- Defining the damages to abutment teeth after 18 months of using a removable partial denture, 89, 3% abutment teeth have not increased the mobility at the degree level, 10.7% of the abutment teeth show bone resorption - Evaluating the effect of the removable partial denture on the bone resorption of the dental arch after 18 months: 7.4% of dentures caused the bone resorption of the dental arch at the level of above 2 mm, which required denture liners.