http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Endodontic Management of Mandibular Second Premolar with Three Roots: A Case Report
Vivek Kapoor,Ruchi Singla,Rajni Kapoor 대한예방치과학회 2020 International Journal of Clinical Preventive Denti Vol.16 No.1
Effective endodontic treatment comprises proper diagnosis, meticulous cleaning and shaping followed by three dimensional obturation. Failure to do so may lead to postoperative diseases, pain and further complications. Mandibular second premolars are usually single rooted with single root canal. Variations of having more than one canal/root also exist but variation is less as compared to mandibular first premolar. This case report describes endodontic management of mandibular second premolars with three root canals.
Kapoor, S.,Goel, A.,Correia, A.F.,Pascual, M.J.,Lee, H.Y.,Kim, H.W.,Ferreira, J.M.F. Elsevier 2015 Materials Science and Engineering C Vol.53 No.-
The present study reports on the influence of partial replacement of MgO by ZnO on the structure, crystallisation behaviour and bioactivity of alkali-free bioactive glass-ceramics (GCs). A series of glass compositions (mol%): 36.07 CaO-(19.24-x) MgO-x ZnO-5.61 P<SUB>2</SUB>O<SUB>5</SUB>-38.49 SiO<SUB>2</SUB>-0.59 CaF<SUB>2</SUB> (x=2-10) have been synthesised by melt-quench technique. The structural changes were investigated by solid-state magic angle spinning nuclear magnetic resonance (MAS-NMR), X-ray diffraction and differential thermal analysis. The sintering and crystallisation behaviours of glass powders were studied by hot-stage microscopy and differential thermal analysis, respectively. All the glass compositions exhibited good densification ability resulting in well sintered and mechanically strong GCs. The crystallisation and mechanical behaviour were studied under non-isothermal heating conditions at 850<SUP>o</SUP>C for 1h. Diopside was the primary crystalline phase in all the GCs followed by fluorapatite and rankinite as secondary phases. Another phase named petedunnite was identified in GCs with ZnO content >4mol. The proliferation of mesenchymal stem cells (MSCs) and their alkaline phosphatase activity (ALP) on GCs was revealed to be Zn-dose dependent with the highest performance being observed for 4mol% ZnO.