Evaluation of the fabrication deviation of a kind of milling digital implant surgical guides.
- Author:
Jin You CHAI
1
;
Jian Zhang LIU
1
;
Bing WANG
2
;
Jian QU
2
;
Zhen SUN
2
;
Wen Hui GAO
2
;
Tian Hao GUO
2
;
Hai Lan FENG
1
;
Shao Xia PAN
1
Author Information
1. Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.
2. Dental Laboratory, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.
- Publication Type:Journal Article
- MeSH:
Computer-Aided Design;
Cone-Beam Computed Tomography;
Dental Implantation, Endosseous;
Dental Implants;
Imaging, Three-Dimensional;
Reproducibility of Results;
Surgery, Computer-Assisted
- From:
Journal of Peking University(Health Sciences)
2018;50(5):892-898
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To evaluate the deviation of digital implant surgical guides during fabrication process in the Organical Dental Implant (ODI) system.
METHODS:This study included two parts. The first part was the in vitro study. A resin block with a diagnostic template was used for the planning. After cone beam computed tomography (CBCT) scanning, a surgical guide with eight implants was virtually designed using the ODI system. The guide was milled by a 5-axial numerical controlled milling machine, and an optical scanning was taken to digitalize the guide to a standard tessellation language (STL) form. The STL data were then imported into an ODI software and registered with the original design. The deviation of the sleeves between the design and the STL was measured in the ODI software and set as the golden standard. Then the ODI examination table was used to measure the deviation of the guide during fabrication. Examiners A and B measured 10 times separately. The reliability and the validity of the examination table was calculated. The second part was the in vivo study: The deviation during fabrication of 12 guides designed and fabricated by the ODI system were measured using the examination table.
RESULTS:The standard deviation of the deviation measured using the examination table by examiners A and B were all below 0.40 mm (for the shell reference points) and 0.71 degree (for the angles). No significant difference was found between the two examiners for any implant sites. The result of the examination table was larger than that of the software for the shell reference point (t-test, P<0.05), but no significant difference was found for the angle deviation (t-test, P>0.05). The 45 implants positions in the 12 guides for the in vivo study were examined using the examination table. The deviations at the shell reference points were (1.06±0.29) mm (0.42-1.75 mm), and at the implant tip were (1.12±0.48) mm (0.41-2.44 mm). The angle deviations were (1.42±0.70) degree (0.29-2.96 degree).
CONCLUSION:Deviation is unavoidable during the fabrication process of the guides. The examination table of the ODI system is a reliable and valid tool to measure the deviation during fabrication of the ODI guides. More studies should be designed to research the relationship between the fabrication deviation and the implant insertion deviation.
