The retirement age has steadily increased over the past two decades and has not been below 65 years old since 2002.
Here is the average retirement age for U.S. dentists every year from 2001 to 2023:
2001: 64.7
2002: 64.7
2003: 65.4
2004: 65.2
2005: 66.1
2006: 66.3
2007: 67
2008: 66.4
2009: 67.2
2010: 67.9
2011: 67.8
2012: 67.8
2013: 68.1
2014: 68.3
2015: 68.4
2016: 68.7
2017: 68.6
2018: 68.9
2019: 68.6
2020: 68.5
2021: 68.1
2022: 68.1
2023: 68.9