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Here an interesting study regarding 3D implant planning ...
Accuracy of implant placement based on pre-surgical planning of three-dimensional cone-beam
images: a pilot study
Van Assche N, van Steenberghe D, Guerrero ME, Hirsch E, Schutyser F, Quirynen
M, Jacobs J Clin Periodontol 2007; 34: 816–821.
Abstract
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: 10–15 mm) showed an average angular deviation of
2.1 (SD: 0.8, range: 0.7–4.01) as compared with the planning, while the mean linear
deviation was 1.1mm (SD: 0.7 mm, range 0.3–2.3 mm) at the hex and 2.0mm (SD:
0.7 mm, range 0.7–2.4 mm) at the tip.
Conclusions: Cone-beam images could be used for implant planning, taking into
account a maximal 4.1 angular and 2.4mm linear deviation at the apical tip.
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