1,721,022 research outputs found
First-Division Softball Players with Shoulder Injuries Exhibit Upper-Body Compensatory Strategies Compared to Healthy Controls: A Case Study Using Wearable Inertial Sensors
Full text linkThe aim of this study was to assess the kinematic differences in the upper limb and trunk between healthy and shoulder-injured softball position (non-pitchers) players. Eleven first-division softball players (mean age: 25.9 ± 8.1 years) were enrolled: five players who had experienced a shoulder injury with consequent surgery (time from surgery to test: 0.9 years) and six healthy matched controls. The position players performed their typical throw motor task after receiving the ball from a buddy. Wearable inertial sensors (Xsens MTw Awinda) were used to collect the kinematical data on the shoulder, elbow, and trunk. Peak joint kinematics and range of motion (ROM) were compared between healthy and injured players separately for the “Pickup” and “Pass” phases. In the pickup phase, a higher internal/external rotation ROM of the shoulder was found in healthy players than in the injured ones (p = 0.016). Similarly, elbow flex/extension ROM was higher in the healthy players (p = 0.039). A higher peak of trunk flexion was also found in healthy players than the injured ones (p = 0.002). In the pass phase, shoulder internal/external rotation, adduction/abduction, and flex/extension ROM were greater in healthy than injured players (p = 0.050, p = 0.001, and p = 0.007, respectively). Healthy players also showed a higher elbow peak flexion (p = 0.022). The shoulder-injured players showed a lower ROM than the healthy ones during both the pickup and pass phases of a throw motor task. Despite being cleared to return to play, the injured players could voluntarily or unconsciously perform the motor task in a more conservative way than the healthy controls
ACTLIFE - Physical ACTivity: the tool to improve the quality of life in osteoporosis people
No full textACTLIFE is focused on the development and dissemination across Europe of ACTLIFE protocol aimed to the secondary and tertiary prevention of osteoporosis consequences through physical activities. In particular the project aims to deal with bone mineral density and fear of falling in people with osteoporosis. Specific goals are:- Identification, assessment and sharing of an exercise program, the ACTLIFE protocol for physical activity, based on reviews at European level and declined in terms of dosing in people with established osteoporosis- Identify proper approach for the involvement of Health decision makers and stakeholders to raise awareness and promote sport and physical activity, implementing the ACTLIFE protocol inside the local and national Healthcare Programs and activating a network for its correct working- Identify organizational formats to facilitate the participation of people with osteoporosis in physical activity programs, identifying socioeconomic, cultural, and environmental barriers, raising awareness and involving the Health decision makers and concerned stakeholders, to implement and sustain over time the program identified by the first goal;- Raise awareness and involve the sport community and high education institutions to promote specific courses based on ACTLIFE protocol for people, held by specialists with degrees in physical education, advocating the involvement of policy makers to develop awareness campaigns for healthy life styl
Migration of the femoral component and clinical outcomes after total knee replacement: a narrative review
No full textPAIR - Physical Activity after knee or hip replacement
No full textAIR project aims to develop and promote a physical activity (PA) exercise program for subjects operated of total knee/hip replacement, to be followed after their discharge and rehabilitation treatment. The subjects will also be monitored about the adherence to the proposed program and in regards to any changes in lifestyle relatively to physical activity. This study will be carried out by involving surgeons, nurses, physiotherapists, graduates in movement science and patients, during and beyond the end of the normal health care. The aims of the project are- Identification of a PA exercise program suitable for people with knee/hip replacement, to improve physical function (balance, proprioception, rom, posture, muscular trophism) and quality of life (pain, fear of falling, autonomy during daily activities, socialization and prevention of depressive states).- Data collection through a survey on the consideration and understanding of "everyday" PA in relation to quality of life.- Promotion of the recovery of any sport activity interrupted before the operation.- Raising awareness of stakeholders and decision makers about the promotion of physical and sport activity aimed at subjects who have undergone knee or hip prostheses.- Evaluation of adherence to the proposed PA.- Involvement of the sport community and high education institutions to promote specific courses based on physical activity programs for individuals with total knee or hip arthroplasty. In the scientific literature, there are evidences and experiences on the effectiveness of physical activity but there is no "good practice" shared and accepted within the European system; there is also a lack of adequate promotion to explain the benefits and how to perform physical activity after the operations. The project aims to analyze local experiences in Europe and implement this "good practice", pledging to disseminate it at European level through the partnership structure and other actions
A positive correlation exists between intra- and post-operative kinematics of a Posterior Stabilized total knee arthroplasty: preliminary analysis
No full textIntroduction
Since aberrant kinematics has been claimed as possible reason for dissatisfaction after Total Knee Arthroplasty (TKA), to detect specific kinematical patterns in unsatisfied patients it is crucial to improve their outcomes. Recently some kinematical patterns have been detected however the further step should be detect intra-operatively the “abnormal” patterns and to prevent it. To reach this goal it is necessary to merge different technologies in order to couple the intra-operative kinematics with the post-operative one.
The aim of this study is to compare the passive flexion-extension kinematics acquired intra-operatively during a TKA surgery and to compare it with the post-operative flexion-extension one acquired during a sit-to-stand motor task.
Material and method
A cohort of 25 patients has been prospectively recruited and underwent intraoperative kinematic assessment with a commercial navigation system before and after Posterior-Stabilized TKA implantation. So far 5 patients underwent the post-operative evaluation at minimum 9 months follow-up with model based Dynamic RSA during the execution of the sit-to-stand. A correlation analysis has been conducted between the varus-valgus rotations (deg) at 0° and 30° of flexion, the antero-posterior translations at 90° of flexion acquired intra operatively and varus-valgus and AP acquired post-operatively.
Results
Statistically significant correlation (p<0.05) was found for VV a 30° of flexion (r=0.78, strong), AP a 90° of flexion (r=0.83, strong), and VV at 0° of flexion (r=0.37, poor).
Interpretation and conclusion
The findings of the present study confirm that intra-operative and post-operative kinematical parameter are comparable, and that positive strong correlation exists between VV rotations at 30° and AP translations at 90°. As a consequence of this finding, the intra-operative kinematic data could be used to detect kinematic pattern that are typical of unsatisfied patients in the post-operative period and therefore correct it during the operation
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The relationship between stress shielding, bone density changes and implant migration, failure and fracture after total knee arthroplasty: A systematic review
Full text linkPurpose: Total knee arthroplasty (TKA) represent a well‐established treatment for advanced osteoarthritis. Despite advancements in implant design and materials, the impact of stress shielding on bone mineral density (BMD) and its relationship with implant migration, loosening, and fracture remains insufficiently explored. This study aims to evaluate the association between stress shielding, BMD changes, and implant outcomes after TKA.
Methods: A systematic review was performed following the Preferred Reporting Items for Systematic Reviews and Meta‐Analysis (PRISMA) guidelines. Four major databases (MEDLINE (PubMed), Cochrane Central Register of Controlled Trials (CENTRAL), Web of Science (WOS), EMBASE) were thoroughly reviewed.
Results: A total of 491 studies were initially identified, of which nine met the inclusion criteria and were included in the final review. Eight were randomised controlled trials, and one was a prospective observational study. All
studies were conducted in clinical settings, comprising a total of 467 patients. BMD variations due to stress shielding were most pronounced during the first 6–12 months postoperatively. However, except for one isolated case, no direct correlation was identified between BMD changes caused by stress shielding and implant migration, loosening or fracture.
Conclusions: This systematic review highlights that variations in bone mineral density due to stress shielding are not directly correlated with implant failure, migration or loosening in TKA. Stress shielding remains a critical phenomenon, particularly in the early postoperative phases, emphasising the importance of optimised materials, fixation methods and implant designs to reduce bone loss and improve long‐term stability. Due toits recognised occurrence in clinical practice, further in vivo studies would contribute to a better understanding of the stress shielding
No kinematical difference between ultra-congruent and medial-congruent total knee arthroplasty when implanted with mechanical alignment: an in vivo dynamic RSA study
Full text linkPURPOSE: To explore in vivo kinematical behavior of the same total knee arthroplasty (TKA) cruciate-retaining (CR) femoral design with either medial-congruent (MC) or ultra-congruent (UC) inlay using model-based dynamic radiostereometric analysis (RSA). The hypothesis was that there would be comparable kinematics between the two groups. METHODS: A cohort of 16 randomly selected patients (8 MC Persona Zimmer, 8 UC Persona Zimmer) was evaluated through dynamic radiostereometric analysis (RSA) at a minimum of 9 months after TKA, during the execution of a sit-to-stand. The antero-posterior (AP) translation of the femoral component and the AP translation of the low point of medial and lateral femoral compartments were compared through Student’s t test (p < 0.05). RESULTS: Both groups showed a medial pivot behavior, with a significantly greater anterior translation of the Low Point of the lateral compartment with respect to the medial compartment (MC medial range: 2.4 ± 2.4 mm; MC lateral range: 7.7 ± 3.0 mm; p < 0.001 – UC medial range: 3.3 ± 3.3 mm; UC lateral range: 8.0 ± 3.2 mm; p < 0.001). A statistically significant greater degree of flexion was clinically recorded at follow-up visit in the MC group respect to the UC group (126° vs 101°—p = 0.003). CONCLUSION: The present study did not show difference in the medial pivot behavior between ultra-congruent and medial-congruent total knee arthroplasty when implanted with mechanical alignment; however, the MC group demonstrated a greater degree of flexion. The MC design examined is a valid alternative to the UC design, allowing to achieve a screw-home movement restoration combined with a high flexion. LEVEL OF EVIDENCE: IV
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