| Title | Customizing the Amadeus(R) II microkeratome: evaluation of cut quality with various settings using electron microscopy. | | Author(s) | Lackerbauer CA, Grueterich M, Kojetinsky C, Ulbig M, Kollias A | | Institution | Department of Ophthalmology, Ludwig-Maximilians-University, Munich - Germany. | | Source | Eur J Ophthalmol 2009 September-October; 19(5):743-747. | | Abstract | Purpose. To evaluate the cut quality of keratectomy specimens created with the new Amadeus® II microkeratome (SIS, Ziemer Ophthalmic, Port, Switzerland) using scanning electron microscopy (SEM). Methods. Corneal cuts were performed in 24 freshly enucleated porcine eyes using the Amadeus® II microkeratome with combinations of cutting-head depth, oscillation rate, head-advance speed, and reuse of the blade. For the cutting trials, a 140-µm and 160-µm cutting head with three oscillation rates of 8,000, 10,000, and 13,000 rpm and two head-advance speed rates of 1.5 and 3.5 mm/s were chosen. In each setting, the blade was reused for a second time. All eyes were included, resulting in 4 groups with 6 eyes for each configuration. The surface and edge of the corneal cut was examined using SEM.
Results. At fixed oscillation rates, an increase in head-advance speed led to lower quality cuts, higher surface roughness, and irregular cut edges for both cutting heads (140 µm/160 µm), especially when using the blade for a second time. At fixed head-advance speeds an increase in oscillation rates improved the cut quality for both cutting heads (140 µm/160 µm). This results in smoother surface characteristics and more regular cut edges, especially when using the blade for the first time.
Conclusions. Using the Amadeus® II microkeratome for laser in situ keratomileusis procedures, the optimum oscillation rate, the optimum head-advance speed, and a single use of the blade will produce a very smooth and regular surface and cut edge for safe, comfortable, and improved customized refractive surgery. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 19787592 |
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