The concept of immediate activation of dental implants was already studied in animals and in humans and a high success rate can be expected in certain circunstances. The present study was undertaken to demonstrate whether in partial and fully edentulous patients, titanium screw implants may be installed and loaded within 72 hours. The study included 27 patient and criteria similar to delayed loading was utilized. The patient had to have adequate volume and density for a minimum of 4 (10 mm) implants in the mandible and 6 in the maxilla, in addition to other requirements. After a thorough presurgical evaluation by the restorative dentist, a template and heat-cured/metal-reinforced provisional were fabricated. Following fixture installation, either the fixed provisional was placed or an impression was taken, and the provisional was seated within 72 hours. Once the temporary was placed, it remained until osseointegration was complete.Success rates similar to those in delayed loaded cases may be expected (95%). All patients went on to completion of their original prosthetic prescription. J Periodontol; 71(5):833-8, 2000 May

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