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Vanguard Knee Replacements

Dinu Vermesan, Ilie Trocan, Radu Prejbeanu, Dan V Poenaru, Horia Haragus, Damian Gratian, Massimo Marrelli, Francesco Inchingolo, Monica Caprio, Raffaele Cagiano, Marco Tatullo
BACKGROUND: There is no consensus regarding the use of retaining or replacing cruciate implants for patients with limited deformity who undergo a total knee replacement. Scope of this paper is to evaluate whether a cruciate sparing total knee replacement could have a reduced operating time compared to a posterior stabilized implant. METHODS: For this purpose, we performed a randomized study on 50 subjects. All procedures were performed by a single surgeon in the same conditions to minimize bias and only knees with a less than 20 varus deviation and/or maximum 15° fixed flexion contracture were included...
March 2015: Journal of Clinical Medicine Research
Safa Kassab, William S Pietrzak
Traditional manual instruments for total knee arthroplasty are associated with a malalignment rate of nearly 30%. Patient-specific positioning guides, developed to help address alignment, may also influence other intraoperative factors. This study compared a consecutive series of 270 Vanguard total knee replacements performed with Signature patient-specific positioning guides (study group) to a consecutive series of 595 similar knee replacements performed with manual instrumentation (control group). The study group averaged 16...
2014: Journal of Surgical Orthopaedic Advances
B Fink, C Schwenninger
BACKGROUND: Osteoarthritis of the knee joints is rarely seen only in the femoropatellar joint. In isolated severe osteoarthritis of the femoropatellar joint an isolated prosthetic joint replacement of this joint is indicated. To achieve good results, correct patient selection with no arthritis in the femorotibial joint and absence of maltracking and instability of the patella are crucial. Modern prostheses with a femoral onlay component and a proper surgical technique with correct alignment of the prosthetic component and prevention of an overstuffing of the patella are essential...
April 2014: Zeitschrift Für Orthopädie und Unfallchirurgie
Arthur J Kievit, Matthias U Schafroth, Leendert Blankevoort, Inger N Sierevelt, C Niek van Dijk, Rutger C I van Geenen
A cross-sectional study in two hospitals was performed on 807 patients with a primary Vanguard (Biomet) total knee Arthroplasty (TKA). The research questions addressed were (1) what are the two- and six year survival rates of the Vanguard, (2) what are the clinical outcome scores, (3) what are the findings at revision and (4) what are predictors for revision? The mean age at time of surgery was 67.0 (SD 10.0). The mean follow-up was 3.6 years (95% CI 3.56-3.73). At two years the survival was 97.2% for all-reasons (767 patients remaining) and 99%, for prosthesis-related-reasons (777 remaining)...
February 2014: Journal of Arthroplasty
William C Schroer, Daniel M Stormont, William S Pietrzak
Certain recreational, cultural, occupational, and religious practices may require knee flexion exceeding typical daily living activity needs. Some total knee prostheses mechanically accommodate high flexion to help meet such demands, e.g., the Vanguard knee (Biomet, Inc., Warsaw, IN) which can mechanically achieve 140°-145°. This multicenter, prospective clinical study of 957 Vanguard knees (865 patients) examined mid-term outcomes. The Kaplan-Meier survivorship estimate was 97.8% (95% CI: 96.5-98.7%) at 7...
January 2014: Journal of Arthroplasty
Masahiro Kurita, Tetsuya Tomita, Takaharu Yamazaki, Masakazu Fujii, Kazuma Futai, Norimasa Shimizu, Hideki Yoshikawa, Kazuomi Sugamoto
PURPOSE: The objective of this study was to evaluate the in vivo knee kinematics to assess the available functional motion of the characteristic mobile-bearing prosthesis design and to examine whether the artificial joint would work in vivo according to its design concept. METHODS: We studied 14 knees (11 patients) implanted with the Vanguard RP Hi-Flex prosthesis. This prosthesis has a highly original form of post-cam called a PS saddle design with high compatibility, and with a rotating plate mobile-bearing mechanism...
December 2012: International Orthopaedics
Stephen M Howell, Esther E Hodapp, Joseph V Vernace, Maury L Hull, Thomas D Meade
PURPOSE: Tibiofemoral contact kinematics or knee implant motions have a direct influence on patient function and implant longevity and should be evaluated for any new alignment technique such as kinematically aligned total knee arthroplasty (TKA). Edge loading of the tibial liner and external rotation (reverse of normal) and adduction of the tibial component on the femoral component are undesirable contact kinematics that should be minimized. Accordingly, this study determined whether the overall prevalence of undesirable contact kinematics during standing, mid kneeling near 90 degrees and full kneeling with kinematically aligned TKA are minimal and not different between groups of consecutive patients treated by different surgeons...
October 2013: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Radosław Stempin, Andrzej Kotela, Monika Ostrowska, Ireneusz Kotela
On 15th May 2010 in Poland first computer planned total knee arthroplasty Vanguard Signature was performed and until now, including Orthopedic Traumatology Department of Central Clinical Hospital Ministry of Interior and Administration in Warsaw and Orthopedic Surgery Department of Promienista Clinic in Poznan, 65 patients have been operated with this method. The new system includes programming technical parameters of operation on the basis of diagnostic analysis of lower extremity using CT or MRI scans. Data are transmitted on Signature Positioning Guides (SPG) which implements function of navigation during surgery...
November 2011: Chirurgia Narzadów Ruchu i Ortopedia Polska
Carmen Zietz, Philipp Bergschmidt, Andreas Fritsche, Daniel Kluess, Wolfram Mittelmeier, Rainer Bader
UNLABELLED: PURPOSE. To compare the inner contour of the femoral component of 10 total knee replacement (TKR) designs for possible exchange in use. METHODS: Inner contours of the femoral components of 10 cemented, cruciate-retaining TKR designs (e.motion, Genesis, Genia, Innex, LCS, Multigen Plus, NexGen, PFC, Scorpio, Vanguard) were scanned and reconstructed to 2-dimensional contours. Their cross-sections were compared by superimposition and aligning at the distal and anterior cuts...
April 2012: Journal of Orthopaedic Surgery
Jee Hyoung Kim, Song Lee, Dong Oh Ko, Chang Wook Yoo, Tae Hwan Chun, Jung Soo Lee
BACKGROUND: We would like to analyze the risk factors of no thumb test among knee alignment tests during total knee arthroplasty surgery. METHODS: The 156 cases of total knee arthroplasty by an operator from October 2009 to April 2010 were analyzed according to preoperative indicators including body weight, height, degree of varus deformity, and patella subluxation and surgical indicators such as pre-osteotomy patella thickness, degree of patella degeneration, no thumb test which was evaluated after medial prepatella incision and before bone resection (1st test), no thumb test which was evaluated with corrective valgus stress (2nd test, J test), and the kind of prosthesis...
December 2011: Clinics in Orthopedic Surgery
Dae Kyung Bae, Sang Jun Song, Kyoung Ho Yoon, Jung Ho Noh, Seong Cheol Moon
PURPOSE: Pre- and postoperative tibial posterior slope angles (PSAs) were assessed in patients who underwent cruciate-retaining total knee arthroplasty (TKA). MATERIAL AND METHODS: A total of 386 cruciate retaining TKA were performed in 308 patients and retrospectively reviewed. Based on the prostheses, 202 cases using NexGen were classified as group I, 120 cases using PFC sigma as group II, and 64 cases using Vanguard as group III. Postoperative PSA of groups I, II, and III were compared...
April 2012: International Orthopaedics
Riichiro Tsukamoto, Paul Allen Williams, Hiromu Shoji, Kazuo Hirakawa, Kengo Yamamoto, Mikiko Tsukamoto, Ian C Clarke
Hi-fax 1900 tibial inserts were used in the IB-1 total knee replacement (TKR) beginning 1978, soon followed by the AGC design. Such direct compression molded (DCM) inserts was relatively immune to oxidation. Unfortunately the Hi-fax 1900 resin (H1900) was taken off the market in year 2004. As an alternate, GUR1050 was introduced in the Vanguard TKR. However there appeared to be little or no wear comparisons of molded inserts. Therefore the study aim was to compare wear performance of GUR1050 to the historical H1900...
May 2008: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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