Effect of Surface Roughness and Low-Level Laser Therapy on Removal Torque of Implants Placed in Rat Femurs
The present study measured removal torque and bone-implant interface resistance of machined implants, acid-etched implants, or machined implants irradiated around the implant area with infrared low-level laser therapy (LLLT; 830 nm) immediately after surgery. There were statistically significant differences between Groups A (control) and B (rough surface) (P = .03). Implants with a rough surface seem to add resistance to the bone-implant interface compared with smooth titanium implants or implants treated with LLLT.
Micrographs showing implants with (a) smooth surface and (b) rough surface at 500 μm and ×130 magnification, and implants with (c) smooth surface and (d) rough surface at 50 μm and ×1000 magnification.
Comparison of mean removal torque values between study groups.
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