WEDGE-SHAPED DENTAL DEFECT IN LEPROSY PATIENTS

Abstract

Round, wedge-shaped, groove-like and other forms of parenchymal defects in the cervical region of labial and buccal surface of the incisors, canine, premolar and morals are often observed in leprosy and in other chronic conditions. The cause however differs basically from dental decay. The rate of occurrence is rather high and it is found in about 25% of the patients. The incidence is higher in the upper jaw and in the male but there is no difference according to the type of leprosy and it is found more often in the elderly case. The color differs according to the stage varying from almost white initially to yellow and crown. Subjective complaints are present initially but disappear later.
Various theories have been advanced as to the cause but it is suggested that decalci-fication occurs due to acid salts produced in the mouth and the defect develops by the mechanical action, e. g. brushing the teeth.
Histologically, the tooth is filled with calcium salt which forms an opaque zone along the entire length and the lucid zone present in dental decay is not found. The different coloration is due to deposition of pigment on the opaque layer.