Influence of an interdental full pin on stability of an acrylic external fixator for rostral mandibular fractures in dogs

American Journal of Veterinary Research
W T CookJ W Grant

Abstract

To determine total stiffness and gap stiffness of an external fixation system in a canine mandibular fracture gap model incorporating a full interdental pin as the only point of rostral fixation in a bilateral type-I external fixator. 10 canine mandibles. Bilateral mandibular ostectomies were performed between premolars 3 and 4. A type-I external fixator incorporating a full interdental pin was placed to stabilize a 0.5-cm fracture gap. Four pin configurations (intact mandibular bodies with fixator; ostectomized mandibular bodies and complete fixator; ostectomized mandibular bodies with caudal pins of rostral fragment cut; ostectomized mandibular bodies with all pins of rostral fragment cut) were tested in dorsoventral bending 5 times on each mandible. The full interdental pin remained intact in all configurations. Total stiffness and gap stiffness were determined for each configuration on a materials testing machine. Total stiffness of intact mandibles was significantly greater than that of ostectomized mandibles, regardless of external fixator configuration. However, total stiffness and gap stiffness were not significantly different among different external fixator configurations applied to ostectomized mandibles. External fi...Continue Reading

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Citations

Oct 2, 2013·Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T·A M KitshoffG Steenkamp
Mar 15, 2011·Veterinary Surgery : VS·Mehmet Alper CetinkayaUmit Kaya
Sep 10, 2005·Journal of Veterinary Dentistry·Fernanda M LopesHerbert L Correa

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