Dental Implants - Greenfields 1913 implant system was one of the earliest successful endosseous implants. - Ancient civilizations like China and Egypt attempted to replace missing teeth with implants made of materials like bamboo and precious metals. - Wilson Popenoe discovered a Mayan woman with missing incisors replaced by pieces of sea shells. - Titanium was first used as an implantable material by Bothe, Beaton, and Davenport in 1940. - Per-Ingvar Brånemark observed bone growth around titanium screws, leading to the concept of osseointegration. - Root form implants are the most common type, with different shapes and surface textures. - Zygoma implants are long implants that anchor to the cheek bone and can retain a complete upper denture. - Small diameter implants are low-diameter implants used for denture retention or orthodontic anchorage. - Ceramic implants made from alumina were introduced but later replaced by zirconia implants. - Robot-assisted dental surgery, including for dental implants, has been developed in the 2000s.

Dentures - Pierre Fauchard described the construction of dentures using a metal frame and animal bone teeth in 1728. - Etruscans in northern Italy made partial dentures out of human or animal teeth fastened with gold bands. - Wooden full dentures were invented in Japan in the early 16th century. - Beeswax was used to create impressions for wooden dentures, which were later carved from wood, human teeth, or other materials. - Gold and silver dentures were created by Ambroise Paré for the French King Charles IX in 1579. - The first porcelain dentures were made around 1770 by Alexis Duchâteau. - Nicholas Dubois De Chemant, assistant to Duchateau, received the first British patent for artificial teeth in 1791. - Peter de la Roche in 17th century London is believed to be one of the first operators for dentures. - Dentures were made with porcelain paste supplied by Wedgwood. - Wooden dentures continued to be used in Japan until the 19th century. - The use of leaf springs in dentures was described by Pierre Fauchard in 1728. - Advancements in denture materials allowed for more natural-looking and durable dentures. - Modern dentures are made using a variety of materials like acrylic, porcelain, and composite resin. - Denture technology has improved with the development of CAD/CAM systems for precise fitting. - Implant-supported dentures provide a more stable and comfortable option for edentulous patients.

Early Dental Treatments - Dental work was often performed by goldsmiths, ivory turners, or barber-surgeons. - Samuel Stockton, a goldsmith, manufactured high-quality porcelain dentures in 1820. - Dentures made of Vulcanite, a hardened rubber, were introduced in the 1850s. - Acrylic resin and other plastics became popular materials for dentures in the 20th century. - In 1968, 79% of those aged 65-74 in Britain had no natural teeth, but by 1998, this proportion decreased to 36%.

George Washington's Dental Problems - Washington lost his first adult tooth at the age of twenty-two. - Historians suggest that mercury oxide, used to treat his illnesses, contributed to his tooth loss. - He had several sets of false teeth made, none of which were made from wood. - The set he wore as president was made from hippopotamus and elephant ivory. - Washington's dental problems caused him constant pain and he took laudanum for relief.

Charles Darwin's Dental Problems - Darwin experienced dental problems from an early age due to repeated vomiting. - The regurgitation of gastric acid caused tooth erosions. - He visited a dental practitioner in Hobart in 1836 and needed a denture repair during his voyage. - In 1852, Darwin had five molars removed under chloroform, one of the earliest records of dental anaesthesia. - His dental issues were a result of his lifelong illness and seasickness aboard HMS Beagle.

Advancements in 3D Printing and Dentistry - 3D printing and imaging have revolutionised dentistry in the past 50 years. - Stereolithography (SLA) technique, developed in 1986, is used for modeling, prosthetics, and orthodontic models. - Digital Light Processing (DLP) was created in 1987 and is used for custom dental molds and medical equipment. - SLA uses an ultraviolet laser to cure liquid polymer resin into layers. - DLP utilizes 3D printing machines that accept CAD files and cures the resin with a digital light source.

Dental Applications of 3D Printing Technology - 3D printing has been used to create toothbuds that resemble real teeth. - Other applications include dental modeling, digital orthodontics, medical modeling, and drilling and cutting guides. - 3D printing technology is also used for partial denture frameworks. - Custom fit medical equipment can be created using 3D printing. - The advancements in 3D printing have expanded the possibilities in dentistry.