Fixation of the acetabular cup in cemented total hip replacement: Improving the anchorage hole profile using finite element method

Mootanah, Rajshree; Ingle, Paul; Dowell, John K.; Cheah, Kevin; Shelton, Julia C.

doi:10.3233/thc-2000-8603

Cited by 13 publications

(9 citation statements)

References 4 publications

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“…To explain the biomechanical behavior of the implant-supported FPD, the simple description of the mechanical responses of any containing component of the systems is necessary, but insufficient, because it is very difficult to achieve an analytical solution. Computational simulation by FE method is increasingly being used for several decades to understand how the body interacts with implant fixation, 17 such as these complex dental restorations. This method has become an efficient tool used for pre-clinical evaluation for orthopedics, orthodontics and cardiovascular surgery.…”

Section: Introductionmentioning

confidence: 99%

Effect of supporting implants inclination on stability of fixed partial denture: A finite element study

Boukhlif

Merdji

Roy

et al. 2020

Proc Inst Mech Eng H

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The aim of this finite element study was to analyze effect of supporting implants inclination on stress distribution in the bone for a four-unit fixed partial denture. A three-dimensional finite element model of mandibular molar section of the bone to receive implants was constructed. Three implant-supported fixed partial dentures, with null, moderate and wide tilting, of 0°, 15° and 30° implant inclinations, respectively, were modeled. A mechanical load of 10 MPa was applied in coronal–apical direction on bridge framework at the regions of crowns positions. The finite element analysis was performed, and von Mises stress levels were calculated. Peak stress concentration in the cortical bone was observed mostly around the implant necks, in inter-implants line. There was favorable stress distribution during loading, with peak stress being 90.04 MPa for 0°, which decreased to 54.33 MPa for 15° and 46.36 MPa for 30° inclination. The supporting implants inclination in fixed partial denture plays an important role in stress distribution and may be helpful in preventing bone loss and implant failure. This phenomenon is likely to be more pronounced in bones of poor quality. Within the limitation of this study, it seems that the inclination of implants in fixed partial denture has a favorable effect on stress distribution pattern values around the supporting implants.

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Section: Introductionmentioning

confidence: 99%

Effect of supporting implants inclination on stability of fixed partial denture: A finite element study

Boukhlif

Merdji

Roy

et al. 2020

Proc Inst Mech Eng H

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“…Fixation techniques have been reported to have profound effects on the torque resistance at the bone-cement interface [4][5][6][7][8][9][15][16][17][18][19][20][21][22][23][24][25]. This is in line with response obtained from the survey, that is, failure at the bone cement interface, including failure of the cement mantle and cement pegs, was the primary cause for revision surgery.…”

Section: Discussionmentioning

confidence: 65%

“…Whether the subchondral bone is maintained or removed when reaming the acetabulum. 4. The number of anchorage holes drilled, whether this differs from patient to patient, the distribution and location of the anchorage holes.…”

Section: Methodsmentioning

confidence: 99%

“…During cement fixation of the acetabular cup, anchorage holes are drilled in the acetabulum in order to increase the torsional and fatigue resistance of cement bonding at the bonecement interface. Previous finite element studies and laboratory investigations show that the stability of the acetabular cup is influenced by surgical fixation techniques [4][5][6][7][8][9]. However, there seems to be wide variations in the preparation of the acetabulum prior to cementation.…”

Section: Introductionmentioning

confidence: 99%

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Total Hip Replacement: Results of a Postal Survey of Current Practice on the Cement Fixation of the Acetabular Cup in the UK

et al. 2004

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Previous finite element studies and laboratory investigations on reconstructed acetabulum joints show that long-term fixation of the acetabular cup in total hip replacements (THRs) is influenced by surgical fixation techniques. The aim of this study is to determine and understand the reasons of current practice in the cement fixation of the acetabular cup in THRs in the UK. Following a pilot study, a postal survey was carried out among 1350 orthopaedic consultants. Response rate was 40% and data obtained from the returned questionnaires provided information about the current practice of 431 consultants with an average of 16.5 years of experience and who perform an average of 55 cemented THR operations annually. The survey showed wide variations in the fixation methods of the acetabular component. 95% of the respondents use cement to fix the acetabular cup, 46% maintain the subchondral bone and 63% use a flanged acetabular cup. The numbers of anchorage holes drilled vary from zero to thirty-six and drill diameters vary from 2 to 15 mm. Anchorage hole depths vary from 3 to 20 mm. Given the variability of surgical fixation methods, further studies need to be carried out to determine how fixation techniques could be improved to increase the longevity of the acetabular component in THRs. Further investigations could lead to a better understanding of the factors that contribute to the stability of THRs. (Hip International 2004; 14: 155-62).

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“…13 The stress distribution around the cement mantle should be smooth and peak stress should be low for better performance. 14…”

Section: Introductionmentioning

confidence: 99%

The effect of cement mantle thickness on strain energy density distribution and prediction of bone density changes around cemented acetabular component

Sanjay

Mondal

Bhutani

et al. 2018

Proc Inst Mech Eng H

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Cement mantle thickness is known to be one of the important parameters to reduce the failure of the cemented acetabular component. The thickness of the cement mantle is also often influenced by the positioning of the acetabular cup. The aim of this study is to determine the effect of uniform and non-uniform cement mantle thickness on strain energy density distribution and prediction of the possibility of bone remodelling around the acetabular region. Furthermore, tensile stress distribution in the cement mantle due to non-uniform cement mantle thickness was also investigated. Three-dimensional finite element models of intact and 17 implanted pelvic bone were developed based on computed tomography data sets. Results indicate that implantation with non-uniform cement thickness variation in the anterior-posterior direction has a significant influence on strain energy density distribution around the acetabulum as compared to thickness variation in the superior-inferior direction. Increase in density is predicted at the anterior part of the acetabulum, whereas density decrease is predicted at the posterior, inferior and superior part of the acetabulum. The non-uniform cement mantle thickness affected the tensile stress distribution in the cement mantle, in particularly superiorly placed acetabular cup. This study concludes that uniform cement thickness is desired for the longer success of the cemented acetabular component.

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Fixation of the acetabular cup in cemented total hip replacement: Improving the anchorage hole profile using finite element method

Cited by 13 publications

References 4 publications

Effect of supporting implants inclination on stability of fixed partial denture: A finite element study

Effect of supporting implants inclination on stability of fixed partial denture: A finite element study

Total Hip Replacement: Results of a Postal Survey of Current Practice on the Cement Fixation of the Acetabular Cup in the UK

The effect of cement mantle thickness on strain energy density distribution and prediction of bone density changes around cemented acetabular component

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