Date of Completion


Embargo Period



John R. Agar DDS, MA, Thomas Taylor DDS, MSD, Arthur R. Hand DDS

Field of Study

Dental Science


Master of Dental Science

Open Access

Campus Access


For decades, removable dental prostheses in the maxilla have been a conventional option for rehabilitation of maxillary edentulism. Implant dentistry has recently offered more options in restoring function and esthetics of completely edentulous populations. Patients may be offered an alternative to tissue borne removable prostheses by having an implant-retained/supported prosthesis. However, a dilemma in the decision-making process for the choice of implant-supported prostheses is the potential absence of artificial lip support.

The aim of this project is to study the differences in subjective responses of dentists and lay people to lip support/lip projection related to maxillary prostheses when they were ublinded to the objectives and methodology of the study.

Sixty judges (15 prosthodontists, 15 general dentists and 30 lay people) were recruited to evaluate patients’ images wearing dentures with and without denture labial denture flanges. Visual analog scale and triangle test were used for the evaluation.

The results show that there was difference in subjective perception of lip projection with and without labial denture flanges amongst lay people, general dentists and prosthodontists judges. The mean rate of correct identification of flangeless images in profile views was higher than frontal views. Both mentioned differences were statistically significant but clinically insignificant due to the small magnitude of differences. There was no statistically significant difference in the ability to correctly identify the images of flangeless dentures among judges until comparison was made between lay people and prosthodontists judges.

Major Advisor

Avinash S Bidra, BDS, MS, FACP