An optical three-dimensional technique for topographical descriptions of surgical implants

Wennerberg, Ann; Albrektsson, Tomas; Ulrich, H.; Krol, J. J.

doi:10.1016/0141-5425(92)90087-2

Cited by 59 publications

(30 citation statements)

References 8 publications

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“…This method is well established and has been frequently used to char- acterize titanium surfaces with different roughness values. 21 The analysis demonstrated that the TPS surface was the roughest surface among the three tested surfaces, followed by the SLA surface, whereas the machined surface was clearly the smoothest surface. It is important to note, however, that stylus profilometry cannot resolve the finer features of both, the TPS (undercuts) and the SLA surface (micropits).…”

Section: Discussionmentioning

confidence: 98%

Interface shear strength of titanium implants with a sandblasted and acid-etched surface: A biomechanical study in the maxilla of miniature pigs

Buser

Nydegger

Oxland

et al. 1999

J. Biomed. Mater. Res.

412

273

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The purpose of the present study was to evaluate the interface shear strength of unloaded titanium implants with a sandblasted and acid-etched (SLA) surface in the maxilla of miniature pigs. The two best documented surfaces in implant dentistry, the machined and the titanium plasma-sprayed (TPS) surfaces served as controls. After 4, 8, and 12 weeks of healing, removal torque testing was performed to evaluate the interface shear strength of each implant type. The results revealed statistically significant differences between the machined and the two rough titanium surfaces (p <.00001). The machined surface demonstrated mean removal torque values (RTV) between 0.13 and 0.26 Nm, whereas the RTV of the two rough surfaces ranged between 1.14 and 1.56 Nm. At 4 weeks of healing, the SLA implants yielded a higher mean RTV than the TPS implants (1.39 vs. 1. 14 Nm) without reaching statistical significance. At 8 and 12 weeks of healing, the two rough surfaces showed similar mean RTVs. The implant position also had a significant influence on removal torques for each implant type primarily owing to differences in density in the periimplant bone structure. It can be concluded that the interface shear strength of titanium implants is significantly influenced by their surface characteristics, since the machined titanium surface demonstrated significantly lower RTV in the maxilla of miniature pigs compared with the TPS and SLA surfaces.

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Section: Discussionmentioning

confidence: 98%

Interface shear strength of titanium implants with a sandblasted and acid-etched surface: A biomechanical study in the maxilla of miniature pigs

Buser

Nydegger

Oxland

et al. 1999

J. Biomed. Mater. Res.

412

273

View full text Add to dashboard Cite

show abstract

“…The surface roughness was characterized in a three-dimensional way, numerically as well as visually, for two randomly chosen implants from each group with help of the TopScan 3D system ® (Heidelberg Instruments, Heidelberg, Germany). TopScan 3D is a non-contacting optical profilometer which uses the principle of confocal laser scanning microscopy for depth descrimination (described by Wennerberg et al [2] in more detail). For each screw the measured areas were on the bottom, mid and top of the implant and for each site one thread-top, one thread-valley and one thread-flank were measured.…”

Section: Implants and Surface Roughness Testmentioning

confidence: 99%

Quantitative comparison of screw-shaped commercially pure titanium and zirconium implants in rabbit tibia

Johansson

Wennerberg

Albrektsson

1994

J Mater Sci: Mater Med

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Screw-shaped implants with an outer diameter of 3.7 mm and a total length of 8 mm were made from rods of commercially pure titanium (c.p. Ti) and commercially pure zirconium (c.p. Zr). Prior to insertion in rabbit tibia for 12 weeks, the surface roughness of two randomly chosen c.p. Ti and two c.p. Zr machined implants of the batch were numerically and visually described with a TopScan 3-D system. Irrespective of implant material, they demonstrated rather similar surface roughnesses, for example, the R a and Rq values (that describe the average deviation from the mean line) were 0.79 and 1.18 for c.p. Ti versus 0.56 and 0.86 for c.p. Zr. Each rabbit had four implants inserted; two made of c.p. Ti in one leg and two made of c.p. Zr in the other. The bone tissue reactions to the materials were qualitatively and quantitatively examined. Removal torque tests were performed on the distal implants and histomorphometrical evaluations of the proximal ones. No qualitative or quantitative bone differences were observed. Removal torque measurements demonstrated a mean of 26.2 N cm -t-9.6 for c.p. Ti versus a mean of 25.9 N cm ___ 7.1 for the c.p. Zr implants. Histomorphometrical comparisons of the bone-to-metal contact revealed a mean of 29 -t-10.2 % for c.p. Ti and a mean of 19 _ 5.5 % for the c.p. Zr samples. The mean bone area in the threads around the c.p. Ti samples was 49 _+ 16.6% compared to 43 _+ 7.9% for the c.p. Zr group. Commercially pure titanium and zirconium implants seemed to be well accepted by the bone bed after 12 weeks of insertion in rabbit bone.

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“…The topographical characterization is performed by using an optical profilometer (TopScan 3D, Heidelberg Instruments, Germany) based on confocal laser scanning microscopy [12] . An important part of the interpretation of the data, is the filtering method of the raw data.…”

Section: Laser Ablation Set-upmentioning

confidence: 99%

Laser Ablation Micropatterning of Screw‐Shaped Dental Implants

Reimers

Hallgren

Jartoft

et al. 2000

Materials for Medical Engineering

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Much effort has been put into achieving surface properties that will enhance the fixation in bone of dental implants. Previous studies have shown that topography on a micron level has influence over the incorporation of dental implants in bone. The screw-shaped implant design and choice of material (Ti) have had good success rate but could be improved. Increased surface roughness has been studied before on these implants where a randomly distributed roughness was produced by sand blasting. By producing a surface micropattern using precision laser micromachining, a controlled surface roughness is introduced. The controlled surface roughness also enables a better ability to isolate the topographic parameters responsible for, or active in, stimulating bone-growth at the surface.We used nanosecond pulsed laser ablation to pattern the implant surface, using a passive diffractive optic element (kinoform) as a beam-splitter. The pattern, a 2-D square lattice of 10 µm diameter hemispheres with a spacing of 30 µm, was produced on the flanks of the screw-shaped implants. Samples have been chemically and topographically characterized and are currently under biological evaluation.

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An optical three-dimensional technique for topographical descriptions of surgical implants

Cited by 59 publications

References 8 publications

Interface shear strength of titanium implants with a sandblasted and acid-etched surface: A biomechanical study in the maxilla of miniature pigs

Interface shear strength of titanium implants with a sandblasted and acid-etched surface: A biomechanical study in the maxilla of miniature pigs

Quantitative comparison of screw-shaped commercially pure titanium and zirconium implants in rabbit tibia

Laser Ablation Micropatterning of Screw‐Shaped Dental Implants

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