-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
The sleeve has a bone ingrowth surface and connects to the central stem via a modular junction. The femoral neck version can be oriented completely independent of the sleeve, but, if a curved stem is chosen, the version of the neck is dependent on the anterior bow of the femur. Neck version and height are not completely independent of the ...
به خواندن ادامه دهید
Moreover, a modular neck allows changes of the neck without the removal of well-fixed stems in revision surgery 2). On the other hand, disadvantages have been identified when using modular necks including corrosion, metallosis 3), modular neck fracture 4) and others at the second taper junction. This study aimed to investigate the need for and ...
به خواندن ادامه دهید
Abstract and Figures. An 81-year-old woman presented with progressive groin pain after metal-on-polyethylene total hip arthroplasty with a modular neck stem and was found to have adverse local ...
به خواندن ادامه دهید
The development of femoral modularity, and a classification system, is described. The theoretical rationale for modularity is summarised and the clinical outcomes are …
به خواندن ادامه دهید
The femoral component was a SCL Contact fluted stem size 3 that was designed to accept a modular Morse-tapered neck, including a modular medium size neck and a 32-mm diameter, + 4 mm long alumina head (Lima-Lto, Villanova, Italy). Both stem and neck were made of titanium alloy (Ti6Al4V).
به خواندن ادامه دهید
We performed a survival analysis with the endpoint defined as revision total hip arthroplasty due to neck-stem corrosion. Results: We revised 41 hips (22.0%) for neck-stem …
به خواندن ادامه دهید
From 2010 onwards, there is an increasing amount of scholarly articles reporting dual modular stem design prosthesis failure, starting in the form of case reports, where sudden fractures of the modular neck at the neck-stem junction were reported as early as two years after implantation [9,10,11,12]. Atwood et al. reported on fractures of ...
به خواندن ادامه دهید
The prosthesis used was a bi-modular Zimmer M/L Taper size 9 stem with a Kinectiv Technology modular neck made of titanium alloy (Ti6Al4V) with a 12/14 taper modular head-neck junction [12]. The shell was a size 60 Zimmer Continuum with a Longevity highly cross-linked polyethylene liner; the head was a size 40 made of cobalt …
به خواندن ادامه دهید
The analysis with aseptic revision of the femoral stem as the end point for failure showed a survival rate of 85%, with a mean followup of 50 months (range, 1–125 months) (95% CI, 96–111 months) for the PROFEMUR ® E femoral stem and 85% (95% CI, 74–87 months) for the PROFEMUR ® Z stem (Fig. 1 ) (p = 0.587). The log rank test did …
به خواندن ادامه دهید
The Wright Medical Profemur stem includes an additional component from a standard hip replacement, a modular neck. This neck connects the head or ball with the stem that is implanted into the patient's femur. There are 4 types of Wright Medical Profemur stems that utilize these modular necks that have experienced fractures:
به خواندن ادامه دهید
Modular neck femoral stem (MNFS) for total hip arthroplasty (THA) was introduced to optimize the outcome, but created concerns about pain, elevated blood metal ion levels, and adverse reaction to metal …
به خواندن ادامه دهید
Hip stem and hip neck fractures were well-known complications of total hip arthroplasty (THA) in the past [ 1 – 4 ]. Better quality stainless steel and the use of cobalt-chromium stems reduced this problem. However, after the introduction of modularity, neck fractures are again a growing field of interest.
به خواندن ادامه دهید
The ABG II dual modular hip system is associated with a high rate of early failure secondary to fretting and corrosion at the femoral neck-stem taper and surgeons using modular hip systems with a titanium stem and cobalt-chromium neck should be vigilant about annual follow-up with radiographs, and use of MRIs as indicated. …
به خواندن ادامه دهید
In a modular neck-stem there is a a calcar spout and a series of internal collars to enhance 'double taper' as the trunnion of the distal part of the neck bone–implant contact were added. In 1985, the first modu- engages with a bore created within the stem, as well as the lar-neck stem (with junctions at head–neck and neck–stem ...
به خواندن ادامه دهید
The prosthesis used was a bi-modular Zimmer M/L Taper size 9 stem with a Kinectiv Technology modular neck made of titanium alloy (Ti6Al4V) with a 12/14 taper modular head-neck junction . The shell was a size 60 Zimmer Continuum with a Longevity highly cross-linked polyethylene liner; the head was a size 40 made of cobalt chrome …
به خواندن ادامه دهید
Management of a patient with a painful dual taper modular neck stem THA presenting with elevated metal ion levels and evidence of adverse local tissue reactions (pseudotumors) with bone or muscle …
به خواندن ادامه دهید
In this report, the literature regarding one of the most popular bi-modular stems with specific neck-stem coupling (oval Morse taper) is reviewed and illustrated …
به خواندن ادامه دهید
The Optimal ® uncemented modular neck stem seems to provide a satisfactory survival and satisfactory clinical outcomes at 5 years, with no noticeable adverse effects resulting from the additional modular junction. In this series, neck modularity enabled restoration of patient-specific femoral offset and limb length, though greater follow-up is ...
به خواندن ادامه دهید
From 2010 onwards, there is an increasing number of articles reporting dual modular stem design prosthesis failure, where sudden fractures of the modular neck at the neck-stem junction were reported as early as first years after implantation 24 – 26. The reasons for a modular neck fracture of a Ti alloy are multifactorial 26.
به خواندن ادامه دهید
Stryker hip implant recalls occurred after reports revealed fretting, corrosion and other complications in patients implanted with the devices. The hip manufacturer's biggest recalls involved Rejuvenate and ABG II Modular stems and LFIT V40 femoral heads. As a result of Stryker's hip recalls, thousands have filed lawsuits against the ...
به خواندن ادامه دهید
The 7-year survival rate was 72% for ABG II Modular-Neck Stem, using revision THA due to neck-stem corrosion as an endpoint. Our mid-term study also showed (as did the study by Vundelinckx et al [Vundelinckx B.J. Verhelst L.A. De Schepper J. Taper corrosion in modular hip prostheses: analysis of serum metal ions in 19 patients.
به خواندن ادامه دهید
The MN design allows surgeons to choose the appropriate degree and length of the neck for desired stability and range of motion. Cite this article: EFORT Open Rev …
به خواندن ادامه دهید
Both the femoral stem and the modular neck are manufactured from a titanium alloy (Ti-6Al-4V). The patient had a 56-mm head with a –3.5-mm neck length. The neck geometry was a long varus anteverted neck (AR/VV2). The patient was otherwise healthy. The postoperative course was uneventful, and he was pain-free within three months after the ...
به خواندن ادامه دهید
Degradation at the modular head-neck interface in total hip arthroplasty (THA) is predominately expressed in the form of corrosion and fretting, potentially causing peri-prosthetic failure by ...
به خواندن ادامه دهید
Typical hip implant systems include a one-piece neck and stem called a monoblock design. Stryker's ABG II system had eight right stems, eight left stems and 10 modular necks. Stryker's Rejuvenate hip featured six stems and 16 necks.
به خواندن ادامه دهید
The neck-stem taper junctions showed severe corrosion in the majority of cases, with a median score of 4 and range from 3 to 4 for both neck and stem taper surfaces. Extensive black areas, discoloration, and changes in surface roughness were common features observed in our cohort (Fig. (Fig.1). 1 ).
به خواندن ادامه دهید
The rejuvenate modular-neck stem implant was recalled in 2012 due to high revision rates . Meftah et al. suggested that the metallurgy mismatch between the cobalt-chromium modular neck in conjunction with the titanium-molybdenum-zirconium-iron stem caused fretting corrosion at the interface leading to a release of metal ions . Walsh et al ...
به خواندن ادامه دهید
However, corrosion at stem modular junctions has been observed, resulting in adverse local tissue reaction (ALTR), a thick-walled collection of predominantly lymphocytic infiltrate that can be destructive to surrounding tissues [1]. ALTR secondary to head-neck taper corrosion in cobalt (Co)-chromium (Cr) alloy and titanium (Ti) alloy …
به خواندن ادامه دهید
A modular neck–stem has been shown to produce. a better outcome and range of movement with reduced. rates of osteolysis compared with a standard uncemented. stem in patients with dysplasia. 40
به خواندن ادامه دهید
Total hip arthroplasty (THA) using a modular-neck stem offers the surgeon additional options to restore the patient's anatomy, such as being able to adjust femoral offset and leg length independently from …
به خواندن ادامه دهید