✦ LIBER ✦

Ablation of bone and polymethylmethacrylate by an XeCl (308 nm) excimer laser

✍ Scribed by Dr. Lindy Yow; J. Stuart Nelson; Michael W. Berns

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 717 KB
Volume: 9
Category: Article
ISSN: 0196-8092
DOI: 10.1002/lsm.1900090209

No coin nor oath required. For personal study only.

✦ Synopsis

One of the main problems in orthopaedics is the surgical removal of hard substances, such as bone and polymethylmethacrylate (PMMA). Such materials are often very difficult to remove without mechanical trauma to the remaining tissue. This study investigated the feasibility of the ultraviolet 308 nm excimer laser in the ablation of these materials. The beam was delivered through a 1 mm-diameter fiber optic at 40 Hz with energy densities at the target surface of 20-80 J/cm2 per pulse.

The goal of the study was to establish the ideal dosimetry for removing bone and PMMA with minimum trauma to the adjacent tissue. Histology revealed that the 308 nm laser effectively removed bone leaving a thermal damage zone of only 2-3 pm in the remaining tissue. Increasing the energy per pulse gave correspondingly larger and deeper cuts with increasing zones of thermal damage. The excimer laser was also effective in the ablation of PMMA, creating craters in the substrate with a thermal damage zone of 10-40 pm. The debris from both substrates was evaluated.

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