Biosurface and Biotribology

Abstract Here, we present and synthesise some recent collaborative efforts in our laboratories to establish protocols for using dental microwear texture analysis, originally developed to reconstruct diets of fossil mammals and to aid in the clinical assessment of dental patients today. The idea is to propose a method where polyvinylsiloxane impressions, as used in many dental practices, can be combined with surface texture analysis for a rapid, non‐invasive, and inexpensive approach to detect and monitor the progression of tooth wear at fine scales over short durations and help determine causal agents of dental tissue loss. We employed both in vitro experimentation and in vivo analysis for abrasion and erosion of enamel and dentin surfaces. Three‐dimensional point clouds of impression surfaces were generated using a scanning confocal profiler and analysed using both standard ISO and scale‐sensitive fractal analysis approaches. The authors’ results indicate that texture attributes distinguish sound, abraded, and eroded surfaces. Furthermore, microwear textures can parse erosive tooth wear by the causal pH level and duration of exposure. These and other related studies indicate that dental microwear texture analysis holds potential for determining the aetiology of pathological tooth wear and for the clinical assessment and monitoring of dental patients at risk for excessive dental tissue loss at fine scales over short intervals.

Peter S. Ungar

Anderson T. Hara

On the use of dental microwear texture analysis to determine aetiology and assess wear of dental tissues for clinical evaluation

关于使用牙科微磨损纹理分析确定病因并评估牙组织磨损以进行临床评价的研究

Abstract As a third‐generation titanium alloy, Ti13Nb13Zr is widely used in the field of biomedicine due to its advantages such as low elastic modulus, high strength, high toughness, high fatigue strength, corrosion resistance, and good biocompatibility. However, the biological inertness of Ti13Nb13Zr alloy limit their wide application as biomedical implant materials. In this study, the bioactive TiO 2 nanotubes was prepared on Ti13Nb13Zr alloy by anodisation and heat treatment method. The bioactivity of Ti13Nb13Zr was evaluated by immersing the samples into the simulated body fluid for 20 days. Results show that the Ti13Nb13Zr alloy coated with anatase nanotubes has the superior ability of hydroxyapatite formation.

Xingping Fan

Wei Fan

Preparation and biological activity study of Ti13Nb13Zr surface nanotubes

Ti13Nb13Zr表面纳米管的制备及生物活性研究

Abstract While the erosive potential of acidic beverages has been known for decades, many new and increasingly popular beverages and food fads have not been evaluated quantitatively for their dental associated risks. In this study, the authors utilise atomic force microscopy to monitor changes in the surface morphology of an enamel mimic, hydroxyapatite (HA), induced by hard seltzer and kombucha. The primary causes of enamel degradation were assessed through a combinatorial investigation probing the impact of carbonation, acid type, acid concentration, and saliva. The average surface roughness of HA discs was determined after successive demineralisation steps. The heterogeneity of the decay process was assessed using multiple spatial replicates per sample. To aid in the interpretation of the HA decay profiles, pH and titratable acidity of each beverage were also measured. The authors find that, in comparison to a reference sample of Coca‐Cola®, kombucha is equally erosive after prolonged exposure while hard seltzer results in relatively minor surface damage. In addition, the presence of saliva was found to eliminate any measurable amounts of decay. Results from this study demonstrate the potential damage more recently popularised beverages can have on dental enamel and the significant dependence of oral health on the presence of saliva.

Andy Erickson

Emily Rond

Shannen L. Cravens

Investigating the demineralisation of hydroxyapatite by kombucha and hard seltzer using atomic force microscopy

使用原子力显微镜研究康普茶和硬苏打水对羟基磷灰石的去矿化作用

Abstract Friction between the contact lens (CL) and the corneal or conjunctival surfaces is considered one of key factors in triggering CL‐associated adverse effects. However, the relationship between friction properties and these effects remains unclear. Traditional measurement methods often fail to replicate real‐life conditions, thereby highlighting the need for more effective apparatus. In this study, the authors developed an optimised pendulum apparatus integrated with an inclinometer to enhance the measurement of CL friction coefficients, thereby improving its precision and relevance to clinical settings. This new design allows for faster and easier calculation of the friction coefficient based on the amplitude decay per libration cycle, surpassing the accuracy of previous video‐based methods. The pendulum's hemisphere component was made from ethylene–propylene–diene monomer rubber (EPDM) 30, which has an elastic modulus similar to that of a human eyeball, creating a measurement environment that closely mimics real‐world usage. The authors optimised the apparatus by evaluating the effects of hemisphere stiffness and saline volume on the friction coefficient. Measurements of multiple lenses recorded by the authors, particularly Lens A, made of narafilcon A, revealed significant consistency across different hemisphere materials with an optimal saline volume of 150 μL yielding a friction coefficient of 0.026 ± 0.003. No statistically significant differences in the friction coefficients were found across variations in the lens base curve, diameter, centre thickness, or power. This improved apparatus demonstrates the capability of effectively measuring friction coefficients under conditions that simulate clinical usage, providing rapid and reliable results. The findings validate the apparatus and suggest its potential for broader applications in assessing CL properties, thereby facilitating future research on the material characteristics and safety of various CLs, including decorative lenses.

Ryusuke Nakaoka

Hiroko Iwashita

Yuichi Hori

Kiyoshi Mabuchi

Toru Matsunaga

Yuji Haishima

Eiichi Yamamoto

Improvement of a pendulum‐type apparatus for friction test of a contact lens to simulate the conditions of its actual usage

改进用于模拟接触镜实际使用条件下摩擦测试的摆锤型装置

Abstract The purpose of this research is to develop data‐driven machine learning (ML) models capable of estimating the specific wear rate of ultra‐high molecular weight polyethylene (UHMWPE) used in hip replacement implants. The results of the data‐driven models are demonstrating a high level of consistency with the experimental findings acquired from the pin‐on‐disk (POD) trials. With a performance evaluation of 0.06 mean absolute error (MAE), 0.17 Root Mean Square Error (RMSE), and 0.96 R 2 , the Random Forest Regression is found to be the best model. Another machine learning model, called Gradient Boosting Regression, is also found to possess satisfactory predictive performance by having an MAE of 0.09, RMSE of 0.24, and R 2 of 0.96. According to the findings of a parametric analysis that made use of an ML model, the surface texture geometry has a substantial dependence on the wear behaviour of UHMWPE bearings that are used in hip replacement implants. This strategy has the potential to enhance experiment design and lessen the necessity for time‐consuming POD trials for the purpose of assessing the wear of hip replacement implants.

Vipin Kumar

Ravi Prakash Tewari

Anubhav Rawat

Machine learning‐based investigations of the effect of surface texture geometry on the wear behaviour of UHMWPE bearings in hip joint implants

基于机器学习的超高分子量聚乙烯髋关节植入物表面纹理几何对磨损行为影响的研究

Abbreviation	Biosurf. Biotribol.
Journal Impact	1.56
Quartiles(Global)	MATERIALS SCIENCE, BIOMATERIALS(Q4)

Publication Information	Publisher: John Wiley and Sons Inc，Publishing cycle: ，Journal Type: journal，Open Access Journals: Yes
Basic data	Year of publication: 2019，Proportion of original research papers: 0.00%，Self Citation Rate:6.20%， Gold OA Rate: 90.28%
Journal Fees	$2200Details
Average review cycle	网友分享经验：11 Weeks

Biosurface and Biotribology

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On the use of dental microwear texture analysis to determine aetiology and assess wear of dental tissues for clinical evaluation

Preparation and biological activity study of Ti13Nb13Zr surface nanotubes

Investigating the demineralisation of hydroxyapatite by kombucha and hard seltzer using atomic force microscopy

Improvement of a pendulum‐type apparatus for friction test of a contact lens to simulate the conditions of its actual usage

Machine learning‐based investigations of the effect of surface texture geometry on the wear behaviour of UHMWPE bearings in hip joint implants

On the use of dental microwear texture analysis to determine aetiology and assess wear of dental tissues for clinical evaluation

Investigating the demineralisation of hydroxyapatite by kombucha and hard seltzer using atomic force microscopy

Preparation and biological activity study of Ti13Nb13Zr surface nanotubes

Improvement of a pendulum‐type apparatus for friction test of a contact lens to simulate the conditions of its actual usage

Machine learning‐based investigations of the effect of surface texture geometry on the wear behaviour of UHMWPE bearings in hip joint implants

ISSN	2405-4518
h-index	8