Accuracy of surgical templates fabricated with a CT image-guided drilling technique–A clinical study of 35 dental implants
Date Issued
2009
Date
2009
Author(s)
Shiu, Ruei-Huang
Abstract
Abstractntroduction:linically, the main goal of dental implantology is accurately positioning the dental implants completely coincided with the presurgical plan designed with an implant planning software. Accurate positioning the implants may result in improving functionality, esthetics, and biomechanical performance, as well as minimal complications. So, one of the most important factors for implant success is how to fabricate a reliable surgical template used in implant surgery. Using CT image and special software for implant planning becomes more popular and easier now. An implant planning software and a special computer-aided drilling technique to fabricate a reliable surgical template have been developed in National Taiwan University and tested in vitro.he purpose of this study was to evaluate the deviation of the axes and positions of the actual implant, placed with the aid of surgical guides fabricated with our CT image-guided drilling technique, from those of the pre-operative planned implant.aterials and Methods:hirty-five implants of 24 patients (the number of implants placed in each patient : 1~3) were included and planned on the Cone-Beam CT reconstructed images during 2007 to 2009. Prior to CT scanning, three ceramic balls were attached to the radiographic stent as reference markers to link the reconstructed CT images to the patient’s stone cast. special drilling device, controlled by a computer which transformed the coordination of planned implants on CT images to drilling parameters, was used to position the drilling guide tube on a surgical template on the stone cast. During implant surgery, all the implants were placed with the aid of guide tubes on surgical templates.fter osseointegration of the implants, a special image-fusing technique was used to compare the locations and axes of the planned and placed implants.esults: Compared with the planned implants, the actual placed implants showed mean angular deviation of 6.08°±1.44°, and mean linear deviation of 0.77±0.19mm at the neck of implants and 1.12±0.39mm at the apex of implants. The ranges of angular deviation was 2.36 ° to 8.51 °. The ranges of linear deviation were 0.42 to 1.26mm at the neck of implants and 0.22 to 1.73 mm at the apex of implants. onclusion:he data were comparable to the other studies investigating the accuracy of other surgical templates. Surgical templates fabricated with our CT image-guided drilling technique may represent a reliable means for CT guided implant surgery.
Subjects
Accuracy
Computer-aided surgical template
Cone-Beam CT guided implant surgery
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