The Analysis of Wear on Artificial Hip Joint with Dimple on Femoral Surface

Abstract

This paper proposes the replacement of artificial hip joints which is one of the successful methods used to restore the movement of damaged hip bones. The main contribution of this work is to reduce wear caused by contact pressure between the femoral head and acetabular cup surfaces, where the average wear rate is very high. This can be achieved through the use of dimple on the femoral head surface from the artificial hip joint and subsequently computed by using the Archard equation. To validate the contact pressure accuracy of the proposed model, mesh sensitivity that used with 3 levels of mesh size are 1.2, 1.1 and 1.0. In this study for more accurate result, the mesh sensitivity used is with the mesh size of 1.0. The performance calculation results from wear are shown that in a hip joint using dimple the maximum contact pressure and the wear depth are decreased compared to the hip joint without dimple which are 67.25 MPa and 1.064 x10−10 mm from the previous value of 77.44 MPa and 1.185 x10−10 mm. Therefore, based on differences in the distribution of contact pressure that occurs shows volumetric wear on the hip joints using a dimple lower than without a dimple.

Study of Locking Compression Plate Through Biodegradable Implant

“…Because the weight of an adult person, which is determined by selecting the face area that is displayed in Figure 8a, is very close to the define weight at the femur head in the downward direction, we estimate that the maximum gait load in the current situation is 2000 N, and it acts in the downward z-direction. This conclusion is based on the information that is discussed in Ramadhoni et al (2020), and it acts in the downward z-direction.…”

Assessment of polyethylene wear in dual mobility implant for Asians on various head-to-liner ratios: A finite-element analysis

“…Archard's wear equation was then extensively used to calculate the wear on the liner surface of the hip prosthesis by many studies. 49–51 Also, an alternative well-known method for calculating wear according to Archard's law in a hip prosthesis was introduced by Pakhaliuk et al 52,53…”

“…Archard's wear equation was then extensively used to calculate the wear on the liner surface of the hip prosthesis by many studies. [49][50][51] Also, an alternative well-known method for calculating wear according to Archard's law in a hip prosthesis was introduced by Pakhaliuk et al 52,53 After a century of debate, it seems unlikely that a single governing equation will be created to account for all aspects of wear theory. For a wide variety of situations, however, both adhesive and abrasive, it has been shown that the wear volume W v (mm 3 ), load L (N), and sliding distance S L (m) are connected by an equation of the form:…”

Study of The Effect of Model Geometry and Body Mass Index on The Elastohydrodynamic Lubrication Performance of Metal-on-Metal Hip Joints

“…Minimizing the wear that occurs on metal to metal is essential to reduce the risk of adverse toxic side effects. So far, previous research has only aimed at optimization of THA implants, including optimization topology, geometric dimensions and addition of dimples Ramadhoni et al, 2020; with the aim of increasing hydrodynamic pressure and increasing the thickness of the lubrication film and material modification to minimize wear. Even though there are internal factors that can have an effect on poor results, namely body mass index towards obesity which results in an increase in complications of failure after THA implantation surgery.…”