title: Mid-term results of an uncemented femoral stem with modular neck options.
abstract: We prospectively assessed the results of 239 primary total hip replacements performed using a conical stem combined with modular necks of different lengths and inclinations (Modulus System, Lima Corporate San Daniele Del Friuli, Udine, Italia) in 222 patients (50 men, 172 women), undergoing surgery between October 2001 and December 2006 and presenting with anatomical deformities of the proximal femur and/or acetabulum, including developmental dysplasia (DDH), ankylosis, and sequelae of osteotomies or fractures. Such conditions can make hip replacement problematic. The mean age at the time of surgery was 57.6 years (22 ÷ 83). No patients were lost to follow-up. 3 femoral components underwent revision. At a mean of 5 years follow-up the Harris Hip Score showed a significant improvement, increasing from 35 preoperatively to a mean of 96.6. Using Kaplan-Meier analysis the survival rate at 5 years was 98.28%. The Modulus stem showed good mid-term results in terms of survival, as well as clinical and radiographic outcome.
authors.affiliation: Clinica Ortopedica e Traumatologica, University of Pavia, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Benazzo
authors.forename: Stefano M P
authors.initials: SM
authors.lastname: Rossi
authors.forename: Davide
authors.initials: D
authors.lastname: Cecconi
authors.forename: Lucio
authors.initials: L
authors.lastname: Piovani
authors.forename: Flavio
authors.initials: F
authors.lastname: Ravasi
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D002484:Cementation; D005260:Female; D006305:Health Status Indicators; D006621:Hip Joint / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D016916:Joint Deformities, Acquired / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D016896:Treatment Outcome; D055815:Young Adult