Posterior drawer after olecranization of the patella in posterior cruciate-injured knees: A cadaver study

AbstractImpairment of Eustachian tube function with nonsufficient ventilation of the middle ear is a main cause for chronic otitis media. To provide an effective and safe therapy, the innovative concept of Eustachian tube stenting was established. Biodegradable polymeric stents are developed to restore impaired tube function and dissolve after fulfilling their supportive purpose. To evaluate the applicability of the stents in the Eustachian tube, prototypes in conjunction with corresponding implantation instruments were tested in human cadaver studies. Radiopaque markers and a diaphanoscopic approach were tested as additional features to prove correct positioning of catheter and stent in the tube. In the current study biodegradable polymeric stents were implanted in the Eustachian tube of human cadavers without difficulty. Correct positioning of the stents in the tube was proved by diaphanoscopy during intervention and postoperative tomographic and histological analyses. Once designs are optimized on the basis of cadaver studies, preclinical safety and efficacy studies using animal models will be initiated.

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The Effect of Flexor Digitorum Profundus Dynamic Tenodesis on the Distal Interphalangeal Joint: A Cadaver Study

Journal of Hand Surgery Global Online ◽

10.1016/j.jhsg.2020.08.007 ◽

2020 ◽

Vol 2 (6) ◽

pp. 359-362

Author(s):

Tomoyo Akasaka ◽

Yusuke Matsuura ◽

Kazuki Kuniyoshi ◽

Takane Suzuki ◽

Seiji Ohtori

Keyword(s):

Cadaver Study ◽

Interphalangeal Joint ◽

Flexor Digitorum Profundus ◽

Distal Interphalangeal Joint ◽

Distal Interphalangeal ◽

Flexor Digitorum

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Trans-obturator cable fixation of open book pelvic injuries

Scientific Reports ◽

10.1038/s41598-021-92755-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Martin C. Jordan ◽

Veronika Jäckle ◽

Sebastian Scheidt ◽

Fabian Gilbert ◽

Stefanie Hölscher-Doht ◽

...

Keyword(s):

Pelvic Ring ◽

Testing Machine ◽

Biomechanical Testing ◽

Pubic Symphysis ◽

Cadaver Study ◽

Steel Cable ◽

Reliable Technique ◽

Peak Displacement ◽

Total Displacement ◽

Cable Fixation

AbstractOperative treatment of ruptured pubic symphysis by plating is often accompanied by complications. Trans-obturator cable fixation might be a more reliable technique; however, have not yet been tested for stabilization of ruptured pubic symphysis. This study compares symphyseal trans-obturator cable fixation versus plating through biomechanical testing and evaluates safety in a cadaver experiment. APC type II injuries were generated in synthetic pelvic models and subsequently separated into three different groups. The anterior pelvic ring was fixed using a four-hole steel plate in Group A, a stainless steel cable in Group B, and a titan band in Group C. Biomechanical testing was conducted by a single-leg-stance model using a material testing machine under physiological load levels. A cadaver study was carried out to analyze the trans-obturator surgical approach. Peak-to-peak displacement, total displacement, plastic deformation and stiffness revealed a tendency for higher stability for trans-obturator cable/band fixation but no statistical difference to plating was detected. The cadaver study revealed a safe zone for cable passage with sufficient distance to the obturator canal. Trans-obturator cable fixation has the potential to become an alternative for symphyseal fixation with less complications.

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Comparison of simulated key pinch after three surgical procedures for trapeziometacarpal osteoarthritis: a cadaver study

Journal of Hand Surgery (European Volume) ◽

10.1177/17531934211015915 ◽

2021 ◽

pp. 175319342110159

Author(s):

Lionel Athlani ◽

Damien Motte ◽

Marie Martel ◽

Florent Moissenet ◽

Julie Mottet ◽

...

Keyword(s):

Surgical Procedures ◽

Total Joint Arthroplasty ◽

Ligament Reconstruction ◽

Cadaver Study ◽

Joint Arthroplasty ◽

Pinch Force ◽

Trapeziometacarpal Osteoarthritis ◽

Intact Sample ◽

Significant Difference ◽

Tendon Interposition

We performed a cadaver study using 18 fresh-frozen adult forearms and hands to compare the tendon loads required to generate progressively greater key pinch (0.5 kg to 2 kg) after three different surgical procedures to treat trapeziometacarpal osteoarthritis: isolated trapeziectomy, trapeziectomy followed by ligament reconstruction with tendon interposition and total joint arthroplasty using a Touch® implant. Thumb pinch was simulated by loading the main actuator tendons involved in the key pinch. Six specimens were randomly assigned to each of the three surgical procedure groups. Measurements were made before and after the joint surgery. Specimens that underwent trapeziectomy with or without ligament reconstruction with tendon interposition required significantly higher tendon loads than those with the implant to achieve the same pinch force. There was no significant difference between the isolated trapeziectomy and ligament reconstruction groups. Using the implant resulted in similar median tendon loads compared with those of the intact sample. Total joint arthroplasty with a Touch® prosthesis may yield a superior biomechanical profile in which the tendon loads needed to achieve a certain key pinch force are lower and better distributed between the actuator muscles compared with trapeziectomy with or without ligament reconstruction.

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