THA Kinematics and Sound for Subjects Implanted Using Various Surgical Approaches
Hip InjuriesIn a previous study conducted within the Center for Musculoskeletal Research (CMR) on Total Hip Arthroplasties (THA), it was determined that the investigators could simultaneously capture in vivo sound and motion of the femoral head within the acetabular cup during weight-bearing activities for subjects implanted with either a metal-on-polyethylene (MOP), metal-on-metal (MOM) or ceramic-on-ceramic (COC) THA. This was the first study to apply sound analysis as an impulse excitation technique for testing hip conditions and for measuring femoral head sliding in the acetabular component of human hip joints by acoustic means. Unfortunately, no studies have been conducted to compare the in vivo kinematics and sound for subjects implanted using various surgical approaches. It could be hypothesized that subjects having various surgical approaches could lead to an increase or reduction of in vivo hip separation. Therefore, the objective of this study is to analyze a total of 30 subjects implanted with either an anterior (10 patients), anterior-lateral (10 patients), or posterior-lateral (10 patients) surgical approach to determine if any of these surgical approaches leads to less or more in vivo hip separation. All subjects will be analyzed under in vivo weight-bearing conditions using video fluoroscopy to determine in vivo motion.
Strength and Strength-ratio of Hip Rotator Muscles at Soccer Players
Hip InjuriesMuscular Atrophy1 moreAt this investigation we want to find out whether there is a difference in muscle strength of the internal and external rotation hip muscles between soccer players and non-soccer players caused by typical movement patterns seen in soccer sport.
MIDAS: Minimal-dataset for the Assessment of Surgical Outcomes - Potential in Hip Surgery
Hip InjuriesSwiss legislation requires health service providers to collect such information. of medical quality indicators as part of the quality and performance audit (Article 22a KVG). In addition, comparisons of clinics or specialist specialists on cost and quality of results are required (Art. 49 (8)). Currently, the quality of a medical therapy is evaluated rather negatively on the absence (or occurrence) of complications. In contrast, however, the goal of therapy must be to improve or maintain the health-related quality of life (HRQoL). Accordingly, the Swiss Society of Surgery (SGC-SSC), in collaboration with the Association for Quality Assurance in Surgery (AQC), has developed a minimum dataset designed to assess the quality of life of patients after surgical intervention. In order to enable Switzerland to be comparatively independent of the discipline, generic (in the Research Plan - MIDAS -V2, date 24.05.2017 Page 5/57 Contrary to disease-specific) survey instruments proposed that cover the general quality of life in its different facets, regardless of the function of individual organ systems. The complication documentation was not completely abandoned in this proposal, but is only a quality indicator among many due to patient-related outcome measurements. However, the development of a minimal data set with quality indicators that are applicable across all surgical sub-disciplines for evaluating the quality of treatment of acute and chronic diseases raises a number of fundamental questions that can only be answered to a limited extent without empirical studies. Five essential questions are: I. Is it sufficient to work with generic quality of life tools or is it necessary to use disease / indication specific instruments or functional tests? II. Which is the best, solid time for a follow-up? III. Is it possible and useful to make a third-party determination of the quality of life in patients with limited cognitive abilities? IV. Which preoperative risk factors should be documented so that sufficient adjustment for case mix differences in hospital comparisons can be made? V. Which perioperative and postoperative factors, in particular complications, must be raised beyond the quality of life, as they reflect an independent aspect of quality?
THA Kinematics and Sound for Subjects for Normal, Diseased and Implanted Hips
Hip InjuriesThe objective of this study is to analyze subjects having a normal hip and compare the in vivo kinematics to subjects requiring a total hip arthroplasty (THA) due to having a diseased hip and then later post-operative to their implanted hip. Ten subjects will have a normal hip, ten hips will be diseased, requiring a THA and then those ten diseased hips will be re-analyzed at least six months post-operatively after implantation of a THA.
Hip Peak Torque in Running and Jumping Activities in Healthy Active Subjects
Hip InjuriesHip-related groin pain is common in sports that involves change of direction, kicks and sprint accelerations such as football, ishockey, tennis and basketball. Groin pain symptoms either pre- or post-treatment may be load-related, there is limited information on how different sporting activities affect hip joint loading. Thus, the purpose of this explorative cross-sectional study is to investigate hip peak torque in running and jumping activities in healthy active subjects. Such information may guide furture rehabilitation strategies and return to sport sport criteria. Twenty healthy subjects from the Capital Region of Denmark with an age of 18-40 will be included. Hip joint kinetics and kinamatics will be obtained during the following activities for each subjects: Walking Jogging (8-11 km/h) Maximal 6 meters sprint acceleration Single leg drop jump from 35 cm height Horizontal jump with single leg landing with a distance of 100% and 150% of leg length Maximal change of direction at 45, 135, 180 degrees Single-leg cross-country skiing exercise
Analysis of Different Hip Adductors Exercises
Injury of Hip and ThighGroin injuries present a major problem in sports due to its high frequency, long-lasting symptoms and high risk of re-injury. The most common groin injury is the adductor strain (around two thirds of all groin injuries), while the biggest risk factors are previous injury and lower hip adductors strength. The purpose of this study is to present and biomechanically evaluate several new strengthening exercises targeting hip adductors. Exercises will be performed with the use of our novelty device, which enables eccentric strengthening of the hip adductors in different hip and knee positions. We hypothesize that performing modified hip adductors exercises using the novelty device could enable participants to perform hip adduction throughout larger ROM during eccentric contractions, while changing hip and/or knee angle will differently affect muscle activity and produced joint torques. The latter could be helpful for preventive or rehabilitative training for hip adductors strain injuries, in which therapists want to target specific hip adductor muscle.
Retrospective Assessment of the Morphology of Acetabular Defects: A 3D Reconstruction Approach
Hip ArthrosisHip InjuriesIn this study, we aim to develop a statistical shape model and use it to reconstruct the shape of acetabula with severe defects (Paprosky 3a-3b). This will allow us to visualise and assess the morphology of the missing bone. In future studies we will use the obtained results to improve the design of acetabular implants for revision surgery.