Rugae support

Using the major connector to cover the rugae area is considered to assist with indirect retention. In distal extension partial dentures, the rugae area is both appropriate for indirect retention as it has a firm nature (Figures 4-8).

It should be kept in mind that tissue support is less effective than tooth support, even if it is acknowledged that substantial coverage of the ridge area will provide some support. Furthermore, phonation issues may arise from plate covering the rugae area. However, when using an indirect retainer in the more anterior location is not feasible and  canine teeth are the primary abutments, rugae support is required.