Dental prosthesis can cause an increase in the accumulation of plaque bacteria that could lead to progression of periodontal disease; but if patients have effective oral hygiene maintenance and regular check-up visits, this increase in plaque bacteria could be prevented. Defective removable partial dentures (RPD’s) and certain design features could lead the progression of periodontal disease. This article reports a case of faulty prosthesis affecting the periodontal health which was fabricated by the local dentist.