Accuracy of implant placement based on pre-surgical planning of three-dimensional cone-beam images: a pilot study
: Blackwell Synergy
Aim: To evaluate the precision of transfer of a computer-based three-dimensional
(3D) planning, using re-formatted cone-beam images, for oral implant placement in
partially edentulous jaws.
Material and Methods: Four formalin-fixed cadaver jaws were imaged in a 3D
Accuitomo FPDs cone-beam computed tomography (CT). Data were used to produce
an accurate implant planning with a transfer to surgery by means of stereolithographic
drill guides. Pre-operative cone-beam CT images were subsequently matched with
post-operative ones to calculate the deviation between planned and installed implants.
Results: Placed implants (length: 10Ã¢â‚¬â€œ15 mm) showed an average angular deviation of
21 (SD: 0.8, range: 0.7Ã¢â‚¬â€œ4.01) as compared with the planning, while the mean linear
deviation was 1.1mm (SD: 0.7 mm, range 0.3Ã¢â‚¬â€œ2.3 mm) at the hex and 2.0mm (SD:
0.7 mm, range 0.7Ã¢â‚¬â€œ2.4 mm) at the tip.
Conclusions: Cone-beam images could be used for implant planning, taking into
account a maximal 41 angular and 2.4mm linear deviation at the apical tip.
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