{"id":20,"date":"2011-09-26T12:23:57","date_gmt":"2011-09-26T16:23:57","guid":{"rendered":"https:\/\/coefs.charlotte.edu\/arelgha\/?page_id=20"},"modified":"2026-03-11T11:54:02","modified_gmt":"2026-03-11T15:54:02","slug":"research","status":"publish","type":"page","link":"https:\/\/coefs.charlotte.edu\/arelgha\/research\/","title":{"rendered":"Research"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Coating of Metallic Implants with SCPC Bioactive Ceramic<\/h2>\n\n\n\n<p>Coating orthopedic implants with bioactive ceramics has the potential to improve material-tissue integration and provide better fixation of the device. SCPC has been coated on Ti-6Al-4V as well as Co-Cr alloys using electrophoretic deposition (EPD) technique.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image635-300x225.jpg\" alt=\"porous ceramic coating layer\" class=\"wp-image-36\" title=\"image635\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image635-300x225.jpg 300w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image635.jpg 372w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image5351-300x225.gif\" alt=\"Titanium substrate coated with a homogeneous layer of SCPC ceramic\" class=\"wp-image-37\" style=\"width:300px;height:auto\" title=\"image5351\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image5351-300x225.gif 300w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image5351.gif 352w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">Titanium substrate coated with a homogeneous layer of SCPC cerami<\/figcaption><\/figure>\n\n\n\n<p>SEM image of SCPC coating on Ti-6Al-4V foam vertebral implant. (left) SCPC nano-particles uniformly coated the outer surface as well as the entire thickness of the porous implant. (right)Cross-section analysis showed that SCPC coating forms a uniform coating thickness 3-5 mm (arrow) over the inner surfaces of the Ti alloy foam disc.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Development of bioactive fixation devices<\/h2>\n\n\n\n<p>Current orthopedic fixation devices are mainly made of metals such as stainless steel or titanium alloy. Metal implants have the drawbacks of eliciting immunological responses and stress shielding. Silica-Calcium Phosphate nano-Composite (SCPC) is a bioactive ceramic that bonds to bone and enhance bone tissue formation. SCPC can be tailored for a range of mechanical properties comparable to cortical and trabecular bone. A unique application of the SCPC implant is to manufacture orthopedic fixation devices such as screws.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"234\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image559-300x234.jpg\" alt=\"screw\" class=\"wp-image-30\" title=\"image559\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image559-300x234.jpg 300w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image559.jpg 380w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6251-300x225.jpg\" alt=\"view inside bone\" class=\"wp-image-42\" title=\"image6251\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6251-300x225.jpg 300w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6251.jpg 380w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<p>&nbsp;&nbsp;&nbsp; <\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>Preliminary results showed that SCPC is machinable and can be used for fabrication of various orthopedic screws. SCPC particles 45-150 mm were compacted into cylinders using powder metallurgy technique. The cylinders were thermally treated at 800 C in air, cooled to room temperature and then machined using turning and threading techniques on a manual lathe (left image). SEM analysis (right) of the microstructure of SCPC screw showed that SCPC particles were coated with a bioactive glassy phase.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>The Mechanical Properties of SCPC can be engineered using processing parameters such as thermal treatment and compact pressure.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"247\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6211-300x247.gif\" alt=\"Mechanical Properties of SCPC\" class=\"wp-image-41\" title=\"image6211\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6211-300x247.gif 300w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6211.gif 439w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Porous SCPC has demonstrated mechanical behavior comparable to that of trabecular bone upon compression loading.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>The figures below show the effect of processing parameters on the strength and modulus of elasticity of SCPC. Under all processing conditions, SCPC maintained mechanical properties within the range of cortical bone.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"833\" height=\"377\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6141.gif\" alt=\"two graphs of Mechanical Properties of SCPC.   compressive strength and modules of elasticity\" class=\"wp-image-38\" title=\"image6141\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6141.gif 833w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6141-300x135.gif 300w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Preservation of stem cells in resorbable bioactive scaffolds<\/h2>\n\n\n\n<p>The bioactive and resorbable nature of porous Silica Calcium Phosphate nano-Composite (SCPC) allowed the use of the material as a vehicle for stem cell preservation and delivery. SCPC-stem cell hybrid can provide an unlimited supply of readily available engineered bone tissue. Bone marrow mesenchymal stem cells loaded on porous SCPC scaffolds and cryo-preserved over liquid nitrogen were able to resume normal functionality of differentiated bone-forming cells (osteoblasts). The SCPC-stem cell hybrid can substitute autograft and allow rapid bone tissue growth in large bone defects, decrease surgery time, eliminate the need for a second surgery by virtue of the resorbability of the material.<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"169\" src=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6181-300x169.gif\" alt=\"graph of Thermal history of cryopreserved SCPC stem cell scaffold\" class=\"wp-image-40\" title=\"image6181\" srcset=\"https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6181-300x169.gif 300w, https:\/\/coefs.charlotte.edu\/arelgha\/files\/2011\/09\/image6181.gif 474w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<p>Thermal history of cryopreserved SCPC stem cell scaffold.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Coating of Metallic Implants with SCPC Bioactive Ceramic Coating orthopedic implants with bioactive ceramics has the potential to improve material-tissue integration and provide better fixation of the device. SCPC has been coated on Ti-6Al-4V as well as Co-Cr alloys using &hellip; <a href=\"https:\/\/coefs.charlotte.edu\/arelgha\/research\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":14,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-20","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/pages\/20","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/comments?post=20"}],"version-history":[{"count":5,"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/pages\/20\/revisions"}],"predecessor-version":[{"id":610,"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/pages\/20\/revisions\/610"}],"wp:attachment":[{"href":"https:\/\/coefs.charlotte.edu\/arelgha\/wp-json\/wp\/v2\/media?parent=20"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}