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Table 5 Characteristics of the four selected tooth wear evaluation systems (viz., Eccles index, Tooth Wear Index [TWI], Lussi index, and Basic Erosive Wear Examination [BEWE]), and of the hypothetical, broadly applicable, tooth wear evaluation system (h-TWES)

From: A plea for the development of an universally accepted modular tooth wear evaluation system

Characteristics Evaluation systems
Eccles TWI Lussi BEWE h-TWES
Tooth wear subtypes
 tooth wear   x    x
 mechanical      x
 chemical x   x x x
Possible overestimating chemical wear x   x x  
Assessment mode
 chair-side x x x x x
 dental casts   x   x x
 photographs x x   x x
 scans      x
Purpose
 screening     x x
 diagnosing x x x x x
 monitoring     x x
Cluster of teeth
 partial assessment     x x
 full assessment x x x   x
Surfaces
 occlusal x x x x x
 incisal x x x x x
 palatal/lingual/oral x x x x x
 buccal/labial/facial x x x x x
 cervical   x    
Determining
 cumulative     x  
 separate x x x   x
Type of scale
 ordinal x x x x x
 nominal      
Direction of assessment
 surface area x x x x x
 depth x x x x x
Amount of Subscales and/or descriptions
 1     x x
 2    x   x
 3   x    
 4 x     
  1. (x = meets the required characteristics)