This study aimed to analyze changes in Dental Impact on Daily Living (DIDL) scores in patients who had no prosthesis, a nonfunctioning prosthesis, or an acrylic resin prosthesis after providing them with a telescopic crown-retained partial denture. DIDL scores were recorded in 98 patients prior to and 6 to 24 months after treatment. All DIDL scores (overall and dimension scores) increased significantly after treatment. Results were only slightly affected by gender and age. Patients with fewer teeth benefited more than those with more teeth. Within the limitations of this study, the results show that a telescopic crown-retained partial denture can improve patients' oral health-related quality of life.