الفهرس 
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Abstract
Aim: The aim of this study was to compare the accuracy of implant placement when using tooth
supported surgical guide with different distributions of support manufactured by DLP (Digital Light
Processing) technique.
Methodology: Twenty four replica implants were inserted in twelve partially edentulous maxillary
resin casts. implant placement was done using static DLP printed surgical guides. Three designs of
surgical guides were designed representing different number and distribution of support (unilateral
tooth support), (bilateral tooth support), and (full arch tooth support). After implant placement;
accuracy measurements were done using (blue sky bio software) by superimposing the actually
placed implants with the virtually planned implants.
The deviations between placed and planned implants were then measured according to the following
definitions:
The global deviation which was divided into vertical (depth deviation), and lateral deviations
according to the longitudinal axis of the planned implants. Moreover, the lateral deviation was further
divided into mesio-distal and bucco-lingual deviations and angular deviation.
Results: In the present study the most accurate group was bilateral tooth supported group as
bilateral distribution of support was found to offer similar accuracy that achieved by full-arch guides
but for unilateral tooth supported group not considered the best support for surgical.
The study also showed the effect of added fixation screw in the edentulous area which directly
express the effect of reducing bending of the unsupported part of the surgical guides.
Conclusion 1-Using bilateral tooth support offer same accuracy of full arch guides. On the other hand
using unilateral tooth support not considered to offer the best support for surgical guides compared to
similar number of support in free end saddle cases. 2-Regarding single tooth replacement in distal
extension cases, using unilateral support resulted in higher significant deviation value which considered
the maximum limit of the permitted errors.
Keywords: Surgical guide, CAD\CAM, Implant, Accuracy, 3D printing.