The evolutionary cycle has selected a masticatory system which is functionally efficient using natural teeth and an omnivorous diet. This system would be designed in a totally different fashion if it were selected based on the model of the complete denture wearers. Dentures are rigid pieces of acrylic resin which are shaped to fit the soft tissue covering of the jaws and be compatible with the functioning and ever changing oral environment. No denture regardless of how well it is constructed can overcome the limitations of the foundations on which it is placed. In day to day practice we encounter many patients for whom an ideal treatment from prosthodontic point of view is not possible without restoring to pre-conditioning of the oral tissues by means of surgical procedures and hence these procedures constitute the pre-prosthetic surgical preparation.