Comparison of fixation strengths of locking head and conventional screws, in fracture and reconstruction models

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
J W SikesK A Coward

Abstract

Claimed clinical advantages of the locking-head mandibular reconstruction plating system include the ability to achieve stability with fewer numbers of screws per bony segment as compared with conventional screws. The purpose of this study was to test the hypothesis that increased resistance to displacement will be obtained when using locking-head as compared with the same number of conventional screws per segment in both fracture and reconstruction models. Eight groups were tested based on the screw number (two or four), screw type (locking-head or conventional), and fracture (bony apposition) or reconstruction model (1-cm defect). Two-dimensional beam mechanics using adult bovine ribs and the Instron machine were used to develop a load-displacement curve up to 150 N for each specimen. An osteotomy was then created and the segments were reduced, with preload (fracture model) or with a 1-cm defect (reconstruction model), and plated using the Synthes locking-head plate with either two or four bicortical locking-head (4.0-mm) or conventional (2.7-mm) screws per segment. The fixed ribs were loaded to 150 N, and the displacement was recorded. Locking-head screws provided superior resistance when using two screws per segment in the ...Continue Reading

References

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Oct 1, 1991·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·A L SöderholmB Rahn
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Citations

Jul 20, 2011·Journal of Materials Science. Materials in Medicine·Tarun GoswamiMichael J Prayson
Nov 15, 2000·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·T L Bredbenner, R H Haug
May 21, 2011·Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T·R StreubelT Guerrero
Nov 21, 2012·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Alexis B OlssonSanjay P Reddi
Jun 17, 2011·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Lewis Clayman, Enzo Rossi
Aug 17, 2010·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Behnam BohluliMohammad Hossein Seif Tabrizi
Dec 7, 2013·Orthopedics·Jason McKeanCyril Mauffrey
Apr 22, 2008·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Koichiro UekiEtsuhide Yamamoto
Feb 19, 2008·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Edward Ellis, Chris Price
Jan 3, 2007·The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons·Todd KimChristian M Puttlitz
Sep 24, 2015·Medical Engineering & Physics·Daniel F TensmeyerJoseph L Chess
Jan 8, 2014·Veterinary Surgery : VS·Tomás G GuerreroPatrick Kircher
Sep 20, 2006·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Thomas A ChiodoChristopher Sabitini
Feb 5, 2014·Foot & Ankle International·James R Jastifer
Jun 27, 2019·Journal of Feline Medicine and Surgery·Alessandro Conte, Elena Addison
Nov 3, 2005·The British Journal of Oral & Maxillofacial Surgery·Alexandre Elias Trivellato, Luis Augusto Passeri

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