Fast LIPSS based texturing process of dental implants with complex geometries

Orazi, Leonardo; Pelaccia, Riccardo; Mishchenko, Oleg; Reggiani, Barbara; Pogorielov, Мaksym

doi:10.1016/j.cirp.2020.04.065

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…[1][2][3] Changes in properties such as wettability, tribological, optical, mechanical, and chemical were demonstrated on different metallic alloys, polymers, and ceramics, due to the reduction of the contact area or the increase of the active surface area of the textured part. [4,5] LIPSS structures are spontaneously generated at laser fluences slightly above the ablation/damage threshold. Their characteristics depend strongly on laser beam parameters such as wavelength, pulse duration, fluence, incidence angle, repetition rate, number of spatially effective incident pulses, and polarization direction.…”

Section: Introductionmentioning

confidence: 99%

Adaptive optics solution to improve laser-induced periodic surface structuring (LIPSS)

Siciliani,

Zaniboni,

Pelaccia

et al. 2024

Laser-Based Micro- And Nanoprocessing XVIII

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Laser-induced periodic surface structures (LIPSS) are normally created to induce peculiar surface properties but, despite their interesting properties, LIPSS generation has a main drawback which is its low throughput rate. This limits applications on large surfaces. In this work, adaptive optics is used to increase productivity, and processing tests are conducted on stainless steel and nickel-titanium alloy as examples of surfaces for biomedical and luxury applications.The use of a deformable mirror to dynamically control the wavefront and the spatial energy distribution at the focal point of a picosecond laser is introduced and discussed.The shape of the focused beam is theoretically predicted and experimentally investigated with a sub-micron, highresolution beam profiler. The shape obtained in the focus can be dynamically controlled at the level of the single vector to be scanned. Results confirm that this method can overcome the aforementioned limitations and significantly increase the throughput rate in LIPSS generation.

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Section: Introductionmentioning

confidence: 99%

Adaptive optics solution to improve laser-induced periodic surface structuring (LIPSS)

Siciliani,

Zaniboni,

Pelaccia

et al. 2024

Laser-Based Micro- And Nanoprocessing XVIII

Self Cite

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“…In recent studies on laser surface treatment of materials, it has been shown that the geometric shape of the surface, the size of pattern elements, and surface oxides affect adhesion [ 36 , 37 , 38 ], orientation angle [ 29 , 39 , 40 ], and differentiation and proliferation [ 37 , 41 , 42 , 43 , 44 ] of various types of cells. For example, it was shown during experiments on human osteosarcoma (HOS) cells [ 40 ] that a polished surface and a rough surface with non-periodic relief contribute to random orientation of cells, and it was found that cell spreading decreases with the increase of surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced µ-Rooms for Osteocytes on Implant Surface: An In Vivo Study

et al. 2022

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Laser processing of dental implant surfaces is becoming a more widespread replacement for classical techniques due to its undeniable advantages, including control of oxide formation and structure and surface relief at the microscale. Thus, using a laser, we created several biomimetic topographies of various shapes on the surface of titanium screw-shaped implants to research their success and survival rates. A distinctive feature of the topographies is the presence of “µ-rooms”, which are special spaces created by the depressions and elevations and are analogous to the µ-sized room in which the osteocyte will potentially live. We conducted the comparable in vivo study using dental implants with continuous (G-topography with µ-canals), discrete (S-topography with μ-cavities), and irregular (I-topography) laser-induced topographies. A histological analysis performed with the statistical method (with p-value less than 0.05) was conducted, which showed that G-topography had the highest BIC parameter and contained the highest number of mature osteocytes, indicating the best secondary stability and osseointegration.

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“…Regarding the LIPSS formation, many publications have dealt with processing parameters aiming to optimize their shape to utilize these features on various materials for surface patterning applications, [23][24][25][26][27][28][29][30][31] even including polarization-dependent appearance. [32][33][34][35] For this purpose, incident laser pulses perpendicular to the sample surface are commonly used.…”

Section: Introductionmentioning

confidence: 99%

A Perspective to Control Laser-Induced Periodic Surface Structure Formation at Glancing-Incident Femtosecond Laser-Processed Surfaces

Jelinek

Pfeifenberger

Pippan

et al. 2021

JOM

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The favorable combination of high material removal rate and low influence on the material beneath the ultra-short pulsed laser-processed surface are of particular advantage for sample preparation. This is especially true at the micrometer scale or for the pre-preparation for a subsequent focused ion beam milling process. Specific surface features, the laser-induced periodic surface structures, are generated on femtosecond laser-irradiated surfaces in most cases, which pose an issue for surface-sensitive mechanical testing or microstructural investigations. This work strives for an approach to enhance the surface quality of glancing-incident laser-processed surfaces on the model material copper with two distinctly different grain sizes. A new generalized perspective is presented, in which optimized parameter selection serves to counteract the formation of the laser-induced periodic surface structures, enabling, for example, grain orientation mapping directly on femtosecond laser processed surfaces.

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Fast LIPSS based texturing process of dental implants with complex geometries

Cited by 14 publications

References 17 publications

Adaptive optics solution to improve laser-induced periodic surface structuring (LIPSS)

Adaptive optics solution to improve laser-induced periodic surface structuring (LIPSS)

Laser-Induced µ-Rooms for Osteocytes on Implant Surface: An In Vivo Study

A Perspective to Control Laser-Induced Periodic Surface Structure Formation at Glancing-Incident Femtosecond Laser-Processed Surfaces

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