Is it mandatory to send physical models/Impressions?

Located in the frontier of China's Reform and Opening ---Shenzhen, Shenzhen Zhiya Technology Co., Ltd has provided 5-year warranty prostheses & services to dentists and dental laboratories around the world since the year 2009. ZDL uses the highest quality materials to provide excellent and well-fitting restorations at reasonable prices to ensure our clients' complete satisfaction. Our full-service dental lab fabricates a wide variety of prostheses, including CAD/CAM crowns & bridges, acrylic & flexible dentures and metal-based dentures, orthodontic appliances & retainers, and implants & attachments from most major manufacturers of high-quality hybrid products.