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Koji Goto, Yuki Furuya, Kazuhiro Oda, Ryosuke Minami, Kaori Sano, Masayuki Sugimoto, Shuichi Matsuda
BACKGROUND: The Elite-Plus stem has two shape variations: roundback and flanged. The correlation between the radiographic results and stem geometry has not been previously investigated. The objective of this study was to evaluate the long-term primary total hip arthroplasty results using Elite-Plus stems, and the effect of stem geometry on radiographic distal femoral cortical hypertrophy. METHODS: We retrospectively evaluated, radiographically, 156 patients (173 hips) who underwent total hip arthroplasty between April 1998 and November 2005, and were followed up for >5 years, postoperatively...
March 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Neil A Tayyab, Dino Samartzis, Haluk Altiok, Charles E Shuff, John P Lubicky, Jean Herman, Nitin Khanna
STUDY DESIGN: A prospective, radiographic cohort study. OBJECTIVES: This study assessed the radiographic reliability and diagnostic value of the vertebral wedge ratio (WR) to the more segmental Cobb angle (CA) regarding sagittal spine deformities. SUMMARY OF BACKGROUND DATA: The use of the CA has been used to assist in the radiographic diagnosis of various sagittal spine deformities. However, the reliability and diagnostic aptitude of the CA remains speculative and may not be as receptive to individual variations of vertebral integrity in sagittal spine deformities...
July 15, 2007: Spine
A Ramos, F Fonseca, J A Simões
The determination of biomechanical force systems of implanted femurs to obtain adequate strain measurements has been neglected in many published studies. Due to geometric alterations induced by surgery and those inherent to the design of the prosthesis, the loading system changes because the lever arms are modified. This paper discusses the determination of adequate loading of the implanted femur based on the intact femur-loading configuration. Four reconstructions with Lubinus SPII, Charnley Roundback, Muller Straight and Stanmore prostheses were used in the study...
August 2006: Journal of Biomechanical Engineering
D Janssen, R Aquarius, J Stolk, N Verdonschot
The Capital Hip implant was a Charnley-based system which included a flanged and a roundback stem, both of which were available in stainless steel and titanium. The system was withdrawn from the market because of its inferior performance. However, all four of the designs did not produce poor rates of survival. Using a simulated-based, finite-element analysis, we have analysed the Capital Hip system. Our aim was to investigate whether our simulation was able to detect differences which could account for the varying survival between the Capital Hip designs, thereby further validating the simulation...
November 2005: Journal of Bone and Joint Surgery. British Volume
O Boachie-Adjei, B Lonner
Spinal deformity in children has a wide range of causes. The most common entities are idiopathic scoliosis, postural roundback, and Scheuermann's kyphosis. The pediatrician, primary care physician, and orthopedic surgeon can optimally treat these disorders with close observation, attention to detail, initiation of bracing when indicated, and surgery on patients who have an appropriate indication. A careful, well-planned approach to these conditions results in the successful treatment of spinal deformities with minimal complications...
August 1996: Pediatric Clinics of North America
H Mau
In order to avoid overtreatment or undertreatment of a beginning scoliosis early differentiation of the clinically unimportant concomitant scoliosis of Scheuermann's disease is essential as against early idiopathic scoliosis, spondyloepiphyseal dysplasia and the fixed round back deformity of adolescents. Scheuermann's scoliosis as opposed to idiopathic scoliosis is characterised by the almost complete lack of vertebral rotation (as with spondyloepiphyseal dysplasia), by a localized unilateral narrowing of the intervertebral space in the a...
February 1982: Zeitschrift Für Orthopädie und Ihre Grenzgebiete
D S Bradford, J H Moe, F J Montalvo, R B Winter
No abstract text is available yet for this article.
June 1974: Journal of Bone and Joint Surgery. American Volume
D S Bradford, J H Moe, R B Winter
No abstract text is available yet for this article.
February 1973: Minnesota Medicine
T C Taylor, D R Wenger, J Stephen, R Gillespie, W P Bobechko
Twenty-seven patients of a group of twenty-nine who underwent posterior spine fusion using Harrington compression instrumentation for Scheuermann's disease or postural roundback deformity were reviewed with a mean follow-up of 27.6 months. The mean curve before operation was 72 degrees and at review, 46.1 degrees. The mean loss of correction in the fusion from initial examination to final follow-up was 5.7 degrees. This procedure can achieve satisfactory correction of deformity as well as pain relief. We think that Harrington compression instrumentation and spine fusion is indicated in selected cases of roundback deformity...
June 1979: Journal of Bone and Joint Surgery. American Volume
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