Evaluating the Accuracy of Dental Space Prediction as a Simple Visual Observation Compared to the Standard Prediction Method in Mixed Dentition Period

Abbas Salehi-Vaziri, Mojtaba Sabzijati, Mohsen Nuri-Sari, Mohsen Merati, Mahdi Rahbar, Hannaneh Karimi


Background: Investigating and analyzing the dental artery space during a mixed dentition period is very important because it is used in orthodontic treatments planning. The main purpose of this study is to compare the standard Tanaka-Johntson method and simple visual observation in the space analysis in a mixed dentition period and realizing the accuracy of the simple visual observation. Methods Materials: The present study follows a double blind cross-sectional study. Three patients who were in the mixed compare period were selected and six samples were collected from the upper and lower Maxilla duplicate casts. Data were analyzed using ICC and correlation and paired t-test with SPSS 22 software. Results: The general analysis result of the estimated sizes by specialists and residents and the obtained sizes from the Tanaka-Johntson method shows only 28% of the agreement between these two methods. The announced agreement for the sizes was 31% by residents and 22 % by specialists. According to the obtained data, the average difference between specialists and residents was at least one hundredth of a millimeter and the maximum difference was ninety-seven hundredths of a millimeter. Conclusion: The results of the present study show that the estimation of space difference in a simple visual observation method has not an acceptable accuracy in comparison with the Tanaka-Johntson method. In addition, the conducted estimations by residents were also slightly more accurate than that of the specialists.


Space Analysis, Tanaka-Johnston Equation, Mixed Dentition Period Visual Estimation

Full Text:



Black GV. Descriptive anatomy of human teeth. 1st ed. Philadelphia: SS White Dental Manufacturing; 1902.

W. R. Profit, H. W. Fields, D. M. Sarver, “Contemporary Orthodontics," Fourth Edition, 2007 MOSBY ELSEVIER, ISBN-13: 978-0-323-04046-4, 751 Pages.

Tudeh Zaem Mohammad Hussein; Yasayi, Soghra; Tabatabaei, Zohreh; Rahmani Shahriari, Fatemeh. Comparison of new equation comparison with Tannaka-Johnston equation for predicting mesiodistal width of canine and uncontained permanent premolars. Journal of Shaheed Sadoughi University of Medical Sciences, Yazd, Iran. Volume 20, Issue 6, February and March 2012, p. 770 - 777.

Khanemasjedi, Mashala, Basir Leila. Determination of regression equation for estimating the size of uncontained canines and premolars in Ahwaz city. Journal of Dental School, Shahid Beheshti University of Medical Sciences, Volume 24, Number 3, Autumn 2006, pp. 320 -327.

Arash, Waliollah, Mirkazemi, Arash. Determination of space required for canin and premolar tooth extraction in mixed dentition using mesiodistal width of lower incisors. Journal of Babol University of Medical Sciences, Vol. 6, No. 4 (Continued from 24), Autumn 2004, Page 30 - 33.

Chaitali Umesh Hambire, Sunanda Sujan. Evaluation of validity of Tanaka Johnston analysis in Mumbai school children. Contemporary Clinical Dentistry | Jul-Sep 2015 | Vol 6 | Issue 3, pp 337-340.

Rajesh Gyawali, Basanta Kumar Shrestha and Rajiv Yada. Mixed dentition space analysis among Nepalese Brahmins/Chhetris. BMC Oral Health (2017) 17:36, pp 1-7.

Ranjit O Pawar, Shweta R Bhat. Prediction of Mesiodistal Width of the Mandibular Permanent Canines and Premolars by Utilizing the Mesiodistal Width of Mandibular First Permanent Molars and Incisors. International Journal of Scienti fi c Study | March 2016 | Vol 3 | Issue 12, pp 178-183.

Abhijeet Kadu, S. M. Londhe, Prasanna Kumar, Sanjeev Datana, Madhu Singh, Neetu Gupta. Estimating the size of unerupted canine and premolars in a mixed Indian population. Journal of Dental Research and Review, May-Aug 2014, Vol. 1, Issue 2, pp 62-65.

Namitha Ramesh, Mora Sathi Rami Reddy, Biswas Palukunnu, Balakrishna Shetty, Ushass Puthalath. Mixed Dentition Space Analysis: A comparison of two methods. Journal of Clinical and Diagnostic Research. 2014 Sep, Vol-8(9): pp 01-06.

Ibad Ullah Kundi, Farhan Dil, Amjad Shah, Ulfat Bashir. Applicability of Tanaka and Johnston mixed dentition analysis in a contemporary Pakistani population. Pakistan Oral & Dental Journal (August 2012), Vol 32, No. 2, PP 253 - 259.

R Tootla and Stephen Alan Fayle. Comparison of two methods of space prediction in the mixed dentition. Pediatric dentistry 25(4):350-356 • July 2003.

Kallaya Wangpichit, Noelle L. Huntington, Jon T. Kapala. Comparison of three nonradiographic methods of mixed dentition analysis in cleft lip and palate patients. American Academy of Pediatric Dentistry. (2001) 23:6, pp 147-152.

DOI: https://doi.org/10.7575/aiac.abcmed.v.6n.2p.19


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

2013-2023 (CC-BY) Australian International Academic Centre PTY.LTD.

Advances in Bioscience and Clinical Medicine