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3M True Definition Dental Scanner Field Evaluation

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Presentation on theme: "3M True Definition Dental Scanner Field Evaluation"— Presentation transcript:

1 3M True Definition Dental Scanner Field Evaluation
AADR Annual Meeting Charlotte, NC. Mar 19, 2014 3M True Definition Dental Scanner Field Evaluation Dr. Zhisheng Yun – Sr. Optical Specialist Paul Sevcik – Sr. Commercialization Manger

2 Disclosure Zhisheng Yun and Paul Sevcik are employees of 3M ESPE. We do have a financial interest in the producer of the products represented in the slides.

3 Review of Technologies for Dental 3D Scanner
Active Triangulation Method Structured Light 3D Technology Confocal Microscope 3D Technology Quick 3M/ESPE history - Shared this presentation with a lot of people who don’t know ESPE History – Here for 2 years, but I’m sure Seefeld knows this well. Sirona Appollo Sirona Omincam E4D Nevo Trios 3Sahpe Scanner

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5 3M Wavefront Sampling Technologies
Wavefront Sampling by Multiple Channel Imaging A(X,Y, Z) A1(x1 ,y1) A2(x2 ,y2) Image Space f B Object Space Disparity x=x1-x2 Pinhole Camera Model X Y Z A(X,Y, Z) f A(x ,y) Image Space Object Space

6 Pinhole Camera Model By pinhole camera model, object space 3D points (X,Y,Z) can be retrieved by the projected points on the image plane (x, y) using a perspective transformation equation: or (X, Y, Z) are the coordinates of a 3D point in the object space (x, y) are the coordinates of the projection points in image space A is a camera matrix, or a matrix of intrinsic parameters (cx, cy) is a principal point that is usually at the image center fx, fy are the focal lengths expressed in pixel units

7 Technologies in the 3M True Definition Scanner
3D-in-motion stereo imaging by sophisticated aspheric optics Employed the latest accelerometer & gyroscope to enable double-tap to start/stop the scan to avoid openings for switches. Computer vision technologies to create the 3D point cloud. F-150 Test

8 True Definition Scanner Field Evaluation
Tracking total cases scanned, restorative units, units completed, scan time per quadrant and scan time per full arch from Apr. 2 to Dec. 10, 2012 We are tracking the data of the scans during our filed evaluation

9 True Definition Scanner Field Evaluation
Restoration Tooth Type Tracking We can see what tooth type did more restorations…

10 True Definition Scanner Field Evaluation
Scan Time Tracking of Mandible Scan, Maxilla Scan, and Bite Scan (Total) for Full Arch Scans Software improvement domain the scan time.

11 True Definition Scanner Field Evaluation
Case Success Rate (Total: 768 cases) For 95% Confidence Interval(CI), the lower limit is 99.1% and the upper limit is 100%

12 True Definition Scanner Accuracy Evaluation
Accuracy comparison of Cerec-Bluecam, iTero-Cadent, Trios-3Shape and 3M True Definition Scanner 1 2 3 Upper control limit and lower control limit, Empirical Rule 99.7% Empirical Rule ( 99.7% fall in 3 Standard Deviations) References: 1) Joerd van der Meer, etc Application of Intra-Oral Dental Scanners in the Digital Workflow of Implantology, PLOS, Vol. 7, P2-8. Department of Orthodontics, University Medical Center Groningen, The Netherlands. 2) J Graham, etc. Evaluation of 3M True Definition Scanner, IADR 2013, Poster 682

13 Acknowledgment We would like to acknowledge the contributions of:
Dave Stegall, Shannon Scott, Jim Graham, Kelly Reff, Todd Deckard, Eric Hansen, Alberto Alvarez and many others Our co-workers in many locations of the 3M ESPE- this design could not have become a product without their commitment and dedication to excellence, reliability, quality, manufacturing, and marketing


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