Abstract
It has been on the rise to address severe mandibular ridge resorption by using two implant overdenture in cases of patients with edentulous jaw since Macgill consensus． In particular, it is believed that use of implant may increase remarkably for patients with disorders falling under Level Ⅲ and Ⅳ of a case classification defined by Japan Prosthdontics Society． With a denture formation that just relies its support and retention on implant, however, poor prognosis has been observed in some cases． In addition, implant can’t be selected in many cases due to such reasons as systemic diseases associated with super-aged society． There is no choice for us but to rely on conventional complete denture to address such cases leaving indispensability of acquiring denture formation without implant．In a case of patient with exposure of mental foramen at the top of residual ridge associated with severe mandibular ridge resorption in addition to recognized appearance of divulsion part of mandibular canal, we were able to achieve support, retention,muscular retention and balance of occlusion of denture by re-constructing a functional occlusion system based on treatment dentures introducing the whole residual ridge mucosa as its support area, resulting in preferable result． Therefore, we report the case with upper and lower complete dentures．
