Dr. Jackirt Suthakorn Profile

Dr. Jackirt Suthakorn

at Mahidol Univ

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Proceedings Article | 17 March 2008 Paper

Point-cloud-to-point-cloud technique on tool calibration for dental implant surgical path tracking

Auranuch Lorsakul, Jackrit Suthakorn, Chanjira Sinthanayothin

Proceedings Volume 6918, 691829 (2008) https://doi.org/10.1117/12.772257

KEYWORDS: Calibration, Cameras, Image processing, Navigation systems, Imaging systems, Optical tracking, 3D image processing, Visualization, Stereoscopic cameras, Detection and tracking algorithms

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Dental implant is one of the most popular methods of tooth root replacement used in prosthetic dentistry. Computerize navigation system on a pre-surgical plan is offered to minimize potential risk of damage to critical anatomic structures of patients. Dental tool tip calibrating is basically an important procedure of intraoperative surgery to determine the relation between the hand-piece tool tip and hand-piece's markers. With the transferring coordinates from preoperative CT data to reality, this parameter is a part of components in typical registration problem. It is a part of navigation system which will be developed for further integration. A high accuracy is required, and this relation is arranged by point-cloud-to-point-cloud rigid transformations and singular value decomposition (SVD) for minimizing rigid registration errors. In earlier studies, commercial surgical navigation systems from, such as, BrainLAB and Materialize, have flexibility problem on tool tip calibration. Their systems either require a special tool tip calibration device or are unable to change the different tool. The proposed procedure is to use the pointing device or hand-piece to touch on the pivot and the transformation matrix. This matrix is calculated every time when it moves to the new position while the tool tip stays at the same point. The experiment acquired on the information of tracking device, image acquisition and image processing algorithms. The key success is that point-to-point-cloud requires only 3 post images of tool to be able to converge to the minimum errors 0.77%, and the obtained result is correct in using the tool holder to track the path simulation line displayed in graphic animation.

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