1. Preliminary Detailed Design Review Periodontal Measurement Test System February 1, 2013

2. Periodontal Measurement Test System Current method Goals of new method

3. Customer Needs

4. Specifications

5. Pugh Matrix

6. PHANTOM TOOTH Canadianawareness.org

7. Specifications SpecDescriptionCN 3.1 The phantom tooth shall be made of non-biological materials that mimic human tissue with respect to ultrasonic wave propagation properties. 8, 9, 10 3.2 The phantom tooth shall be able to be quickly replaced within the phantom holding fixture. 3, 11 3.3 The phantom tooth geometry shall allow for quick alterations of the physical relationship between the tooth and the gums. 1, 4

8. Phantom Design

10. Relevant US Properties Density Speed of sound Acoustic impedance

11. Material Selection

12. Contacts Dr. Phillips – RIT bio medical engineering Dr. Maria Helguera – RIT imaging science – Biomed ultrasound Eastman Dental Clinic – Dr. Caton Bradley Rogge – RIT’s Pre-dental association Professor Lamkin-Kennard – RIT Mechanical Engineering Hamad Ghazle, Jodie Crowley – RIT Ultrasound

13. FIXTURE DESIGN

14. Specifications SpecificationDescription Customer Needs 1.0 Test Probe Fixture 1.1The test probe fixture must be able to move through 3 axis.5 1.2The test probe fixture shall be compact and portable.3, 4, 11, 12 1.3 The test probe fixture shall be simply constructed to allow for maintenance to be performed by untrained personnel relying only on a maintenance manual (to be provided).3, 4, 11, 12 1.4 The test probe fixture shall allow for position changes on or about any axis to a programmatically specified point to within 0.1 mm for linear movement or 1° for angular movement.2, 5, 6 1.5 The test probe fixture shall hae minimal impact on the environment and noise levels within the surrounding area while active. 5, 7, 8, 9, 10, 11 2.0 Phantom Holding Fixture 2.1The phantom holding fixture must be able to move through 2 axis.5 2.2 The phantom holding fixture shall be simply constructed to allow for maintenance to be performed by untrained personnel relying only on a maintenance manual (to be provided).3, 4, 11, 12 2.3 The phantom holding fixture shall allow for position changes on or about any axis to a programmatically specified point to within 0.1 mm for linear movement or 1° for angular movement.2, 5, 6 2.4 The phantom holding fixture shall allow for the phantom tooth to be replaced by a human mandible.11 2.5 The phantom holding fixture shall be simply constructed to allow for maintenance to be performed by untrained personnel relying only on a maintenance manual (to be provided).3, 4, 11, 12

15. Positioning System Model

16. Power Screw

17. Turn Table

18. Assembly Drawing

19. Pitch Movement

20. Power Screw Assembly

21. Power Screw Specs Nut Specs Material303 StainlessSelf Lubricating Polyacetal Total Length (in)241.9 Pitch (in)0.25 Diameter (in)0.375 SupplierHaydon Kirk Price62.8329.87 Efficiency (%)70 Thread DirectionRight Dynamic Load-10 Drag Torque (oz-in)-1 to 5

22. Nut Detailed Drawing

23. Turn Table Drawing

24. Pitch Axis Drawing

25. Mounting Table Drawing

26. Guide Rail Clamp

27. Pitch Selection Calculations Maximum Screw Pitch to Meet Accuracy Req's Expected Stepper Motor Speeds w/o Micro-Stepping (rev/sec)16 w/ Micro-Stepping (rev/sec)2Pmax (mm)36 Motor Angular Accuracy (deg)1Pmin (in)1.417323 Desired Linear Accuracy (+/- mm)0.1Maximum Screw Pitch to Meet Travel Time Req's Estimated Screw Length (in)10 Estimated Screw Length (mm)254 Estimated Time of Travel (s, full L)12Pmax (mm)10.58333 Chosen Screw Pitch (in)0.25Pmax (in)0.416667

28. Torque Requirement Calculations PropertySymbolUnitsValueRequired Torque to Overcome Friction Screw PitchPrev/in4 Load on ScrewWoz16 Screw Efficiencye0.7Tfric (oz-in)0.036378 Static Friction Coeff-nut on screwμs0.04 Accel of GravityGin/sec2384 Jload0.02533 Time to reach constant Veltsec0.1 Density of Screwρoz/in34.624 Jscrew0.089772 Length of ScrewLin10 Radius of ScrewRin0.1875 Load on ScrewWoz16 Ang velocity of motorωrad/sec12.5663706Taccel (oz-in)0.395513 Screw PitchPrev/in4 Motor InertiaJmotoroz-in^21.0934959 Total Torque (oz-in)0.431891 Note: All values for 1lb load on horizontal screw

29. Bearing Selection Very low radial loads – Guide rail support Small axial loads – Low friction nut – Guide rail support Basic radial bearing should handle loads

30. Bearing Specs StyleDouble Sealed ID (in)0.375 OD (in)0.6875 Width (in)0.3125 Dyn. Load Cap (lbs)255 Price (ea)8.38 Quantity6

31. Couplings Coupling Specs MaterialSteel ID (in)0.25 OD (in)0.5 Length (in)0.75 Set Screw Size10-32 Max RPM3450 Max Torque59 Price6.93

32. Collars Collar Specs MaterialSteel ID (in)0.25 OD (in)0.5 Length (in)0.28125 Set Screw Size10-32 Price0.63

33. ELECTRICAL

34. Specifications 4.0 – Proof of concept put together, proved we could attain appropriate control required for final system 5.0 – Unable to test, waiting on probe, able to communicate with an oscilloscope, but no data has been attained from probe to date due to lack of probe 6.0 – Have data logging already written in code, working on limit comparison programming

35. BLOCK DIAGRAM

36. WIRING DIAGRAM

37. PROGRAMMING FLOWCHART

38. ELECTRICAL BOM AND COST Preferred List ItemPart NumberManufacturerLead TimeCostQtyExtended Cost Arduino UNOUNO R3Arduino3-5 days $ 24.951 ServoHS-225MGHitec3-5 days $ 35.992 $ 71.98 StepperRB-SOY-14SOYO3-5 days $ 44.283 $ 132.84 EasyDriverB004G4XR60Sparkfun3-5 days $ 14.956 $ 89.70 Misc Budget $ 100.001 $ 419.47

39. Justification Control SystemMotors Servos were chosen for combination of price, mobility, and durability. Metal servo with high torque rating to allow ease of use with system design Stepper motors were picked based off of Voltage, Current, torque, and Driver limitations

40. Risk Assessment

41. High Risk Items Non-bio materials – Availability – Similarity to human tooth Formation of phantom – Processes available hinge on materials chosen Probe!

42. Questions/Comments/Suggestions