Sumita Mitra

Last updated
Sumita Basu Mitra
Alma mater Presidency College Calcutta
University of Calcutta
University of Michigan
Scientific career
Institutions 3M
Case Western Reserve University
University of South Florida
Thesis Cross-linking of proteins by equilibrium transfer alkylation.  (1977)

Sumita Basu Mitra (born 1949) is an Indian-American inventor who is a professor at the University of South Florida. She developed the nanomaterials used in state-of-the-art 3M dental composites, which have been used in billions of procedures around the world. She is a Fellow of the National Academy of Engineering, National Academy of Inventors and the National Inventors Hall of Fame.

Contents

Early life and education

Mitra was born in India, where she spent her childhood. [1] She was an undergraduate student at Presidency College Calcutta and majored in chemistry. [2] [3] After graduating, she joined the University of Calcutta for a master's degree in chemistry. [2] She moved to the United States for graduate studies and specialized in polymer chemistry. She was based at the University of Michigan, where she worked alongside Richard Lawton. She joined Case Western Reserve University as a postdoctoral fellow in polymer chemistry. [4]

Research and career

In 1978, Mitra joined 3M, where she worked as a senior chemist focusing on materials for health care. She specialized in nanotechnology, adhesion science and surface chemistry. [5] In particular, she focused on the realization of smart materials to help in dentistry. [6] At the time, dentists performed tooth repairs using a combination of two different materials, microfills and microhybrid composites. [4] Mitra designed the nanomaterials-based filler platform that 3M uses for all state-of-the-art dental restoratives. [7] Nanoparticles ('nanomeric filler particles') within these materials imitate the natural enamel of teeth, which allow them to remain glossy and strong. She showed that these materials could be used to restore teeth in any area of the mouth. These platforms enabled the realization of the Filtek composites. [6] These composites have been used in hundreds of millions of procedures around the world. The first generation of the composites were launched in 2002 and the second generation in 2005. [8]

After retiring from 3M in 2010, Mitra established her own consulting company. She joined the Institute for Advanced Discovery at the University of South Florida in 2021. [9] Mitra holds almost one hundred patents in nano composites and dental adhesives. [8]

Awards and honors

Selected publications

Related Research Articles

Dental restoration, dental fillings, or simply fillings are treatments used to restore the function, integrity, and morphology of missing tooth structure resulting from caries or external trauma as well as to the replacement of such structure supported by dental implants. They are of two broad types—direct and indirect—and are further classified by location and size. A root canal filling, for example, is a restorative technique used to fill the space where the dental pulp normally resides.

<span class="mw-page-title-main">Glass ionomer cement</span> Material used in dentistry as a filling material and luting cement

A glass ionomer cement (GIC) is a dental restorative material used in dentistry as a filling material and luting cement, including for orthodontic bracket attachment. Glass-ionomer cements are based on the reaction of silicate glass-powder and polyacrylic acid, an ionomer. Occasionally water is used instead of an acid, altering the properties of the material and its uses. This reaction produces a powdered cement of glass particles surrounded by matrix of fluoride elements and is known chemically as glass polyalkenoate. There are other forms of similar reactions which can take place, for example, when using an aqueous solution of acrylic/itaconic copolymer with tartaric acid, this results in a glass-ionomer in liquid form. An aqueous solution of maleic acid polymer or maleic/acrylic copolymer with tartaric acid can also be used to form a glass-ionomer in liquid form. Tartaric acid plays a significant part in controlling the setting characteristics of the material. Glass-ionomer based hybrids incorporate another dental material, for example resin-modified glass ionomer cements (RMGIC) and compomers.

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References

  1. "Alumna Sumita Mitra Inducted into National Inventors Hall of Fame | U-M LSA Chemistry". lsa.umich.edu. Retrieved 2021-12-19.
  2. 1 2 "Dr. Sumita Mitra -" . Retrieved 2021-12-19.
  3. "European Inventor Award 2021". BhaskarChakravorti. 2021-06-19. Retrieved 2021-12-19.
  4. 1 2 "Women in dentistry: Meet Dr. Sumita Mitra..." Dental Tribune International. 2021-08-11. Retrieved 2021-12-19.
  5. 1 2 "ACS Honors Heroes Of Chemistry 2009". cen.acs.org. Retrieved 2021-12-19.
  6. 1 2 "The National Academy of Engineering elects former 3M scientist, Sumita B. Mitra". 3M. 2021-03-10.
  7. "Mitra". www.epo.org. Retrieved 2021-12-19.
  8. 1 2 "NIHF Inductee Sumita Mitra Invented Tooth Filling Material". www.invent.org. Retrieved 2021-12-19.
  9. "Three USF faculty members selected as new National Academy of Inventors Fellows". www.usf.edu. December 7, 2021. Retrieved 2021-12-19.
  10. "3M CARLTON SOCIETY – Members" (PDF). 3M.
  11. "3M's Sumita Mitra Wins American Chemical Society's Regional Industrial Innovation Award for Breakthrough Dental Restorative". 3M News Center. Retrieved 2021-12-19.
  12. "The Indian-American chemist won the 2021 European Inventor Award - Commonwealth Union" . Retrieved 2021-12-19.
  13. "2 Indian-American innovation pioneers inducted into Inventors Hall of Fame". The Economic Times. Retrieved 2021-12-19.
  14. "National Academy of Engineering Elects 104 Members and 24 International Members". NAE Website. Retrieved 2021-12-19.
  15. Office, European Patent. "Dental nanomaterials trailblazer Sumita Mitra receives European Inventor Award 2021 in the "Non-EPO countries" category". www.epo.org. Retrieved 2021-12-19.
  16. "European Inventor Award 2021: Interview with finalist Sumita Mitra". Startup Terminal. 2021-05-28. Retrieved 2021-12-19.
  17. Inventors, National Academy of. "National Academy of Inventors Announces 2021 Fellows". www.prnewswire.com. Retrieved 2021-12-19.