tha kinematics and sound for subjects for normal, diseased and implanted hips

Conditions: Hip Injuries

Summary: the 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.


Eligibility criteria:
inclusion criteria for diseased/implanted subjects: * subjects will require a tha and will be implanted with either summit/pinnacle tha or corail/pinnacle tha. * patients must be at least six months post-operative with no other surgical procedures conducted within the past six months that will prohibit them from performing the study activities. * patients must be between 40-85 years of age. * potential subjects will have a body weight of less than 250 lbs. * participants must have body mass index (bmi) of less than 38. * potential subjects' thas should be judged clinically successful with a hhs \>90. * subjects must have demonstrated no evidence of post-operative hip subluxation or dislocation. * subjects must not walk with a detectable limp and must be able to actively abduct their operated hip against gravity without difficulty. * participants must be able to walk on level ground, ascend and descend a ramp and rise from a chair without assistance. * patients from the physician's list who do not meet the study requirements will not be considered. * patients must be willing to sign the informed consent (ic)/hipaa form to participate in the study. exclusion criteria for diseased/implanted subjects: * pregnant, potentially pregnant or lactating females. to satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. a pregnant person will not be allowed to participate in the study. * subjects without one of the two types of required hip implants. * subjects who have had surgery within the past 6 months that would prohibit them from performing level walking, ascend and descend a ramp and rise from a chair without aid or support of any kind. * subjects who are unable to perform level walking, ascend and descend a ramp and rise from a chair without aid or support. * subjects with pain, functional deficits, or generalized inflammatory. * subjects who walk with a detectable limp. * subjects who cannot actively abduct their operated hip against gravity without difficulty. * subjects who are unwilling to sign ic/hipaa document. * subjects who have a hhs \<90. inclusion criteria for normal subjects: * patients must not have any kind of hip implant. * subjects must not have had any type of hip surgery or any pathological hip conditions, including osteoarthritis, or hip pain. * patients must be between the ages of 18 and 65. * potential subjects will have a body weight of less than 250 lbs. * participants must have bmi of less than 38. * pregnant or potentially pregnant females will be excluded from the study. to satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. a pregnant person will not be allowed to participate in the study. * participants must be able to walk on level ground, ascend and descend a ramp and rise from a chair without aid of any kind or have had any kind of surgical procedure within the past 6 months that would affect his/her ability to perform the study activities. * patients must be willing to sign the ic and hipaa forms to participate in the study. * patients must be between 160cm (5'3) and 193cm (6'4) tall exclusion criteria for normal subjects: * pregnant, potentially pregnant or lactating females. to satisfy radiation protocol, each female subject will be asked if she is pregnant, or possibly could be pregnant. a pregnant person will not be allowed to participate in the study * subjects with any kind of hip implant. * subjects who have had any past hip surgery, have pathological hip conditions and/or hip pain. * subjects who have had surgery within the past 6 months that would prohibit them from performing level walking, ascend and descend a ramp and rise from a chair without aid or support of any kind. * subjects who are unable to perform level walking, ascend and descend a ramp and rise from a chair without aid or support. * subjects who are unwilling to sign ic/hipaa document.

Keywords: total hip arthroplasty