Hydroxyapatite and tricalcium phosphate–coated cups with and without screw fixation

Thanner, Jonas; Kärrholm, Johan; Herberts, Peter; Malchau, Henrik

doi:10.1054/arth.2000.2963

Cited by 57 publications

(63 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The acetabular component showed continued migration in both groups, from 3 months up to 1 year postoperatively. The same migration pattern in the first year has been found by other authors in studies on various uncemented acetabular components (Thanner et al 2000, Digas et al 2004. We believe that the migration pattern of the ABG sockets studied by us corresponds to those previously observed for other designs.…”

Section: Discussionsupporting

confidence: 90%

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

et al. 2007

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 90%

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

et al. 2007

View full text Add to dashboard Cite

“…We used reflection all-polyethylene cups (Smith & Nephew, Memphis, TN) manufactured using the ram-extrusion technique and sterilized with ethylene oxide (EtO). All hips in the uncemented groups were operated with a porous press-fit cup with additional HA/TCP coating (Trilogy; Zimmer Inc., Warsaw, IN) (Thanner et al 2000, Digas et al 2003. Additional fixation with 1 screw was done in 1 hip; 28 cups had 2 screws and the remaining 8 had 3 screws inserted in the 3 screw holes available.…”

Section: Patientsmentioning

confidence: 99%

Different loss of BMD using uncemented press-fit and whole polyethylene cups fixed with cement: Repeated DXA studies in 96 hips randomized to 3 types of fixation

2006

View full text Add to dashboard Cite

Background In cemented THA, aseptic loosening of the cup is more common than loosening of the stem, while periprosthetic osteolysis of the socket resulting in difficult reconstruction problems has emerged as the most significant problem with cementless cup fixation.Patients and methods 90 patients (96 hips) scheduled for THA were stratified in three groups according to the method of fixation of the acetabular component: acrylic bone cement with fluoride (Cemex-F), porous-coated press-fit cup with ceramic coating (Trilogy, uncemented) and acrylic cement with gentamicin (Palacos). All patients received the Spectron EF stem. Acetabular bone mineral density was measured with dual-energy X-ray absorptiometry (DXA) 1 week postoperatively, and after 12 and 24 months. The periprosthetic BMD was evaluated in 5 ROIs positioned around the acetabular component.Results In the uncemented sockets, the BMD had decreased proximally and medially to the cup after 2 years. The difference was significant in the proximal region as compared to the control group (Palacos). No difference was noted between the 2 groups with cemented components after 2 years. Stepwise linear regression analysis showed that loss of periprosthetic BMD in the proximal high-pressure region after 2 years increased with higher postoperative BMD and when the uncemented design had been used. Interpretation Contrary to previous studies of cemented stems, the use of fluoride cement did not influence the periprosthetic BMD 2 years after the examination. Increased loss of BMD with use of uncemented press-fit cups in the region in which osteolytic lesions are commonly found suggests that stress shielding may initiate the development of this complication. Longer

show abstract

“…Many experimental deposition processes have been investigated, including plasma spraying, sputtering, pulsed laser deposition, dip coating, sol-gel and electrophoretic deposition. 11) Among these processes, the plasma spraying [12][13][14][15][16][17][18][19][20][21] has advantages of high deposition rates with sufficiently low cost, and then, titanium dental implants are widely coated with HAp by using plasma spraying. 22) The plasma-sprayed calcium phosphate coatings, however, show poor adherence to the metal substrate and nonuniformity which limits a critical thickness to ensure complete coverage.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Calcium Phosphate Films by Radiofrequency Magnetron Sputtering

et al. 2005

View full text Add to dashboard Cite

Calcium phosphate films were prepared on titanium substrates by radiofrequency (RF) magnetron sputtering at RF powers from 75 to 150 W. Hot-pressed -tricalcium phosphate (-TCP) plates with a high density (>99:6%) were used as a sputtering target. The substrate was not intentionally heated. The films consisted of amorphous calcium phosphate and oxyapatite (Ca 10 (PO 4 ) 6 O) phases. The ratio of the oxyapatite phase depended on the sputtering conditions of RF power, oxygen gas concentration in the sputtering gas (C O2 ) and total pressure in the chamber. The (002) preferred orientation of oxyapatite phase was observed. The deposition rate of films increased with increasing RF power and decreasing C O2 . The highest deposition rate was 0.143 nmÁs À1 (0.515 mmÁh À1 ).

show abstract

Hydroxyapatite and tricalcium phosphate–coated cups with and without screw fixation

Cited by 57 publications

References 24 publications

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

Different loss of BMD using uncemented press-fit and whole polyethylene cups fixed with cement: Repeated DXA studies in 96 hips randomized to 3 types of fixation

Preparation of Calcium Phosphate Films by Radiofrequency Magnetron Sputtering

Contact Info

Product

Resources

About