Porous titanium construct cup compared to porous coated titanium cup in total hip arthroplasty. A randomised controlled trial.
Int Orthop
; 39(5): 823-32, 2015 May.
Article
in En
| MEDLINE
| ID: mdl-25338110
PURPOSE: The purpose of this study was to determine if a new titanium cup with increased porosity resulted in different periacetabular bone loss and migration compared to a porous coated cup. METHODS: Fifty-one patients with primary hip osteoarthritis were randomized to either a cup with porous titanium construct backside (porous titanium group, n = 25) or a conventional porous coated titanium cup (control group, n = 26). The primary outcome variable was change in periacetabular bone mineral density two years after surgery measured with dual energy X-ray absorptiometry (DXA). Secondary outcomes were implant fixation measured with radiostereometry (RSA) and clinical outcome scores. RESULTS: The pattern of bone remodelling was similar in the two groups with almost complete restoration to baseline values. BMD diminished in the two proximal zones and increased in the two distal zones. After minimal migration up to six months all implants in both groups became stable. We found no difference between the two groups in clinical outcome scores. CONCLUSIONS: In this prospective, randomized, controlled trial on a new porous titanium cup we found, compared to the control group, no clinically relevant differences regarding periacetabular bone preservation, implant fixation or clinical outcome up to two years postoperatively.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Prosthesis Design
/
Hip Prosthesis
Type of study:
Clinical_trials
/
Observational_studies
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Int Orthop
Year:
2015
Document type:
Article
Affiliation country:
Sweden
Country of publication:
Germany