الفهرس 
Review of LiteratureOnly 14 pages are availabe for public view
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Abstract
The research presented in this study evaluated the Effect of Fabrication Techniques of Implant Supported Prosthesis with Two Span Lengths on Vertical Marginal Adaptation before and after cyclic loading Two models of epoxy resin were constructed with two embedded implants in both of them. One was simulating the clinical situation of missing lower second premolar and the other simulating the clinical situation of missing lower second premolar and lower first molar. Thirty bridges (15 on each model) were constructed from three different materials (10 veneered zirconia bridges, 10 PFM bridges and 10 temporary bridges). The zirconia and wax frameworks were constructed using CAD/CAM technique as well as the temporary bridges. Veneering of zirconia and metal frameworks was done using manual build up technique. The bridges were temporarily cemented on their corresponding models, and marginal adaptation of cemented bridges evaluated using stereomicroscope. Each sample were individually seated on the master model (1, 2) and vertically mounted in the lower fixed compartment of a computer controlled materials testing machine with a load cell and data were recorded using computer software.
The samples underwent pre-loading in a cyclic manner. Each sample underwent 100,000 cycles at loads 200 N with a load profile in the form of a 2 Hz. Force was applied with a custom made load applicator attached to the upper movable compartment of the machine.
Summary & Conclusions
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Vertical marginal adaptation of all aged samples (Samples subjected to cyclic loading) wasreevaluated using the same previously mentioned procedure. Then the data obtained were collected, tabulated and then subjected to statistical analysis. Conclusion: Within the limitations of the present study the following conclusions could be drawn:-
Fabrication techniques and type of materials used influenced the marginal fit of implant supported prosthesis.
Cyclic loading negatively affected the vertical marginal fit of all samples.
Ceramill Temp (acrylic resin) implant supported bridges showed the lowest vertical marginal adaptation compared to Zirconia and metal-ceramic restorations.
All bridges of different materials and fabrication techniques were within clinically acceptable marginal adaptation range.
In this study span length has a non-significant effect on vertical marginal adaptation