Midterm Outcome of Cementless Total Hip Arthroplasty in Crowe IV-Hartofilakidis Type III Developmental Dysplasia of the Hip.
BACKGROUND
Developmental dysplasia of the hip (DDH) is widespread in developing countries, and treating Crowe IV-Hartofilakidis Type III DDH in adults requires the use of a highly demanding technique.


METHODS
We sought to determine the outcome of cementless total hip arthroplasty using Zweymüller components to treat Crowe IV-Hartofilakidis Type III DDH. Fifty-eight patients (71 hips) with a mean age of 35.8 years at time of index operation were included in our study. The average duration of follow-up was 70.5 months. The acetabular component was placed in the true acetabulum in all cases, and subtrochanteric shortening osteotomy was performed in 61 hips.


RESULTS
With any component revision for any reason as the end point, Kaplan-Meier survivorship analysis at 98 months revealed a cumulative survival rate for implanted components of 91.40%. The mean Harris Hip Score improved from 35.6 preoperatively to 82.9 postoperatively. There were 20 cases of intraoperative fracture, 1 case of complete nerve palsy, and 7 cases of transient nerve palsy. Revision surgery was performed in 7 patients because of cup loosening in 1, severe polyethylene wear in 4, cup breakage in 1, and dislocation in 1.


CONCLUSIONS
Midterm results for cementless total hip arthroplasty in patients with Crowe IV-Hartofilakidis Type III DDH was satisfactory; however, intraoperative fracture and polyethylene wear were major complications.
['Mu|Wenbo|W|', 'Yang|Desheng|D|', 'Xu|Boyong|B|', 'Mamtimin|Askar|A|', 'Guo|Wentao|W|', 'Cao|Li|L|']
D000077:Acetabulum D000293:Adolescent D000328:Adult D019644:Arthroplasty, Replacement, Hip D005260:Female D006618:Hip Dislocation, Congenital D006622:Hip Prosthesis D006801:Humans D007870:Leg Length Inequality D008297:Male D008875:Middle Aged D010027:Osteotomy D057068:Periprosthetic Fractures D011475:Prosthesis Failure D011859:Radiography D012086:Reoperation D016896:Treatment Outcome D055815:Young Adult
midterm outcome total hip arthroplasty intraoperative fracture crowe IV–hartofilakidis type III developmental dysplasia of the hip