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Proceedings Paper

Comparison of the ablation of polymethylmethacrylate by two fiber-optic-compatible infrared lasers
Author(s): Jonathan P. Garino; David Nazarian; Mark I. Froimson; Ronald P. Grelsamer; Michael R. Treat
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Paper Abstract

Polymethylmethacrylate (PMMA) is a compound frequently employed in orthopedic surgery for the fixation of prosthetics and other materials to bone. It is employed for this purpose due to its excellent strength and durability. However, these same properties also make the removal of PMMA very difficult. With this problem in mind, the ablation of PMMA by the Nd:YAG and the THC:YAG lasers was compared. The tip of the optical fiber was placed at a distance to achieve optimal spot size on to pre-weighed blocks of PMMA (Simplex - Howmedica, Rutherford, N.J.). Ablation was carried out with both the THC:YAG and Nd:YAG lasers over a range of powers (5 - 20 watts) and time periods. The amount of PMMA ablated was then determined and compared. Throughout the energy range examined, the THC:YAG laser was more effective than its Neodynium counterpart at the power levels tested. Present clinical application of these lasers in PMMA ablation is limited by technical obstacles.

Paper Details

Date Published: 1 May 1991
PDF: 5 pages
Proc. SPIE 1424, Lasers in Orthopedic, Dental, and Veterinary Medicine, (1 May 1991); doi: 10.1117/12.43987
Show Author Affiliations
Jonathan P. Garino, Columbia Presbyterian Medical Ctr. (United States)
David Nazarian, Columbia Presbyterian Medical Ctr. (United States)
Mark I. Froimson, Columbia Presbyterian Medical Ctr. (United States)
Ronald P. Grelsamer, Columbia Presbyterian Medical Ctr. (United States)
Michael R. Treat, Columbia Presbyterian Medical Ctr. (United States)


Published in SPIE Proceedings Vol. 1424:
Lasers in Orthopedic, Dental, and Veterinary Medicine
Stephen J. O'Brien; Douglas N. Dederich; Harvey Wigdor; Ava Micky Trent, Editor(s)

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