ABSTRACT
Objective To evaluate the curative effect of dental implant by crownless bridge works (CBW). Methods The index of gingival bleeding, the index of tooth loosing and successful rate of dental implant by CBW and common dental implant on 60 rabbit models was investigated on 1, 2, 3, 6, 9, 12 month. Results The survival rate of dental implant by CBW was higher than that of common dental implant. Conclusion The dental implant by crownless bridge works can reduce the pressure to the bone and improve the successful rate of implant.
ABSTRACT
Objective To determine the expression and the change of vascular endothelial growth factor(VEGF) and it's acceptor Flt-1 during maxillofacial blast injury at early stage,and to evaluate the effect of VEGF on traumatic wound healing.Methods The rabbit model of maxillofacial blast injury was made by KTY-04 blasting cap. The expression of VEGF and Flt-1 in wound tissue was determined by ABC immunohistochemistry after injury 6h,1d,2d,3d,5d,and 7d. Also,the results were compared with preinjury groups.Results In the wound tissue of maxillofacial blast injury, the expression of VEGF was rising steadily at the first week after injury. Comparing with normal tissue,it showed different from the first day after injury, and showed very different from the third day(P<0.01).It reached the peak at the seventh day after injury.The expression of Flt-1 showed no difference within 3 days after injury comparing with normal tissue.After injury 5d-7d,the protein expressed strengthly.Conclusion The stage of the VEGF expression at maxillofacial blast injury is similar to the angiogenic stage during wound healing, and the Flt-1 expression is also occurring at that period.It illustrates that VEGF take part in angiogenic cascades of traumatic wound healing and product auxo-action to the regeneration of blood vessel.