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Influence of plate type and placement on the immobilization of bilateral equine mandibular osteotomies: Ex vivo study
Author(s) -
Durket Elyse,
Kersh Kevin,
Dembek Katarzyna,
Riedesel Elizabeth,
Silverstone Auri,
Kraus Karl H.
Publication year - 2019
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/vsu.13198
Subject(s) - medicine , fixation (population genetics) , osteotomy , cadaver , transverse plane , orthodontics , dynamic compression plate , dentistry , population , anatomy , internal fixation , environmental health
Objective To determine the influence of plate fixation (locking or dynamic compression) and the site of application (ventral [V] or ventrolateral [VL]) on the resistance to bending of transverse mandibular fractures. Study design Ex vivo, simple randomized study. Sample population Mandibles harvested from adult equine cadavers (n = 18). Methods Bilateral osteotomies were created 1 cm caudal to the mental foramen and perpendicular to the long axis of each mandible. Mandibles were fixed with 1 of 3 methods: (1) VL dynamic compression plate (DCP), (2) V‐DCP, or (3) VL locking compression plating (LCP). Constructs were mounted on a custom testing jig and tested for resistance in bending by applying force to the rostral aspect of the mandible. Stiffness and change of distance of the dorsal osteotomy at 200 N were compared among constructs. Results VL‐LCP constructs were 5.25 and 2.42 times stiffer than V and VL constructs, respectively ( P <.001). Change in the width of the osteotomy gap at 200 N of load was reduced 6.04 times when osteotomies were stabilized with VL compared to V ( P <.001); no difference was detected between the VL and VL‐LCP constructs (P=.836). Conclusion Ventrolateral LCP fixation of equine transverse mandibular osteotomies provided greater resistance to bending compared with V and VL constructs. Clinical significance These results provide evidence to recommend fixation of transverse interdental mandibular fractures with VL‐LCP rather than with DCP in horses.

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