The Experts below are selected from a list of 3735 Experts worldwide ranked by ideXlab platform

Gao Qingta - One of the best experts on this subject based on the ideXlab platform.

  • treatment of non union of femoral fracture in aged patients by transplantation of vascularized fibula into medullary cavity with ni ti shaped memory alloy of embracing Internal Fixator
    China Journal of Orthopaedics and Traumatology, 2006
    Co-Authors: Gao Qingta
    Abstract:

    Objective:To investigate the technique and outcome of the combination of vascularized fibula transplanted into medullary cavity and Ni-Ti-shaped memory alloy embracing Internal Fixator in treating aged patients with non-union of femoral fracture.Methods:Seventeen aged patients(13 male and 4 female with average age of 70.94±4.12 years) with non-union of femoral fracture were recruited,of which 12 cases had short deformity(average 3.56 cm)and 5 cases had angled deformity(average 11°).A suitable length of vascularized fibula with the cortex removed at both ends was inserted into the enlarged medullary cavity of the non-union femur.The blood vessels were anastomosed with the nearby vessels.The Ni-Ti-shaped memory alloy of embracing Internal Fixator was used.Results:The time for bone healing in 17 patients was 8 to 12 weeks(mean 9.8 weeks).No any case occurred with non-union postoperatively.All the patients exhibited a good function in walking and burdening.According to the standard for evaluating the curative effect,a excellent result was reached in 14 cases and good one in 3 cases.Conclusion:The vascularized fibula which was transplanted into medullary cavity in combination with the fixation by use of Ni-Ti-shaped memory alloy of embracing Internal Fixator can facilitate the clinical heal and functional recovery.This combined therapeutic method is an ideal approach in treating aged patients with femur non-union.

Bernd Fuechtmeier - One of the best experts on this subject based on the ideXlab platform.

  • Biomechanical analysis of a transiliac Internal Fixator
    International Orthopaedics, 2011
    Co-Authors: Thomas Dienstknecht, Arne Berner, Andreas Lenich, Johannes Zellner, Michael Mueller, Michael Nerlich, Bernd Fuechtmeier
    Abstract:

    Purpose We evaluated the biomechanical characteristics of the transiliac Internal Fixator (TIFI) as compared to two well-established methods of Internal posterior pelvic ring fixation. Methods Six freshly frozen human pelves were used for simulated single-leg stance loading of an AO type C injury model (pubic symphysis diastasis and unilateral sacroiliac joint disruption). The symphysis rupture was stabilized with a dynamic compression plate. Afterwards the three Internal stabilization systems (TIFI, iliosacral screws and ventral plate osteosynthesis) were analysed. Fragment movement was measured in a contact-free manner with a stereophotometric infrared system. Results No significant differences in the three-dimensional deformation tolerated by the TIFI as compared to the other Internal fixation systems were found. Conclusions The transiliac Internal Fixator provides the same biomechanical stability as the other reference implants tested. We suggest the use of this device as a suitable alternative to the other implants.

  • Biomechanical analysis of a transiliac Internal Fixator
    International orthopaedics, 2011
    Co-Authors: Thomas Dienstknecht, Arne Berner, Andreas Lenich, Johannes Zellner, Michael Nerlich, Michael B. Mueller, Bernd Fuechtmeier
    Abstract:

    Purpose We evaluated the biomechanical characteristics of the transiliac Internal Fixator (TIFI) as compared to two well-established methods of Internal posterior pelvic ring fixation.

Bernd Füchtmeier - One of the best experts on this subject based on the ideXlab platform.

Michael Nerlich - One of the best experts on this subject based on the ideXlab platform.

  • Transiliac Internal Fixator
    Fragility Fractures of the Pelvis, 2017
    Co-Authors: Michael Müller, Paul Schmitz, Michael Nerlich
    Abstract:

    The transiliac Internal Fixator is a posterior bridging stabilization device and an alternative to posterior bridging plate osteosynthesis and transsacral bar fixation. The principle of this technique is to insert one pedicle screw in each ilium and connect them with a transverse rod. The pedicle screws can be inserted in the cranio-caudal or in the posterior-anterior direction. In the first version, pedicle screws are inserted in the posterior ilium 1–2 cm cranial to the superior posterior iliac spine parallel to the posterior gluteal line in a cranio-caudal direction. In the second version, the screws are inserted from the superior posterior iliac spine and directed towards the anterior inferior iliac spine. Coverage of the implants by the fascia is an important factor to avoid soft tissue problems. The Internal Fixator provides angular stable fixation of the broken hemipelvis to the intact one. It is suitable for the treatment of simple unilateral osteoporotic sacral fractures in the central, transforaminal or alar region of the sacrum. The biomechanical performance was tested in a single leg stance model and showed no significant differences with three competitive options for treatment. In a prospective study including 31 patients, none of the 62 pedicle screws inserted into the ilium in a cranio-caudal direction was positioned incorrectly. There were no neuro-vascular lesions, one case of loosening of a pedicle screw and two superficial wound infections. The clinical follow-up showed a sufficient mechanical stability of the fixations in all patients despite immediate weight-bearing as tolerated. No loss of reduction or secondary dislocation occurred. Transiliac Internal fixation is a technically easy, less invasive and safe method for the fixation of unilateral fragility fractures of the sacrum.

  • Surgical solution to fragility fractures of the pelvis -- cement augmented transiliac Internal Fixator
    Chinese Journal of Orthopaedic Trauma, 2017
    Co-Authors: Paul Schmitz, Michael Nerlich, Stephan Luedeck, Bowei Wang, Rupert Schupfner, Michael Worlicek, Michael Müller
    Abstract:

    Objective To describe and analyze a new method of treating fragility fractures of the pelvis in the elderly patients, a cement augmentable "Transiliac Internal Fixator" (TIFI). Methods We reviewed 196 patients older than 59 years with a pelvic ring fracture who had been treated in the period from January 2004 through November 2014. They were 11 men and 93 women, aged from 59 to 94 years (average, 77.5±7.6 years). By the Romens classification, there were 31 cases of type Ⅰ, 39 ones of type Ⅱ, 19 ones of type Ⅲ and 15 ones of type Ⅳ. The causes for fracture included fall from standing height (89 cases), fall from a height of less than 3 meters (8 cases) and absence of a definite trauma (7 cases). Of them, 65 received conservative management and 39 surgery. TIFI was used in 17 patients in whom cannulated and per-forated Schanz screws were placed from the posterior superior iliac spine to the anterior inferior iliac spine and fixated into the supraacetabular bone canal. Results Of the 65 patients receiving conservative manage-ment, on the day of discharge, one could sit on a wheel-chair, 26 could walk, 8 could go upstairs and downstairs, and 30 were not recorded. Of the 39 patients receiving surgery, on the day of discharge, 6 could sit on a wheel-chair, 26 could walk, one could go upstairs and downstairs, and 6 were not recorded. Of the 34 patients receiving fixation with Schanz screws, the sacro-iliac joint was penetrated by the screws in 2. In the 16 patients receiving fixation with Schanz screws plus cement augmentation, no cement leakage into the sacro-iliac joint was observed. The average length of TIFI placement was 100±20 mm and the average length of connective rod 62±16 mm. Of the 17 patients receiving TIFI fixation, postoperative haematoma occurred in 2, superfical wound infection in one, and deep infection or implant infection in none. Conclusions Fragility fractures of the pelvis in the elderly patients can be treated according to their Romens classifications. The new technique, TIFI, is a minimally invasive and safe treatment for fragility fractures of the pelvis. Key words: Pelvis; Fractures, bone; Therapeutic methods; Internal Fixator; Osteoporosis

  • Biomechanical analysis of a transiliac Internal Fixator
    International Orthopaedics, 2011
    Co-Authors: Thomas Dienstknecht, Arne Berner, Andreas Lenich, Johannes Zellner, Michael Mueller, Michael Nerlich, Bernd Fuechtmeier
    Abstract:

    Purpose We evaluated the biomechanical characteristics of the transiliac Internal Fixator (TIFI) as compared to two well-established methods of Internal posterior pelvic ring fixation. Methods Six freshly frozen human pelves were used for simulated single-leg stance loading of an AO type C injury model (pubic symphysis diastasis and unilateral sacroiliac joint disruption). The symphysis rupture was stabilized with a dynamic compression plate. Afterwards the three Internal stabilization systems (TIFI, iliosacral screws and ventral plate osteosynthesis) were analysed. Fragment movement was measured in a contact-free manner with a stereophotometric infrared system. Results No significant differences in the three-dimensional deformation tolerated by the TIFI as compared to the other Internal fixation systems were found. Conclusions The transiliac Internal Fixator provides the same biomechanical stability as the other reference implants tested. We suggest the use of this device as a suitable alternative to the other implants.

  • Biomechanical analysis of a transiliac Internal Fixator
    International orthopaedics, 2011
    Co-Authors: Thomas Dienstknecht, Arne Berner, Andreas Lenich, Johannes Zellner, Michael Nerlich, Michael B. Mueller, Bernd Fuechtmeier
    Abstract:

    Purpose We evaluated the biomechanical characteristics of the transiliac Internal Fixator (TIFI) as compared to two well-established methods of Internal posterior pelvic ring fixation.

Thomas Dienstknecht - One of the best experts on this subject based on the ideXlab platform.

  • Biomechanical analysis of a transiliac Internal Fixator
    International Orthopaedics, 2011
    Co-Authors: Thomas Dienstknecht, Arne Berner, Andreas Lenich, Johannes Zellner, Michael Mueller, Michael Nerlich, Bernd Fuechtmeier
    Abstract:

    Purpose We evaluated the biomechanical characteristics of the transiliac Internal Fixator (TIFI) as compared to two well-established methods of Internal posterior pelvic ring fixation. Methods Six freshly frozen human pelves were used for simulated single-leg stance loading of an AO type C injury model (pubic symphysis diastasis and unilateral sacroiliac joint disruption). The symphysis rupture was stabilized with a dynamic compression plate. Afterwards the three Internal stabilization systems (TIFI, iliosacral screws and ventral plate osteosynthesis) were analysed. Fragment movement was measured in a contact-free manner with a stereophotometric infrared system. Results No significant differences in the three-dimensional deformation tolerated by the TIFI as compared to the other Internal fixation systems were found. Conclusions The transiliac Internal Fixator provides the same biomechanical stability as the other reference implants tested. We suggest the use of this device as a suitable alternative to the other implants.

  • Biomechanical analysis of a transiliac Internal Fixator
    International orthopaedics, 2011
    Co-Authors: Thomas Dienstknecht, Arne Berner, Andreas Lenich, Johannes Zellner, Michael Nerlich, Michael B. Mueller, Bernd Fuechtmeier
    Abstract:

    Purpose We evaluated the biomechanical characteristics of the transiliac Internal Fixator (TIFI) as compared to two well-established methods of Internal posterior pelvic ring fixation.