In Vitro Evaluation of the Acetabular Cup Primary Stability by Impact Analysis

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Adrien Michel ◽  
Romain Bosc ◽  
Romain Vayron ◽  
Guillaume Haiat
Keyword(s):  
Impact Analysis ◽  
Primary Stability ◽  
Bovine Bone ◽  
Acetabular Cup ◽  
Hip Prostheses ◽  
Press Fit ◽  
The Press ◽  
Force Signal ◽  
The Impact

The implant primary stability of the acetabular cup (AC) is an important parameter for the surgical success of press-fit procedures used for the insertion of cementless hip prostheses. In previous studies by our group (Mathieu, V., Michel, A., Lachaniette, C. H. F., Poignard, A., Hernigou, P., Allain, J., and Haiat, G., 2013, “Variation of the Impact Duration During the in vitro Insertion of Acetabular Cup Implants,” Med. Eng. Phys., 35(11), pp. 1558–1563) and (Michel, A., Bosc, R., Mathieu, V., Hernigou, P., and Haiat, G., 2014, “Monitoring the Press-Fit Insertion of an Acetabular Cup by Impact Measurements: Influence of Bone Abrasion,” Proc. Inst. Mech. Eng., Part H, 228(10), pp. 1027–1034), the impact momentum and duration were shown to carry information on the press-fit insertion of the AC within bone tissue. The aim of the present study is to relate the impact momentum recorded during the AC insertion to the AC biomechanical primary stability. The experimental protocol consisted in testing 13 bovine bone samples that underwent successively series of 15 reproducible mass falls impacts (5 kg, 5 cm) followed by tangential stability testing. Each bone sample was tested with different hole sizes in order to obtain different stability configurations. The impact momentum and the tangential primary stability reach a maximum value for an interference fit equal to around 1 mm. Moreover, a correlation between the impact momentum and the stability was obtained with all samples and all configuration (R2 = 0.65). The implant primary stability can be assessed through the measurement of the impact force signal analysis. This study opens new paths for the development of a medical device which could be used as a decision support system to assist the surgeon during the insertion of the AC implant.

scholarly journals Effect of bearing friction torques on the primary stability of press-fit acetabular cups: A novel in vitro method

2018 ◽  
Vol 36 (10) ◽  
pp. 2745-2753 ◽  
Author(s):  
Alexander Jahnke ◽  
Stefan Schroeder ◽  
Carlos A. Fonseca Ulloa ◽  
Gafar A. Ahmed ◽  
Bernd A. Ishaque ◽  
...  
Keyword(s):  
Primary Stability ◽  
In Vitro Method ◽  
Press Fit ◽  
Bearing Friction

scholarly journals Estimation of the primary stability of the press-fit and screwed-in acetabular components after hip joint arthroplasty

2017 ◽  
Vol 0 (1) ◽  
pp. 92-97
Author(s):  
Oleg Loskutov ◽  
Nadiia Naumenko ◽  
Oleksandr Loskutov ◽  
Dmytro Syniehubov ◽  
Dmytro Gorobets ◽  
...  
Keyword(s):  
Hip Joint ◽  
Primary Stability ◽  
Joint Arthroplasty ◽  
Press Fit ◽  
The Press ◽  
Acetabular Components

Characterization of Acetabular Cup Insertion Forces in Cancellous Bone Proxy for Validation of an Invasive Sensing Model and Development of Automatic Prosthesis Installation Device: A Preliminary Study

2020 ◽  
Vol 15 (2) ◽  
Author(s):  
Kambiz Behzadi ◽  
Jesse Rusk
Keyword(s):  
Force Feedback ◽  
Primary Stability ◽  
The United States ◽  
Assistive Technologies ◽  
Medical Procedure ◽  
Implant Stability ◽  
Acetabular Cup ◽  
Total Hip ◽  
Press Fit ◽  
Preliminary Study

Abstract Total hip replacement is a widespread medical procedure, with over 300,000 surgeries performed each year in the United States alone. The vast majority of total hip replacements utilize press fit fixation. Successful seating of the implant requires a delicate balance between inserting the implant deep enough to obtain sufficient primary stability, while avoiding fracture of bone. To improve patient outcomes, surgeons need assistive technologies that can guide them as to how much force to apply and when to stop impacting. The development of such technology, however, requires a greater understanding of the forces experienced in bone and the resulting cup insertion and implant stability. Here, we present a preliminary study of acetabular cup insertion into bone proxy samples. We find that as the magnitude of force on the acetabular cup increases, cup insertion and axial extraction force increase linearly, then nonlinearly, and finally plateau with full insertion. Within the small nonlinear zone, approximately 90% of both cup insertion and extraction force are achieved with only 50% total energy required for full seating, posing the question as to whether full seating is an appropriate goal in press-fit arthroplasty. For repeated impacts of a given energy, cup displacement and force experienced in bone (measured force profile—MFP) increase correspondingly and reach a plateau over a certain number of impacts (number of impacts to seating—NOITS), which represents the rate of insertion. The relationship between MFP and NOITS can be exploited to develop a force feedback mechanism to quantitatively infer optimal primary implant stability.

Monitoring the press-fit insertion of an acetabular cup by impact measurements: Influence of bone abrasion

2014 ◽  
Vol 228 (10) ◽  
pp. 1027-1034 ◽  
Author(s):  
Adrien Michel ◽  
Romain Bosc ◽  
Vincent Mathieu ◽  
Philippe Hernigou ◽  
Guillaume Haiat
Keyword(s):  
Acetabular Cup ◽  
Press Fit ◽  
The Press

scholarly journals In Vitro Effect of Drilling Speed on the Primary Stability of Narrow Diameter Implants with Varying Thread Designs Placed in Different Qualities of Simulated Bone

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1350
Author(s):  
Georgios E. Romanos ◽  
Daniel J. Bastardi ◽  
Rachel Moore ◽  
Apoorv Kakar ◽  
Yaro Herin ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Primary Stability ◽  
Drilling Speed ◽  
Group A ◽  
The One ◽  
Group B ◽  
Vitro Effect ◽  
The Impact ◽  
Narrow Diameter Implants

It is hypothesized that there is no statistically significant impact of drilling speed (DS) on the primary stability (PS) of narrow-diameter implants (NDIs) with varying thread designs placed in dense and soft simulated bone. The aim of this in vitro study was to evaluate the impact of DS on the PS of NDIs with varying thread designs placed in dense and soft simulated bone. Two hundred and forty osteotomies for placement of various implant macro-designs were divided into three groups (80 implants per group): Group A (NobelActive, 3.0/11.5 mm); Group B (Astra OsseoSpeed-EV, 3.0/11 mm); and Group C (Eztetic-Zimmer, 3.1/11.5 mm) implants. These implants were placed in artificial dense and soft simulated bone using DSs of 800 and 2000 revolutions per minute (RPM). Resonance frequency analysis (RFA) and implant stability quotient (ISQ) were assessed. Group comparisons were performed using the one-way analysis of variance with Tukey’s post hoc tests. Level of significance was set at P < 0.05. In groups A and B, there was no difference in the ISQ for NDIs inserted in dense bone at 800 and 2000 RPM. In Group C, ISQ was significantly higher for NDIs placed in dense bone at 800 PRM compared to 2000 RPM (P < 0.05). In Group A, ISQ values were significantly higher for NDIs inserted in soft bone at 2000 RPM as compared to those inserted at 800 RPM (P < 0.05). For NDIs, a lower drilling speed in dense artificial simulated bone and a higher drilling speed in soft artificial simulated bone is associated with high primary stability.

scholarly journals The impact of the size of bone substitute granules on macrophage and osteoblast behaviors in vitro

2021 ◽  
Author(s):  
Masako Fujioka-Kobayashi ◽  
Hiroki Katagiri ◽  
Michihide Kono ◽  
Benoit Schaller ◽  
Tateyuki Iizuka ◽  
...  
Keyword(s):  
Cell Viability ◽  
Bone Regeneration ◽  
Bone Substitute ◽  
Size Group ◽  
Bovine Bone ◽  
Carbonate Apatite ◽  
Mrna Levels ◽  
Differentiation Potential ◽  
The Impact

Abstract Objective Bone substitute (BS) size might influence the clinical outcomes of guided bone regeneration (GBR) procedures. The aim of the present study was to investigate the influence of BS size on macrophage (Mφ) and osteoblast behaviors in vitro. Materials and methods Two different granule sizes (S and M/L) were assessed for four different commercial BSs: deproteinized bovine bone mineral (DBBM), biphasic calcium phosphate type 1 (BCP1), BCP type 2 (BCP2), and carbonate apatite (CO3Ap). The BSs were compared for their impacts on the cell viability and differentiation potential of THP-1-derived Mφs and human osteoblast-like Saos-2 cells. Results The smaller granules showed higher material volumes and surface areas than the larger granules. Significantly higher viability of Mφs and Saos-2 cells was observed with the DBBM_L-size granules than with the DBBM_S-size granules. Gene expression experiments in Mφs revealed few differences between the two sizes of each BS, although higher CD206 mRNA levels were observed in the BCP1_L group and the CO3Ap_M group than in the respective S-size groups on day 1. Only DBBM showed significantly higher mRNA levels of osteogenic markers, including Runx2 and osteocalcin, in Saos-2 cells in the S-size group than in the L-size group. Conclusions The S-size and L-size DBBM granules exhibited clear differences in cell outcomes: cells cultured on the S-size granules exhibited lower cell viability, higher osteopromotive ability, and no noticeable Mφ polarization changes. Clinical relevance A smaller granule size might be advantageous due to greater bone regeneration potential in the use of DBBM granules to treat defects.

scholarly journals Influence of Implant Design and Under-Preparation of the Implant Site on Implant Primary Stability. An In Vitro Study

2020 ◽  
Vol 17 (12) ◽  
pp. 4436 ◽  
Author(s):  
Mariano Herrero-Climent ◽  
Bernardo Ferreira Lemos ◽  
Federico Herrero-Climent ◽  
Carlos Falcao ◽  
Helder Oliveira ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Primary Stability ◽  
Implant Design ◽  
Insertion Torque ◽  
Bovine Bone ◽  
Preparation Technique ◽  
Implant Stability ◽  
The One ◽  
Two Parameters

The aim of this study was to evaluate the effects of different implant sites an under-preparation sequence associated with two different implant designs on implant primary stability measured by two parameters: insertion torque (IT) and implant stability quotient (ISQ). It used two different implants: one cylindrical as a control and another one with a tapered design. The implants were inserted in type III fresh humid bovine bone and four drilling sequences were used: one control, the one proposed by the implant company (P1), and three different undersized (P2, P3 and P4). P2 was the same as P1 without the cortical drill, P3 was without the last pilot drill and P4 was without both of them. The sample size was n = 40 for each of the eight groups. Final IT was measured with a torquemeter and the ISQ was measured with Penguin resonance frequency analysis. Results showed that both ISQ and IT have a tendency to increase as the preparation technique reduces the implant site diameter when compared with the standard preparation, P1. The preparations without cortical drill, P2 and P4, showed the best results when compared with the ones with a cortical drill. Tapered implants always showed higher or the same ISQ and IT values when compared with the cylindrical implants. Giving the limitations of this study, it can be concluded that reducing implant preparation can increase IT and ISQ values. Removing the cortical drill and the use of a tapered design implant are also effective methods of increasing primary implant stability.

Impact of Bone Quality and Implant Type on the Primary Stability: An Experimental Study Using Bovine Bone

2015 ◽  
Vol 41 (2) ◽  
pp. 144-148 ◽  
Author(s):  
Sukumaran Anil ◽  
Abdullah Alfarraj Aldosari
Keyword(s):  
Bone Quality ◽  
In Vitro Study ◽  
Primary Stability ◽  
Tissue Level ◽  
Bovine Bone ◽  
Type Ii ◽  
Removal Torque ◽  
Type Iv ◽  
Bone Level

The purpose of this in vitro study was to compare the primary stability and removal torque of bone level and tissue level implants in different bone qualities. Twenty tissue level and bone level implants (3.3 × 10 mm and 4.1 × 10 mm) were used for assessing the stability in type II and type IV bone. Forty bovine rib blocks were used in this study. The primary stability of the implant was measured by the resonance frequency using an Osstel device. The removal torque values (RTV) of the implants was assessed using a digital torque gauge instrument. The implant stability quotient (ISQ) values and the RTV showed a marginally higher stability with bone level implants as compared to tissue level implants. However, these differences were not statistically significant in both type of bone used (P &gt; 0.05). On the other hand, compared to type IV, type II bone showed significant differences in the ISQ (P &lt; 0.01) and RTV (P &lt; 0.001) of bone level and tissue level implants. The study concluded that bone quality is an important factor in establishing primary stability than the implant dimension. Bone level and tissue level implants of same dimensions can be selected based on the esthetic demands since they showed similar mechanical properties.

scholarly journals Press-Fit Evaluation and Study of Displacement in Temperature Changes

2018 ◽  
Vol 68 (1) ◽  
pp. 103-108
Author(s):  
Peter Šlesar ◽  
Roland Jančo
Keyword(s):  
Structural Analysis ◽  
The Body ◽  
Radial Clearance ◽  
Temperature Changes ◽  
Press Fit ◽  
The Press ◽  
Individual Effects ◽  
Specific Shape ◽  
The Impact ◽  
Bearing Analysis

Abstract The article is devoted to bearing analysis, which has a specific shape. The outer ring is the body directly and the inner ring is the case. To determine optimal radial clearance or overlap are used the thermal / structural analysis. The article is logically divided into two parts. In the first analysis, was monitored the impact of the press-fit of the case into the body. In the second analysis, there are presented attained results in graphical outputs of displacements in the orbits at different operating temperatures. At the end of the article were evaluated and researched individual effects on bearing deformation.

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