Peri-Implant Therapy for the Dental Hygienist. Susan S. Wingrove

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these concerns. A fundamental understanding of key terms and statistics associated with implant dentistry will also be a valuable tool to add to your verbal skills when talking with patients about tooth replacement.

      Similar discoveries were made in Egypt, artifacts that date back to the 1700s. Ivory and the bones of animals were also sometimes used to replace missing teeth. It would be decades after these archeological discoveries before the modern world caught up with the Mayans' and Egyptians' dental technology.

      Reprinted with permission from Ring (20).

      Dr. John Greenwood made a set of dentures for Washington made of hippopotamus ivory and eight real human teeth attached by brass screws. The denture, which was anchored on the one remaining tooth in Washington's mouth, has a hole that fits snugly around the one tooth. Dr. Greenwood was noted to be quite ahead of his time in his dental practice, extracting teeth, and utilizing them in the manufacture of dentures, but he also experimented with implantation.

      Courtesy of Rick Blanchette.

      In the 18th century, researchers experimented with gold and other metal alloys including lead as implants. Dr. Maggiolo fabricated gold implants that were placed in sockets where teeth had recently been extracted and after a healing period attached a donor tooth. Dr. Harris, a physician, attempted the same procedure with a platinum post, both had poor results.

      Dr. Edmunds in 1886 was the first in the United States to implant a porcelain crown mounted on a platinum disc and presented at the First District Dental Society of New York. Other metal alloys with porcelain crowns were experimented with, but these implants did not have a long‐term success rate.

      Dr. E.J. Greenfield, pioneer of the endosseous implant, provided many of the basic concepts of nascent field of implantology. He was known for his patented hollow‐cylinder implants made of wire soldered with 24 karat gold. This hollow‐basket design was a similar design that Straumann Implant Company from Switzerland adopted many years later. He presented his research and surgical technique in 1913, and although histological proof of bone‐to‐implant contact was not available at that time, he understood the clinical importance to what he called primary stability or osseointegration. His surgical techniques, stepwise use of drill diameters starting with round bur, were presented in 1913 and are still practiced today (3).

      It was not until 1937 before the first relatively long‐term implant success was noted. Dr. A.E. Strock used the metal alloy Vitallium®, placing a series of implants at Harvard University in animals and humans. He published a paper on the physiological effects of Vitallium in bone, with no postoperative complications or reactions noted, total toleration. These were the first relatively successful dental implants and certain types of implants are still cast in Vitallium today.

Photograph of Professor Per-Ingvar Brånemark, an orthopedic surgeon.

      Courtesy of Nobel Biocare.

      In 1964, commercial‐grade pure titanium was accepted as the material of choice for dental implants. Other bodies of medicine (i.e., joint replacements) had recognized the fact that the body does not recognize titanium as a foreign material, which results in higher success rate and fewer rejections. Eventually, the use of commercial pure titanium evolved into the use of titanium alloys (TiAl6V4 being the most commonly used) due to experimentation and improved durability.

      In 1981, Dr. Per‐Ingvar Brånemark published his findings covering all the data on the animal and human clinical trials: success rate, concept, and the design of endosteal root‐form titanium implants most commonly placed today. In an effort to gain international support and collaboration, based on patient care with sound biological and clinical principles Brånemark founded the Association of Brånemark Osseointegration Centers (ABOC).

      Brånemark identified the edentulous patient as an amputee, an oral invalid, to whom we should pay total respect and rehabilitation ambitions. He was also instrumental in identifying the mouth as a much more important part of the human body than medicine and controlling

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