Conventional multi-slice computed tomography (CT) and cone-beam CT (CBCT) for computer-aided implant placement. Part II: reliability of mucosa-supported stereolithographic guides.

Clin Implant Dent Relat Res 2013 Dec 11;15(6):907-17. Epub 2012 Jan 11.

Research fellow, Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey; professor, Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey; assistant professor, Department of Prosthodontics, Gülhane Military Medical Academy (GATA), Center of Dental Sciences, Ankara, Turkey; professor, Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.

Purpose: Deviations of implants that were placed by conventional computed tomography (CT)- or cone beam CT (CBCT)-derived mucosa-supported stereolithographic (SLA) surgical guides were analyzed in this study.

Materials And Methods: Eleven patients were randomly scanned by a multi-slice CT (CT group) or a CBCT scanner (CBCT group). A total of 108 implants were planned on the software and placed using SLA guides. A new CT or CBCT scan was obtained and merged with the planning data to identify the deviations between the planned and placed implants. Results were analyzed by Mann-Whitney U test and multiple regressions (p < .05).

Results: Mean angular and linear deviations in the CT group were 3.30° (SD 0.36), and 0.75 (SD 0.32) and 0.80 mm (SD 0.35) at the implant shoulder and tip, respectively. In the CBCT group, mean angular and linear deviations were 3.47° (SD 0.37), and 0.81 (SD 0.32) and 0.87 mm (SD 0.32) at the implant shoulder and tip, respectively. No statistically significant differences were detected between the CT and CBCT groups (p = .169 and p = .551, p = .113 for angular and linear deviations, respectively).

Conclusions: Implant placement via CT- or CBCT-derived mucosa-supported SLA guides yielded similar deviation values. Results should be confirmed on alternative CBCT scanners.

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Source
http://doi.wiley.com/10.1111/j.1708-8208.2011.00435.x
Publisher Site
http://dx.doi.org/10.1111/j.1708-8208.2011.00435.xDOI Listing
December 2013
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