The Experts below are selected from a list of 132 Experts worldwide ranked by ideXlab platform

Chunfeng Zhao - One of the best experts on this subject based on the ideXlab platform.

  • a canine non weight bearing model with radial neurectomy for rotator cuff repair
    PLOS ONE, 2015
    Co-Authors: Nirong Bao, Peter C Amadio, Scott P Steinmann, Chunfeng Zhao
    Abstract:

    Background The major concern of using a large animal model to study rotator cuff repair is the high rate of repair retears. The purpose of this study was to test a non-weight-bearing (NWB) canine model for rotator cuff repair research. Methods First, in the in vitro study, 18 shoulders were randomized to 3 groups. 1) Full-width transections repaired with modified Mason-Allen Sutures using 3-0 polyglactin Suture, 2) Group 1 repaired using number 2 (#2) polyester braid and long-chain Polyethylene Suture, and 3) Partial-width transections leaving the superior 2 mm infraspinatus tendon intact without repair. In the in vivo study of 6 dogs, the infraspinatus tendon was partially transected as the same as the in vitro group 3. A radial neurectomy was performed to prevent weight bearing. The operated limb was slung in a custom-made jacket for 6 weeks. Results In the in vitro study, mean ultimate tensile load and stiffness in Group 2 were significantly higher than Group 1 and 3 (p<0.05). In the in vivo study, gross inspection and histology showed that the preserved superior 2-mm portion of the infraspinatus tendon remained intact with normal structure. Conclusions Based on the biomechanical and histological findings, this canine NWB model may be an appropriate and useful model for studies of rotator cuff repair.

  • A Canine Non-Weight-Bearing Model with Radial Neurectomy for Rotator Cuff Repair
    PloS one, 2015
    Co-Authors: Nirong Bao, Peter C Amadio, Scott P Steinmann, Chunfeng Zhao
    Abstract:

    Background The major concern of using a large animal model to study rotator cuff repair is the high rate of repair retears. The purpose of this study was to test a non-weight-bearing (NWB) canine model for rotator cuff repair research. Methods First, in the in vitro study, 18 shoulders were randomized to 3 groups. 1) Full-width transections repaired with modified Mason-Allen Sutures using 3-0 polyglactin Suture, 2) Group 1 repaired using number 2 (#2) polyester braid and long-chain Polyethylene Suture, and 3) Partial-width transections leaving the superior 2 mm infraspinatus tendon intact without repair. In the in vivo study of 6 dogs, the infraspinatus tendon was partially transected as the same as the in vitro group 3. A radial neurectomy was performed to prevent weight bearing. The operated limb was slung in a custom-made jacket for 6 weeks. Results In the in vitro study, mean ultimate tensile load and stiffness in Group 2 were significantly higher than Group 1 and 3 (p

  • A Canine Non-Weight-Bearing Model with Radial Neurectomy for Rotator Cuff Repair.
    Public Library of Science (PLoS), 1
    Co-Authors: Nirong Bao, Peter C Amadio, Scott P Steinmann, Chunfeng Zhao
    Abstract:

    The major concern of using a large animal model to study rotator cuff repair is the high rate of repair retears. The purpose of this study was to test a non-weight-bearing (NWB) canine model for rotator cuff repair research.First, in the in vitro study, 18 shoulders were randomized to 3 groups. 1) Full-width transections repaired with modified Mason-Allen Sutures using 3-0 polyglactin Suture, 2) Group 1 repaired using number 2 (#2) polyester braid and long-chain Polyethylene Suture, and 3) Partial-width transections leaving the superior 2 mm infraspinatus tendon intact without repair. In the in vivo study of 6 dogs, the infraspinatus tendon was partially transected as the same as the in vitro group 3. A radial neurectomy was performed to prevent weight bearing. The operated limb was slung in a custom-made jacket for 6 weeks.In the in vitro study, mean ultimate tensile load and stiffness in Group 2 were significantly higher than Group 1 and 3 (p

H M Klinger - One of the best experts on this subject based on the ideXlab platform.

  • biomechanical characteristics of single row repair in comparison to double row repair with consideration of the Suture configuration and Suture material
    Knee Surgery Sports Traumatology Arthroscopy, 2008
    Co-Authors: M H Baums, Gottfried H Buchhorn, Gunter Spahn, B Poppendieck, W Schultz, H M Klinger
    Abstract:

    The aim of the study was to evaluate the time zero mechanical properties of single- versus double-row configuration for rotator cuff repair in an animal model with consideration of the stitch technique and Suture material. Thirty-two fresh-frozen sheep shoulders were randomly assigned to four repair groups: Suture anchor single-row repair coupled with (1) braided, nonabsorbable polyester Suture sized USP No. 2 (SRAE) or (2) braided polyblend Polyethylene Suture sized No. 2 (SRAH). The double-row repair was coupled with (3) USP No. 2 (DRAE) or (4) braided polyblend Polyethylene Suture No. 2 (DRAH). Arthroscopic Mason–Allen stitches were used (single-row) and combined with medial horizontal mattress stitches (double-row). Shoulders were cyclically loaded from 10 to 180 N. Displacement to gap formation of 5- and 10-mm at the repair site, cycles to failure, and the mode of failure were determined. The ultimate tensile strength was verified in specimens that resisted to 3,000 cycles. DRAE and DRAH had a lower frequency of 5- (P = 0.135) and 10-mm gap formation (P = 0.135). All DRAE and DRAH resisted 3,000 cycles while only three SRAE and one SRAH resisted 3,000 cycles (P   0.05). Double-row Suture anchor repair with arthroscopic Mason–Allen/medial mattress stitches provides initial strength superior to single-row repair with arthroscopic Mason–Allen stitches under isometric cyclic loading as well as under ultimate loading conditions. Our results support the concept of double-row fixation with arthroscopic Mason–Allen/medial mattress stitches in rotator cuff tears with improvement of initial fixation strength and ultimate tensile load. Use of new polyblend Polyethylene Suture material seems not to increase the initial biomechanical aspects of the repair construct.

Nirong Bao - One of the best experts on this subject based on the ideXlab platform.

  • a canine non weight bearing model with radial neurectomy for rotator cuff repair
    PLOS ONE, 2015
    Co-Authors: Nirong Bao, Peter C Amadio, Scott P Steinmann, Chunfeng Zhao
    Abstract:

    Background The major concern of using a large animal model to study rotator cuff repair is the high rate of repair retears. The purpose of this study was to test a non-weight-bearing (NWB) canine model for rotator cuff repair research. Methods First, in the in vitro study, 18 shoulders were randomized to 3 groups. 1) Full-width transections repaired with modified Mason-Allen Sutures using 3-0 polyglactin Suture, 2) Group 1 repaired using number 2 (#2) polyester braid and long-chain Polyethylene Suture, and 3) Partial-width transections leaving the superior 2 mm infraspinatus tendon intact without repair. In the in vivo study of 6 dogs, the infraspinatus tendon was partially transected as the same as the in vitro group 3. A radial neurectomy was performed to prevent weight bearing. The operated limb was slung in a custom-made jacket for 6 weeks. Results In the in vitro study, mean ultimate tensile load and stiffness in Group 2 were significantly higher than Group 1 and 3 (p<0.05). In the in vivo study, gross inspection and histology showed that the preserved superior 2-mm portion of the infraspinatus tendon remained intact with normal structure. Conclusions Based on the biomechanical and histological findings, this canine NWB model may be an appropriate and useful model for studies of rotator cuff repair.

  • A Canine Non-Weight-Bearing Model with Radial Neurectomy for Rotator Cuff Repair
    PloS one, 2015
    Co-Authors: Nirong Bao, Peter C Amadio, Scott P Steinmann, Chunfeng Zhao
    Abstract:

    Background The major concern of using a large animal model to study rotator cuff repair is the high rate of repair retears. The purpose of this study was to test a non-weight-bearing (NWB) canine model for rotator cuff repair research. Methods First, in the in vitro study, 18 shoulders were randomized to 3 groups. 1) Full-width transections repaired with modified Mason-Allen Sutures using 3-0 polyglactin Suture, 2) Group 1 repaired using number 2 (#2) polyester braid and long-chain Polyethylene Suture, and 3) Partial-width transections leaving the superior 2 mm infraspinatus tendon intact without repair. In the in vivo study of 6 dogs, the infraspinatus tendon was partially transected as the same as the in vitro group 3. A radial neurectomy was performed to prevent weight bearing. The operated limb was slung in a custom-made jacket for 6 weeks. Results In the in vitro study, mean ultimate tensile load and stiffness in Group 2 were significantly higher than Group 1 and 3 (p

  • A Canine Non-Weight-Bearing Model with Radial Neurectomy for Rotator Cuff Repair.
    Public Library of Science (PLoS), 1
    Co-Authors: Nirong Bao, Peter C Amadio, Scott P Steinmann, Chunfeng Zhao
    Abstract:

    The major concern of using a large animal model to study rotator cuff repair is the high rate of repair retears. The purpose of this study was to test a non-weight-bearing (NWB) canine model for rotator cuff repair research.First, in the in vitro study, 18 shoulders were randomized to 3 groups. 1) Full-width transections repaired with modified Mason-Allen Sutures using 3-0 polyglactin Suture, 2) Group 1 repaired using number 2 (#2) polyester braid and long-chain Polyethylene Suture, and 3) Partial-width transections leaving the superior 2 mm infraspinatus tendon intact without repair. In the in vivo study of 6 dogs, the infraspinatus tendon was partially transected as the same as the in vitro group 3. A radial neurectomy was performed to prevent weight bearing. The operated limb was slung in a custom-made jacket for 6 weeks.In the in vitro study, mean ultimate tensile load and stiffness in Group 2 were significantly higher than Group 1 and 3 (p

S. Ashfaq Hasan - One of the best experts on this subject based on the ideXlab platform.

  • Os acromiale fixation: a biomechanical comparison of Polyethylene Suture versus stainless steel wire tension band.
    Journal of shoulder and elbow surgery, 2016
    Co-Authors: Brian Shiu, Xuyang Song, Abigail Iacangelo, Hyunchul Kim, Ehsan Jazini, R. Frank Henn, Mohit N. Gilotra, S. Ashfaq Hasan
    Abstract:

    Background Symptomatic hardware is a commonly reported complication after surgical fixation of an unstable meso-type os acromiale. This study compared the biomechanical properties of a cannulated screw tension band construct using a metal wire tension band vs. a Suture tension band, considering that the Suture construct could allow for decreased hardware burden in the clinical setting. Methods A meso-type os acromiale was created in 16 cadaveric shoulders. Two cannulated 4-mm screws were placed in each specimen. Tension band augmentation was accomplished with a 1-mm stainless steel wire (wire group) or a #5 braided Polyethylene Suture (Suture group), with 8 specimens in each group. An inferiorly directed force was applied to the anterior acromion at 1 mm/s on a materials testing machine. Stiffness and ultimate failure load were recorded and analyzed. Results No significant difference ( P  = .22) was observed in the ultimate failure load between the wire (228  ± 85 N; range, 114-397 N) and the Suture (275 ± 139 N; range, 112–530 N). No significant difference ( P  = .17) was observed in the stiffness between the wire (28  ± 12 N/mm; range, 18–53 N/mm) and the Suture (38  ± 25 N/mm; range, 10–83 N/mm). Conclusions Stainless steel wire and Polyethylene Suture have similar biomechanical strength in the cannulated screw tension band fixation of meso-type os acromiale at time zero.

M H Baums - One of the best experts on this subject based on the ideXlab platform.

  • biomechanical characteristics of single row repair in comparison to double row repair with consideration of the Suture configuration and Suture material
    Knee Surgery Sports Traumatology Arthroscopy, 2008
    Co-Authors: M H Baums, Gottfried H Buchhorn, Gunter Spahn, B Poppendieck, W Schultz, H M Klinger
    Abstract:

    The aim of the study was to evaluate the time zero mechanical properties of single- versus double-row configuration for rotator cuff repair in an animal model with consideration of the stitch technique and Suture material. Thirty-two fresh-frozen sheep shoulders were randomly assigned to four repair groups: Suture anchor single-row repair coupled with (1) braided, nonabsorbable polyester Suture sized USP No. 2 (SRAE) or (2) braided polyblend Polyethylene Suture sized No. 2 (SRAH). The double-row repair was coupled with (3) USP No. 2 (DRAE) or (4) braided polyblend Polyethylene Suture No. 2 (DRAH). Arthroscopic Mason–Allen stitches were used (single-row) and combined with medial horizontal mattress stitches (double-row). Shoulders were cyclically loaded from 10 to 180 N. Displacement to gap formation of 5- and 10-mm at the repair site, cycles to failure, and the mode of failure were determined. The ultimate tensile strength was verified in specimens that resisted to 3,000 cycles. DRAE and DRAH had a lower frequency of 5- (P = 0.135) and 10-mm gap formation (P = 0.135). All DRAE and DRAH resisted 3,000 cycles while only three SRAE and one SRAH resisted 3,000 cycles (P   0.05). Double-row Suture anchor repair with arthroscopic Mason–Allen/medial mattress stitches provides initial strength superior to single-row repair with arthroscopic Mason–Allen stitches under isometric cyclic loading as well as under ultimate loading conditions. Our results support the concept of double-row fixation with arthroscopic Mason–Allen/medial mattress stitches in rotator cuff tears with improvement of initial fixation strength and ultimate tensile load. Use of new polyblend Polyethylene Suture material seems not to increase the initial biomechanical aspects of the repair construct.