Wet bone ablation with mechanically Q-switched high-repetition-rate CO[sub 2] laser

Ivanenko, M.M.; Hering, P.
September 1998
Applied Physics B: Lasers & Optics;1998, Vol. 67 Issue 3, p395
Academic Journal
Abstract. Carbonization-free ablation of bone tissue with 400-ns pulses from a Q-switched CO[sub 2] laser using a miniature water spray is demonstrated. An ablation threshold of 1.4J/cm[sup 2], an optimal energy density of 9-10J/cm[sup 2], and a corresponding specific ablation energy of 25-30 J/mm[sup 3] are found for pig thighbone compacta at lambda = 9.57 micro m and a beam waist diameter of 0.5 mm. The water spray alleviates tissue carbonization even at high laser pulse repetition rates and increases ablation efficiency.


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