Eine Untersuchung zur Genauigkeit von dreidimensional, durch CT/DVTgeplanten Bohrschablonen für die Insertion von Implantaten in den Kieferknochen. In-vitro Studie an Humankiefern
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Philipps-Universität Marburg
Abstract
The aim of this study of native
human manibles was to investigate the accuracy of
three-dimensional, CT (computer tomography) and CBCT
(conebeam tomography) planed positions of dental implants
using special radiological and surgical templates. The
examination was carried out on 6 native human mandibles, 22
implants (Osseotite®, BIOMET 3i, Palm Beach Gardens, Florida,
USA, n=16 / MKII , Nobel Biocare, Zürich, Switzerland, n=6)
were placed. After acquiring the radiological image data (CT:
Prospeed® SX Power, Fa. GE-Medical Systems, Solingen,
Germany, DVT: 3DX Accuitomo®, J. Morita Mfg. Corp., Kyoto,
Japan) the tubes contained in the template were used as
reference for planing the implant positions with a
planning-software (coDiagnostiX®, IVS Solutions AG, Chemnitz,
Germany). The tube position was then changed by using a
special drilling machine (AME 5®, Dental Labor Jacob GmbH,
Marburg, Germany) according to the plan. In this way the
radiologic template was converted into a surgical template.
After the insertion of the implants CT and CBCT images were
acquierd again and then superimposed with the planning data
with a special software (VoXim®, IVS Solutions AG, Chemnitz,
Germany). Variations in planed and actually implants were
measured. The mean deviations referring to the implant base
was 1,32mm ± 0,56 and 1,59mm ± 0,67 at the tip of the
implant. Mean deviation of implantaxis was 5,69° ± 3,1. The
usage of CT data compared to CBCT data revealed no
significant difference in accuracy of positioning implants.
Accuracy of placing the tubes in the template has no
significant effect on accuracy of implantpositions in this
study. Overall, the system of three-dimensional dental
implantplanning and transferring to the surgical side used in
this study seems to be a reliable tool. However, in order to
prevent anatomical structures from damage a safe distance of
about 2mm should be maintained.
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This item has been published with the following license: In Copyright