Company Filing History:
1 out of 86 
1 out of 42 Years Active: 2009
Title: Innovations of Toshimasa Ohnishi in Dental Materials
Introduction
Toshimasa Ohnishi is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of dental materials, particularly through his innovative patent related to glass ionomer cement. His work focuses on enhancing the properties of dental cements to improve their performance and usability.
Latest Patents
Ohnishi holds a patent for a two paste-type glass ionomer cement. The objective of this invention is to provide a cement composition that retains essential characteristics such as adhesion to tooth substance, biocompatibility, surface curability, and fluorine sustained-releasability. This innovation addresses the shortcomings of conventional glass ionomer cement by reducing water sensitivity and enabling a simple mixing operation. The cement comprises a resin-based paste containing a hydrophobic polymerizable monomer and a polymer of acidic group-containing polymerizable monomers, along with a water-based paste containing a hydrophilic polymerizable monomer and water. An acid reactive filler is included in at least one of the pastes, ensuring stable properties regardless of the operator's skill level.
Career Highlights
Throughout his career, Toshimasa Ohnishi has worked with prominent companies in the dental materials industry. He has been associated with Kabushikikaisha Shofu and Nagase Chemtex Corporation, where he contributed to the development of innovative dental products. His expertise in the field has led to advancements that benefit both dental professionals and patients.
Collaborations
Ohnishi has collaborated with notable colleagues such as Satosi Takano and Toshiyuki Nakatsuka. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas in the field of dental materials.
Conclusion
Toshimasa Ohnishi's contributions to dental materials, particularly through his patent for a two paste-type glass ionomer cement, highlight his commitment to improving dental care. His work continues to influence the industry and enhance the quality of dental treatments.