How long is the femoral stem in a hip replacement?
These femurs were divided into three groups based on femoral stem length: short stem (SS), 12 to 14 cm; medium stem (MS), 20 to 24 cm; and long stem (LS), 25 to 35 cm. We reviewed reoperations, disease progression in the same femur, and complications.
What is femoral stem subsidence?
Femoral stem subsidence is the distalisation of the stem relative to the major trochanter. Two previous studies about cementless hemiarthroplasty in femoral neck patients found different results. Kabelitz et al8 found 12% intra-operative fractures and a low subsidence rate (5%).
What is a modular femoral stem?
Abstract. Background: Modular femoral stems are one option for revision THA surgeons and allow offset restoration, leg length discrepancy correction, and stability independent of distal stem fixation. The complexity of revision THA usually leads surgeons to use multiple revision hip designs to address these issues.
What is subsidence hip?
Introduction. Subsidence is a known reason for early failure of total hip arthroplasty (THA) [1, 2]. In particular, cementless THA might be vulnerable to migration [1]. Subsidence is defined as a femoral stem distalization in reference to the major trochanter (Fig. 1a, b).
What is stem loosening after hip replacement?
Stem loosening was defined as stem subsidence of ≥3 mm,4 radiolucencies of >2 mm or continuous at the bone-stem or bone-cement interface,5 progressive tilt of the stem, multiple small cavitations or large defects, or stem/cement fracture.
What is a modular stem?
This has not been our experience with the use of modular stems. Modular stem means that the stem has two or more parts that are connected by a mechanical junction. Almost all hip stems today feature a modular head, however that does not meet the current definition of a modular stem.
What is modular hip implant?
Background: Modular implants are medical devices which are used to restore mobility and relieve pain in case of arthritis or other hip injuries. A hip surgery may involve a total hip replacement[1] or a hip resurfacing.
What is the Tri-lock bone preservation stem?
The Tri-Lock Bone Preservation Stem is an uncemented tapered wedge design primary hip replacement stem. The original Tri-Lock was introduced in 1981 as the first proximally coated tapered-wedge hip stem available. Geometrical features which preserve bone include a reduced lateral shoulder and a thin antero-posterior profile.
Is tri-lock® DePuy safe for total hip arthroplasty?
Total hip arthroplasty using TRI-LOCK® DePuy bone preservation femoral stem: our experience According to us, this device is solid and safe, providing remarkable sparing of both soft tissues and bone stock. According to us, this device is solid and safe, providing remarkable sparing of both soft tissues and bone stock.
How do you select a femoral bone preservation stem?
Femoral Stem Selection The TRI-LOCK®Bone Preservation Stem is designed to achieve intimate cortical contact proximally at the medial and lateral endosteal cortices. Select the template size that fits the proximal femur and equalizes leg lengths.
Where should the femoral template be drawn?
The femoral template should be in line with the long axis of the femur, and the neck resection line drawn at the point where the selected stem provides the desired amount of leg length.