Morphological aspects of tympanic bulla after ventral osteotomy in cats.
OBJECTIVE
To evaluate tympanic bulla healing after experimental ventral osteotomy in cats.


METHODS
Twenty adult cats were submitted to unilateral ventral bulla osteotomy and divided into two groups: cats of A1 group (n=10) were euthanized at 8 weeks and cats of A2 group (n=10), at 16 weeks postoperative.


RESULTS
Signs of Horner's syndrome or damage to the inner ear were not found. Open-mouth radiographs taken in the immediate postoperative showed interruption in the contour of the larger compartment of the operated bulla. The result of Mcnemar'test was significant in A2 group (*p=0.0156). Macroscopic exams revealed that the operated bullae were similar to the normal ones, with preservation of the tympanic cavity. Connective tissue at the osteotomy site of the larger compartment was significantly found in the operated bullae in both groups (McNemar test: A1 p=0.0020*; A2 p=0.0078*). Histomorphometric analyses showed that the connective tissue length at the osteotomy site was shorter in A2 group than in the A1 group (Mann-Whitney test: p=0.0021*).


CONCLUSIONS
Experimental ventral osteotomy did not alter significantly the tympanic bulla conformation and complete regeneration of tympanic bulla frequently did not occur before 16 weeks of postoperative period.
Silva
Adelina Maria da
AM
Department of Clinics, Surgery and Animal Reproduction, UNESP, Araçatuba, SP, Brazil. adelinasilva@uol.com.br
Souza
Wilson Machado de
WM
Carvalho
Roberto Gameiro de
RG
Machado
Gisele Fabrino
GF
Perri
Silvia Helena Venturoli
SH
D000818:Animals; D002371:Cat Diseases / Q000601:surgery*; D002415:Cats; D003238:Connective Tissue / Q000473:pathology; D004424:Ear Canal / Q000601:surgery*; D004432:Ear, Middle / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005260:Female; D008297:Male; D010027:Osteotomy / Q000379:methods / Q000662:veterinary*; D010033:Otitis Media / Q000601:surgery / Q000662:veterinary*; D011859:Radiography; D013701:Temporal Bone / Q000000981:diagnostic imaging / Q000473:pathology; D014021:Tissue Preservation; D014945:Wound Healing / Q000502:physiology*