Bahl JS, Nelson MJ, Taylor M, Solomon LB, Arnold JB, Thewlis D Biomechanical changes and recovery of gait function after total hip arthroplasty for osteoarthritis: a systematic review and meta-analysis. Osteoarthritis Cartilage. 2018 Jul;26(7):847-863. doi: 10.1016/j.joca.2018.02.897. Epub 2018 Feb 21.
Beaulieu ML, Lamontagne M, Beaulé PE Lower limb biomechanics during gait do not return to normal following total hip arthroplasty. Gait Posture. 2010 Jun;32(2):269-73. doi: 10.1016/j.gaitpost.2010.05.007. Epub 2010 Jun 11.
Bennett D, Ryan P, O'Brien S, Beverland DE Gait kinetics of total hip replacement patients-A large scale, long-term follow-up study. Gait Posture. 2017 Mar;53:173-178. doi: 10.1016/j.gaitpost.2017.01.014. Epub 2017 Jan 21.
Dorr LD, Maheshwari AV, Long WT, Wan Z, Sirianni LE Early pain relief and function after posterior minimally invasive and conventional total hip arthroplasty. A prospective, randomized, blinded study. J Bone Joint Surg Am. 2007 Jun;89(6):1153-60.
Ewen AM, Stewart S, St Clair Gibson A, Kashyap SN, Caplan N Post-operative gait analysis in total hip replacement patients-a review of current literature and meta-analysis. Gait Posture. 2012 May;36(1):1-6. doi: 10.1016/j.gaitpost.2011.12.024. Epub 2012 Mar 10. Review.
Lamontagne M, Beaulieu ML, Varin D, Beaulé PE Lower-limb joint mechanics after total hip arthroplasty during sitting and standing tasks. J Orthop Res. 2012 Oct;30(10):1611-7. doi: 10.1002/jor.22127. Epub 2012 Apr 16.
Longworth JA, Chlosta S, Foucher KC Inter-joint coordination of kinematics and kinetics before and after total hip arthroplasty compared to asymptomatic subjects. J Biomech. 2018 Apr 27;72:180-186. doi: 10.1016/j.jbiomech.2018.03.015. Epub 2018 Mar 16.
Lübbeke A, Katz JN, Perneger TV, Hoffmeyer P Primary and revision hip arthroplasty: 5-year outcomes and influence of age and comorbidity. J Rheumatol. 2007 Feb;34(2):394-400. Epub 2006 Nov 15.
Mariconda M, Galasso O, Costa GG, Recano P, Cerbasi S Quality of life and functionality after total hip arthroplasty: a long-term follow-up study. BMC Musculoskelet Disord. 2011 Oct 6;12:222. doi: 10.1186/1471-2474-12-222.
Mayr E, Nogler M, Benedetti MG, Kessler O, Reinthaler A, Krismer M, Leardini A A prospective randomized assessment of earlier functional recovery in THA patients treated by minimally invasive direct anterior approach: a gait analysis study. Clin Biomech (Bristol, Avon). 2009 Dec;24(10):812-8. doi: 10.1016/j.clinbiomech.2009.07.010. Epub 2009 Aug 21.
Nilsdotter AK, Isaksson F Patient relevant outcome 7 years after total hip replacement for OA - a prospective study. BMC Musculoskelet Disord. 2010 Mar 11;11:47. doi: 10.1186/1471-2474-11-47.
Pabinger C, Lothaller H, Portner N, Geissler A Projections of hip arthroplasty in OECD countries up to 2050. Hip Int. 2018 Sep;28(5):498-506. doi: 10.1177/1120700018757940. Epub 2018 May 21.
Palan J, Manktelow A Surgical approaches for primary total hip replacement. Orthopaedics and Trauma. 2018;32(1):1-12.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.