Odontoiatria e Maxillofacciale

SOCKET PRESERVATION USING ENZYME-TREATED EQUINE BONE GRANULES AND AN EQUINE COLLAGEN MATRIX: A CASE REPORT WITH HISTOLOGICAL AND HISTOMORPHOMETRICAL ASSESSMENT.

2016
Autore : Todeschini G., Pieri L., Lomartire G., Leonida A., Cinci L.

Soft tissue regeneration combining an equine enzymatically deantigenated bone graft with a three-dimensional collagen matrix

The aim is to histologically assess the effectiveness of a socket-preservation technique using enzyme-treated equine bone granules as a bone-graft material in combination with an equine collagen matrix as a scaffold for soft-tissue regeneration.  The patient had one mandibular molar extracted and the socket grafted with equine bone granules. The graft was covered with the equine collagen matrix, placed in a double layer. No flap was prepared, and the gingival margins were stabilized with a single stitch, leaving the matrix partially exposed and the site to heal by secondary intention. The adjacent molar was extracted one month later, and that socket was left to heal by secondary intention without any further treatment. Three months after each surgery, an implant was placed and a biopsy collected. The two biopsies underwent histological processing and qualitative evaluation. Histomorphometric analysis also was performed to calculate the percentage of newly formed bone (NFB) in the two cores. Healing at both sites was uneventful, and no inflammation or other adverse reactions were observed in the samples. Soft-tissue healing by secondary intention appeared to occur faster at the grafted site. The corresponding core showed a marked separation between soft and hard tissue that was not observed in the core from the non-grafted site, where soft tissue hypertrophy could be observed. NFB at the grafted and non-grafted sites was not significantly different (27.2 ± 7.1 % and 29.4 ± 6.2% respectively, p=.45). The surgical technique employed in this case appeared to facilitate post-extraction soft-tissue healing by second intention and simplify soft-tissue management. Using a collagen-based matrix to cover a post-extraction grafted site may facilitate second intention soft-tissue healing and proper soft tissue growth.

PRODUCTS USED: Osteoxenon Mix Granules OSP-OX31, Biocollagen Xenomatrix BCG-XC10

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