Cementing Bones Advanced Chemistry Mr Spangler Whitefish High
Cementing Bones Advanced Chemistry Mr. Spangler Whitefish High School
Background Info The De. Puy Medium Viscosity Bone Cement is used as a cement to adhere bone to metal during an orthopedic surgery. The cement sets in 10 minutes so you have limited time to work with it and it also costs approximately $100 a batch (6 batches). This test is to simulate how much raw force the cement can withstand in the human body so people who have underwent this surgery can better understand their physical limitations.
First We Tested an Epoxy
Materials: Expendable Cup, De. Puy Medium Viscosity Bone Cement expendable stirring rod, fume hood, two pairs of surgical gloves, and timer 1) 2) 3) 4) 5) 6) 7) Put two surgical gloves on each hand Put all the powdered contents of the cement in the expendable cup Empty all the liquid material into the powder under the fume hood Mix for 30 seconds under the fume hood Let it settle under the fume hood for 3 minutes or until it does not adhere to gloves (putty-like consistency) Apply in between the desired adhering area with hands Let it settle in the air duct for approximately 10 minutes Warning: Cement sets very quickly and the fumes are toxic
Procedure for Testing Force Materials: Bone adhered to metal, two straps, varying weights, rope, strength, flat overhead bar. 1) Tie both ends of the bone to the overhead bar using the straps 2) Using the rope, hang weights in increasing increments from the exposed ends of the metal 3) Repeat step two until the metal and the bone separate entirely 4) Record max weight held Caution: Be careful when the cement fails
T-Grip Test
Pull Test
Double Cantilever Beam Test
Testing
Data • T-Grip test – Held 90 pounds • Double cantilever beam test -Held 130 pounds • Pull-Test -Held 125 pounds • The Bonecement bond is weaker than the metalcement bond
Conclusion • The Bone-cement is pretty strong as we showed in a variety of tests • People that have this substance in their body shouldn’t be too worried about physical limitations
Improvements • Testing more likely forces in a body • Use bones that are fresher and that are constantly at body temperature • Use titanium instead of steel • More sterile environment
References • "A Double Cantilever Beam Test for Characterizing Mode I Delamination of Composite Materials. " A Double Cantilever Beam Test for Characterizing Mode I Delamination of Composite Materials. N. p. , n. d. Web. 09 May 2013. • "Depuy CMW. " De. Puy. com | Patient & Caregiver Resources For Back, Hip, Limb & Joint Pain From De. Puy. N. p. , n. d. Web. • "De. Puy. com | Patient & Caregiver Resources For Back, Hip, Limb & Joint Pain From De. Puy. " De. Puy. com | Patient & Caregiver Resources For Back, Hip, Limb & Joint Pain From De. Puy. N. p. , n. d. Web. 09 May 2013.
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