Patients in this group received conventional maxillary and mandibular complete dentures. The patients used these dentures for 45 days. Then, the conventional maxillary denture was replaced by open faced denture with soft acryl resin wing.

Evaluated using a universal testing machine to exert a vertical dislodging force on the denture. A stainless-steel loop was attached to the geometric center of the denture using autopolymerizing acrylic resin. The center of the labial frenum (point A) and the hamular notches (points B&C) were located in the denture base. The distance halfway between points B and C was measured, and the location was marked on the posterior border of the denture base (point D). Half the distance between points A and D was marked as the denture base center (point E). A force transmission device was used to transmit the dislodging vertical force from the universal testing machine to the denture. A facebow was used to set the Frankfort plane of the patient parallel to the floor. After orienting the participant to the testing machine, it was set to exert a dislodging force at a rate of 50 mm/min. The test was repeated 3 times for each denture and the mean was calculated.

Participant satisfaction with esthetics was evaluated by using a Visual Analogue Scale (VAS). The level of satisfaction was indicated as a sign on a 10 cm VAS, labeled with (not at all satisfied) at the zero end with (completely satisfied) at the other end. The distance (mm) between the zero point and the sign marked by the patient on the 10-cm-line was measured and expressed in percentage.

Participant satisfaction with comfort was evaluated by using a Visual Analogue Scale (VAS). The level of satisfaction was indicated as a sign on a 10 cm VAS, labeled with (not at all satisfied) at the zero end with (completely satisfied) at the other end. The distance (mm) between the zero point and the sign marked by the patient on the 10-cm-line was measured and expressed in percentage.