 7 out 27 females (25.9%) showed MPS3 in the left hand (p-value < 0.05). In all other stages, a total agreement (100%) was found. Conclusion: The authors confirm the use of the right hand as reference. In patients with MPS2 an additional radiograph on the left hand can be taken in order to increase the diagnostic accuracy. In all other stages other radiographs are not needed as a total agreement between the right and left hand was found.


skeletal age, orthodontics, middle phalanx maturation

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Antonio Gracco,Giovanni Bruno,Alberto De Stefani,Laura Siviero,Alessandro Perri,Edoardo Stellini. Maturation of the Middle Phalanx of the Third Finger: A Comparative Study between Right and Left Hand. Journal of Clinical Pediatric Dentistry. 2018. 42(2);161-165.


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