Latest journal articles about musculoskeletal tumors, prosthetics and orthotics from Prosthetics and Orthotics International, The Bone & Joint Journal, Journal of Bone and Joint Surgery, Clinical Orthopaedics and Related Research, Acta Orthopaedica, Orthopedic Clinics of North, America, Journal of Orthopaedic Surgery and Research, Orthopedics
BACKGROUND: Tumor-induced osteomalacia is a rare and fascinating paraneoplastic syndrome usually caused by a small, benign phosphaturic mesenchymal tumor. Most tumors are treated surgically, but we are unaware of any reports that compare the results of curettage and segmental resection for lesions in long bones.
METHODS: Seventeen patients (ten male and seven female) with tumor-induced osteomalacia lesions in long bones, who underwent surgical treatment from December 2004 to August 2013 in our hospital, were included in this retrospective study. The mean follow-up (and standard deviation) was 35 ± 27 months (range, twelve to 116 months). The characteristics of the tumor and the effects of different surgical treatments (curettage compared with segmental resection) were evaluated.
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Single point incremental forming of a facial implant.
Prosthet Orthot Int. 2013 Sep 17;
Authors: Araújo R, Teixeira P, Montanari L, Reis A, Silva MB, Martins PA
Abstract
Background:The investigation draws from the fundamentals of the mechanical behaviour of titanium grade 2 to the design and fabrication of facial implants by means of single point incremental forming.Objectives:To provide knowledge on the capabilities and limitations of a new manufacturing technology to fabricate low-cost, patient-specific medical implants.Study design:Rapid fabrication of a simplified model of a facial implant.Methods:Circle grid analysis and its graphical representation in the fracture forming limit diagram combined with finite element modelling are utilized to identify the failure limits and to assist the overall design of the facial implants.Results:Fabrication of facial implants without and with failure by cracking due to excessive thinning of the sheet from where the implant is to be cut.Conclusions:Identification of the major operative parameters that influence fabrication of sound facial implants by means of single point incremental forming.Clinical relevanceReduce the gap between production engineers and the medical community by presenting a state-of-the-art manufacturing technology to produce low-cost, patient-specific medical implants.
PMID: 24044972 [PubMed - as supplied by publisher]
Read more... http://www.ncbi.nlm.nih.gov/pubmed/24044972?dopt=Abstract
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What Is the Learning Curve for Robotic-assisted Pedicle Screw Placement in Spine Surgery?
Clin Orthop Relat Res. 2013 Sep 19;
Authors: Hu X, Lieberman IH
Abstract
BACKGROUND: Some early studies with robotic-assisted pedicle screw implantation have suggested these systems increase accuracy of screw placement. However, the relationship between the success rate of screw placement and the learning curve of this new technique has not been evaluated.
QUESTIONS/PURPOSES: We determined whether, as a function of surgeon experience, (1) the success rate of robotic-assisted pedicle screw placement improved, (2) the frequency of conversion from robotic to manual screw placement decreased, and (3) the frequency of malpositioned screws decreased.
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A scoping literature review of the provision of orthoses and prostheses in resource-limited environments 2000-2010. Part one: considerations for success.
Prosthet Orthot Int. 2013 Sep 11;
Authors: Ikeda AJ, M Grabowski A, Lindsley A, Sadeghi-Demneh E, Reisinger KD
Abstract
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Impact of hospital volume on postoperative complications and in-hospital mortality after musculoskeletal tumor surgery: analysis of a national administrative database.
J Bone Joint Surg Am. 2013 Sep 18;95(18):1684-91
Authors: Ogura K, Yasunaga H, Horiguchi H, Ohe K, Shinoda Y, Tanaka S, Kawano H
Abstract
BACKGROUND: We are aware of only one report describing the relationship between operative volume and outcomes in musculoskeletal tumor surgery, although numerous studies have described such relationships in other surgical procedures. The aim of the present study was to use a nationally representative inpatient database to evaluate the impact of hospital volume on the rates of postoperative complications and in-hospital mortality after musculoskeletal tumor surgery.
METHODS: We used the Japanese Diagnostic Procedure Combination administrative database to retrospectively identify 4803 patients who had undergone musculoskeletal tumor surgery during 2007 to 2010. Patients were then divided into tertiles of approximately equal size on the basis of the annual hospital volume (number of patients undergoing musculoskeletal tumor surgery): low, twelve or fewer cases/year; medium, thirteen to thirty-one cases/year; and high, thirty-two or more cases/year. Logistic regression analyses were performed to examine the relationships between various factors and the rates of postoperative complications and in-hospital mortality adjusted for all patient demographic characteristics.
RESULTS: The overall postoperative complication rate was 7.2% (348 of 4803), and the in-hospital mortality rate was 2.4% (116 of 4803). Postoperative complications included
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Resection of soft tissue tumors extending through the obturator ring.
Orthopedics. 2013 Sep 1;36(9):e1220-4
Authors: Starks A, Guo L, Abraham JA
Abstract
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Continuation of TNF blockade in patients with inflammatory rheumatic disease.
Acta Orthop. 2013 Sep 16;
Authors: Berthold E, Geborek P, Gülfe A
Abstract
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Extra-abdominal Periosteal Desmoid Tumor of the Third Toe.
Orthopedics. 2013 Sep 1;36(9):e1209-12
Authors: Saleem O, Sayres S, O'Malley M
Abstract
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Long-Term Survival of Cemented Distal Femoral Endoprostheses with a Hydroxyapatite-Coated Collar: A Histological Study and a Radiographic Follow-up.
J Bone Joint Surg Am. 2013 Sep 4;95(17):1569-75
Authors: Coathup MJ, Batta V, Pollock RC, Aston WJ, Cannon SR, Skinner JA, Briggs TW, Unwin PS, Blunn GW
Abstract
BACKGROUND: The objective of this study was to examine the degree of osteointegration into a hydroxyapatite-coated collar and relate this finding to aseptic loosening in patients with a distal femoral replacement used to treat primary bone cancer. Our hypothesis was that the implant collar would increase osteointegration and reduce the rate of aseptic implant loosening.
METHODS: Sixty-one patients treated with a primary cemented distal femoral prosthesis between 1992 and 2001 were included in this study. The mean duration of follow-up was 8.5 years (range, two to eighteen years). Extracortical bone growth into the grooved hydroxyapatite-coated collar was quantified radiographically. Histological sections through four hydroxyapatite-coated collars and four implants with no collar, retrieved following amputation due to local recurrence or at autopsy at a mean of 3.5 years (range, 1.4 to 6.1 years) after implantation, were evaluated as well.
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