Binnur Sagbas

• PhD
• Professor (Associate) at Yıldız Technical University

Highly crosslinked ultra-high molecular weight polyethylene (UHMWPE) with vitamin E (VE) as an antioxidant is widely accepted as a bearing material for joint implants. VE significantly helps in resisting oxidation, but it poses concerns about the loss of crosslink density and causes deterioration of the wear performance. This research aims to hypot...

The use of highly crosslinked ultra-high molecular weight polyethylene (UHMWPE) incorporating vitamin E (VE) as an antioxidant is widely acknowledged in the field of joint implants. While VE plays a crucial role in preventing oxidation, concerns have been raised regarding its impact on crosslink density, leading to wear performance deterioration. T...

Laser powder bed fusion (L-PBF), one of the additive manufacturing methods, has gained an important place in several fields like aviation, space biomedical, etc., due to its advantages, such as producing complex shaped parts with high quality in shorter times. On the contrary, disadvantages such as high surface roughness, low dimensional accuracy,...

Additive manufacturing (AM) is a newly developed technology for manufacturing parts from three-dimensional (3D) computer-aided design (CAD) models by depositing a material layer on layer. Multi-jet fusion (MJF) is one of the AM technologies that can be used for manufacturing functional parts like gear, linear, bearing, etc., by polymers. In various...

Our latest conference abstract about investigation of the physical and microstructural properties of the samples produced in single and multiple lasers with the laser powder bed fusion (L-PBF) method. In this study, it was determined that laser intersections do not have a negative effect on the printed part.

Light metal alloys are the most preferred materials in aerospace, defense and automotive industries because of their superior strength-to-weight ratio and high corrosion resistance. With the developments of additive manufacturing techniques, and especially the powder bed fusion method, it has become possible to generate three-dimensional and lightw...

This paper presents a comparative study on precision metrology systems such as Coordinate Measuring Machine (CMM), 3-Dimensional Scanning (3DS) and Computed Tomography (CT) for polymer additive manufacturing. A special test sample was designed and manufactured by Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS) AM systems. The ma...

Additive manufacturing (AM) technology, which has developed recently, is used in a wide range of application areas such as from the medical sector to aerospace and automotive industries. Laser powder bed fusion (LPBF) is one of the metal AM techniques which provide an opportunity to generate complex geometries. Although LPBF has been started to be...

Surface finish is an essential factor in determining product sustainability and functionality. Most methods have been developed that can be utilized to manufacture optical, mechanical, and electrical devices with a micrometer or submicrometric precision, nanoscale surface roughness, and practically no surface flaws. Finishing technologies are class...

Titanium alloys are widely used for biomedical applications as porous lattice structures whose abilities can be altered via unit cell designs, pore size, and topology. In this study, Ti6Al4V octahedron, star, and dodecahedron cubic and plate lattice structures were designed as 0.20-mm strut diameter with different porosity values (83.06% for octahe...

Background Additive manufacturing (AM) being an integral component of the production offers a wide variety of applications in the production of different components. The medical industry after the introduction of Additive Manufacturing has resulted in several advancements. The production of intricate patient-specific implants is one of such advance...

Laser powder bed fusion is a novel production technology that generates 3D geometries from CAD data of a functional part. It is a kind of additive manufacturing (AM) process that builds up the geometries layer-by-layer. Because of its layer based nature surface quality of manufactured parts is not its required level. Post processing operations such...

Additive Manufacturing (AM) is rapidly growing and widely used manufacturing technology for building up functional parts by metal, polymer, ceramic and their composites. Different AM methods have been developed for processing various materials in different feed stock such as filament, powder, resin, etc. Robocasting is one of the AM method for buil...

Multi Jet Fusion (MJF) is one of the newly developed additive manufacturing techniques, based on the use of powder bed fusion technology. It provides the opportunity to build up 3D, complex polymer geometries, without the need for support structures. This study evaluates the effect of build location across a 380 × 284 mm² build plate, on both the d...

Additive Manufacturing (AM) is a rapidly developing technology which provides opportunity to build up complex geometries due to the freedom of manufacturing. Lattice structures, three-dimensional open-celled structures composed of one or more repeating unit cells, can be produced with unique mechanical, thermal, acoustic, biomedical and electrical...

In the published article, Ahmet Sever is listed as the corresponding author, but the authors prefer that Binnur Sağbaş be considered the corresponding author. Correspondence regarding this article can be addressed to

Selective laser melting (SLM) is one of the most widely used metal additive manufacturing method which is based on powder bed fusion technology and provides opportunity to generate near net shape complex geometries from their CAD data. Surface quality of the SLM manufactured parts is highly affected by process parameters; however, effect of these p...

Three dimensional (3D) printed prostheses have emerging trends in recent years. They become popular with their cost-effective and easy to build structures which provided by the developments of the additive manufacturing technology. By these advancements, many open-source prosthetic hand models started to appear in the market. However, some of them...

Multi Jet Fusion is one the new Additive Manufacturing method which belongs to powder bed fusion technology class and used for additive manufacturing of polymer based parts. There are restricted number of research about this developing technology. In this study, it is aimed to investigate the effect of build orientation angle on surface quality and...

Powder bed fusion technology is one of the additive manufacturing methods that build up near net-shape complex parts from powder form of the material. Direct Metal Laser Sintering (DMLS) and Selective Laser Sintering (SLS) are primary powder bed fusion technology methods for metal and polymer materials respectively. AlSi10Mg is one of the most wide...

Direct metal laser sintering is a powder bed fusion type additive manufacturing (AM) method. It provides opportunity to create near net shape parts layer-by-layer. Because of poor surface quality post processing operations are required. This paper investigates the effect of surface finishing operations such as abrasive blasting, shot peening and po...

Additive manufacturing (AM) has great potential on manufacturing both polymer and metal parts as final product. However, optimization of surface texture quality has not been fully achieved yet. AM surfaces present variable textures that differs according to the AM methods and process parameters. Because of their unusual texture, it is important to...

Additive manufacturing (AM) is a layer-by-layer manufacturing method from 3D digital model, without using molds, fixtures and tools. This rapidly developing technology provides opportunity to obtain customized products with complex geometries, freeform shapes, internal cavities and lattice. However, lack of quality insurance procedures and policies...

Purpose The purpose of this paper is to investigate applicability of hexagonal boron nitride (h-BN) powder as a solid lubricant additive in coconut oil and to determine the tribological behavior of PEEK rubbed with DIN2080 tool steel, under prepared green lubricating condition. Design/methodology/approach In this study, tiribological performance...

Eriyik Yığma Modelleme (EYM), prototip ve model imalatının yanında son ürün olarak kullanılabilecek nitelikte fonksiyonel termoplastik parçaların da imalatında yaygın olarak kullanılan bir eklemeli imalat yöntemidir. EYM teknolojisi her ne kadar karmaşık parçaların imalatına imkan sağlıyor olsa da, elde edilen ürünlerin yüzey kalitesi henüz istenil...

Metallic implants such as Ti6Al4V and CoCrMo alloys have widely been used for bone regeneration. Because of the bio inertness of these materials bioactive surface coating become promising way for combination of mechanical strength of metal materials and bioactivity of 45S5 Bioglass coating material. Beside increasing bioactivity, surface coating is...

Additive Manufacturing (AM) is rapidly developing and promising manufacturing technology that provides independency in design and manufacturing of complex geometries. For controlling dimensional, geometrical and surface properties of these complex geometries, precision measurement techniques have to be developed in parallel with advanced manufactur...

for manufacturing prototypes, models and functional thermoplastic parts as final product. Although FDM technology provides opportunity for manufacturing complex geometries, surface quality of the products cannot reach the required value yet. For this reason post processing operations which are time consuming and over costing, are applied to the fin...

Additive Manufacturing (AM) is rapidly developing technology in biomedical implant manufacturing area. It provides the opportunity to produce custommade implants from 3D digital modeling of the desired prosthesis with complex geometries and different materials such as metal, ceramic and polymer. Although the researches are going on vigorously, ther...

Additive Manufacturing (AM) has become one of the most popular technologies for a wide range of industrial area that contains bio medical implant manufacturing sector. It provides the opportunity to produce custom-based implants from 3D digital modeling of the desired prosthesis with expected properties such as surface finish, appearance and streng...

Tribology is the science of interacting surfaces; when these surfaces are in a biological system, it is called as biotribology. With the increasing rate of joint replacement operations and need for artificial prosthesis, biotribology is becoming a very important and rapidly growing branch of tribology. Based on this fact, in this chapter, basic tri...

Purpose The aim of this study is to determine the effect of argon plasma surface modification on tribological properties of conventional ultra-high molecular weight polyethylene (UHMWPE) and vitamin E-blended UHMWPE. In previous studies, some researchers conducted a study on argon plasma surface modification of UHMWPE, but there is no study about a...

It is known from previous studies that frictional temperature rise on the surfaces of artificial joints could reach high levels that make hazardous effects on surrounding tissue and lubricant around the artificial joint. For enhancement the tribological behavior of the joints, new material combinations have been tried. In this study vitamin E blend...

Frictional heating of articulating surfaces may influence the rate of wear, fatigue, creep and oxidative degradation of bearing materials. Also temperature rise can damage the surrounding tissue and lubricant around the artificial joint and contributes insert loosening. The objective of this study is to determine temperature rise between sliding su...

Frictional heating makes detrimental effects on surrounding tissue and lubricant around the artificial hip joint. For reduction of this thermal damage, testing parameters and their effects were investigated by using the Taguchi method and analysis of variance. Ultra high molecular weight polyethylene (UHMWPE) acetabular liners and CoCrMo femoral he...

Ultra high molecular weight polyethylene (UHMWPE) has been the most commonly used bearing material in artificial hip and knee replacements. But wear and wear debris of UHMWPE has been the most important problem which cause aseptic loosening and revision surgery of these replacements. For enhangement of wear resistance, new generation UHMWPE materia...

Pure titanium and its alloys have been widely used in biomedical applications on account of their biological and mechanical properties. Although the mechanical properties of titanium provide acceptable responses under dynamic pressures, surface modifications are needed in order to improve osseointegration between bonefiimplant interfaces. There are...

Friction between articulating surfaces cause temperature rise in the acetabular cup and femoral head. This heating may influence the rate of wear, fatigue, creep and oxidative degradation of bearing materials. The objective of this study is to determine the effect of surface patterning on frictional temperature rise of the articulating surfaces of...

Friction between articulating surfaces cause temperature rise in acetabular cup and femoral head. This heating may influence the rate of wear, fatigue, creep, oxidative degradation of bearing materials and may terminate surrounding tissue. The objective of this study is to determine temperature rise with different applied load for the articulating...

Previous measurements of frictional temperature rise on the surfaces of artificial joints have shown that temperature values could reach high levels that make hazardous effects on surrounding tissue and lubricant around the artificial joint. For reduction of this thermal damage, testing parameters and their effects were investigated by using Taguch...

Wear in orthopedic prosthesis has been the main limiting factor of total joint replacement's service life. Wear analysis of total joint replacements is essential for determining failure mechanism, prediction of wear and longevity of implants. So it would be possible to improve design, material and manufacturing quality and service life of these dev...

Frictional behaviors of articulating surfaces have been recognized as critical factors affecting their service life because these behaviors play very important role on wear of ultrahigh molecular weight polyethylene (UHMWPE) which causes failure of artificial joint replacements. The objective of this study is to determine temperature rise as a func...

Biotribological behavior like friction, lubrication and wear are primary failure factors for articulating surfaces and these behaviors affect the service life of the prosthesis. Friction between articulating surfaces cause temperature rise in acetabular cup and femoral head. This heating may influence the rate of wear, fatigue, creep and oxidative...

ZET Biyomekanik alanda özellikle insan vücudunda kullanılan, çok karmaşık geometri ve anatomilere sahip olabilen implantların modellenebilmesi için uzun yıllardır ölçme tekniği ve değerlendirme metodlarına başvurulmaktadır. Bugün endüstride sıkça kullanılan koordinat ölçme sistemlerinin yanı sıra birkaç farklı 3D yüzey ölçme metodu da diz, kalça ke...