Zusammenfassung
Die klinische Exaktheit der Implantatinsertion mittels 3-D-Führungsschablonen liegt bei etwa 1 mm Positionsabweichung des Implantats und 5° Winkelabweichung der Implantatachse gegenüber der virtuellen Planung. Im Vergleich zur 2-D-geplanten Freihandmethode erweist sich die 3-D-basierte Technik bezüglich Implantatposition und -achsabweichung als deutlich überlegen. Die Mindestabstände zu den Nachbarstrukturen sollten auch bei Verwendung einer 3-D-Führungsschablone eingehalten werden, da auch hier von einer gewissen Ungenauigkeit ausgegangen werden muss. Bezüglich der prothetischen Zielsetzung kann festgestellt werden, dass die 3-D-Planung eine optimierte (virtuelle) Positionierung der Implantate in Relation zum geplanten Zahnersatz erlaubt und diese mittels 3-D-Führungsschablonen eine exakte klinische Umsetzung erfährt. Eine eindeutige Indikation für eine 3-D-Diagnostik vorausgesetzt, sollte regelmäßig geprüft werden, ob die Daten nicht auch für eine Führungsschablone genutzt werden können. Die Vorzüge einer geführten Chirurgie bleiben ansonsten ungenutzt.
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Nickenig, HJ. 3-D- versus 2-D-Implantatplanung. wissen kompakt 6, 3–12 (2012). https://doi.org/10.1007/s11838-012-0150-y
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DOI: https://doi.org/10.1007/s11838-012-0150-y