الفهرس 
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Abstract
- Fourteen male patients with Kennedy class II modification 1 maxillary partial edentulism were selected to share in this study from the out-patient clinic of Prosthodontics Department, Faculty of Dentistry, Ain shams University according to the following criteria:
- Residual bone height below the maxillary sinus of 6-8 mm and width 5-6mm, requiring internal sinus lifting to gain additional 2-3mm increase in the bone height to accommodate dental implant 8-10 mm length and 4.2mm diameter.
- A pre-operative Cone Beam Computed Tomography (CBCT) was taken for each patient, to evaluate the presence of6-8 mm and width 5-6mm, requiring internal sinus lifting to gain additional 2-3mm increase in the bone height to accommodate dental implant 8-10 mm length and 4.2mm diameter at the second molar area.
- Sinus floor was examined along with the lining soft tissue of the sinus walls to detect any signs of infection, congestion, effusion or thickening of the sinus membrane.
- Clinical steps:
• The stent was introduced into the patient’s mouth to serve as a guide for the osteotomy site.
• Osteotomy was made to the final diameter but 2mm below the sinus floor.
• Trans-alveolar sinus lifting was made by means of push osteotomes to elevate the sinus floor and membrane 2-3mm above their previous level accommodating the implant.
- Patients sharing in this study were divided into two groups:
In group A, patient will only receive bone graft condensed to the sinus. While, for group B, patient will receive bone graft mixed with PRGF and condensed into the sinus through the osteotomy.
The implant was installed with the healing collar and primary closure was done around implants by sutures.
RFA reading were measured for each implant every 2 months for 6 months following insertion.
After the healing period and attaining the appropriate degree of implant stability an implant supported partial denture was constructed for each patient.