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Hydroxyapatite in the form of granules of different sizes is a popular material used in oral surgery. It is widely used in the guided bone regeneration technique (GBR). The essence of this method is to assist the healing process of bone defects by means of implantation material, natural or synthetic, which is placed within the bone cavity. Hydroxyapatite implant reduces the volume of the hematoma forming in the wound, prevents infection and has osteoconductive properties. It also increases local bone mechanical strength in the treated area. Three cases of patients with bone cavities after surgical treatment of inflammatory lesions have been described. The cavities have been filled with hydroxyapatite granules. The material has been used in two cases in animals in the treatment of oro-nasal fistula and in one case in a human after enucleation of an inflammatory lesion. It has been proved that hydroxyapatite as an implantation material provides better and faster recovery of bone lesions, while the bone that forms on the implant has a more regular structure than bone generated only on the basis of a clot. In the described cases the treatment of bone cavities in animals and humans proved to be a hydroxyapatite biomaterial accelerating the reconstruction of bone tissue.
One of the biomaterials used in veterinary dentistry is hydroxyapatite (HAp). It aids the biological process of bone reconstruction and provides the basis on which damaged tissues can be rebuilt. It is also exceptionally osteoconductive and bioactive towards bone and other tissues. The aim of the present study was to verify the usefulness of hydroxyapatite microporus ceramics for the treatment of periodontal diseases and post-extraction defects. The study was performed on 40 dogs. Dogs were qualified for the in vivo test: 2 study groups and 2 control groups (K1, K2) were created. Group G1 comprised 10 dogs diagnosed with periodontitis with 4-8 mm gingival pockets and mobility of mandibular/maxillary incisors. In order to avoid extraction, hydroxyapatite implantation into the bone pockets was performed. Group G2 comprised 10 dogs that required the extraction of maxillary canines, following which biomaterial was introduced into the post-extraction cavities. Control groups were performed without using of microporous hydroxyapatite. In group G1, animals displayed significant shallowing of gingival pockets. The mean depth of pockets was significantly reduced in those dogs and considerably better reconstruction of periodontal tissues was observed when compared to the control group K1. In group G2, significantly faster healing of bone cavities was stated when compared to the respective control group K2. The study confirmed the validity of using microporous hydroxyapatite granules and shaped blocks in reconstructive periodontal treatment as well as prevention of oronasal fistulas after canines extraction and facilitation of the post-extraction healing process.
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