100,453 research outputs found
MPTL reconstruction
No full textLanguage:Chinese.HardCover. Pub Date: 2014-7-1 Pages: 266 Publisher: People's Medical Publishing House Feng Hua. Zhang Hui editor of this patellofemoral instability (with CD-ROM clinical assessment and treatment) (fine) systematically expounded the patellar hip joint instability clinical diagnosis and treatment. especially for patellofemoral instability diverse bony risk factors. a fundamental correction of the mechanical environment. risk factors for various types of bone individualized identification. assessment and targeted correction. The author tries to modern diagnostic and treatment concepts presented to the reader. This book is available in sports injuries and arthroscopic surgery professional orthopedic surgeons. orthopedic resident physicians and specialist training system to learn
Sostituti Meniscali collagenici: Tecnica e risultati
No full textE' estremamente importante preservare il menisco quanto più possibile per evitare la progressione della degenerazione articolare del ginocchio. In effetti, un numero considerevole di pazienti soffre a causa degli effetti in seguito ad una meniscectomia artroscopica anche parziale.Stone, Steadman e Rodkey hanno sviluppato un nuovo tipo di scaffold in collagene I per sostituire il menisco in caso di rotture parziali/subtotali irreparabili: il CMI (Collagen Meniscus Implant). Dopo 13 anni di buoni risultati nell’uso del CMI mediale, nel 2006 abbiamo iniziato uno studio multicentrico europeo per valutarne l'efficacia e l'efficacia di uno scaffol meniscale equivalente appositamente progettato per riparare i difetti parziali/subtotati del menisco laterale (Lateral CMI). In questo articolo si descrivono le indicazioni per l’impianto di uno scaffol meniscale collagenico, l'evoluzione della tecnica chirurgica (da una tecnica di sutura artroscopica “in-out” ad una “all-inside”) nei nostri 13 anni di esperienza e una breve relazione sui nostri risultati clinici
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Increased Rotatory Laxity after Anterolateral Ligament Lesion in Anterior Cruciate Ligament- (ACL-) Deficient Knees: A Cadaveric Study with Noninvasive Inertial Sensors
No full textThe anterolateral ligament (ALL) has been suggested as an important secondary knee restrain on the dynamic laxity in anterior cruciate ligament- (ACL-) deficient knees. Nevertheless, its kinematical contribution to the pivot-shift (PS) phenomenon has not been clearly and objectively defined, and noninvasive sensor technology could give a crucial contribution in this direction. The aim of the present study was to quantify in vitro the PS phenomenon in order to investigate the differences between an ACL-deficient knee and an ACL+ALL-deficient knee. Ten fresh-frozen paired human cadaveric knees (n=20) were included in this controlled laboratory study. Intact, ACL-deficient, and ACL+ALL-deficient knees were subjected to a manual PS test quantified by a noninvasive triaxial accelerometer (KiRA, OrthoKey). Kinematic data (i.e., posterior acceleration of the tibial lateral compartment) were recorded and compared among the three statuses. Pairwise Student's t-test was used to compare the single groups (p<0.05). Intact knees, ACL-deficient knees, and ACL+ALL-deficient knees showed an acceleration of 5.3±2.1 m/s2, 6.3±2.3 m/s2, and 7.8±2.1 m/s2, respectively. Combined sectioning of ACL and ALL resulted in a statistically significant acceleration increase compared to both the intact state (p<0.01) and the ACL-deficient state (p<0.01). The acceleration increase determined by isolated ACL resection compared to the intact state was not statistically significant (p>0.05). The ALL sectioning increased the rotatory laxity during the PS after ACL sectioning as measured through a user-friendly, noninvasive triaxial accelerometer
Evaluation of the sealing function of the acetabular labrum: an in vitro biomechanical study
No full textPurpose: To quantitatively evaluate the biomechanical sealing function of an intact labrum and the effect of labral-chondral separation, cerclage suture labral repair, vertical mattress suture repair and partial labrectomy on distraction load and hip joint centre (HJC) displacement.
Methods: Eight fresh-frozen cadaveric hips were tested using a navigation system for intra-operative kinematic analysis. A six-axis load cell was used to measure the manually applied force when performing the tests: hip pivoting movement and distraction. The HJC displacement that occurred during the distraction test has been evaluated in correspondence of seven different values of applied force. During the pivoting motion, the maximum value of HJC displacement was evaluated. Five different conditions were tested: labrum intact, labral-chondral separation, vertical mattress suture repair, cerclage suture repair, and partial labrectomy.
Results: With regard to HJC displacement using at fixed value of force, the paired sample t test underscored the statistically significant differences (p < 0.05) for each of the five tested conditions among themselves. Only the comparison of intact versus labral-chondral separation was not significantly different. During pivoting motion, a statistically significantly greater displacement was identified after labrectomy when compared with the cerclage suture repair (p = 0.03) and vertical mattress repair (p < 0.01) in medial-lateral direction. Along proximal-distal direction, a significant lower displacement after labrectomy was identified when compared to the cerclage suture repair (p = 0.03). Performing the pivoting motion at the extreme ranges of motion demonstrated a higher value of displacement after labrectomy when compared with all the previously tested conditions.
Conclusions: These results suggest that labral repair is important in the function of the hip and that the vertical mattress suture technique may be better than the cerclage suture repair
Analysis of the knee rotation as predictor factor for postoperative laxity after acl reconstruction
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The influence of ACL reconstruction on post-operative rotational laxity: do the patients with higher values maintain higher values after the surgery?
No full textKinematics of ACL and anterolateral ligament. Part I: Combined lesion
No full textPurpose To quantify the influence of ALL lesions on static and dynamic laxity in ACL-deficient knee.
Methods The study was performed in 10 fresh-frozen knees. The joints were analysed in the following conditions: intact, ACL resection and ACL + ALL resection. Testing parameters were defined as: anterior displacement at 30° and 90° of flexion (AP30, AP90) applying a manualmaximum load; internal rotation at 30° and 90° of flexion (INT30, INT90) applying a 5 N m torque and internal rotation and acceleration during manual pivot-shift (PS) test. Kinematics was acquired by a navigation system; a testing rig and a torquemeter were used to control the limb position and the applied torque. Paired Student’s t test was conducted to assess statistical difference, and significance was set at P < 0.05.
Results The ALL resection determined a significant increase in terms of internal rotation (INT30 P = 0.02, INT90 P = 0.03), while AP30 (P n.s) and AP90 (P n.s) were not affected. ALL resection produced a significant increase in terms of acceleration during PS test (P < 0.01), but no significant change in PS internal rotation was observed
Do pre-operative knee laxity values influence post-operative ones after anterior cruciate ligament reconstruction?
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