Affiliations: [a] Department of Orthopaedic Surgery, Hannover Medical School, Hannover, Germany | [b] Center for Hip, Knee and Foot Surgery, Sports Traumatology, ATOS Hospital, Heidelberg, Germany | [c] Department of Orthopaedic and Trauma Surgery, University Hospital of Cologne, Cologne, Germany
Correspondence:
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Corresponding author: Stefan Budde, Department of Orthopaedic Surgery, Anna-von-Borries-Str. 1-7, 30625 Hannover, Germany. Tel.: +49 511 5354 529; Fax: +49 511 5354 682; E-mail:stefan.budde@ddh-gruppe.de
Abstract: BACKGROUND: Short-stem implants are routinely used for total hip
arthroplasty in younger patients that are more likely to have secondary
osteoarthritis than older patients. OBJECTIVE: To investigate the applicability of short-stem hip implants for
secondary osteoarthritis due to developmental dysplasia of the hip. METHODS: This study analyzed the clinical and radiological results of
patients with developmental dysplasia of the hip (DDH, 58 hips) and compared
them to those of patients with primary osteoarthritis (POA, 59 hips) treated
with the metaphyseal total hip arthroplasty (Metha®) short
stem with metaphyseal fixation. RESULTS: The mean clinical and radiological follow-up periods were 2.9 ±
1.1 years and 3.8 ± 1.9 years, respectively. The mean Harris Hip
Score (HHS) significantly increased in both groups over this period
(p< 0.0001). The caput-collum-diaphysis (CCD) angle was significantly lower
in the POA group prior to surgery and significantly increased in the POA and
and decreased in DDH groups, respectively. The preoperative femoral offset
was lower in the DDH group and increased significantly after surgery. CONCLUSIONS: The Metha® short stem in patients with DDH allows
good reconstruction of joint biomechanics with a good clinical outcome.
Keywords: Developmental dysplasia, short stem, total hip arthroplasty
