MATERIALS AND METHODS
A clinical study with before-and-after study design was conducted. Thirty mandibular edentulous elderly patients (>60 years old) were recruited from the patients visiting the University of Dental Medicine, Mandalay and from those referred by private dentists who were informed about the subject recruitment. After thorough explanation and informed consent process, OHRQoL of all participants was assessed at baseline before rehabilitation treatment by using Oral Health Impact Profile (OHIP) questionnaire.11
O-ring housing into the denture (Fig. 2). OHRQoL of all patients were assessed 2 weeks after attachment delivery. Paired
t test was employed to compare OHRQoL at baseline and after prosthodontic rehabilitation.