Page 12 - Contributed Paper Session (CPS) - Volume 8

CPS2144 Laura Antonucci et al.

Accuracy of tomographic scan-derived implant
placement
1
Laura Antonucci , Corrado Crocetta , Filiberto Mastrangelo , Anna Eleonora
1
2
3
3
Carrozzo , Luigi Salmaso
1 Department of Clinical Science & Dentistry, University of Foggia, Italy
2 Department of Economics, University of Foggia, Italy
3 Department of Management and Engineering, University of Padova, Italy

Abstract
This paper analyses the accuracy of a computer-guided template-based
implant dentistry by comparing implant position in the virtual project and the
actual reached in the bones. We have studied 23 healthy patients subjected
to an implant surgical session with the insertion of implants with an external
connection. Our Data do not follow a (multivariate) normal distribution and
they are not obtained by a well-defined sampling procedure, for this reason,
we used a nonparametric procedure based on permutation tests and
nonparametric combination.

Keywords
Computer-guided implant dentistry; permutation tests; nonparametric
combination; multivariate analysis.

1. Introduction
In dentistry there is a growing interest in new treatments with a reduced
number of implants, designed to support fixed prostheses with high aesthetic
and functional results. The standard protocol for implant surgery is often
based on a diagnostic phase entrusted to radiographic examination and by a
clinical examination of the edentulous maxillary bone sites. Two dimensional
radiographic examination does not provide an accurate analysis of the bone
structures and, consequently, they do not allow to acquire sufficient data for
the functional and esthetic design of the implant-prosthetic complex.
An accurate before intervention analysis of the patient's stomatognathic
apparatus can be very useful. In this paper we consider a new method for the
flapless positioning of endosseous implants in the edentulous patient with the
aid of surgical mucosal support and computer guided techniques, based on
diagnostic 3D imaging, able to measure the bone volume available for implant
surgery, its quality and possible anatomical variations. Thanks to the matching
of images of prostheses acquired through optical scanners and three-
dimensional radiological images it is possible to study the virtual prosthetic
rehabilitations of the patients. Proper virtual planning allows to accurately

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