Special Issue "Modern Methods for Measuring the Functional Characteristics of Surfaces"
Deadline for manuscript submissions: closed (30 October 2017)
Prof. Dr. Michal Wieczorowski
Faculty of Mechanical Engineering and Management, Poznan University of Technology, 3 Piotrowo St., 60-965 Poznan, Poland
Interests: surface metrology; surface topography; measurement systems
Surface topography has a profound influence on the function of a surface. In industrial practice, geometric product specification is an important issue. The measurement and characterization of the geometric features of machined parts is important when trying to determine the functional properties of surfaces, and also in the control of process parameters during manufacturing. However, there are many other areas of science, engineering and even the arts where surface topography is critical to function.
The aim of this Special Issue is to provide an international forum for the dissemination of scientific information on surface metrology—submission from all fields involving the measurement and characterization of surface topography, including archaeology, art conservation, anthropology, biology, biomedical engineering, chemistry, civil engineering, food science, forensics, geodetics, geology, material science, mechanical engineering, manufacturing, metrology, nanotechnology, tribology, and others. The Special Issue covers the modelling, design, and characterization of surfaces and the relationship between surface properties and their applications. This Special Issue accepts high-quality articles containing original research results and review papers regarding metrology, development, and application of the science and technology of measurement, instrumentation and characterisation.
Prof. Dr. Grzegorz Krolczyk
Prof. Dr. Richard Leach
Prof. Dr. Michal Wieczorowski
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Technologies is an international peer-reviewed open access quarterly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) is waived for well-prepared manuscripts submitted to this issue. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Comparative analysis of surface topography of custom CAD/CAM zirconia abutments by means of optical profilometry
Author: Peter Gehrke
Abstract: Objective: CAD/CAM generated ceramic implant abutments have recently attracted interest due to their superior customization possibilities and aesthetic advantages. Despite their widespread clinical use, little information is currently available on their surface topography, however. The transmucosal portion of the abutment shoulder is of particular interest, as it ideally supports soft tissue but minimizes mechanical plaque retention. The aim of this in vitro study was to topographically characterize the trans- and subgingival roughness of CAD/CAM zirconia abutments from different manufacturers and compare them with zirconia stock abutments. Material and Method: The surface topography of eight CAD/CAM zirconia implant abutments (tests) and two prefabricated zirconia stock abutments (controls) was determined using focus variation microscopy. Two points on the abutment shoulder were subjected to profilometric examination. 2D and 3D parameters of roughness were obtained and compared. Results: The surface roughness of all the test abutments exceeded the recommended threshold of Ra = 0.2 µm and therefore exhibited an increased risk of mechanical plaque retention. Obvious differences in surface structure were apparent, allowing conclusions to be drawn about the manufacturing method and subsequent reworking processes. Conclusion: Manually reworking the trans- and submucosal area of the investigated CAD/CAM zirconia abutments appears necessary to fulfil the conditions for optimal surface topography. The Sa value as arithmetic mean, taking the maximum height (Sz value) and surface excess (Sdr) into account, is an essential parameter for assessing the surface topography of implant abutments.
Keywords: CAD/CAM abutments; zirconia; surface roughness; soft tissue adhesion; focus variation microscopy
Authors: Krzysztof Stępień, Dariusz Janecki, Stanisław Adamczak
Affiliation: Kielce University of Technology
Abstract: Measurements of form deviations of 3D elements can be conducted with the use of various strategies, differing in a number and distribution of sampling points located on an investigated surface. Low number of sampling points or measured sections can lead to the situation that some surface irregularities are not detected by a measuring system. An application of higher density of sampling points, in turn, results in significant lengthening of measurement time, which is undesirable, if one takes into account requirements of modern manufacturing processes. This is authors propose to develop a novel, adaptive measurement strategy. Proposed adaptive strategy consists of two stages: a preliminary measurement and additional measurements. During the preliminary measurement an investigated area is scanned along preselected trajectory. If measurement results show that there is significant change of sensor readings in a certain fragment of an investigated surface, then we conduct additional measurements in the cross-section and in the longitudinal section that go across the area where the change of sensor readings occurred.
Keywords: form deviation, adaptive strategy, measurement