Zinc ion implantation-deposition modification of titanium for enhanced adhesion of focal plaques of osteoblast-like cells / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Surface modification by ion implantation-deposition is well established in materials science and can be an effective way to improve biocompatibility. The aim of this study is to evaluate the chemical composition of a modified titanium (Ti) surface after zinc (Zn) ion implantation and deposition and examine the effect of the modification on the formation of cellular focal adhesion plaques in vitro.</p><p><b>METHODS</b>cp-Ti discs were modified with Zn ion implantation and deposition via PIIID. The chemical composition of the surface modification was characterized by X-ray photoelectron spectroscopy (XPS). The formation of focal adhesion plaques on the modified Ti was investigated with human osteoblast-like MG-63 cells that were seeded onto the Ti surfaces and quantified by morphometric analysis under a confocal microscope.</p><p><b>RESULTS</b>XPS data revealed that the modified Zn-Ti surface consisted of Ti, oxygen, Zn, and carbon. In addition, Gaussian fitting of the spectra indicated that the modified surface contained titanium dioxide and zinc oxide. After 6 hours of MG-63 cell culture, there were significantly more focal adhesion plaques on the modified surfaces than observed on the nonmodified Ti (P < 0.05).</p><p><b>CONCLUSION</b>Zn ion implantation and deposition greatly improved the biocompatibility of Ti for the growth of MG-63 cells.</p>

Evaluation of the clinical results of non-surgical treatment for pediatric sagittal fracture of mandibular condyle / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the clinical results of occlusal splint in the treatment of sagittal fracture of mandibular condyle (SFMC) in children.</p><p><b>METHODS</b>Thirty-nine patients (48 condyles)aged 3-8 years with sagittal fracture of mandibular condyle were included in this study. All the patients were treated by occlusal splint.Slight open occlusion was maintained by occlusal splint for 3-6 months. Clinical and radiological examination was performed six mouths and every year after treatment.</p><p><b>RESULTS</b>Good mandibular function was observed in 39 patients. Maximal mouth opening over 35 mm was achieved at 6 months. But 11 of the 39 patients presented with deviation on mouth opening at 6 months. The radiology showed an complete remodeling in 32 condyles (28 patients) and partial remodeling in 16 condyles (11 patients). Poor remodelling was not observed in any patients.</p><p><b>CONCLUSIONS</b>Good clinical results can be obtained by using occlusal splint in the treatment of pediatric sagittal fracture of mandibular condyle.</p>