Journal of the history of dentistry最新文献

A full account of early research that led to the discovery of the Alpha-diketone and Amine systems by two Imperial Chemical Industries (ICI) researchers. UK Chemists in the mid-sixties marked the beginning in the early development of a composite resin cured with visible light spectrum into a solid mass. Its incorporation into the newly developed Urethane based resin, led to conceiving the idea of developing the first light-activated restorative composite resin, which formed the prototype of modern composite restorative materials. How all that came about, and the ideas that were conceived and pursued in the development of these systems are discussed in detail.

"See Your Dentist Twice a Year" is the standard of care today honored by dentists, requested by patients, and covered by insurance. Where is the scientific evidence to support this dictate? Several systematic reviews could find no support for or against it. When did it start? This paper traces the timeline of the statement and its appearance in toothpaste advertisements. It was first spotted in 1890 as part of a household guide for beauty preservation. Subsequently, the idea became a tagline in dental advertisements for Colgate Ribbon Toothpaste, Dr. Lyon's Dentifrice from 1913, and Pepsodent toothpaste starting in 1926.

A full account of the preceded early research tribulation that led to the development of the first visible light activated composite resin and the first visible light activator source is documented. The events took place over four years since early 1974 when a raw industrial composite resin that was radiolucent, stiff paste, universal optically opaque white color, polymerized by exposure to a prototype visible light for 120 seconds was given to developed. Four years later, the developed restorative composite resin ended up as a radiopaque, optically translucent, universal color with an additional three shades that possessed the biologic, esthetic, mechanical and physical characteristics with proven efficacy be used for esthetic zone. This conservative account of early development of a technology that must count as one of a small number of inventions during the seventies, over the years has revolutionized restorative dental practice. We were privileged and very lucky to be associated with developmental stages, stumbling blocks, and final success of the first LC Composite resin that ignited the thought process worldwide and laid the foundation for modern esthetic restoratives practiced today.

The evolution of 20-year-old dental museum-like showcases located in the lobby and the main hallway of the School of Dental Medicine, Puerto Rico (PR) are described along with important professionals who impacted on this development.

University of Toronto Dentistry alumni have made valuable contributions to the evolution of dentistry and the dental profession not only in Canada but also internationally. The founder and some of the early faculty members of West China College of Stomatology at Sichuan University (formerly the Dental School of West China Union University), known as the birthplace of China's modern dental science education, were alumni from the University of Toronto. With their excellent dental background, skills, and dedication, those pioneers laid a firm foundation for modern dental education in China and their contributions to this effort will be addressed in this paper.

Historically the physiological or pathological loss of tooth structure in situ was deemed to be due to the 'absorption' of tooth structure due to the removal of the inorganic components of dentin and cementum by osteoclastic (dentinoclastic) cellular activity. This nomenclature and the activity that it represented was considered by almost all dental researchers and clinicians in the 1800s and early 1900s. The shift to the concept of 'resorption' occurred in the first half of the 20th century, with clarity emanating from significant research activity on the pathology of osseous structures, origin of osteoclastic cell types, and the function of periodontal ligament cells.

Two prominent personalities in Medicine, Lorenz Heister (1683-1758) and Xavier Bichat (1771-1802), compete for the attribution of the discovery of the buccal fat pad (BFP). A careful reading of the original texts reported here, seems to identify Bichat as the first to describe the BFP. However, Heister most probably was the first to describe an accessory parotid gland.

If one could be a patient repeatedly, every twenty-five years, starting in 1825, the evolution and comparison of dental care and dental practice would be historically meaningful. Such a time travel, as a perpetual patient through 200 years, is the purpose of this paper. The changes that occurred over 200 years provide a sense of the progress in treating patients and the transformation of a painful and dreaded experience to a highly sophisticated painless profession.

For more than a century, at least, tooth extraction by ingenious mechanical contraptions has piqued the interest and imagination of illustrators, especially cartoonists. George Derby, an unknown British talent, and Ruben Garrett Lucius "Rube" Goldberg all dabbled in oral surgical mechanical humor.