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Acetabular - Europe PMC

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Last Updated: 10 November 2022

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Numerical Evaluations of an Uncemented Acetabular Component in Total Hip Arthroplasty: Effects of Loading and Interface Conditions.

The study was conducted using finite element models of intact and implanted hemipelvises in order to determine the effects of musculoskeletal loading and implant-bone interface conditions on preclinical evaluation of uncemented acetabular component after total hip arthroplasty. Based on a previously validated Gait2392 model, a new musculoskeletal loading dataset was created for a pelvic bone that corresponds to daily activities of sitting up-down, stairs up-down, and normal walking. During sitting up work, Strain shielding in periprosthetic cancellous bone was higher for bonded condition, relative to other combinations of interface and loading conditions. Only the nodes around the acetabular rim were prone to interfacial debonding. For all interface conditions, Bone apposition was predominant around the acetabular rim, relative to the dome. For bonded conditions, Periprosthetic bone resorption of 10% and bone apposition of 10-15% were predicted. Whereas for press-fit, the most notable bone apposition of 200-30 percent was found.

Source link: https://europepmc.org/article/MED/36149021


Image-based robotic-assisted total hip arthroplasty through direct anterior approach allows a better orientation of the acetabular cup and a better restitution of the centre of rotation than a conventional procedure.

The aim was to investigate the contribution of robotics-assisted total hip arthroplasty through a direct anterior approach in improving radiographic precision, clinical efficiency, and complications. This retrospective review compared 100 primary conventional THA to 50 percent primary robotic THA by DAA. Outliers were defined as medial displacement of the COR > 5 mm, vertical displacement of the COR > 3 mm superiorly, and vertical displacement of the COR > 3 mm superiorly. At one year of follow-up, Harris' hip score and complications were compared. With 98% in the global SZ compared to 68% in the cTHA group, the robotic cups were more oriented. In both the horizontal and vertical planes, the COR was on average better restored in the robotic company. At one year, there was no significant difference between HHS and complication rates. DAA's use of robotics for THA provided an advantage in determining the cup's orientation and the restoration of its rotation center.

Source link: https://europepmc.org/article/MED/36348089


Morphometric analysis of patient-specific 3D-printed acetabular cups: a comparative study of commercially available implants from 6 manufacturers.

Detailed information is provided by 3D printed patient-specific titanium acetabular cups are used to treat patients with severe acetabular abnormalities. In addition, we determined the surface area of each component to determine how much titanium will come into contact with patient tissue. Conclusions We found a variation in terms of the thickness of the struts from 0. 28 to 1. 65 mm, how thin the porous layers are 0. 57 to 1. 87 mm, and porosity 34 to 85 percent. One manufacturer printed structures with different porosities between the body and flange; another manufacturer had two separate porous regions within the cup's body. Conclusions There is a lot of variation among manufacturers of the porous titanium structures that they 3D print.

Source link: https://europepmc.org/article/MED/36342573


A new accelerometer-based portable navigation system provides high accuracy of acetabular cup placement in total hip arthroplasty in both the lateral decubitus and supine positions.

Introduction To the supine and lateral decubitus positions with the same portable navigation device, no studies have compared the results of acetabular cup placement in total hip arthroplasty in total hip arthroplasty. The most notable result was absolute errors of cup placement angles, defined as the absolute values of cup inclination and anteversion angles displayed on the navigation system and those measured on postoperative computed tomography images. Conclusion This latest accelerometer-based portable navigation device may have a great deal of accuracy in THA measurements in the lateral decubitus and supine positions.

Source link: https://europepmc.org/article/MED/36322198


Combined Borderline Acetabular Dysplasia and Increased Femoral Anteversion is Associated with Worse Outcomes in Female Patients Undergoing Hip Arthroscopy for Femoroacetabular Impingement.

In a female cohort of patients, the aim of this study is to investigate the effects of increased femoral anteversion and borderline acetabular dysplasia. Methods This is a retrospective review of female patients in FAI with hip arthroscopy. At a two-to-four-year follow-up, there were 243 female patients included in the cohort that received iHOT12 scores at two-to-four years. Females with combined LCEA216425 degrees and Femoral anteversion of over 20 degrees were less likely to achieve a normal hip, MCID, SCB, or PASS, and were more likely to have an abnormal hip. Patients with an LCEA216425 degrees and a normal femoral version were less likely to have a normal hip, SCB, and PASS than those with normal acetabular coverage. Femoral anteversion over 20 degrees and borderline acetabular dysplasia were both dissatisfied with the treatment after hip osteoarthroscopy.

Source link: https://europepmc.org/article/MED/36332854


Model-Based Acetabular Cup Orientation Optimization Based on Minimizing the Risk of Edge-Loading and Implant Impingement Following Total Hip Arthroplasty.

A computationally cost-effective model-based strategy for determining patient-specific optimal acetabular cup alignment for total hip arthroplasty is presented in this paper. A musculoskeletal model calculates the hip contact force and the relative orientation of the femur and pelvis by using motion capture data from the patient's daily activities. The optimal cup alignment is then determined by three optimization criteria, including a tradeoff between the risk of impingement and edge loading. The findings show that patient-specific characteristics, such as pelvic tilt, could greatly influence the optimal cup alignment, especially the value of cup anteversion. According to those situations, the well-known Lewinnek safe zone may not be optimal or even safe. Unlike other advanced model-based techniques, the need for force plate measurements is reduced in this study by estimating the ground reaction forces and moments, which makes this method more convenient and cost-effective.

Source link: https://europepmc.org/article/MED/35748611


Risk Factors for Deep Infection and Conversion Total Hip Arthroplasty After Operative Combined Pelvic Ring and Acetabular Fractures.

After surgical treatment of combined pelvic ring and acetabular injuries, it was difficult to determine risk factors for deep infection and conversion to total hip arthroplasty. Patients and treatment Our team investigated 150 surgical combined pelvic and acetabular injuries at our hospital from 2010 to 2019, with an average follow-up of 690 days. Patients with deep infection had higher incidences of hip dislocation, intraoperative transfusion, elevated body mass index, increased estimated blood loss, more intraoperative units transfused, and longer operating times. Patients requiring conversion THA were older and had higher rates of transverse posterior wall fracture pattern, posterior wall involvement, hip dislocation, and increased estimated blood loss in patients requiring conversion THA. In these patients, higher average BMI and number of intraoperative units of blood transfused were independently linked to deep infection, while posterior wall involvement was unquestionably associated with THA conversion in these patients.

Source link: https://europepmc.org/article/MED/35605104


Development of acetabular retroversion in LCPD hips-an observational radiographic study from early stage to healing.

Methods In a retrospective, observational study, we investigated pelvic radiographs in children with LCPD at the time of occurrence of acetabular retroversion and estimated predictive factors for retroversion. In stage II and III compared to stage I and IV, a more retroverted acetabulum was discovered in stage II and III. In hips of the contralateral side of the LCPD without LCPD, the prevalence of acetabular retroversion was 0% in both groups. Retroversion factors included younger age at stage II and IV, the disintegration of the lateral pillar in stage II, or a non-dysplastic hip. Conclusions This is the first study to assess acetabular versions in children with LCPD from early childhood to recovery. LCPD can cause acetabular retroversion in the developing hip and early healing stage, and is most prevalent in the fragmentation and early healing stages.

Source link: https://europepmc.org/article/MED/36274080


Acetabular deficiency in borderline hip dysplasia is underestimated by lateral center edge angle alone.

When the lateral center edge angle, historically described by Wiberg, measured 18-25 feet, no one was used in hip transplant surgery, the term "borderline hip dysplasia" was used. Many radiographic measures have been used to determine the antero posterior coverage of the femoral head, including, the anterior and posterior wall index. Material and methods An retrospective review of 397 consecutive hips was conducted, all of whom were treated with triple pelvic osteotomy (onset of symptomatic hip dysplasia). AWI and PWI were measured on all preoperative pelvic radiographs with a LCEA of 18-25-u00b0, acetabular index, AWI, and PWI. The parameters' correlation between the intra- and interobserver correlations of the parameters was determined by the intraclass correlation coefficient, which was determined by the intraclass correlation coefficient. Male acetabula seemed to be marginally more postero-laterally deficient than female acetabula, according to a Gender stratification report. Male acetabula were more deficient postero-laterally than female.

Source link: https://europepmc.org/article/MED/36271941

* 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