PMID: 9431525Feb 12, 1998Paper

A device to predict lower third molar eruption

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
I VentäP Ylipaavalniemi

Abstract

This study was designed to create a transparent device to be superimposed on a panoramic tomogram taken of a patient at age 20 years to make predictions of future eruption or impaction of lower third molars. The device was developed from data on 40 lower third molars initially retained at age 20 years; one half of these remained impacted, and the other half of them erupted by age 26 years. Tracings were made from panoramic tomograms taken at age 20 years. The critical point for prediction in the overlay was the intersection of a horizontal reference line and the anterior border of the ascending ramus. To estimate this critical separation line, Bayes' Decision Theory was used. The sum of false negatives and false positives was least at a distance of 14.5 mm from the distal surface of the second molar. Mesial from this point, the probability of impaction was 76%; distal from this point, the probability of eruption was 72%. Tested against 35 initially unerupted lower third molars, the predictions made by the device and the actual clinical findings were in conformity in relation to 97% of the test teeth. It could thus be concluded that the method was simple to use and may prove a good addition for predicting lower third molar devel...Continue Reading

References

Oct 1, 1975·British Journal of Orthodontics·M Richardson
Aug 1, 1991·Oral Surgery, Oral Medicine, and Oral Pathology·I VentäP Ylipaavalniemi
Feb 1, 1985·European Journal of Orthodontics·H SvendsenA Björk
Aug 1, 1984·American Journal of Orthodontics·E R RichardsonK Semenya
Dec 1, 1993·Oral Surgery, Oral Medicine, and Oral Pathology·I Ventä

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Citations

Dec 29, 2010·European Journal of Orthodontics·E S J Abu AlhaijaS N AlKhateeb
Jan 15, 2013·The Angle Orthodontist·Cağrı Türköz, Cağrı Ulusoy
Aug 25, 2012·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Irja Ventä
Mar 23, 2011·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Raahib DudhiaRichard J Wilson
Oct 13, 2011·ISRN Dentistry·Siddharth GuptaSonal Saxena
Feb 7, 2004·Acta Odontologica Scandinavica·Ari RajasuoHeikki Murtomaa
Jun 13, 2001·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·I Ventä, S Schou
May 11, 2005·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Sumeet Sandhu, Tejinder Kaur
Mar 15, 2000·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·I VentäL Turtola
May 30, 2020·International Journal of Environmental Research and Public Health·Myrthel VranckxReinhilde Jacobs

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