Hayes Nance

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

He retired in 1948. He married Florence Hays in 1956. He died in 1964 at his home in Pasadena, California 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.^[2] 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