Comparison of Root Resorption in Primary Mandibular Molars in Radiograph and Actual Resorption

The eruption of the primary dentition, their exfoliation due to root resorption, and then the eruption of the permanent dentition follow in an orderly sequence. After the apices close, initial resorption starts between one and three years later, and exfoliation happens about three years later.Radiographs of primary lower molar teeth among children in the age group 5 to 12 years were taken. Age Groups were divided into less than 8 years, 8 to 9 years, 10 to 11 years and 12 years or more from 2020 to 2023 around 250 patients data were collected. Digital radiographs (RVG) of the primary mandibular molar were used to measure the resorption in EZ DentI software. In the actual extracted tooth, the root resorption was measured with a scale from CEJ of the tooth to the resorbed apex for the mesial root & distal root respectively. Based on results obtained in the radiograph, the number of 79 teeth had < ¼ resorption, 86 teeth had ¼-¾ resorption and 85 teeth had > ¾ resorption. In actual teeth, the number of 75 had < ¼ resorption, 85 had ¼-¾ resorption and 90 had > ¾ resorption. The resorption was symmetrical in 115 teeth, maximum in the mesial root was seen in 75 and the maximum in the distal root was seen in 60. When comparing root resorption in IOPA to actual root resorption, there was not much of a difference in the degree of resorption.