Multi-axis assembled anti-infective semi-pelvis false body

Abstract

A multiaxial combined and matched type anti-infection semi-pelvic false body comprises an acetabulum and net cup plate wing which is arranged on the top of the acetabulum and can be fixed on a reserved hip bone wing. Two to three universal joints are arranged on the back of the net cup plate wing. The universal joints are opened with a card slot which can be connected with a universal bar. The invention can arbitrarily adjust the height and the point of view of the acetabulum through the combination of the universal joints and the acetabulum to realize the truly anatomical location reconstruction of the hip joint which is not affected by the resection range. The reconstruction of the connection of the pelvic ring and the acetabulum takes the way of universal multi-axis in order to conveniently adjust the location of the acetabulum, thereby assuring the coherence of the limb length after being reconstructed. The location of the acetabulum can be adjusted according to the removal situation of the soft tissue in the operation. Through the sacrum and the contact point of the universal screw of the ischiopubic multi-axis point driven into the pelvic ring, especially multi-nail fixationdriven into the lumbar, the hardening stress can be scattered, the hardening stress concentration can be reduced to reduce the complicating disease such as looseness and broken nails.

Description

technical field [0001] The invention belongs to the field of medicine, and in particular relates to a multi-axial assembled anti-infection half pelvic prosthesis. Background technique [0002] After resection of primary or metastatic tumors around the acetabulum, it is necessary to reconstruct the stability of the pelvic ring and the function of the hip joint. Without reconstruction the patient is unable to walk independently and is left with deformities and shortened limbs. Reconstructive surgery of the pelvis is complex and difficult. Restoring the anatomy of the hip, maintaining the length of the limbs, and preserving muscle function require more time and wisdom than reconstruction in other anatomical parts (Apffelstaedt JP, Zhang PJ, Driscoll DL, Karakousis CP. Various types of hemipelvetomy for softtissue sarcomas : complications, survival and prognostic factors. Surg Oncol. 1995 Aug; 4(4): 217-22.; Campanacci M, Capanna R. Pelvic resections: the Rizzoli Institute exp...

AI Technical Summary

Problems solved by technology

[0021] Problem 1: Infection

[0023] Problem 2: Loss of stability of the reconstructed pelvic ring (prosthesis fracture and loosening, prosthesis displacement, allograft bone fracture and nonunion, etc.)

[0025] Problem 3: The problem of joint stability needs to be solved

The occurrence of dislocation mainly involves two aspects: one is the dynamic instability of the hip joint caused by tumor resection involving more soft tissues; the structural instability of the hip joint is caused by the difference in acetabular design and placement during reconstruction.

[0027] Problem 4: MSTS Score Needs Improvement

[0029] Problem 5: Complexity of reconstruction operation (design and installation of prosthesis; structural reconstruction of allograft bone; unpredictability of tumor resection)

However, it falls short in restoring stability to the pelvic ring, with no real intrinsic stability between the acetabular component and the reconstructed pelvic ring

In addition, prevention of deep infection has not been characterized

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