الفهرس | Only 14 pages are availabe for public view |
Abstract Fourteen completely edentulous patients were selected from out clinic of Ain Shams University. All patients were systematically free. Medical and dental history for all patients was recorded. Extra oral examination was carried out to detect any facial disfigurement. TMJ was examined for any clicking, crepitus, or shift in movement. Intra oral examination was carried out to detect any signs of inflammation, swelling or flappy tissue. Radiographic examination to detect any bony pathosis. Conventional complete denture was constructed for all patients. Lower denture was duplicated in a clear acrylic stent to be used as radiographic stent and surgical stent after that. Panoramic radiograph was taken for all patients to detect the position of mental foramen using the radiographic stent with two metal spheres placed inside. Three holes were made in a surgical stent corresponding to the further position of the dental implants. The surgical stent was placed in patient mouth and the position of each implant was marked using suitable marker. Tissue punch was used to cut out the mucosa at the position of the implant marked previously. 1.8 mm drill was used to penetrate the bone to about one half of the threaded portion of the implant, implant was placed in the drilled site using its cap, then thumb wrench was used for more insertion force, finally torque wrench was used to finish the procedure. Suitable antibiotic and analgesic was prescribed to control any post-operative pain or infection.Later on, patients were recalled modifying their lower denture to fit over the implants. The patients were divided equally into two group. group I, patients in this group were rehabilitated by immediately loaded implant retained mandibular overdenture within 48 hours of implant placement. group II, patients in this group were rehabilitated by early loaded implant retained mandibular overdenture six weeks after implant placement. Panoramic radiograph was taken for each patient at time of insertion, at 6 months and at one year follow up intervals. Marginal bone height change around the implants was evaluated using the linear measurement software system supplied with the panoramic radiographs. The bone height was measured by measuring the distance from the alveolar crest to the implant apex. Values of linear measurements were recorded in the patient chart at every follow-up visit and from these data mean value of bone height change were calculated. Although more peri-implant bone height change for both mesial and distal aspects was detected for group I (immediate loading) compared to group II (early loading) the difference was statistically insignificant p>0.05. |