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  • 1
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    The incidence and significance of femoral tunnel widening after quadrupled hamstring anterior cruciate ligament reconstruction using femoral cross pin fixation
    Elsevier BV ; 2003
    In:  Arthroscopy: The Journal of Arthroscopic & Related Surgery Vol. 19, No. 5 ( 2003-5), p. 470-476
    Details
    In: Arthroscopy: The Journal of Arthroscopic & Related Surgery, Elsevier BV, Vol. 19, No. 5 ( 2003-5), p. 470-476
    Type of Medium: Online Resource
    ISSN: 0749-8063
    URL: Article
    DOI: 10.1053/jars.2003.50106
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2003
    detail.hit.zdb_id: 1491233-8
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  • 2
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    Performance and Return to Sport After Sports Hernia Surgery in NFL Players
    SAGE Publications ; 2017
    In:  Orthopaedic Journal of Sports Medicine Vol. 5, No. 4 ( 2017-04-01), p. 232596711769959-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 5, No. 4 ( 2017-04-01), p. 232596711769959-
    Abstract: Recognition, diagnosis, and treatment of athletic pubalgia (AP), also known as sports hernia, once underrecognized and undertreated in professional football, are becoming more common. Surgery as the final treatment for sports hernia when nonsurgical treatment fails remains controversial. Given the money involved and popularity of the National Football League (NFL), it is important to understand surgical outcomes in this patient population. Hypothesis: After AP surgery, players would: (1) return to sport (RTS) at a greater than 90% rate, (2) play fewer games for fewer years than matched controls, (3) have no difference in performance compared with before AP surgery, and (4) have no difference in performance versus matched controls. Study Design: Cohort study; Level of evidence, 3. Methods: Internet-based injury reports identified players who underwent AP surgery from January 1996 to August 2015. Demographic and performance data were collected for each player. A 1:1 matched control group and an index year analog were identified. Control and case performance scores were calculated using a standardized scoring system. Groups were compared using paired Student t tests. Results: Fifty-six NFL players (57 AP surgeries) were analyzed (mean age, 28.2 ± 3.1 years; mean years in NFL at surgery, 5.4 ± 3.2). Fifty-three players were able to RTS. Controls were in the NFL longer ( P 〈 .05) than players who underwent AP surgery (3.8 ± 2.4 vs 3.2 ± 2.1 years). Controls played more games per season ( P 〈 .05) than post-AP players (14.0 ± 2.3 vs 12.0 ± 3.4 games per season). There was no significant ( P 〉 .05) difference in pre- versus post-AP surgery performance scores and no significant ( P 〉 .05) difference in postoperative performance scores versus controls post-index. Conclusion: There was a high RTS rate after AP surgery without a significant difference in postoperative performance, though career length and games per season after AP surgery were significantly less than that of matched controls.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/2325967117699590
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2706251-X
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  • 3
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    Multistranded Hamstring Tendon Graft Fixation with a Central Four-Quadrant or a Standard Tibial Interference Screw for Anterior Cruciate Ligament Reconstruction
    SAGE Publications ; 2003
    In:  The American Journal of Sports Medicine Vol. 31, No. 3 ( 2003-03), p. 338-344
    Details
    In: The American Journal of Sports Medicine, SAGE Publications, Vol. 31, No. 3 ( 2003-03), p. 338-344
    Abstract: Tibial fixation of hamstring tendon grafts has been the weak link in anterior cruciate ligament reconstruction. Hypothesis Use of a central four-quadrant sleeve and screw provides superior fixation when compared with standard interference screw fixation. Study Design Controlled laboratory study. Methods In eight pairs of cadaveric knees each anterior cruciate ligament was reconstructed using either an interference screw or a central sleeve and screw on the tibial side. The specimens were then subjected to cyclic loading followed by a load-to-failure test. Results The load required to cause 1 and 2 mm of graft laxity, defined as the separation of the femur and the tibia at the points of graft fixation, was significantly greater with the sleeve and screw than with the interference screw (at 2 mm: sleeve and screw, 216.1 ± 30.1 N; interference screw, 167.0 ± 33.2 N). The force at initial slippage for each of the graft strands was significantly higher with use of the central sleeve and screw. Conclusions The four-quadrant sleeve and screw device may provide greater surface area for healing of hamstring tendon grafts and allow equal tensioning of graft strands before fixation. These factors are associated with increased strength of fixation and reduced laxity of the graft after cyclic loading. Clinical Relevance Use of the central four-quadrant sleeve and screw system offers increased strength of fixation in anterior cruciate ligament reconstruction with hamstring tendon graft.
    Type of Medium: Online Resource
    ISSN: 0363-5465 , 1552-3365
    URL: Article
    DOI: 10.1177/03635465030310030301
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2003
    detail.hit.zdb_id: 2063945-4
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  • 4
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    A Biomechanical Comparison of Fifth Metatarsal Jones Fracture Fixation Methods - What is the Ideal Construct?
    Elsevier BV ; 2017
    In:  Arthroscopy: The Journal of Arthroscopic & Related Surgery Vol. 33, No. 10 ( 2017-10), p. e82-
    Details
    In: Arthroscopy: The Journal of Arthroscopic & Related Surgery, Elsevier BV, Vol. 33, No. 10 ( 2017-10), p. e82-
    Type of Medium: Online Resource
    ISSN: 0749-8063
    URL: Article
    DOI: 10.1016/j.arthro.2017.08.076
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2017
    detail.hit.zdb_id: 1491233-8
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  • 5
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    Performance and Return to Sport After Clavicle Open Reduction and Internal Fixation in National Football League Players
    SAGE Publications ; 2017
    In:  Orthopaedic Journal of Sports Medicine Vol. 5, No. 8 ( 2017-08-01), p. 232596711772067-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 5, No. 8 ( 2017-08-01), p. 232596711772067-
    Abstract: Clavicle fractures are common injuries in professional football. Surgical fixation of these injuries may lead to decreased nonunion rates, improved shoulder strength, and decreased residual functional impairment. Purpose: To determine (1) return-to-sport (RTS) rate in National Football League (NFL) players after clavicle fracture open reduction and internal fixation (ORIF), (2) postoperative career length and games per season, (3) pre- and postoperative performance, and (4) postoperative performance compared with control players matched by position, age, years of experience, and performance. Study Design: Cohort study; Level of evidence, 3. Methods: Publicly available records were used to identify players who underwent surgical treatment of a clavicle fracture while playing in the NFL. Demographic and performance data were collected for each player, and matched controls were identified. Control and case performance scores were calculated using a standardized scoring system. RTS was defined as playing in 1 NFL game after surgery. Comparisons between case and control groups at preoperative and postoperative time points were made using paired-samples Student t tests. Results: Seventeen surgeries (16 players) were analyzed. Fifteen players (94.1%) were able to RTS in the NFL at a mean 211.3 ± 144.7 days postsurgery; 7 (44%) returned within the same season as their injury and subsequent fixation. The overall rate of a player’s remaining in the NFL 1 year after surgery was 88.2%. Players who underwent surgery played in a similar number of games per season and had similar career lengths in the NFL as controls ( P 〉 .05). There were no significant ( P 〉 .05) differences between cases and matched controls presurgery and preindex. There was no difference ( P 〉 .05) in postoperative performance scores or games per season compared with preoperative scores or games per season for any position. Quarterbacks (n = 3, P = .049) and running backs (n = 5, P = .039) had significantly worse postoperative performance scores when compared with postindex matched controls. Conclusion: There is a high rate of RTS in the NFL after clavicle fracture ORIF. Players who underwent clavicle fracture ORIF played in a similar number of games per season and had similar career lengths in the NFL as controls. Quarterbacks and running backs had significantly worse postoperative performance scores when compared with postindex matched controls.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/2325967117720677
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2706251-X
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  • 6
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    Performance and Return to Sport After Nonoperative Treatment of Clavicle Fractures in National Football League Players
    SLACK, Inc. ; 2017
    In:  Orthopedics Vol. 40, No. 5 ( 2017-09)
    Details
    In: Orthopedics, SLACK, Inc., Vol. 40, No. 5 ( 2017-09)
    Abstract: Clavicle fractures are often seen in contact sports. The purpose of this study was to determine (1) return-to-sport (RTS) rate of National Football League (NFL) players following nonoperative treatment of clavicle fractures, (2) posttreatment career length and games per season, (3) pre- and posttreatment performance, and (4) posttreatment performance compared with control players matched by position, age, years of experience, and performance. Public records were used to identify NFL players who underwent nonoperative treatment of clavicle fractures. Demographic and performance data were collected for each player. Matched controls (position, age, experience, and performance) were identified. Control and case performance scores were calculated using a standardized scoring system. Return to sport was defined as playing a minimum of 1 game after treatment. Comparisons between the 2 groups and pre- and posttreatment time points were made using paired-samples Student's t tests. Thirty players (32 fractures) were analyzed. Two players fractured their contralateral clavicle. Of the players analyzed, 96.9% were able to RTS at a mean of 244.6±119.6 days. Eight players (27.6%) returned within the same season as their injury. Overall 1-year survival rate posttreatment was 93.5%. Players with nonoperative treatment had career lengths similar to those of controls ( P 〉 .05). No significant ( P 〉 .05) differences existed in demographic, performance, or games per season data between position groups for cases and matched controls pretreatment and preindex and in posttreatment compared with pretreatment performance scores. Wide receivers played fewer games per season ( P =.043) following treatment. No position group had significantly worse posttreatment performance scores when compared with postindex matched controls. [ Orthopedics. 2017; 40(5):e836–e843.]
    Type of Medium: Online Resource
    ISSN: 0147-7447 , 1938-2367
    URL: Article
    DOI: 10.3928/01477447-20170719-03
    Language: English
    Publisher: SLACK, Inc.
    Publication Date: 2017
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  • 7
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    Comparison of MRI, CT, Dunn 45° and Dunn 90° alpha angle measurements in femoroacetabular impingement
    SAGE Publications ; 2018
    In:  HIP International Vol. 28, No. 4 ( 2018-07), p. 450-455
    Details
    In: HIP International, SAGE Publications, Vol. 28, No. 4 ( 2018-07), p. 450-455
    Abstract: To determine if a significant difference existed among alpha angle measurements between 4 imaging techniques, axial oblique CT and MRI, Dunn 45° and Dunn 90° plain radiographs, in patients with symptomatic cam femoroacetabular impingement (FAI) and labral tear. Methods: A single-surgeon prospective radiographic analysis of consecutive non-arthritic and non-dysplastic -patients with symptomatic FAI and labral tears who underwent surgery was performed. Alpha angle was measured using standard techniques as described by Nötzli. Cam morphology was defined via alpha angle measurement of 〉 50.5 degrees. Group comparisons were made using ANOVA and chi-squared test. Sample size calculation was performed prior to study enrollment. Results: 31 subjects (16 female; 33.5 ± 10.5 years mean age) were included. There was a significant difference in alpha angle measurements between all 4 imaging techniques (F [3,120] = 8.144; p 〈 0.001), with the Dunn 45° view (66.3 ± 11.4°) significantly greater than all 3 other techniques (Dunn 90° [57.5 ± 10.7°; p = 0.015], MRI [53.3 ± 11.5°; p 〈 0.001], and CT (54.9 ± 11.6°; p = 0.001). There was no significant difference in alpha angle between Dunn 90°, MRI, and CT. There was a significant difference in the observed number of hips with cam morphology between imaging techniques (χ2 9.4; p = 0.025). Conclusions: The Dunn 45° radiograph yielded a significantly higher alpha angle than Dunn 90°, axial oblique MRI, and CT imaging modalities. Use of the Dunn 90° or axial oblique MRI or CT as the threshold for cam osteoplasty may result in untreated symptomatic cam FAI. The authors recommend the Dunn 45° radiograph as the most sensitive evaluation of cam morphology.
    Type of Medium: Online Resource
    ISSN: 1120-7000 , 1724-6067
    URL: Article
    DOI: 10.5301/hipint.5000602
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 1475775-8
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  • 8
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    Progression of Hamate Hook Stress Reactions in Elite Baseball Players
    SAGE Publications ; 2020
    In:  Orthopaedic Journal of Sports Medicine Vol. 8, No. 5 ( 2020-05-01), p. 232596712091938-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 8, No. 5 ( 2020-05-01), p. 232596712091938-
    Abstract: Hamate hook fractures can occur as a result of repetitive contact with the knob of the bat used in the sport of baseball. Hamate hook excision has resulted in excellent outcomes and return to sport (RTS) in elite baseball players. The ideal treatment for hamate stress response before the development of a fracture line is unknown. Purpose: To report the outcomes of elite baseball players with hamate bone edema. Study Design: Case series; Level of evidence, 4. Methods: We reviewed the medical records of all elite baseball players with hamate bone edema consistent with a stress response at 2 institutions. Players were eligible for inclusion if they played collegiate or professional baseball at the time of initial injury, had magnetic resonance imaging (MRI) showing hamate bone edema, and had no radiographic evidence of acute fracture lines at initial presentation. Results: A total of 4 players with a mean age of 22.8 years were included. All injuries occurred in the nondominant hand. All athletes had normal initial wrist radiographs and MRI showing hamate edema but no fracture line. Patients returned to play as tolerated and developed an acute injury at an average of 25.8 days (range, 10-56 days) from the initial presentation. Repeat radiographs demonstrated acute hamate hook fractures in all 4 (100%) athletes. All 4 athletes underwent hamate hook excision. There were no postoperative complications. All athletes returned to sport at their previous level of competition at a mean of 5.3 weeks (range, 3.6-7.3 weeks). Conclusion: There is a high rate of hamate bone edema progression to acute hamate hook fracture in elite baseball players, with 100% RTS at preinjury level after hamate hook excision. We therefore recommend against prolonged rest. Continuation of play with hamate bone edema followed by hamate hook excision for acute fracture limits the time missed and obtains a faster RTS in elite baseball players.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/2325967120919389
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
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  • 9
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    Receptor-Mediated Delivery of CRISPR-Cas9 Endonuclease for Cell-Type-Specific Gene Editing
    American Chemical Society (ACS) ; 2018
    In:  Journal of the American Chemical Society Vol. 140, No. 21 ( 2018-05-30), p. 6596-6603
    Details
    In: Journal of the American Chemical Society, American Chemical Society (ACS), Vol. 140, No. 21 ( 2018-05-30), p. 6596-6603
    Type of Medium: Online Resource
    ISSN: 0002-7863 , 1520-5126
    URL: Article
    URL: Article
    DOI: 10.1021/jacs.8b01551
    DOI: 10.1021/jacs.8b01551.s001
    RVK:
    VA 1120 ; VA 1752
    Language: English
    Publisher: American Chemical Society (ACS)
    Publication Date: 2018
    detail.hit.zdb_id: 1472210-0
    detail.hit.zdb_id: 3155-0
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  • 10
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    A Biomechanical Comparison of Repair Techniques for Type II SLAP Lesions
    SAGE Publications ; 2004
    In:  The American Journal of Sports Medicine Vol. 32, No. 3 ( 2004-04), p. 727-733
    Details
    In: The American Journal of Sports Medicine, SAGE Publications, Vol. 32, No. 3 ( 2004-04), p. 727-733
    Abstract: Multiple options exist for repair of superior labral tears. Purpose To compare commonly used fixation techniques for superior labral tears. Study Design Biomechanical cadaveric study. Methods A comparison of the initial strengths of fixation for type II superior labral anterior posterior (SLAP) lesions was performed in three cadaveric shoulder groups, each containing seven specimens. Two groups were repaired with screw-in anchors; one group had vertical sutures, the other horizontal. Group 3 was repaired using bioabsorbable tacks. Cyclic traction was applied to the biceps tendon. Repair failure (2 mm of permanent displacement) and ultimate failure were measured. Results Specimen stiffness was similar between groups. The mean load to repair failure was 123 ± 17 N in group 1, 114 ± 11 N in group 2, and 95 ± 13 N in group 3. The mean load to ultimate failure was 163 ± 15 N, 161 ± 12 N, and 145 ± 12 N, respectively. Although the repair failure loads of groups 1 and 2 were 29% and 17%, respectively, greater than the tack group, the differences were not statistically significant (P 〉 .05). All ultimate failures occurred at the labral-implant interface. Conclusion Initial fixation strength of tissue tack and suture anchor repairs of SLAP lesions are comparable.
    Type of Medium: Online Resource
    ISSN: 0363-5465 , 1552-3365
    URL: Article
    DOI: 10.1177/0095399703258751
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2004
    detail.hit.zdb_id: 2063945-4
    SSG: 31
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