European Archives of Paediatric Dentistry

, Volume 15, Issue 6, pp 401–405 | Cite as

Predicting the size of unerupted canines and premolars using primary maxillary first molar

  • S. Mokhtari
  • I. Sanati
  • N. ShafizadehEmail author
  • B. Seraj
  • B. Khosravanifard
Original Scientific Article



One of the most important aspects of interceptive orthodontic diagnosis and treatment planning is space analysis. To date all methods use the size of permanent teeth to predict the dimensions of unerupted teeth. The aim of this study was to predict the permanent teeth size using maxillary primary first molar.


The size of primary maxillary first molars and permanent canines and premolars of 80 subjects was measured on their dental casts. Regression equations were determined between the size of primary maxillary first molars and permanent canines and premolars.


The new regression equations for predicting permanent tooth size in the maxilla and mandible were, respectively, \( Y = 2.2X + 13 \) and \( Y = 2.4X + 9.5 \) among females and \( Y = 2.7X + 5.5 \) and \( Y = 2.4X + 9.5 \) among males.


The results show that the primary maxillary first molar size can be used to predict the size of unerupted permanent teeth.


Prediction Deciduous tooth Tooth size Odontometry 


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Copyright information

© European Academy of Paediatric Dentistry 2014

Authors and Affiliations

  • S. Mokhtari
    • 1
  • I. Sanati
    • 2
  • N. Shafizadeh
    • 3
    Email author
  • B. Seraj
    • 4
  • B. Khosravanifard
    • 5
  1. 1.Department of Pediatric Dentistry, Dental SchoolShahid Beheshti University of Medical SciencesTehranIran
  2. 2.Pedodontist, Private PracticeTehranIran
  3. 3.Department of Pediatric Dentistry, Tehran Dental BranchIslamic Azad UniversityTehranIran
  4. 4.Department of Pediatric Dentistry, Dental SchoolTehran University of Medical SciencesTehranIran
  5. 5.Department of Orthodontics, Tehran Dental BranchIslamic Azad UniversityTehranIran

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