Total hip arthroplasty (THA) is one of the most common andclinically successfulorthopedic surgeries aimedto eliminate painand improve walking functionin patients with osteoarthritisof III–IV stages. Low mineralbone density (BMD) affectsthe survivorship implants after THA and may cause longrecoveryterms. Objective. Analyze results in patientswith normal andlow BMD within a year surgery. Methods....

OBJECTIVES Bony impingement of the proximal femur on the pelvis is an important factor for dislocation after total hip arthroplasty (THA). We evaluated bony impingement after THA using the rotation matrix derived from postoperative computed tomography (CT) images. PATIENTS AND METHODS One hundred and seven hip joints were subjected to primary THA via a posterolateral approach. We used the rot...

We prospectively measured functional performances (Western Ontario and McMaster Universities Osteoarthritis Index, Short Form-36, 2-minute walk test, and timed get-up-and-go test) of patients who underwent total hip arthroplasty (THA) and had serum vitamin D levels tested during the preoperative evaluation. Of 219 patients, 102 (46.6%) had low vitamin D levels (25-hydroxyvitamin D<30 ng/mL). Lo...

7 List of papers 8 Statement 9 Abbreviations 10 Introduction 11 Internal fixation 11 Hemiarthroplasty (HA) 13 Total hip arthroplasty (THA) 14 Comparative studies between HA and THA 14 Comparative studies between internal fixation and arthroplasty 15 Heterotopic ossification 17 Nutritional status and intervention 17 Cost analyses 17 Summary of introduction 18 Aims 19 Patients and methods Patient...

BACKGROUND Acetabular component orientation influences joint stability in total hip arthroplasty (THA). The purpose of this study was to evaluate the effect of cup orientation and other variables on hip dislocation risk and to define a posterior approach specific safe zone. METHODS A cohort of 1289 posterior approach primary THA cases was prospectively followed and component position measured...

A 30-GS/sec CMOS track and hold amplifier (THA) is designed and fabricated in a 0.13-μm technology. The chip operates from a 1.8-V supply and consumes 270 mW. The THA employs a low noise TIA input stage and a switched source follower (SSF) track and hold block. The SSF topology overcomes the shortcomings of switched series transistors by eliminating the use of a series switch all together. The ...

The following are lessons of 30 years of total hip arthroplasty (THA): Prosthetic components should allow for easy preoperative graphic planning with one or two templates only. Polyethylene is the weak link in THA and ought to be replaced by perfectly concentric metallic sockets and femoral heads of casted Cr/Co/Mo alloys. The operating technique should guarantee large exposure, suitable orient...

Infection rates in primary (first-time) major joint arthroplasty continue to be a significant issue. The effect of antibiotic and antiseptic prophylaxis on outcomes for this type of surgery has not been adequately reviewed. A systematic search of the main databases for randomized controlled trials (RCTs) evaluating antibiotics and antiseptics was conducted to evaluate the predetermined endpoint...

The direct anterior (DA) approach for total hip arthroplasty (THA) has demonstrated successful short term outcomes in several studies. However, there is no consensus about which patients are appropriate candidates for DA total hip arthroplasty. It is also unclear if short term outcomes in obese patients undergoing THA through a DA approach are elevated in comparison to non-obese patients. The p...