scholarly journals Revision of a Fractured Uncemented Revision Stem Using a Custom Designed Punch and Retrograde Through-Knee Approach

2015 ◽  
Vol 2015 ◽  
pp. 1-3 ◽  
Author(s):  
P. J. Nasr ◽  
G. S. Keene
Keyword(s):  
Femoral Stem ◽  
Cobalt Chromium ◽  
Unique Case ◽  
Revision Stem ◽  
Unique Method ◽  
Modular Prostheses ◽  
Revision Prosthesis ◽  
Macroscopic Examination ◽  
Modular Component ◽  
Uncemented Femoral Stem

We report a unique case of a fractured modular cobalt chromium connection taper Revitan (Zimmer, Warsaw, IN) revision prosthesis. Macroscopic examination revealed a fracture at the diaphyseal-metaphyseal junction of this modular component. This report highlights that fractures can still occur with modern modular prostheses. We are not aware of any published failures of the Revitan revision prosthesis. We also describe a unique method of retrieval for a broken well fixed uncemented femoral stem, using a custom designed extraction instrument via a through-knee approach.

scholarly journals Differences in subsidence rate between alternative designs of a commonly used uncemented femoral stem

2016 ◽  
Vol 13 (4) ◽  
pp. 322-326 ◽  
Author(s):  
Munnan Al-Najjim ◽  
Usman Khattak ◽  
Juluis Sim ◽  
Iain Chambers
Keyword(s):  
Femoral Stem ◽  
Subsidence Rate ◽  
Alternative Designs ◽  
Uncemented Femoral Stem

scholarly journals Experience in use of Wagner SL Revision Stem for Revision Hip Arthroplasty

2014 ◽  
pp. 40-45
Author(s):  
G. M. Kavalerskiy ◽  
V. Yu. Murylyov ◽  
Ya. A. Rukin ◽  
M. Yu. Kholodaev ◽  
P. M. Elizarov
Keyword(s):  
Hip Arthroplasty ◽  
Femoral Stem ◽  
Revision Hip Arthroplasty ◽  
Femoral Bone ◽  
Defect Type ◽  
Hip Implant ◽  
Femoral Defect ◽  
Revision Stem

Experience in revision hip arthroplasty with change of femoral stem was analyzed for 165 patients. In 107 operations (64.8%) Wagner SL Revision Stems were used, in the rest of cases - femoral components of other manufacturers. Distribution of patients by femoral defect type by Paprovsky was the following: I type - 27 patients, II type - 75, IIIA type - 59, IIIB and IV type - 4 patients. Good results at use of Wagner SL Revision Stems and stems of other manufacturers were comparable and made up 87.9 and 86.2%, respectively. Achieved data enabled to make conclusion that Wagner SL Revision Stem use is reasonable for patients with hip implant instability in I-IIIA femoral bone deficit, as they are cheaper than the modular revision stems and their design prevents the wear in the area of modular junction.

A unique case of bilateral triceps avulsion fracture in a patient with pseudohypoparathyroidism

2019 ◽  
pp. 175857321987655
Author(s):  
Ali-Asgar Najefi ◽  
Peter Domos
Keyword(s):  
Avulsion Fracture ◽  
Unique Case ◽  
Double Row ◽  
Avulsion Fractures ◽  
Unique Method ◽  
Tendon Ruptures ◽  
Triceps Tendon ◽  
Double Row Repair ◽  
Suture Anchor Fixation ◽  
Anchor Fixation

Triceps tendon ruptures and avulsions are rare injuries and are often associated with systemic diseases. This paper illustrates the unique case of a 20-year-old female patient with pseudohypoparathyroidism, who sustained bilateral triceps avulsion fractures after a fall. She underwent suture anchor fixation, augmented with tension band suture as double row repair with excellent post-operative results. We describe the pathophysiology of this injury and the unique method of fixation, which can be an alternative effective method to repair these injuries.

Uncemented femoral revision arthroplasty using the modular revision prosthesis MRP-TITAN revision stem

2008 ◽  
Vol 3 (2) ◽  
pp. 98-108
Author(s):  
T. Mumme ◽  
R. Müller-Rath ◽  
S. Andereya ◽  
D. C. Wirtz
Keyword(s):  
Revision Arthroplasty ◽  
Femoral Revision ◽  
Revision Stem ◽  
Revision Prosthesis

Measurement of bone mineral density by dual-energy x-ray absorptiometry in patients with the Wisconsin hip, an uncemented femoral stem

1996 ◽  
Vol 11 (2) ◽  
pp. 184-193 ◽  
Author(s):  
B. Jenny Kiratli ◽  
Mary M. Checovich ◽  
Andrew A. McBeath ◽  
Michael A. Wilson ◽  
John P. Heiner
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Femoral Stem ◽  
Dual Energy ◽  
Mineral Density ◽  
X Ray ◽  
Uncemented Femoral Stem

Gross Stem Taper Failure with Head Dissociation in a Very Active Patient with an Uncemented Femoral Stem

2020 ◽  
Vol 10 (3) ◽  
pp. e19.00662-e19.00662
Author(s):  
Valerie Polster ◽  
Robert Hube ◽  
Michael M. Morlock
Keyword(s):  
Femoral Stem ◽  
Stem Taper ◽  
Active Patient ◽  
Uncemented Femoral Stem

LIGHT WEIGHT FEMORAL STEM OPTIMIZATION BASED ON DESIGN AND MATERIALS

2011 ◽  
Vol 23 (01) ◽  
pp. 37-43
Author(s):  
Sudesh Sivarasu ◽  
Pearline Beulah ◽  
Lazar Mathew
Keyword(s):  
Stainless Steel ◽  
Cross Sections ◽  
316L Stainless Steel ◽  
Stress Shielding ◽  
Weight Ratio ◽  
Femoral Stem ◽  
Cement Mantle ◽  
The Body ◽  
Cobalt Chromium ◽  
Implant Fixation

One of the main constituents of total hip replacement (THR) is the design reconstruction of femoral stem component. The major causes of the debonding of the stem–bone interfaces include the aseptic loosening of the femoral stem, dislocation, wear, fatigue, micromotions, design factors, and certain biological responses generated due to the interaction of the implants with the body environment. The usage of cemented stems result in the generation of the high cement mantle stresses thereby results in the loosening of the implants. The porous stems developed by various manufactures are of solid stems with indentations, with collars, collarless, tapered stems; tear dropped polished stems without indentations offer greater rigidity, results in the transfer less load proximally, which results in greater stress shielding of the proximal femur. Stress shielding is found to be the major cause for the failure of the hip implants and revision surgeries. A stem of low stiffness alone would not suffice in achieving a reduced or optimal stress shielding. The biomaterials such as 316L stainless steel (SS), cobalt–chromium alloys (CoCrMo) , and titanium alloys (Ti–6Al–4V) used in THRs provide high strength to weight ratio and have an excellent biocompatibility. Skeletal femoral stems with varying cross sections were designed. The materials used for the design were 316L stainless steel and Ti–6Al–4V . The femoral stem with hexagonal cross section was optimized based on the design that has low weight and better load-bearing capacity. This novel design would ameliorate the implant fixation, aid in optimal rigidity, enhance the medullary revascularization, and offer better motility to the patient.

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