Dynamics of Alloplastic Bone Grafts on an Early Stage of Corticotomy-Facilitated Orthodontic Tooth Movement in Beagle Dogs

Figure 9

Microphotograph of a buccopalatal/lingual section of the 4-week experiment. (a) Maxilla. Most of the grafted MBCP+ particles were well maintained. New bone formation along the PDL formed a new buccal bone wall. ((b) and (c)) Higher magnification of (a) at the crest area. (d) Higher magnification of (a). The bone-derived mesenchymal matrix bordered the PDL-derived mesenchymal matrix. A new bone island was formed in the center of the bone-derived mesenchymal matrix. (e) Higher magnification of (d). Osteoblasts and osteocytes were observed. (f) Higher magnification of (a). The grafted MBCP+ particles were bridged with newly formed bone in the bone-derived mesenchymal matrix on the buccal side. (g) Higher magnification of (f). Entrapped osteocytes and aggregated osteoblasts were observed. (h) Higher magnification of (a). (i) Higher magnification of (h). New bone was formed in the center of the grafted MBCP+ particles at the buccal side. ((j) and (l)) Higher magnification of (a). The palatal tension side at the crestal (j) and apical (l) areas. ((k) and (m)) Higher magnification of (j) and (l), respectively. Aggregated osteoblasts and active form of osteoblasts were seen. (n) Mandible. (o) Higher magnification of (n) at the crestal area. New bone forming a buccal bone wall and crest was observed. (p) Higher magnification of (n). Native bone (red star) and new bone (yellow star). (q) Higher magnification of (n). New bone (yellow star) was formed on the outer and inner surface of the native bone (red star). ((r), (s), and (t)) Higher magnification of (n). The outer portion of the bone-derived mesenchymal matrix. Grafted MBCP+ particles were bridged by the newly formed bone. Masson’s trichrome stain. Original magnification was ×12.5 for (a) and (n), ×100 for (b), (c), (d), (f), (h), (j), (l), (o), (p), (q), (r), (s), and (t), and ×400 for (e), (g), (i), (k), and (m).

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