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Issue title: A Selection of Papers from the International Symposium on Advanced Bio-Materials and Engineering '93 (ISABE '93)
Article type: Research Article
Authors: Kamegai, Akihide; | Shimamura, Norimasa | Naitou, Katsumi | Nagahara, Kuniteru | Kanematsu, Nobutake | Mori, Masahiko
Affiliations: Department of Oral and Maxillofacial Surgery, Asahi University School of Dentistry, 1851-1 Hozumi, Hozumi-cho, Motosu-gun, Gifu 501-02, Japan | Department of Maxillofacial Surgery and Stomatology, Shimada Municipal Hospital, 1200-5 Noda, Shimada City, Shizuoka, 427, Japan
Note: [] Requests for reprints should be addressed to Dr. Akihide Kamegai, Department of Oral and Maxillofacial Surgery, Asahi University School of Dentistry, 1851-1 Hozumi, Hozumi-cho, MQtosu-gun, Gifu 501-02, Japan.
Abstract: Self-setting apatite cement (apatite cement) with a phase of hydroxyapatite (HAP) was employed as a delivery system for bone morphogenetic protein (BMP). A composite of BMP and apatite cement (BMPIHAP composite) was implanted both in thigh muscle and surgically created defect of a critical size of 5 mm, which is a size that does not heal spontaneously in the femur of mice, to evaluate its osteogenetic potential as an augmentation and reconstructive material for clinical usage. The histological and immunohistochemical assessment of proteoglycans reiterated osteogenesis in the muscle tissue. On day 14 postimplantation of BMPIHAP composite, chondroid tissue was formed in the muscle, and HAP particles were seen in newly formed chondroid tissue. On the 21st day, endo-chondral ossification had occurred, however, small HAP particles remained in the newly formed bone, i.e., HAP particles and newly formed osseous tissues coexisted in a central area. BMP/HAP composite was incorporated by newly formed osseous tissue in the experimented animals. HAP particle found in BMP/HAP composite implanted into the bone defect was resorbed and replaced by osseous tissue. The apatite cement was proved to have advantages for its shaping as well as collapsing properties, and thus, apatite cement containing BMP is suggested as a favorable augmentation material in clinical usage for delivery system of BMP.
Keywords: bone morphogenetic protein (BMP), hydroxyapatite (HAP), self-setting apatite cement (apatite cement), BMP/HAP composite, delivery system
DOI: 10.3233/BME-1994-4405
Journal: Bio-Medical Materials and Engineering, vol. 4, no. 4, pp. 291-307, 1994
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