Manotech Associates

Formal Design ReviewMarch 2, 2006

Jina KimForrest LiauDavid LinTeresa Wang

Questions To Be Answered

What are we trying to do?

How are we going to make it happen?

Vision & Mission

Vision: To provide a method for producing a anatomically user-matched prosthetic hand that is accessible to low-income users in poor communities

Mission: To design a prosthesis fabrication process that 1) creates a anatomically matching hand for the user and 2) uses materials that are inexpensive, processable by the user, and locally available when possible

“Accessible to low-income users"?

Accessible Solution is ultimately an option for our target user, which include ultra-low income individuals located in poor, remote areas

How would we make the solution "accessible"?

Materials are: Inexpensive locally available when possible

Process is: Performed by individuals in the community utilizing everyday tools

”Anatomically user-matched"?

Proportional to user's body Mirror image of other hand

NO skin detail

How do we make it "user-matched'?

Four-step process Initial Mold Solid hand Reversible mold Final underlayer product

How will we make this happen?

Proof-of-concept that process is feasible Initial Mold Solid hand Reversible mold Final underlayer product

Optimize materials based on basic performance specs and accessibility criteria (∏p vs. ∏a)

Optimize process to maximize accessibility with acceptable performance

Schedule

March April May6 13 20 27 3 10 17 24 1 8 15

Init. Mold Solid Hand Rev. Mold Fin. Und. Prod. PrototypeMaj. Test.B. PlanPoster/present.

Materials Selection Process Optimization

Questions?

Manotech Associates

manotech@mit.edu

http://web.mit.edu/3.042/team2_06/

Backup Slides

Materials

Mold Clay Stone powder Alginate Sugar/cellulose

Solid hand Gypsum Sugar/cellulose

Reversible mold RTV polyurethane RTV silicon Sugar/cellulose

Final Underlayer Product

rubber silicone Liquid rubber Liquid polyurethane foam

Risks

All: Cost, consistency, temperature Initial Mold: Distorted shape, long time to form, difficult take-off, sticking to skin, trace marks, brittleness, flimsiness, lack of detail

Solid hand: difficult extraction, lack of detail, difficult remediation

Reversible mold: Brittleness, flimsiness, inadequate reversibility, distorted shape, non-uniform thickness, lack of detail

Final Underlayer Product: Short lifetime, inadequate cosmetics, lack of detail, excessive weight

Clay Work

Clay Work

Clay Work

Clay Work