Interface Micromotion of Cementless Hip Arthroplasty: Collared vs Non-collared Stems

Kadir, Mohammed Rafiq Abdul; Kamsah, Nazri; Mohlisun, N.

doi:10.1007/978-3-540-69139-6_109

Cited by 9 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effect was also seen in other THAs and prevents distal stiffening of the bone as well as stress shielding. A finite element model by Kadir et al also could not demonstrate an effective reduction in micromotion using collared hip stems [24]. This could be due to the fact that the collar prevents subsidence, which reduces further press-fit and therefore decreases primary stability of the stem.…”

Section: Discussionmentioning

confidence: 97%

“…Second, this biomechanical model is a simplification without any muscle forces or tension band effect, such as the tractus iliotibialis. Other experimental set-ups of both human and artificial bones are also described in the literature without the use of muscle tensions [12,15,19,[24][25][26][27]. Stiffening the bone due to this tension band effect resulted in reduced bone bending, which can lead to decreased micromotions.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of a collar on primary stability of standard and undersized cementless hip stems: a biomechanical study

Kistler,

Steinbrück,

Schmidutz

et al. 2024

Arch Orthop Trauma Surg

View full text Add to dashboard Cite

Introduction Aseptic loosening and periprosthetic fractures are main reasons for revision after THA. Quite different from most other stem systems, Corail cementless hip stems show better survival rates than their cemented counterpart, which can possibly be explained by the use of a collar. The study aimed to investigate primary stability with standard and undersized hip stems both collared and collarless. Materials and methods Primary stability of cementless, collared and collarless, femoral stems was measured in artificial bones using both undersized and standard size. After preconditioning, 3D micromotion was measured under cyclic loading at the bone-implant interface. Results The use of a collar resulted in higher micromotion within the same stem size but showed no statistically significant difference for both standard and undersized hip stems. The collared and collarless undersized stems showed no significant differences in 3D micromotion at the upper measuring positions compared to the standard stem size. Micromotion was significantly higher in the distal measuring positions, with and without collar, for the undersized stems (vs. standard collarless stem size). Conclusion The key finding is that the collarless and collared Corail hip stems, within one stem size, showed no significant differences in primary stability. Undersized stems showed significantly higher micromotion in the distal area both with and without collar.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

The effect of a collar on primary stability of standard and undersized cementless hip stems: a biomechanical study

Kistler,

Steinbrück,

Schmidutz

et al. 2024

Arch Orthop Trauma Surg

View full text Add to dashboard Cite

show abstract

“…2a). Finite element method is a technique to find out solutions to boundary value problems and It utilizes variational methods to produce a stable solution [6,7,8,9,10]. All materials were assumed linear, homogenous, elastic and isotropic [3,11,12].…”

Section: Methodsmentioning

confidence: 99%

Influence of Polyethylene Thickness on Axis Pin in Linked Elbow Implant

Heidari

Harun

Syahrom

2013

AMR

View full text Add to dashboard Cite

Elbow joint failure results in weakness, instability, pain and loss of motion. Total Elbow replacement is last way to relief pain and instability. One of available complications after total elbow replacement is bushing wear. Excessive bushing wear may cause instability, pain and inflammatory reply to implant loosening. New prosthetic designs is probably responsible for positive changes to decrease complications. The aim of the present study was to analyze effect of ulnar bushing thickness on transmitted stress to axis pin in linked elbow implant. Axis pin, humeral/ulnar components and polyethylene bushings were modeled. All materials were assumed linear, homogenous, elastic and isotropic. A 50 N force was applied in tip of ulnar component. Distal and proximal of humeral component were fixed. Results showed maximum stress at 94 MPa for axis pin contacting ulnar bushing with 10mm outer diameter while values were 111MPa and 138MPa for ulnar bushing with 9mm and 8mm outer diameters respectively. The present study demonstrates that changing bushing thickness affects stress of axis pin.

show abstract

“…Prendergast et al 143 reported that the presence of a collar in a hip implant reduced bone resorption and achieved stress distribution identical to that of an intact femur. Abdul-Kadir et al 144 investigated the mechanical effect of a collar on a generic cement-free hip stem and discovered that the collar improved stability by limiting micro-motion in the stem's distal and medial regions. Al-Dirini et al 145 examined the mechanical characteristics of collared stems using a Corail hip stem placed within a femur aged 50-80 years.…”

Section: Collared and Collarless Stemmentioning

confidence: 99%

Advancement in total hip implant: a comprehensive review of mechanics and performance parameters across diverse novelties

Soliman,

Islam,

Chowdhury

et al. 2023

J. Mater. Chem. B

View full text Add to dashboard Cite

show abstract

Interface Micromotion of Cementless Hip Arthroplasty: Collared vs Non-collared Stems

Cited by 9 publications

References 15 publications

The effect of a collar on primary stability of standard and undersized cementless hip stems: a biomechanical study

The effect of a collar on primary stability of standard and undersized cementless hip stems: a biomechanical study

Influence of Polyethylene Thickness on Axis Pin in Linked Elbow Implant

Advancement in total hip implant: a comprehensive review of mechanics and performance parameters across diverse novelties

Contact Info

Product

Resources

About