Tooth ablation using a CPA-free thin disk femtosecond laser system

Niemz, Markolf H.; Kasenbacher, A.; Straßl, M.; Bäcker, Alexandra; Beyertt, A.; Nickel, D.; Giesen, Adolf

doi:10.1007/s00340-004-1579-2

Cited by 49 publications

(27 citation statements)

References 15 publications

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“…In this expression ω(z) is the beam Gaussian waist variation along the propagation direction and is given by a well known expression [29] .…”

Section: Resultsmentioning

confidence: 99%

“…The use of lasers in the medical field, as an instru ment for contact free tissue removal of dental hard tis sues [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], osseous tissues [33][34][35] have been stud ied as a means for complementing conventional drill ing or cutting tools. In all applications, a balance between several phenomena must be taken into con sideration.…”

Section: Introductionmentioning

confidence: 99%

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Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity

et al. 2011

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“…In this expression ω(z) is the beam Gaussian waist variation along the propagation direction and is given by a well known expression [29] .…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity

et al. 2011

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“…As a consequence, the secondary thermal and mechanical effects should be reduced dramatically with fs-photodisruption. Targeted high precision photodisruption, which has been demonstrated in this paper, predicts minimally invasive surgery inside cells [12], tissues [13,14] or even a whole organ of the human body such as the eye [15,16] and tooth [17,18].…”

Section: Mechanism Of Fs Laser Ablation Of Biological Tissuesmentioning

confidence: 99%

An in vitro study of femtosecond laser photodisruption in rabbit sclera

Jiang

Yang

Dai

et al. 2008

Front. Optoelectron. China

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To explore the possibility of photodisruption in rabbit sclera by femtosecond (fs) laser and seek appropriate incision techniques and relevant parameters, a fs laser (800 nm/50 fs) with different pulse energies was applied to irradiate rabbit sclera in vitro. By moving a computer-controlled three-axis translation stage to which the sample was attached, the laser achieved three types of incisions: transscleral channel, snake pattern and linear cut. The irradiated samples were observed by light microscopy and scanning electron microscopy (SEM). In comparison with fs laser, Nd:YAG was used as control. The experimental results show that through an objective lens with numerical aperture (NA) of 0.2, the fs laser with power intensity larger than 955 TW/cm 2 and pulse energy ranging from 37.5-125 mJ, cutting depths from 30-70 mm may be achieved after linearly scanning in sclera at a translation speed of 0.1 mm/s. However, it failed to make any photodisruption when the power intensity was below 796 TW/cm 2 or the pulse energy was less than 31.25 mJ under the same condition. Compared with the Nd:YAG laser, the inner wall of the channel was smoother and the damage to the surrounding tissues was slight with the fs laser. The high precision of intrascleral photodisruption and minimal damage to surrounding tissues by a fs laser display its potential application in the treatment of glaucoma.

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“…These ablation characteristics allow for extremely precise tissue removal with minimal damage to the surrounding tissue. Substantial research efforts over the last two decades have explored tissue ablation in the corneal stroma [3][4][5], cortical parenchyma [6], and epidermis [7], and harder tissue like nail [8] and dentin [9][10][11]. These studies led to the first clinical use of ultrafast lasers in laser assisted in situ keratomileusis (LASIK) for flap creation [3] and more recently for cataract surgery [12].…”

Section: Introductionmentioning

confidence: 99%

Kagome fiber based ultrafast laser microsurgery probe delivering micro-Joule pulse energies

Subramanian

Gabay

Ferhanoğlu

et al. 2016

Biomed. Opt. Express

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Abstract:We present the development of a 5 mm, piezo-actuated, ultrafast laser scalpel for fast tissue microsurgery. Delivery of micro-Joules level energies to the tissue was made possible by a large, 31 μm, air-cored inhibited-coupling Kagome fiber. We overcome the fiber's low NA by using lenses made of high refractive index ZnS, which produced an optimal focusing condition with 0.23 NA objective. The optical design achieved a focused laser spot size of 4.5 μm diameter covering a 75 × 75 μm 2 scan area in a miniaturized setting. The probe could deliver the maximum available laser power, achieving an average fluence of 7.8 J/cm 2 on the tissue surface at 62% transmission efficiency. Such fluences could produce uninterrupted, 40 μm deep cuts at translational speeds of up to 5 mm/s along the tissue. We predicted that the best combination of speed and coverage exists at 8 mm/s for our conditions. The onset of nonlinear absorption in ZnS, however, limited the probe's energy delivery capabilities to 1.4 μJ for linear operation at 1.5 picosecond pulse-widths of our fiber laser. Alternatives like broadband CaF 2 crystals should mitigate such nonlinear limiting behavior. Improved opto-mechanical design and appropriate material selection should allow substantially higher fluence delivery and propel such Kagome fiber-based scalpels towards clinical translation.

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Tooth ablation using a CPA-free thin disk femtosecond laser system

Cited by 49 publications

References 15 publications

Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity

Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity

An in vitro study of femtosecond laser photodisruption in rabbit sclera

Kagome fiber based ultrafast laser microsurgery probe delivering micro-Joule pulse energies

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