GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    The Role of Osteotomy for the Treatment of PCL Injuries
    Springer Science and Business Media LLC ; 2018
    In:  Current Reviews in Musculoskeletal Medicine Vol. 11, No. 2 ( 2018-6), p. 298-306
    Details
    In: Current Reviews in Musculoskeletal Medicine, Springer Science and Business Media LLC, Vol. 11, No. 2 ( 2018-6), p. 298-306
    Type of Medium: Online Resource
    ISSN: 1935-973X , 1935-9748
    URL: Article
    DOI: 10.1007/s12178-018-9488-x
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 2407827-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    To repair or not to repair: A biomechanics study of meniscal ramp lesions
    SAGE Publications ; 2019
    In:  The American Journal of Sports Medicine Vol. 47, No. 13 ( 2019-11), p. 3195-3202
    Details
    In: The American Journal of Sports Medicine, SAGE Publications, Vol. 47, No. 13 ( 2019-11), p. 3195-3202
    Abstract: Meniscal ramp lesions are possible concomitant injuries in cases of anterior cruciate ligament (ACL) deficiency. Although recent studies have investigated the influence of ramp lesions on knee kinematics, the effect on the ACL reconstruction graft remains unknown. Purpose/Hypothesis: The purpose was to determine the effects of ramp lesion and ramp lesion repair on knee kinematics, the in situ forces in the ACL, and bony contact forces. It was hypothesized that ramp lesions will significantly increase in situ forces in the native ACL and bony contact forces and that ramp lesion repair will restore these conditions comparably with those forces of the intact knee. Study Design: Controlled laboratory study. Methods: Investigators tested 9 human cadaveric knee specimens using a 6 degrees of freedom robotic testing system. The knee was continuously flexed from full extension to 90° while the following loads were applied: (1) 90-N anterior load, (2) 5 N·m of external-rotation torque, (3) 134-N anterior load + 200-N compression load, (4) 4 N·m of external-rotation torque + 200-N compression load, and (5) 4 N·m of internal-rotation torque + 200-N compression load. Loading conditions were applied to the intact knee, a knee with an arthroscopically induced 25-mm ramp lesion, and a knee with an all-inside repaired ramp lesion. In situ forces in the ACL, bony contact forces in the medial compartment, and bony contact forces in the lateral compartment were quantified. Results: In response to all loading conditions, no differences were found with respect to kinematics, in situ forces in the ACL, and bony contact forces between intact knees and knees with a ramp lesion. However, compared with intact knees, knees with a ramp lesion repair had significantly reduced anterior translation at flexion angles from full extension to 40° in response to a 90-N anterior load ( P 〈 .05). In addition, a significant decrease in the in situ forces in the ACL after ramp repair was detected only for higher flexion angles when 4 N·m of external-rotation torque combined with a 200-N compression load ( P 〈 .05) and 4 N·m of internal-rotation torque combined with a 200-N compression load were applied ( P 〈 .05). Conclusion: In this biomechanical study, ramp lesions did not significantly affect knee biomechanics at the time of surgery. Clinical Relevance: From a biomechanical time-zero perspective, the indications for ramp lesion repair may be limited.
    Type of Medium: Online Resource
    ISSN: 0363-5465 , 1552-3365
    URL: Article
    URL: Article
    DOI: 10.1177/0363546519872964
    DOI: 10.21203/rs.2.19672/v1
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2063945-4
    SSG: 31
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Static Lateral Tibial Plateau Subluxation Predicts High-Grade Rotatory Knee Laxity in Anterior Cruciate Ligament–Deficient Knees
    SAGE Publications ; 2019
    In:  The American Journal of Sports Medicine Vol. 47, No. 2 ( 2019-02), p. 277-284
    Details
    In: The American Journal of Sports Medicine, SAGE Publications, Vol. 47, No. 2 ( 2019-02), p. 277-284
    Abstract: In anterior cruciate ligament–deficient (ACL-D) knees, injury pattern and bony morphologic features have been shown to influence both static anterior tibial subluxation relative to the femur and dynamic rotatory knee laxity. Therefore, the relationship between static anterior tibial subluxation and dynamic rotatory knee laxity was investigated. Purpose: To determine whether static tibial subluxation as measured on magnetic resonance imaging (MRI) is associated with the grade of rotatory knee laxity in ACL-D knees. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Two-hundred fifty-eight knees underwent preoperative, image-guided assessment of lateral knee compartment translation during quantitative pivot shift (QPS). Subluxations of the medial and lateral tibial plateaus were measured on preoperative MRI in a subset of primary ACL-D knees meeting criteria for high-grade (QPS 〉 5.2 mm) and low-grade (QPS 〈 2.4 mm) rotatory laxity. Tibial subluxations on MRI were compared between patients with high- and low-grade rotatory laxity through use of pairwise t test and were analyzed via univariate and multivariate logistic regression. Significance was set at P 〈 .05. Results: On MRI, greater anterior subluxation of the lateral tibial plateau was observed in patients with high-grade compared with low-grade rotatory knee laxity (4.5 mm vs 2.3 mm; P 〈 .05). No similar relationship was observed for the medial tibial plateau (−0.9 mm vs −0.4 mm; P 〉 .05). Univariate logistic regression demonstrated that static subluxation of the lateral tibial plateau was associated with high-grade rotatory knee laxity (odds ratio [OR], 1.2; P 〈 .05). An optimal cutoff of 2.95 mm of static lateral tibial subluxation was associated with high-grade rotatory knee laxity (sensitivity, 75%; specificity, 63%). Lateral meniscal injury was the first variable entered into a multivariate regression analysis and proved to be most associated with high-grade rotatory knee laxity (OR, 6.8; P 〈 .05). When lateral meniscal injury was excluded from multivariate regression analysis, static anterior subluxation of the lateral tibial plateau alone was associated with high-grade rotatory knee laxity (OR, 1.2; P 〈 .05). Conclusion: Data from this MRI study of two distinct rotatory knee laxity groups showed that static anterior subluxation of the lateral tibial plateau of 2.95 mm or greater was associated with high-grade rotatory knee laxity, and each millimeter increase of lateral tibial plateau subluxation was associated with a 1.2-fold odds of high-grade rotatory knee laxity. Anterior subluxation of the lateral tibial plateau on MRI was not independently associated with high-grade rotatory knee laxity in the presence of concomitant lateral meniscal injury. Static measurements made preoperatively may aid in predicting high-grade rotatory knee laxity and refining the indications for individualized knee surgery.
    Type of Medium: Online Resource
    ISSN: 0363-5465 , 1552-3365
    URL: Article
    DOI: 10.1177/0363546518812435
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2063945-4
    SSG: 31
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Partial Lateral Meniscectomy Affects Knee Stability Even in Anterior Cruciate Ligament-Intact Knees
    Ovid Technologies (Wolters Kluwer Health) ; 2020
    In:  Journal of Bone and Joint Surgery Vol. 102, No. 7 ( 2020-4-1), p. 567-573
    Details
    In: Journal of Bone and Joint Surgery, Ovid Technologies (Wolters Kluwer Health), Vol. 102, No. 7 ( 2020-4-1), p. 567-573
    Abstract: The effects of a partial lateral meniscectomy on knee kinematics and forces in the lateral meniscus are critical to understand. The purpose of this study was to quantify the effects of varying sizes of partial lateral meniscectomies of the posterior horn and a total lateral meniscectomy on knee kinematics and resultant forces in the lateral meniscus. Methods: Using a robotic testing system, loads (134-N anterior tibial load + 200-N axial compression, 5-Nm internal tibial torque + 5-Nm valgus torque, and 5-Nm external tibial torque + 5-Nm valgus torque) were applied to 10 fresh-frozen cadaveric knees. The resulting joint motion and resultant forces in the lateral meniscus were determined for 4 knee states: intact, one-third and two-thirds partial lateral meniscectomies of the posterior horn, and total lateral meniscectomy. Results: A decrease in lateral translation of the tibia (up to 166.7%) was observed after one-third partial lateral meniscectomies of the posterior horn compared with the intact knee, in response to an anterior load at all knee flexion angles tested (p 〈 0.05). One-third partial lateral meniscectomies of the posterior horn decreased the resultant forces in the lateral meniscus compared with the intact knee at all knee flexion angles tested in response to an anterior load (p 〈 0.05) and to an internal tibial torque (p 〈 0.05). The results of two-thirds partial lateral meniscectomies of the posterior horn were similar to those of one-third partial meniscectomies (p 〉 0.05). Total lateral meniscectomies further decreased the lateral translation of the tibia (up to 316.6%) compared with the intact knee in response to an anterior load (p 〈 0.05). Conclusions: The changes in joint motion and meniscal forces observed in this study after even small partial lateral meniscectomies may predispose knees to further injury. Clinical Relevance: Surgeons should always consider repairing and minimizing the resection of even small lateral meniscal tears to prevent the potential deleterious effects of partial meniscectomy reported in this cadaveric study.
    Type of Medium: Online Resource
    ISSN: 0021-9355 , 1535-1386
    URL: Article
    DOI: 10.2106/JBJS.19.00712
    RVK:
    XA 52200.A
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Preoperative Meniscal Extrusion Predicts Unsatisfactory Clinical Outcomes and Progression of Osteoarthritis after Isolated Partial Medial Meniscectomy: A 5-Year Follow-Up Study
    Georg Thieme Verlag KG ; 2022
    In:  The Journal of Knee Surgery Vol. 35, No. 04 ( 2022-03), p. 393-400
    Details
    In: The Journal of Knee Surgery, Georg Thieme Verlag KG, Vol. 35, No. 04 ( 2022-03), p. 393-400
    Abstract: The objective of this study was to examine the association between preoperative meniscal extrusion of patients undergoing partial medial meniscectomy with clinical outcomes and progression of osteoarthritis and to determine the extent of meniscal extrusion associated with unsatisfactory clinical outcomes and progression of osteoarthritis. Ninety-five patients who underwent partial medial meniscectomy with a minimum follow-up of 5 years were retrospectively reviewed. Preoperative meniscal extrusion was evaluated with magnetic resonance imaging. Patients were assessed preoperatively and postoperatively with Lysholm and International Knee Documentation Committee (IKDC) subjective scores for clinical outcomes and with IKDC radiographic scale for osteoarthritis. An ANOVA (Analysis of Variance) was used to analyze the variations in meniscal extrusion and the clinical and radiological outcomes. A regression analysis was performed to identify factors that affect preoperative medial meniscus extrusion and that influence results after partial meniscectomy. An optimal cutoff value for meniscal extrusion associated with unsatisfactory clinical outcomes and progression of osteoarthritis was established. Significance was set at p  〈  0.05. The mean ± SD preoperative and postoperative Lysholm scores were 59.6 ± 15.5 versus 83.8 ± 13.1 (p  〈  0.001) and the mean preoperative and postoperative IKDC subjective scores were 59.4 ± 16.8 versus 82.0 ± 15.8 (p  〈  0.001). Meniscal extrusion greater than 2.2 mm (sensitivity, 84%; specificity, 81%) and 2.8 mm (sensitivity, 73%; specificity, 85%) was associated with unsatisfactory (poor/fair) Lysholm and IKDC subjective scores, respectively. The progression of osteoarthritis, characterized as a change of at least one category on the IKDC radiographic scale, occurred when meniscal extrusion was greater than 2.2 mm (sensitivity, 63%; specificity, 75%). Patients with higher body mass index (BMI) had significantly greater meniscal extrusion that patients with normal BMI (p  〈  0.001). The medial meniscus was more extruded in patients with horizontal and root tears. In conclusion, patients with preoperative meniscal extrusion of 2.2 mm or greater had unsatisfactory clinical outcomes and progression of osteoarthritis after partial medial meniscectomy at a minimum of 5 years follow-up. Higher BMI and horizontal and root tears were associated with greater preoperative meniscal extrusion.
    Type of Medium: Online Resource
    ISSN: 1538-8506 , 1938-2480
    URL: Article
    DOI: 10.1055/s-0040-1715109
    Language: English
    Publisher: Georg Thieme Verlag KG
    Publication Date: 2022
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Does Lateral Extra-articular Tenodesis of the Knee Affect Anterior Cruciate Ligament Graft In Situ Forces and Tibiofemoral Contact Pressures?
    Elsevier BV ; 2020
    In:  Arthroscopy: The Journal of Arthroscopic & Related Surgery Vol. 36, No. 5 ( 2020-05), p. 1365-1373
    Details
    In: Arthroscopy: The Journal of Arthroscopic & Related Surgery, Elsevier BV, Vol. 36, No. 5 ( 2020-05), p. 1365-1373
    Type of Medium: Online Resource
    ISSN: 0749-8063
    URL: Article
    DOI: 10.1016/j.arthro.2020.01.051
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 1491233-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    The effect of adipose-derived stem cells on enthesis healing after repair of acute and chronic massive rotator cuff tears in rats
    Elsevier BV ; 2019
    In:  Journal of Shoulder and Elbow Surgery Vol. 28, No. 4 ( 2019-04), p. 654-664
    Details
    In: Journal of Shoulder and Elbow Surgery, Elsevier BV, Vol. 28, No. 4 ( 2019-04), p. 654-664
    Type of Medium: Online Resource
    ISSN: 1058-2746
    URL: Article
    DOI: 10.1016/j.jse.2018.08.044
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2019
    detail.hit.zdb_id: 2046901-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Long-Term Survival Analysis and Outcomes of Meniscal Allograft Transplantation With Minimum 10-Year Follow-Up: A Systematic Review
    Elsevier BV ; 2019
    In:  Arthroscopy: The Journal of Arthroscopic & Related Surgery Vol. 35, No. 2 ( 2019-02), p. 659-667
    Details
    In: Arthroscopy: The Journal of Arthroscopic & Related Surgery, Elsevier BV, Vol. 35, No. 2 ( 2019-02), p. 659-667
    Type of Medium: Online Resource
    ISSN: 0749-8063
    URL: Article
    DOI: 10.1016/j.arthro.2018.08.031
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2019
    detail.hit.zdb_id: 1491233-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Effect of Meniscal Ramp Repair on Knee Kinematics, ACL In Situ Force and Bony Contact Forces - A Biomechanical Study
    SAGE Publications ; 2018
    In:  Orthopaedic Journal of Sports Medicine Vol. 6, No. 7_suppl4 ( 2018-07-01), p. 2325967118S0015-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 6, No. 7_suppl4 ( 2018-07-01), p. 2325967118S0015-
    Abstract: While recent studies showed that all inside meniscal ramp repair is able to restore knee kinematics, the effects of ramp repairs on ACL in-situ forces (ISF) and bony contact forces is still unclear. Therefore, the purpose of this study is to determine the effect of ramp lesion repair on knee kinematics, the ACL-ISF and bony contact forces using a 6-degree-of-freedom (DOF) robotic testing system. It was hypothesized that ramp repair will restore kinematics, ACL-ISF and bony contact forces comparably to the forces of the intact knee. Methods: 5 fresh-frozen human cadaveric knee specimens were tested using a 6-DOF robotic testing system (FRS2010) to continuously flex the knee from 0° to 90° and apply continuous loading conditions: 134 N anterior load + 200 N compressive load (CL), 4 Nm internal torque + 200 N CL, 4 Nm external torque + 200 N CL. Loading conditions were applied to the: 1) Intact knee 2) Arthroscopically induced 25 mm ramp lesion via posteromedial portal 3) All inside ramp repair 4) ACL deficient knee + ramp repair 5) soft tissue removal 6) Transection of the lateral condyle. To mimic an ideal ACL reconstruction the native ACL was kept intact. By replaying kinematics, ACL-ISF and bony contact forces were determined. Repeated measure ANOVAs were performed to compare knee states at each flexion angle (p 〈 0.05). Results: Ramp repair significantly reduced anterior translation compared to the ramp deficient knee in high flexion under anterior load and CL (mean diff. -0.8 mm, range 0.6-0.9 mm) and at all flexions angles while applying internal torque and CL (mean diff. -2.3 mm, range 1.8-3.3 mm). Increased medial translation and valgus position were observed in all loading conditions at all flexion angles. Both ACL-ISF and medial bony contact forces were not significantly altered by the ramp lesion and repair under any applied loading and flexion angle. In contrast, ramp repair significantly increased lateral bony contact forces by under external torque and CL at 60° and 70° flexion compared to the ramp deficient knee, 32 N and 37 N respectively. No significant differences between intact and ramp deficient knee were detected with respect to kinematics, ACL-ISF and bony contact forces. Conclusion: In this study ramp repair decreased anterior translation, increased valgus rotation, and increased bony contact forces in the lateral compartment, disproving the hypothesis under study. The data from this study puts into question potential overconstraint when repairing ramp lesions utilizing all inside devices in 10 degrees of knee flexion. Contrasting previous literature that showed the restoration of the intact state, the results might be attributable to added CL forces and missing influence of the ACL reconstructions. The findings of this study also imply that untreated ramp lesion might not affect ACL-ISF. Future research is needed to better understand the influence of different techniques for repair of ramp lesions and the effect of chronicity on ramp lesions in patients.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/2325967118S00157
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2706251-X
    SSG: 31
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Static Lateral Tibial Plateau Subluxation Predicts the Grade of Rotatory Knee Laxity in ACL-Deficient Knees
    SAGE Publications ; 2019
    In:  Orthopaedic Journal of Sports Medicine Vol. 7, No. 7_suppl5 ( 2019-07), p. 2325967119S0029-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 7, No. 7_suppl5 ( 2019-07), p. 2325967119S0029-
    Abstract: In anterior cruciate ligament-deficient (ACL-D) knees, injury pattern and bony morphology have been shown to influence both static anterior tibial subluxation relative to the femur and dynamic rotatory knee laxity. Therefore, the relationship between static anterior tibial subluxation and dynamic rotatory knee laxity was investigated. The goal of this study was to determine if static tibial subluxation as measured on magnetic resonance imaging (MRI) was associated with the grade of rotatory knee laxity in ACL-D knees. Methods: Two-hundred and fifty-eight knees underwent preoperative, image-guided assessment of lateral knee compartment translation during quantitative pivot shift (QPS). Subluxations of the medial and lateral tibial plateaus were measured on preoperative MRI in a subset of primary ACL-D knees meeting criteria for high-grade (QPS 〉 5.2 mm) and low-grade (QPS 〈 2.4 mm) rotatory laxity. Tibial subluxations on MRI were compared between patients with high- and low-grade rotatory laxity using pairwise t-test, and analyzed using uni- and multivariate logistic regression. Significance was set at p 〈 0.05. Results: On MRI, greater anterior subluxation of the lateral tibial plateau was observed in patients with high-grade compared to low-grade rotatory knee laxity (4.5 mm vs. 2.3 mm; p 〈 0.05). No similar relationship was observed for the medial tibial plateau (-0.9 mm vs. -0.4 mm; p 〉 0.05). Univariate logistic regression demonstrated that static subluxation of the lateral tibial plateau was associated with high-grade rotatory knee laxity (Odds ratio [OR] 1.2; p 〈 0.05). An optimal cut-off of 2.95 mm of static lateral tibial subluxation was associated with high-grade rotatory knee laxity (sensitivity: 75%; specificity: 63%). Lateral meniscus injury was the first variable to enter a multivariate regression analysis and proved to be most associated with high-grade rotatory knee laxity ([OR] 6.8; p 〈 0.05). When lateral meniscus injury was excluded from multivariate regression analysis, static anterior subluxation of the lateral tibial plateau alone was associated with high-grade rotatory knee laxity ([OR] 1.2; p 〈 0.05). Conclusion: Data from this MRI study of two distinct rotatory knee laxity groups showed that static anterior subluxation of the lateral tibial plateau of 2.95 mm or greater was associated with high-grade rotatory knee laxity, and each millimeter increase of lateral tibial plateau subluxation was associated with a 1.2-fold odds of high-grade rotatory knee laxity. Anterior subluxation of the lateral tibial plateau on MRI was not independently associated with high-grade rotatory knee laxity in the presence of concomitant lateral meniscus injury. Static measurements made pre-operatively may aid in predicting high-grade rotatory knee laxity and refining the indications for individualized knee surgery.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/2325967119S00296
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2706251-X
    SSG: 31
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...