1.Discussion of hospitals' reform of the property right system
Wei FAN ; Huixian HU ; Tuqiang LI
Chinese Journal of Hospital Administration 1996;0(09):-
By analyzing the crisis of survival in 2 hospitals, the authors argue that reform of the hospital property right system may be a way out. However, in the process of the reform, hospitals may face some problems. One problem is how to ensure the steady transition and sustained development of a hospital if the whole of it is sold out to an enterprise run by the local people. Another problem is how to safeguard the status, salary and welfare of the staff. To ensure the success of the reform, the following measures need to be taken: ①strengthening leadership, seeking unity of thinking, and clarifying the guiding ideology; ②formulating rigorous and detailed plans so as to guarantee a steady transition; ③making proper arrangements for the placement of the staff after the change of the property right system so as to ensure the ideological stability of the staff.
2.The shaping ability of manual ProTaper on mandibular second molars
Li HE ; Bing FAN ; Tuqiang HU ; Zhuan BIAN
Journal of Practical Stomatology 2010;26(1):117-119
Investigate the cleaning ability of manual ProTaper on mandibular second molars with C-shaped (c-shaped root) or normal root canal(separated root). Twenty mandibular second molars with C-shaped root or with separated roots were sectioned at 3.0, 5.5 and 8.0 mm from the root apex. The images of pre-preparation and F1, F2, and F3-prepapared of manual ProTaper were captured respectively. The cross-sectional areas of the canals were measured and the formula of area after treatment/area before treatment was used to calculate the area ratio. The data were analyzed by SPSS 10.0. The results showed that there was no statistically difference between cross-section root canal area ratios in two groups. Significant differences were found between the cross-section canal area ratio of F1 and F2, F1 and F3 at section 5 mm of S group, and F1 and F3 at section 3 mm of C group. The results suggested that the increasing of cross-section ratio of the two kinds of canals was not obviously concerned with their anatomical morphology.
3.Application of PBL teaching model in the probation of endodontics
Li HE ; Tuqiang HU ; Yongqing ZHOU ; Jie PANG
Chinese Journal of Medical Education Research 2006;0(10):-
By introducing the PBL teaching model into the probation curriculum of endodon-tics,the authors explored the curricular arrangment and the construction of teaching materials.The monitoring of teaching quality and revision of teaching syllabus were also analyzed.To induce the model profoundly,the authors considered some problems raised during the teaching procedure should be resolved.
4.The Combination of Concentrated Growth Factor and AdiposeDerived Stem Cell Sheet Repairs Skull Defects in Rats
Tuqiang HU ; Hao ZHANG ; Wei YU ; Xuezhou YU ; Zubing LI ; Li HE
Tissue Engineering and Regenerative Medicine 2021;18(5):905-913
BACKGROUND:
The goal of this study was to create a biomaterial which combines concentrated growth factor (CGF) with an adipose-derived stem cell (ADSC) sheet to promote the repair of skull defects in rats.
METHODS:
We determined the optimal concentration of CGF extract by investigating the effects of different concentrations (0, 5%, 10%, and 20%) on the proliferation and differentiation of ADSCs. Then we created a complex combining CGF with an ADSC sheet, and tested the effects on bone repair in four experimental rat groups: (A) control; (B) ADSC sheet; (C) CGF particles; (D) combination of CGF ? ADSCs. Eight weeks after the procedure, osteogenesis was assessed by micro-CT and hematoxylin and eosin staining.
RESULTS:
We found that the concentration of CGF extract that promoted optimal ADSC proliferation and differentiation in vitro was 20%. In turn, bone regeneration was promoted the most by the combination of CGF and ADSCs.
CONCLUSION
In this study, we determined the optimal ratio of CGF and ADSCs to be used in a biomaterial for bone regeneration. The resulting CGF/ADSCs complex promotes maxillofacial bone defect repair in rats.
5.The Combination of Concentrated Growth Factor and AdiposeDerived Stem Cell Sheet Repairs Skull Defects in Rats
Tuqiang HU ; Hao ZHANG ; Wei YU ; Xuezhou YU ; Zubing LI ; Li HE
Tissue Engineering and Regenerative Medicine 2021;18(5):905-913
BACKGROUND:
The goal of this study was to create a biomaterial which combines concentrated growth factor (CGF) with an adipose-derived stem cell (ADSC) sheet to promote the repair of skull defects in rats.
METHODS:
We determined the optimal concentration of CGF extract by investigating the effects of different concentrations (0, 5%, 10%, and 20%) on the proliferation and differentiation of ADSCs. Then we created a complex combining CGF with an ADSC sheet, and tested the effects on bone repair in four experimental rat groups: (A) control; (B) ADSC sheet; (C) CGF particles; (D) combination of CGF ? ADSCs. Eight weeks after the procedure, osteogenesis was assessed by micro-CT and hematoxylin and eosin staining.
RESULTS:
We found that the concentration of CGF extract that promoted optimal ADSC proliferation and differentiation in vitro was 20%. In turn, bone regeneration was promoted the most by the combination of CGF and ADSCs.
CONCLUSION
In this study, we determined the optimal ratio of CGF and ADSCs to be used in a biomaterial for bone regeneration. The resulting CGF/ADSCs complex promotes maxillofacial bone defect repair in rats.