Research Article

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

Figure 8

Microphotograph of a buccopalatal/lingual section of the 2-week experiment. (a) Maxilla. Most of the grafted MBCP+ particles were well maintained. (b) Higher magnification of (a) at the crest area. Undermining resorption on the pressure side was observed. (c) Higher magnification of (b). Extravasation of RBC was observed in the PDL space. Resorption bays, which indicate undermining resorption on the pressure side, were also observed. (d) Higher magnification of (a) at the buccal bone surface. New bone formation surrounding the grafted MBCP+ particles was observed. Grafted MBCP+ particles were bridged by newly formed bone. (e) Higher magnification of (d). Abundant osteoblasts were forming new bone. (f) Higher magnification of (a). Osteoblasts were forming a new bone island. (h) Higher magnification of (a). Grafted particles encircled by new bone were bridged with the buccal bone surface. (j) Higher magnification of (a). New bone was formed in the PDL space at the buccal tension area. New bone was formed from the bone. (l) Mandible. Most of the grafted MBCP+ particles were well maintained. (m) Higher magnification of (l) at the crest area. Grafted particles were resorbed by osteoclasts. (n) Higher magnification of (m). (o) Higher magnification of (l). (p) Higher magnification of (l). Bone and root surface resorption by osteoclasts were observed. (q) Higher magnification of (l). Undermining resorption at the buccal bone in the PDL area was observed. (r) Higher magnification of (q). Many osteoblasts filled the resorption bay. (s) Higher magnification of (l). Active new bone formation was found at the buccal bone surface in the apical area. (t) Higher magnification of (s). Many osteoblasts were forming a new bone encircling the grafted MBCP+ particles. (u) Higher magnification of (s). Osteoclastic and osteoblastic activities were both observed. (v) Higher magnification of (l). New bone islands were formed. (w) Higher magnification of (v). (x) Higher magnification of (v). Abundant osteoblasts were actively forming new bone islands. Masson’s trichrome stain. Original magnification was ×12.5 for (a) and (l); ×100 for (b), (d), (f), (h), (j), (m), (o), (q), (s), and (v), and ×400 for (c), (e), (g), (i), (k), (n), (p), (r), (t), (u), (w), and (x).
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