Abstract
To evaluate bone healing in the extraction socket of the feline maxillary canine tooth after grafting. Eighteen adult cats were submitted to unilateral extraction of maxillary canine tooth and divided into three groups. In group 1 (n=6), control, the extraction socket was left empty. In group 2 (n=6), the extraction socket was filled with autogenous cancellous bone from the iliac crest and in group 3 (n=6), with bioactive glass particulate material. Cats were euthanized at four weeks postoperative. The radiographic examinations performed four weeks after surgery showed that in all groups the healing process converged to a radiopacity similar to that observed in the surrounding bones. Histological examination showed formation of woven bone within the extraction socket. The percentage of newly formed bone within the extraction socket, measured by the histometry, showed no statistically significant difference among the values of the three groups (Kruskal-Wallis'test p>0.05) (group 1: 63.96 ± 5.85, group 2: 66.84 ± 11.67, group 3: 59.28 ± 15.50). The bone regeneration observed in the extraction sockets filled with autogenous cancellous bone or bioactive glass was similar to that observed in the control sites, given an observation period of four weeks after extraction of the maxillary canine tooth.
Highlights
The use of a variety of materials to fill extraction sockets has been studied in order to accelerate bone regeneration, maintain alveolar ridge and reinforce the resistance of the maxilla or mandible[1,2,3,4,5,6,7,8]
The cats were euthanized at four weeks postoperative by intravenous thiopental overdosage
The oronasal fistula is a possible complication after maxillary canine tooth extraction in dogs and cats
Summary
The use of a variety of materials to fill extraction sockets has been studied in order to accelerate bone regeneration, maintain alveolar ridge and reinforce the resistance of the maxilla or mandible[1,2,3,4,5,6,7,8]. Bioactive glass particles are composed of salts of calcium, sodium, phosphorus and silica. When implanted in living tissue, the granules undergo a surface reaction that results in the formation of a calcium phosphate layer that is substantially equivalent to the hydroxyapatite found in bone mineral. This layer provides scaffold for bone growth. The bioactive glass particles form a cohesive mass when contacting the blood, thereby exhibiting hemostatic properties[1,16]
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