Evaluation of accuracy of computer‐aided intraoperative positioning of endosseous oral implants in the edentulous mandible

Abstract

The overall accuracy of a novel surgical computer-aided navigation system for placement of endosseous implants was evaluated. Five dry cadaver mandibles were scanned using high resolution computed tomography (HRCT). The position of four interforaminal dental implants was planned on the computer screen and transferred to the cadaver mandibles using VISIT, a surgical navigation software developed at the Vienna General Hospital. The specimens were HRCT-scanned again to compare the position of the implants with the preoperative plan on reformatted slices after matching of the pre- and postoperative data sets using the mutual information technique. The overall accuracy was 0.96 +/- 0.72 mm (range 0.0-3.5 mm). No perforation of the mandibular cortex or damage to the mandibular canal occurred. We conclude that computer-aided implant surgery can reach a level of accuracy where further clinical developments are feasible.

Guided implant surgery on oral cancer patients: in vitro study

“…Some are invasive [6,18], with a bone anchor (bone screws, pins) and others are non-invasive [19] but less precise (anatomical markers, adhesive markers, markers inside the template). The X-cube is very interesting because of its precision, its non-invasiveness and its ability to be adapted to another system.…”

Case Report: The Clinical Application of a Surgical Navigation System for Implant-Prosthetic Rehabilitation of the Patient with Maxillary Lateral Incisors Agenesis

“…An experienced surgeon with appropriate knowledge and skills is able to evaluate whether the applied position of a drill is clinically acceptable and can make a correction of an already prepared plan (if necessary). In the case of indirect navigation, the use of templates limits a surgical procedure and the surgeon is not able to make any modifications [19][20][21]. Scientific and clinical investigations carried out on patients confirmed a mean linear accuracy of implant positioning in the IGI system which was less than 1 mm on the level of the implant neck and its apex and mean angular deviation was less than 4 degrees on condition that implantation was unrestricted by surgical templates equipped with faucets for implant insertion [22,23].…”

Neue Verfahren in der computergestützten dentalen Implantologie

“…Diese werden dann den präopera-tiven CT-Daten angeglichen [9,12]. Somit lässt sich die postoperative Situation mit der präoperativen vergleichen [5,10,13,23,24,25].…”