Finite element analysis of the pelvis after modular hemipelvic endoprosthesis reconstruction

Zhou, Yong; Li, Min; Liu, Yang; Shi, Rui; Zhang, Wenli; Zhang, Hui; Duan, Hong

doi:10.1007/s00264-012-1756-6

Cited by 31 publications

(21 citation statements)

References 30 publications

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“…In articles [3,4] variants of implant fixation in the pelvic bone are examined from biomechanical positions. In [5], a modular endoprosthesis of a customised shape and size is presented, designed to replace the destroyed half of the pelvis. The paper presents a comparative analysis of the stress distribution between a healthy and restored pelvis in three static positions: sitting, standing on two legs and standing on one leg of the injured side.…”

Section: Introductionmentioning

confidence: 99%

Finite-element study of the customized implant for revision hip replacement

Маслов¹,

Суркова²,

Maslova³

et al. 2019

Vib. proced.

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This work examines a biomechanical system consisting of the hip endoprosthesis and bones of the pelvic region of a person under a load corresponding to the equilibrium of a person in double-supported state. An assessment of the strength of a customised endoprosthesis has been carried out based on the analysis of the stress-strain state of the finite element model of the "skeleton-hip prosthesis" system when tightening the screws and when the system is subjected the person's weight; dangerous areas of the pelvic bone with high level of stresses have been identified. As recommendations, optimization of the location and number of screws used in order to create a more uniform stress distribution is proposed.

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Section: Introductionmentioning

confidence: 99%

Finite-element study of the customized implant for revision hip replacement

Маслов¹,

Суркова²,

Maslova³

et al. 2019

Vib. proced.

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“…Invasive benign tumors, such as giant cell tumor of the bone or chondroblastoma, usually require surgical treatment, because they have a progressive growth [8,23]. Regardless of the risk of fracture, these tumors are surgically removed and treated with intraoperative local adjuvant agents.…”

Section: Discussionmentioning

confidence: 99%

Timing of surgery for benign periacetabular tumor: virtual finite element analysis and clinical verification on 39 cases

Yang

Zhang

Lang

et al. 2020

Preprint

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BackgroundThe treatment of periacetabular tumor has always been met with great challenges, including the lack of a standard for the timing of surgery. The purposes of this study were to predict the risk for fracture by finite element analysis of benign periacetabular tumor; to guide the timing of operation; and to verify the practical application of this standard through clinical cases. MethodsBone defects in different areas of the acetabulum were constructed, and the fracture risk was predicted by finite element analysis. According to the results of finite element analysis and Enneking classification, the patients with benign periacetabular tumor were divided into the low fracture risk noninvasive lesion, low fracture risk invasive lesion, and high fracture risk groups. The grouping was used to guide the timing of operation. ResultsThis study included 39 patients who were followed-up for at least two years to verify the effectiveness of this program. The 12 patients in the low risk noninvasive lesion group that did not undergo operation showed no obvious pathological changes and no pathological fracture; there was no significant difference in the MSTS-93 score between the first and last visits (P > 0.05). The 7 patients in the low risk invasive lesion group were treated with adjuvant therapy before the operation; the MSTS-93 score was significantly lower on the first visit than on the last visit (P < 0.05). The 20 cases that had high risk for fracture underwent surgery after the diagnosis; of these, 13 patients achieved osseointegration of the graft bone and 7 patients had no prosthesis loosening, detachment, displacement or rupture after prosthesis replacement. The MSTS-93 score significantly improved from a preoperative value of 19.61 ± 7.32 to a final follow-up value of 26.28 ± 15.59 (P < 0.01). ConclusionsOur study confirmed that for benign periacetabular tumor, finite element analysis, combined with the nature of the tumor, can predict the risk for acetabular fracture and guide the appropriate timing and method of operation, thereby, enabling a safe therapeutic effect.

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“…By these two arches, the load is transferred from the acetabulum to the sacroiliac joint and to the pubic symphysis [19]. Therefore, the arcuate line has become a focal point in stress concentration, which was the same as the pelvic stress nephogram analyzed by 3D finite element method [13]. Finally, two testing sites at both arcuate lines were selected in out testing.…”

Section: Discussionmentioning

confidence: 99%

The Strain at Bone-Implant Interface Determines the Effect of Spinopelvic Reconstruction following Total Sacrectomy: A Strain Gauge Analysis in Various Spinopelvic Constructs

Zhu

Zeng

et al. 2014

PLoS ONE

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PurposeThere is still some controversy regarding the optimal biomechanical concept for spinopelvic stabilization following total sacrectomy for malignancy. Strains at specific anatomical sites at pelvis/sacrum and implants interfaces have been poorly investigated. Herein, we compared and analyzed the strains applied at key points at the bone-implant interface in four different spinopelvic constructs following total sacrectomy; consequently, we defined a balanced architecture for spinopelvic fusion in that situation.MethodsSix human cadaveric specimens, from second lumbar vertebra to proximal femur, were used to compare the partial strains at specific sites in a total sacrectomy model. Test constructs included: (1) intact pelvis (control), (2) sacral-rod reconstruction (SRR), (3) bilateral fibular flap reconstruction (BFFR), (4) four-rods reconstruction (FRR), and (5) improved compound reconstruction (ICR). Strains were measured by bonded strain gauges onto the surface of three specific sites (pubic rami, arcuate lines, and posterior spinal rods) under a 500 N axial load.ResultsICR caused lower strains at specific sites and, moreover, on stress distribution and symmetry, compared to the other three constructs. Strains at pubic rami and arcuate lines following BFFR were lower than those following SRR, but higher at the posterior spinal rod construct. The different modes of strain distribution reflected different patient’s parameter-related conditions. FRR model showed the highest strains at all sites because of the lack of an anterior bracing frame.ConclusionsThe findings of this investigation suggest that both anterior bracing frame and the four-rods load dispersion provide significant load sharing. Additionally, these two constructs decrease the peak strains at bone-implant interface, thus determining the theoretical surgical technique to achieve optimal stress dispersion and balance for spinopelvic reconstruction in early postoperative period following total sacrectomy.

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Finite element analysis of the pelvis after modular hemipelvic endoprosthesis reconstruction

Cited by 31 publications

References 30 publications

Finite-element study of the customized implant for revision hip replacement

Finite-element study of the customized implant for revision hip replacement

Timing of surgery for benign periacetabular tumor: virtual finite element analysis and clinical verification on 39 cases

The Strain at Bone-Implant Interface Determines the Effect of Spinopelvic Reconstruction following Total Sacrectomy: A Strain Gauge Analysis in Various Spinopelvic Constructs

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