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Review
. 2013 Sep;12(3):359-64.
doi: 10.1007/s12663-012-0435-x. Epub 2012 Sep 22.

Is Pederson Index a True Predictive Difficulty Index for Impacted Mandibular Third Molar Surgery? A Meta-analysis

Amit Bali  1 , Deepika Bali  2 , Ashutosh Sharma  1 , Gaurav Verma  1
Affiliations
Review

Is Pederson Index a True Predictive Difficulty Index for Impacted Mandibular Third Molar Surgery? A Meta-analysis

Amit Bali et al. J Maxillofac Oral Surg. 2013 Sep.

Abstract

The aim of this meta-analysis was to find out the clinical reliability of Pederson index in assessing the difficulty of surgery for impacted mandibular 3rd molar. The relevant articles were selected by Hand search and electronic media (Medline, Pubmed, Embase Cochrane library, ISI web of science) from Jan 2000 to Dec 2010. All the relevant articles were properly screened and findings were extracted from the articles. Pederson index had shown low sensitivity and specificity in predicting the difficulty of surgery for impacted mandibular 3rd molar. Positive and negative likelihood ratio had also shown the unreliability of Pederson index. The meta-analysis of the current literature concluded that Pederson index is not a reliable test to predict the surgical difficulty of impacted mandibular 3rd molar.

Keywords: Difficulty assessment; Impaction; Mandibular third molar; Pederson index; Surgery.

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Figures

Fig. 1
Fig. 1
Mesioangular impaction
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Horizontal impaction
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Vertical impaction
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Distoangular impaction
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Fig. 5
Level A
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Level B
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Level C
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Class I
Fig. 9
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Class II
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Class III
See this image and copyright information in PMC

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