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Acetabular - Springer Nature

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Last Updated: 10 December 2022

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Ischial screw fixation can prevent cup migration in 3D-printed custom acetabular components for complex hip reconstruction

Introduction Custom acetabular components have emerged as a standard method of treating massive acetabular bone defects in hip arthroplasty. Ischial screw fixation has been shown to increase mechanical stability for non-custom, revision arthroplasty cup fixation. Methods Electronic patient records were used to identify a new series of 49 custom implants in 46 patients from 2016 to 2022 in a unit specializing in complex joint reconstruction. On a flange of a custom cup, IF was defined as a minimum of one screw inserting into the ischium passing through a hole in a hole. Conclusions No ischial fixation has been attributed to a higher risk of cup migration than cup migration. P = 0. 0016, but not with displacement. Cup migration was linked to an elevated risk for all cause revisions including 4/8 vs. 3/38, X 2 = 9. 96, P = 0. 0016, but not with dislocation.

Source link: https://doi.org/10.1186/s42836-022-00154-3


Accuracy of acetabular cup placement during anterolateral supine total hip arthroplasty using intraoperative fluoroscopy: a retrospective study

This research was designed to investigate and report the accuracy of acetabular cup placement in ALS-THA using intraoperative fluoroscopy. Methods A total of 142 patients with 154 joints underwent ALS-THA with intraoperative fluoroscopy at the same hospital. According to individual postural shifts, the target angle of the cup position was set at 40-u00b0 for radiographic inclination and 5u00b0 for radiographic anteversion based on the functional pelvic plane. The target angle of the RA was 171 m2 (u00b0) and the postoperative RA was 20. 6 u00b0, according to U00b0, u00b0 3. 6. u00b0, and the postoperative RA was 20. 6 u00b0 3. 7 u00b0. For RI, 3. 6 u00b0 0. 3 0u00b0 0. 3 u00b0 for RA, and 4. 2 u00b0 for RA were the absolute values of the error from the target angle. Conclusions The accuracy of cup positioning in ALS-THA using intraoperative fluoroscopy was excellent and appeared to be similar to that of various navigation devices.

Source link: https://doi.org/10.1186/s13018-022-03422-9


Can the intra-operative measurement of the diameter of the femoral head help surgeons to choose the best size of the acetabular cup?

Purpose We hypothesized that the femoral head's intraoperative measurement could improve the acetabular cup size selection in total hip arthroplasty. The purpose of this clinical study was to determine the relationship between the estimated cup size from intra-operative femoral head analysis and the pre-operative templated cup size. In 77 cases, the pre-operative planned size cup accurately predicted the implanted cup or differed in only one size. Conclusion The intraoperative femoral head measurement is a simple and accurate way to assist the surgeons in selecting the right size of the acetabular cup, and is as reliable as the pre-operative templating in order to prevent cup oversizing in THA. If the cup reamer is > 4 mm less than the native head's posterioru2013posterior diameter, the greatest caution is warranted.

Source link: https://doi.org/10.1007/s00264-022-05526-7


Polyethylene liner cementation into a well-fixed metal acetabular shell for the management of periacetabular osteolysis: a systematic review

However, no systematic study has been published on this topic to date, although various papers have outlined the clinical results of cup retention with the introduction of a new liner and bone graft in the management of well-fixed cups with polyethylene wear and periacetabular osteolysis after total hip osteolysis following total hip arthroplasty. Almost all reported lesions treated with bone grafts were or didn't progress 97%. Conclusion Conclusions: Persequent bone grafting as a treatment of periacetabular osteolysis in well-fixed cups with a malfunctioned locking mechanism or no replacement liner. The clinical results of liner cementation in well-fixed cups with periacetabular osteolysis are determined by higher quality studies to see if the use of highly cross-linked polyethylene, highly porous-coated cups, hydroxyapatite-coated cups, and small-diameter cups influence the clinical results of liner cementation in periacetabular osteolysis.

Source link: https://doi.org/10.1007/s00590-021-03130-w


Rotational abnormalities in dysplastic hips and how to predict acetabular torsion

Objectives The aim of this report was to determine how conventional radiography might represent the acetabular and femoral rotational alignment profile of dysplastic and borderline-dysplastic hips. Conclusions In general analysis between the anteversion of the acetabulum and the hip lateralization index, as well as the acetabular index angle with a median of 11. 50, there were significant correlations found. Conclusion Although the femoral and acetabular torsion cannot be predicted from x-rays, the anteversion of the acetabulum correlates with the acetabular index angle, the hip lateralization index, and eventually the beta angle in dysplastic hips, the x-rays cannot be determined. U2022 This is the first study to establish significant correlations between the anteversion of the acetabulum and the hip lateralization index, as well as the acetabular inclination angle. It's also the first study to determine the acetabulum's torsion with plain radiography in dysplastic hips.

Source link: https://doi.org/10.1007/s00330-022-08895-0


The “true” acetabular anteversion angle (AV angle): 2D CT versus 3D model

We've established a u201ctrueu201d anteversion angle in the 3D's physiological location of the pelvis, attracting the largest European population compared to our records, with the largest European population measured to our knowledge. We compared the results of our AV angle 3D procedure to cross-sectional cuts of the same acetabula. Conclusions Overall, the mean AV angle was 16. 1 u00b0 as measured with the 3D device and 22. 0 u00b0 as measured with the 2D method. The AV angle in females was significantly higher in female than in male individuals if measured with both the 3D and the 2D system. The AV angle estimation in the 2D method was influenced by the pelvic tilt. Conclusion In a 3D model that is not influenced by patient positioning or pelvic tilt, we recommend a more accurate method for measuring the AV angle of the acetabulum. The 3D test should be the gold standard for measuring acetabular anteversion.

Source link: https://doi.org/10.1007/s11548-022-02717-w


The relation between surgical approaches for pelvic ring and acetabular fractures and postoperative complications: a systematic review

Introduction Although many journals discuss complications after pelvic ring and acetabular fracture surgery, a general overview of complication rates and potential risk factors is lacking. The new research provides a complete summary of the problems related to pelvic ring and acetabular fracture surgery in relation to the surgical approach. The average complication rates reported for the included surgical procedures were: 27% for the Stoppa procedure, 11% for percutaneous fixation, 5% for the Kocheru2013Langenbeck strategy, 7% for the ilioinguinal approach, and 31% for external fixation. Two research reported on risk factors and identified concomitant traumatic injuries, prolonged ICU stay, and high body mass index as risk factors for SSI. Conclusion External fixation of pelvic fractures is associated with the highest risk of SSIu2019s and neurological disorders. Although post-operative complications are common after pelvic fracture surgery, pelvic fracture surgery is often reported, more studies are required to determine potential risk factors.

Source link: https://doi.org/10.1007/s00068-022-02118-3


The placement of percutaneous retrograde acetabular posterior column screw based on imaging anatomical study of acetabular posterior column corridor

Methods of Computed tomography 100 normal adult pelvices were obtained and pelvis three-dimensional reconstruction was done by using Mimics devices, and the 3D model was imported into Geomagic Studio software. The maximum screw diameter, entry point, orientation, and exit point were measured for the transverse section of an acetabular posterior column corridor. The distances between the exit point and the real pelvis rim were mm and mm in males, respectively, according to the ipsilateral anterior sacroiliac joint line. Males had lateral inclination u00b0 in males, and females had lateral inclination u00b0. The angle between the screw and the coronal plane in males was anterior inclination u00b0 in males, but not in females u00b0 in females. Retrograde acetabular posterior column fractures that were not 4 cm above the femoral head center can be fixed by ischial tuberosity. The iliac oblique 60b0, iliac oblique 60 000b0, and oblique 60 u00b0 views were among intraoperative optimal fluoroscopic views to determine if the screw was safely introduced. The entry point for the retrograde acetabular posterior column screw is located on the midline between the ischial tuberosity's medial and lateral edges, which is 1. 3 cm far from the distal tuberosity's distal tubular tuberosity's distal tuberosity's distal ischial tuberosity's distal tuberosity's distal tuberosity. About ten percent lateral inclination and 1500b0 anterior inclination, which will fix the acetabular posterior column fractures that were not 4 cm above the femoral head center.

Source link: https://doi.org/10.1186/s13018-022-03347-3

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions