scholarly journals The Effect of Bottom Profile Dimples on the Femoral Head on Wear in Metal-on-Metal Total Hip Arthroplasty

2021 ◽  
Vol 12 (2) ◽  
pp. 38
Author(s):  
J. Jamari ◽  
Muhammad Imam Ammarullah ◽  
Amir Putra Md Saad ◽  
Ardiyansyah Syahrom ◽  
Mohammad Uddin ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Contact Pressure ◽  
Hip Arthroplasty ◽  
Surface Texturing ◽  
Linear Wear ◽  
Daily Routine ◽  
Textured Surface ◽  
Acetabular Cup ◽  
Total Hip

Wear and wear-induced debris is a significant factor in causing failure in implants. Reducing contact pressure by using a textured surface between the femoral head and acetabular cup is crucial to improving the implant’s life. This study presented the effect of surface texturing as dimples on the wear evolution of total hip arthroplasty. It was implemented by developing finite element analysis from the prediction model without dimples and with bottom profile dimples of flat, drill, and ball types. Simulations were carried out by performing 3D physiological loading of the hip joint under normal walking conditions. A geometry update was initiated based on the patient’s daily routine activities. Our results showed that the addition of dimples reduced contact pressure and wear. The bottom profile dimples of the ball type had the best ability to reduce wear relative to the other types, reducing cumulative linear wear by 24.3% and cumulative volumetric wear by 31% compared to no dimples. The findings demonstrated that surface texturing with appropriate dimple bottom geometry on a bearing surface is able to extend the lifetime of hip implants.

Total Hip Arthroplasty in a Patient Affected by Post-Traumatic Acetabular Non-Union: Case Report and Review of the Literature

2008 ◽  
Vol 18 (4) ◽  
pp. 324-328 ◽  
Author(s):  
E. Tassinari ◽  
A. Sudanese ◽  
F. Traina ◽  
M. De Fine ◽  
A. Toni
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Preoperative Planning ◽  
Acetabular Cup ◽  
Non Union ◽  
Total Hip ◽  
Post Traumatic ◽  
One Year

Total hip arthroplasty in the presence of acetabular non-union can be demanding. The irregular anatomy, the defect, and the presence of fibrous and necrotic tissue can hamper insertion of the acetabular component. We present a case of total hip arthroplasty in a patient with post-traumatic necrosis of the femoral head and non-union of the acetabulum and follow-up one year after the operation. Following accurate preoperative planning, removal of the pseudarthrosis material, and the use of the femoral head as an autograft, it was possible to insert the acetabular cup satisfactorily in a single-stage procedure.

Epidemiological Study of Femoral Head Osteonecrosis

2017 ◽  
Vol 68 (5) ◽  
pp. 974-976
Author(s):  
Alexandru Patrascu ◽  
Liliana Savin ◽  
Dan Mihailescu ◽  
Victor Grigorescu ◽  
carmen Grierosu ◽  
...  
Keyword(s):  
Risk Factors ◽  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Young Patients ◽  
Head Group ◽  
Bipolar Hemiarthroplasty ◽  
Aseptic Necrosis ◽  
Total Hip ◽  
Femoral Head Osteonecrosis

In recent years, there has been an increase in the number of studies on the etiology of femoral head necrosis. We retrospectively reviewed all patients diagnosed with aseptic necrosis of the femoral in the period of 2010-2015. We recorded a total of 230 cases diagnosed with aseptic necrosis of the femoral head, group was composed of 65.7% men and 34.3% women, risk factors identified was 19.13% (post-traumatic), 13.91% (glucocorticoids), 26.52% (alcohol), 3.47% (another cause) and in 36 95% of the cases no risk factors were found. The results of the study based on the type of surgery performed on the basis of stages of disease progression, 8 patients (3.48%) benefited from osteotomy, 28 patients (12.17%) benefited of bipolar hemiarthroplasty prosthesis and 188 patients (81.74%) benefited of total hip arthroplasty. Osteonecrosis of the femoral head is characteristic to young patients between the age of 30-50 years old. Predisposing factors, alcohol and corticosteroid therapy remains an important cause of the disease. Total hip arthroplasty remains the best option for the patients with osteonecrosis of the femoral head.

scholarly journals A Novel Measurement Using Digital Radiography to Minimize Fluoroscopy in Total Hip Arthroplasty

2021 ◽  
Author(s):  
Andrew G. Yun ◽  
Marilena Qutami ◽  
Kory B. Dylan Pasko
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Radiation Exposure ◽  
Hip Arthroplasty ◽  
Fluoroscopy Time ◽  
Lesser Trochanter ◽  
Total Hip ◽  
Preoperative Templating ◽  
The Mean ◽  
Templating Technique

AbstractPreoperative templating for total hip arthroplasty (THA) is fraught with uncertainty. Specifically, the conventional measurement of the lesser trochanter to the center (LTC) of the femoral head used in preoperative planning is easily measured on a template but not measurable intraoperatively. The purpose of this study was to examine the utility of a novel measurement that is reproducible both on templating and in surgery as a more accurate and practical guide. We retrospectively reviewed 201 patients with a history of osteoarthritis who underwent primary THA. For preoperative templating, the distance from the top of the lesser trochanter to the equator (LeTE) of the femoral head was measured on a calibrated digital radiograph with a neutral pelvis. This measurement was used intraoperatively to guide the choice of the trial neck and head. As with any templating technique, the goal was to construct a stable, impingement-free THA with equivalent leg lengths and hip offset. In evaluating this novel templating technique, the primary outcomes measured were the number of trial reductions and the amount of fluoroscopic time, exposures, and radiation required to obtain a balanced THA reconstruction. Using the LeTE measurement, the mean number of trial reductions was 1.21, the mean number of intraoperative fluoroscopy images taken was 2.63, the mean dose of radiation exposure from fluoroscopy was 0.02 mGy, and the mean fluoroscopy time per procedure was 0.6 seconds. In hips templated with the conventional LTC prior to the LeTE, the mean fluoroscopy time was 0.9 seconds. There was a statistically significant difference in fluoroscopy time (p < 0.001). The LeTE is a reproducible measurement that transfers reliably from digital templating to surgery. This novel preoperative templating metric reduces the fluoroscopy time and consequent radiation exposure to the surgical team and may minimize the number of trial reductions.

CT-based automated planning of acetabular cup for total hip arthroplasty (THA) based on hybrid use of two statistical atlases

2016 ◽  
Vol 11 (12) ◽  
pp. 2253-2271 ◽  
Author(s):  
Yoshiyuki Kagiyama ◽  
Itaru Otomaru ◽  
Masaki Takao ◽  
Nobuhiko Sugano ◽  
Masahiko Nakamoto ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Automated Planning ◽  
Acetabular Cup ◽  
Total Hip

Assessment of an Orthopaedic Templating Software Package for Uncemented Total Hip Arthroplasty

2020 ◽  
Vol 4 (04) ◽  
pp. 155-157
Author(s):  
Michael Newman ◽  
David Hartwright
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Acetabular Cup ◽  
Total Hip ◽  
Pelvic Radiograph ◽  
Uncemented Total Hip Arthroplasty ◽  
Femoral Stems ◽  
Hip Arthroplasties ◽  
Acetabular Components ◽  
Insight Into

AbstractThe aim of this study was to assess a large, single-surgeon dataset of uncemented total hip arthroplasties that had been templated using software. This assessment compared preoperative templated predictions with what was implanted with regard to (1) femoral prosthesis size and (2) acetabular cup size. The operation notes for two types of uncemented total hip arthroplasty performed by a single surgeon between January 9, 2008, and March 21, 2019, were assessed. The data were refined so that only those that were fully templated on a correctly calibrated pelvic radiograph were included. This provided a total of 153 cases. The predicted software template was compared with actual implanted component sizes. With regard to the femoral stems, the templating software was exactly correct in 45.75% of cases and was accurate to within one size in 87.59% of cases. With regard to the acetabular component, the templating software was exactly correct in 52.94% of cases and was accurate to within one size (2 mm) in 86.94% of cases. Templating software offers an accurate prediction of the size of uncemented femoral and acetabular components. In addition, the benefits of templating include cognitive rehearsal, insight into potentially challenging aspects of surgery, and highlighting intraoperative issues where there is a large intraoperative deviation from what is templated. This study demonstrates the congruence and reproducibility of templating software when compared with other smaller studies performed in the literature.

scholarly journals Outcomes of total hip arthroplasty in patients with osteonecrosis of the femoral head—a current review

2015 ◽  
Vol 8 (3) ◽  
pp. 246-251 ◽  
Author(s):  
Todd P. Pierce ◽  
Randa K. Elmallah ◽  
Julio J. Jauregui ◽  
Daniel F. Verna ◽  
Michael A. Mont
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Current Review ◽  
A Current

Comparison of Polyethylene Wear between Highly Crosslinked and Annealed UHMWPE and Conventional UHMWPE against Ceramic Heads in Total Hip Arthroplasty

2012 ◽  
Vol 529-530 ◽  
pp. 279-284 ◽  
Author(s):  
Taishi Sato ◽  
Yasuharu Nakashima ◽  
Mio Akiyama ◽  
Takuaki Yamamoto ◽  
Taro Mawatari ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Polyethylene Wear ◽  
Wear Rates ◽  
Head Penetration ◽  
Total Hip ◽  
Patient Demographics ◽  
Ceramic Femoral Head ◽  
Implantation Period

The purpose of this study was to examine the effects of ceramic femoral head material on the wear of annealed, crosslinked ultra-high molecular weight polyethylene (UHMWPE) (XLPE) in total hip arthroplasty compared to non-crosslinked conventional UHMWPE (CPE). XLPE was fabricated by crosslinking with 60 kGy irradiation and annealing. Femoral heads made from zirconia and alumina ceramics, and cobalt-chrome (CoCr) of 22 mm or 26 mm diameter were used. In this study, the femoral head penetration into the cup was measured digitally on radiographs of 70 hips with XLPE and 50 hips with CPE. The average follow-up periods were 6.1 and 12.7 years, respectively. The steady wear rate of XLPE was significantly lower than those of CPE (0.002 versus 0.08 mm/year, respectively). Zirconia displayed increased wear rates compared to alumina in CPE; however, there was no difference among head materials in XLPE (0.0028, 0.011 and 0.009 mm/year for zirconia, alumina and CoCr, respectively). Neither head size or implantation period impacted XLPE wear. In contrast to CPE, XLPE displayed low wear rates surpassing the effects of varying femoral head material, size, implantation period and patient demographics.

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