Hayes Nance (August 14, 1893 - April 3, 1964) was an American

orthodontist Orthodontics is a dentistry specialty that addresses the diagnosis, prevention, management, and correction of mal-positioned teeth and jaws, and misaligned bite patterns. It may also address the modification of facial growth, known as dentofacial ...

known for his contributions to topics related to mixed dentition. Nance is known for developing

serial extraction Serial extraction is the planned extraction of certain deciduous teeth and specific permanent teeth in an orderly sequence and predetermined pattern to guide the erupting permanent teeth into a more favorable position. History In 1929, Kjellgre ...

in United States, as well as pioneering the development of the Nance Appliance.

Life

Nance was born in 1893 in

Jackson, Tennessee Jackson is a city in and the county seat of Madison County, Tennessee, United States. Located east of Memphis, Tennessee, Memphis, it is a regional center of trade for West Tennessee. Its total population was 68,205 as of the 2020 United States ...

, the youngest of five children. After his mother died in 1908, Nance attended the

Webb School of Knoxville Webb School of Knoxville is a private coeducational day school in Knoxville, Tennessee, enrolling students from pre-kindergarten to twelfth grade. It was founded in 1955 by Robert Webb (1919–2005), grandson of Webb School of Bell Buckle found ...

, Tennessee. During his childhood, he was involved in an accident while working in a

copper mine Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, loca ...

Miami, Florida Miami ( ), officially the City of Miami, known as "the 305", "The Magic City", and "Gateway to the Americas", is a East Coast of the United States, coastal metropolis and the County seat, county seat of Miami-Dade County, Florida, Miami-Dade C ...

. While working, Hayes suffered a fall which led to several fractures including a spinal injury. He married Julia Manning. He attended Northwestern University Dental School in 1919 and practiced for a short time in Arizona. He then eventually moved to Denver and opened his own practice. He retired in 1948. He married Florence Hays in 1956. He died in 1964 at his home in

Pasadena, California Pasadena ( ) is a city in Los Angeles County, California, northeast of downtown Los Angeles. It is the most populous city and the primary cultural center of the San Gabriel Valley. Old Pasadena is the city's original commercial district. I ...

due to a heart attack. Florence died in 1955 also due to a heart attack.

Orthodontics

Nance wrote a paper in 1947 titled ''Limitations of Orthodontic Treatment'' that was the culmination of his 17 years of orthodontia. Nance described the concept of "leeway space". This space is usually found in human teeth after the permanent premolars in each arch have erupted. It is about 3.5mm in mandibles and 2mm in the maxillary arch. The adult premolar teeth are smaller than their predecessors, primary first and second molars. Therefore, the space that is naturally created, is usually taken up by the movement of the permanent first molar moving mesially. Nance showed that the combined width of mandibular deciduous canines, first molar and second molar is on average 1.7mm greater than that of the permanent successors on one side. The maxillary arch occupies about 1mm on each quadrant. Nance developed the Nance Appliance, which is used to prevent upper first molars from moving forward after the maxillary first primary molar has been prematurely lost.

Recognition

* Diplomate of American Board of Orthodontics * Charles H. Tweed Foundation - President, Honorary Member * Southern California Component of Edward H. Angle Society of Orthodontia - President, Honorary Member * Albert H. Ketcham Memorial Award (1963)

References

{{DEFAULTSORT:Nance, Hayes American orthodontists People from Jackson, Tennessee 1893 births 1964 deaths 20th-century dentists