Abstract
Background: The roughness of denture base materials is mainly affected by inherent material features, the polishing technique, and the operator’s manual skills. The surface irregularities of the denture base resin’s roughness profile is one of the components characterizing the superficial topography of dental prostheses, and it is a critical parameter for describing surface morphology. Generally, the increment of the surface roughness minimizes cleanability and promotes the rate of bacterial adherence, affecting the expression of bacterial adhesins. The purpose of this in vitro study was to investigate the roughness of four commercially available denture base resins employed for removable prosthodontics. Methods: Twenty-five specimens were realized and submitted to observation for three dimensions (vertically, horizontally, 45°). Average surface roughness (Ra), Rv, Rp, and Rq were measured with a calibrated mechanical roughness tester (Taylor Hobson Surtronic 25; Taylor Hobson, Leicester, UK). Data were analyzed through a Kruskal–Wallis test. Results: Significant differences in Ra between the groups were assessed. Baltic Denture System™ (Merz Dental GmbH; Lütjenburg, Germania) showed a lower surface roughness coefficient and a more homogeneous surface. Conclusions: The functional importance of surface roughness parameters for denture base materials must be explored, not only considering recognized surface features.
Highlights
Publisher’s Note: MDPI stays neutralThe surface phenomena affect the morphology of dental prostheses, such as roughness [1]
Surface roughness is even an intrinsic property, and is one of the major clinical properties of the dental prosthesis which may be responsible for promotion of bacterial adhesion and biofilm organization [1,2,3]
This process is characterized by physicochemical interactions, including the hydrophobicity and charge of the bacterial cell surface and the morphology of the resin material, as well as the potential of microorganisms to adhere to different surfaces [1]
Summary
Publisher’s Note: MDPI stays neutralThe surface phenomena affect the morphology of dental prostheses, such as roughness [1]. Many factors, such as inaccuracy by the operator or in the device tools, or micro-scale irregularities, can alter the surface morphology [3]. The adhesion of microorganisms is the crucial phase for the colonization of the material, followed by the production of extracellular polymer substances [4,5]. This process is characterized by physicochemical interactions, including the hydrophobicity and charge of the bacterial cell surface and the morphology of the resin material, as well as the potential of microorganisms to adhere to different surfaces [1]. Several studies have investigated the relationship between surface roughness and bacterial adhesion, reporting contradictory results [6,7,8,9]
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