日本語フィールド
著者：○Danjo A, Aijima R, Yoshimoto R, Tanaka S, Iwamoto S, Katsukia T, Aoki S, Kido M, Yamashita Y題名：An ultrasonic osteotomy device enhanced post-osteotomy bone healing beyond that with a conventional rotary device in a rat calvarial model発表情報：J Oral Maxillofac Surg Med Pathol 巻: 34 号: 3 ページ: 243-251キーワード：概要：Objective
Ultrasonic osteotomy devices (UODs) are reported to have many clinical benefits; for example, they cause little damage to adjacent tissues in oral surgery. However, the difference in the tissue repair process between rotary osteotomy devices (RODs) and UODs is still unclear. This study aimed to compare bone healing after osteotomy with UODs versus RODs in a rat calvarial defect model.
Methods
Calvarial bone defects were made in male Wistar rats with a UOD on the right side and an ROD on the left side. Bone and morphological changes were quantitatively evaluated for 4 weeks by micro-CT, light microscopy and electron microscopy. Furthermore, after calvarial bone osteotomy, osteoblastic cells were collected from the bone chips and cultured for 2 weeks, and their proliferation and differentiation activities were analysed.
Results
Scanning electron microscopy (SEM) showed that UOD cuts had smoother surfaces than ROD cuts. In HE-stained sections and micro-CT images, the bone wound gap was closed earlier on the UOD side than on the ROD side. Bone thickness, the quantity of newly formed bone, and the number of osteocytes were greater on the UOD side than on the ROD side. Cultured osteoblast-like cells harvested from bone chips cut by the UOD had greater proliferative activity than those harvested from ROD-cut bone chips.
Conclusions
The use of a UOD may assist bone regeneration, presumably because osteoblasts differentiated from mesenchymal cells are activated by ultrasonic microvibration and because UODs cause less damage to the bone than conventional RODs.抄録：英語フィールド
Author：○Danjo A, Aijima R, Yoshimoto R, Tanaka S, Iwamoto S, Katsukia T, Aoki S, Kido M, Yamashita YTitle：An ultrasonic osteotomy device enhanced post-osteotomy bone healing beyond that with a conventional rotary device in a rat calvarial modelAnnouncement information:J Oral Maxillofac Surg Med Pathol Vol: 34 Issue: 3 Page: 243-251An abstract：Objective
Ultrasonic osteotomy devices (UODs) are reported to have many clinical benefits; for example, they cause little damage to adjacent tissues in oral surgery. However, the difference in the tissue repair process between rotary osteotomy devices (RODs) and UODs is still unclear. This study aimed to compare bone healing after osteotomy with UODs versus RODs in a rat calvarial defect model.
Methods
Calvarial bone defects were made in male Wistar rats with a UOD on the right side and an ROD on the left side. Bone and morphological changes were quantitatively evaluated for 4 weeks by micro-CT, light microscopy and electron microscopy. Furthermore, after calvarial bone osteotomy, osteoblastic cells were collected from the bone chips and cultured for 2 weeks, and their proliferation and differentiation activities were analysed.
Results
Scanning electron microscopy (SEM) showed that UOD cuts had smoother surfaces than ROD cuts. In HE-stained sections and micro-CT images, the bone wound gap was closed earlier on the UOD side than on the ROD side. Bone thickness, the quantity of newly formed bone, and the number of osteocytes were greater on the UOD side than on the ROD side. Cultured osteoblast-like cells harvested from bone chips cut by the UOD had greater proliferative activity than those harvested from ROD-cut bone chips.
Conclusions
The use of a UOD may assist bone regeneration, presumably because osteoblasts differentiated from mesenchymal cells are activated by ultrasonic microvibration and because UODs cause less damage to the bone than conventional RODs.