Factors influencing risk for lesion development should also be taken into account:
Bodily position of the tooth
Orientation - rotation, eruption, tilt, drift, inclination, interocclusal relation
Periodontal attachment - recession, pocketing, exposure of cemental surfaces
Coronal structure - fracture, hypomineralisation, hypomaturation, colour, surface detail
Loss of coronal tissues - abrasion, abfraction, erosion, attrition
Restorations - what, where, when, why (site, extent)
Prosthesis - retention, stability, support, design, age