Levator Nasolabials Muscle Transposition to Prevent an Orosinus Fistula after Tooth Extraction in Horses
1992
The ventral part of the levator nasolabials muscle was transposed to the alveolar defect after sinusotomy and tooth extraction in five normal horses and six horses with a tooth root abscess and sinusitis. In the normal horses at weeks 6, 10, 14 and 18, the transposed muscles remained viable and were incorporated into the recipient sites, and orosinus fistulae did not form. Histologically, there was a progressive transition from muscle to fibrous tissue. There was no facial deformity or loss of nasal function at the donor site. A localized abscess was associated with incomplete removal of tooth root fragments in one horse. After 1 year or more, five horses treated for dental disease had complete resolution of clinical signs. One horse continued to have intermittent mild nasal discharge.
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