Abstract
Background and Objective: Otosclerosis is an inner ear bone disease characterized by fixation of the stapes and consequently progressive hearing loss. One treatment option is the surgical replacement of the stapes by a prosthesis. When so called smart materials like nitinol are used, prosthesis fixation can be performed using a laser without manual crimping on the incus. However, specific laser-prosthesis interactions have not been described yet. The aim of the present study was to elucidate the thermo-mechanical properties of the NiTiBOND (R) prosthesis as a basis for handling instructions for laser-assisted prosthesis fixation. Study Design and Materials and Methods: Closure of the NiTiBOND (R) prosthesis was induced ex vivo by either a diode laser emitting at =940nm or a CO2 laser (=10,600nm). Total energy for closure was determined. Suitable laser parameters (pulse duration, power per pulse, distance between tip of the laser fiber and prosthesis) were assessed. Specific laser-prosthesis interactions were recorded. Results: Especially the diode laser was found to be an appropriate energy source. A total energy deposit of 60mJ by pulses in near contact application was found to be sufficient for prosthesis closure ex vivo. Energy should be transmitted through a laser fiber equipollent to the prosthesis band diameter. Specific deformation characteristics due to the zonal prosthesis composition have to be taken into account. Conclusion: NiTiBOND (R) stapes prosthesis can be closed by very little energy when appropriate energy sources like diode lasers are used, suggesting a relatively safe application in vivo. Lasers Surg. Med. 50:153-157, 2018.
| Item Type: | Journal article |
|---|---|
| Faculties: | Medicine |
| Subjects: | 600 Technology > 610 Medicine and health |
| ISSN: | 0196-8092 |
| Language: | English |
| Item ID: | 64026 |
| Date Deposited: | 19. Jul 2019, 12:14 |
| Last Modified: | 04. Nov 2020, 13:43 |
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