Investigation of initial implant stability with different dental implant designs is an important task to obtain good quality
dental implants. Failure of a dental implant is often related to failure to osseointegrate correctly. Optical Coherent
Tomography is a competitive non-invasive method of osseointegration investigation. FD-OCT with Swept Source was
used to obtain 3-D image of the peri-implant tissue (soft and hard) in the case of mandible fixed screw. 1350 nm centered
laser source give better images than 850 nm laser source for hard tissue imaging. Present work suggests that Optical
Coherent Tomography is a proper technique to obtain the image of the contact tissue-metal screw. OCT images are
useful to evaluate optical properties of bone tissues.
Ophthalmic OCT was performed using a novel, compact external cavity semiconductor laser at ~850
nm. Retinal imaging was demonstrated with a resolution of <7 microns in tissue at a speed of
16,000 axial scans per second. The coherence length of the laser is >10 mm, enabling an axial
measurement range of ~2.5 mm. Real-time display and data streaming capabilities enable video-rate
imaging of the retina at >30 frames per second. High-definition and three-dimensional imaging
were demonstrated on normal retinas. The resolution of <7 microns in the retina is, to our
knowledge, the highest resolution achieved in the retina with swept source OCT to date. The long
coherence length of the laser enables high-sensitivity measurements over a large axial measurement
range. The speed of 16,000 axial scans per second is comparable to current spectrometer-based
spectral/Fourier domain OCT systems. The low cost and small footprint of our laser (~10 cm x 20
cm) may enable the development of OCT for novel applications. Further improvements in speed
will be possible by using alternative scanning methods.
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