Use of Polyurethane as a Sealing Material for Frontal Bone Cavities during the Dehorning Technique in Adult Bovines

Author(s): Aguirre EGG, Larios GMC, Utrera QF, Galicia DJA, Ortíz GS, Zambrano GMA, Mancilla SC, Ramírez MA, Morales NG

The germinal button of the cornual structure is present in the males and females of the entire Bovidáe family; unlike the antlers found in species such as deer, elk and antelope, where the horns are not permanent and are branched. The already developed horns are made up of a bony nucleus that corresponds to the prolongation of the frontal bone, which internally houses the sinus, emerging from its base and growing to the tip, where it presents a thin layer of tissue with keratin deposit that externally forms the protective covering, composed of structural protein and not mineralized, as found in the nails, hooves, hair and feathers of birds [1]. Total amputation of horns or cornuectomy, is recommended not only with aesthetic purposes, but also to avoid fractures of the bone support, due to trauma or blows, which are very painful especially when the frontal bone is overexposed (avulsion), in addition to generating infectious processes and even the formation of fissures [2]. In intensive production units, the germinal button of the horn is normally prevented from developing by using caustic ointments, or if there is already a certain development of the horn, Barnes forceps or Liz's clasp are used, however some specimens continue to develop the cornual structure and when they reach adulthood (2 years of age onwards), the horns are already quite developed and it is only recommended aesthetic dehorning that is not very manageable because it requires a surgical procedure, preceded by good preoperative management; local anesthesia and sedation. An intraoperative that is to amputate the horns and a postoperative with the necessary care (administration of antimicrobials), as well as respecting the principles of asepsis and antisepsis [3]. Anatomically, the horns are supplied by branches of the anterior and superficial temporal auricular artery that form the cornual artery, which emerges crossing the caudal portion of the frontal tuberosity; There is also a deep