Validation of a roughness parameters for defining surface roughness of prosthetic polyethylene Pe-Lite liner

Abstract

The Biosculptor's CNC milling machine, the Biomill, offered four different surfaces machined on positive models. This study aims to adopt the surface topography method in characterizing the four different surface roughness of polyethylene Pe-Lite liner as a product of the Biomill. Three surface parameters chosen were the arithmetic average (Ra), root mean square roughness (Rq), and ten-point height (Rz). The surface parameters were used to define the four different surfaces (STANDARD, FINE, COARSE, and FAST) and then compared with the same liner material from a conventionally fabricated socket. The Ra values of the conventional liner, 8.43 μm, were determined to be in-between the Ra values of STANDARD and FAST surfaces which were 8.33 μm and 8.58 μm respectively. STANDARD surface required 43.2 min to be carved while FAST surface took almost only a third of the time compared to STANDARD surface (conventional socket takes 2–3 days). The results of this study would be one of the guidelines to the prosthetists using the Biosculptor in socket fabrication to produce sockets according to the suitable surface to cater to different requirements and levels of activity of each amputee.

Development of Ti‐10Nb alloy by powder metallurgy processing route for dental application

“…However, the roughness parameter Rq (Root Mean Square roughness) showed a statistically significant difference between the sample groups ( p < .05) and is more effective in describing the surface roughness, as it depicts the standard deviation of the surface height distribution by statistical methods. Further, it is also far more sensitive than Ra because it provides the roughness measurement at the microscopic level 34 . It is observed that instead of similar grinding and polishing for all the samples, the samples compacted at lower compaction pressure show a higher Rq value.…”

“…Further, it is also far more sensitive than Ra because it provides the roughness measurement at the microscopic level. 34 It is observed that instead of similar grinding and polishing for all the samples, the samples compacted at lower compaction pressure show a higher Rq value. In contrast, the sample compressed at higher compaction pressure shows a relatively lower Rq value.…”

Surface Roughness, Dynamic Wettability, and Interphase of Modified Melamine Formaldehyde-Based Adhesives on Jabon Wood

“…The result in Table 2 shows the surface roughness value of Jabon wood after sanding with a 100-grit belt sander (P-100) on different surface types, determined using a portable stylus-type profilometer. The surface roughness of solid materials is generally measured using three parameters: average surface roughness (Ra), root mean square roughness (Rq), and ten-point mean roughness (Rz) [ 39 ]. However, Ra is the most used metric for determining wood surface roughness.…”

“…Consequently, the Ra parameter was employed in this investigation to quantify the surface irregularity of Jabon wood. An approach methodology utilizing Ra values has been implemented in prior studies [ 3 , 4 , 5 , 14 , 15 , 39 , 40 ]. The average roughness (Ra) of a profile is calculated by averaging the individual depths and heights (irregularities) of its arithmetic mean elevation.…”

Influence of incorporation of nanostructured silver vanadate decorated with silver nanoparticles on roughness, microhardness, and color change of pit and fissure sealants

“…Rz, or maximum profile height, measures the vertical distance between the highest peak and the lowest valley over a sampling length. Sa, or arithmetic mean of the absolute values of the surface deviations, is another parameter that represents the average surface roughness and was used in this study [ 46 , 47 ]. Scans will be performed at 10 × magnification and 1024 × 1024 pixels resolution.…”