Versions of Oregon Statutes 680.020 - Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement on LawServer 2023 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement 2021 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement 2019 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement 2017 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement 2015 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement 2013 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement 2009 Oregon Statutes 680.020 – Practice of dental hygiene without license prohibited; applicability of dental hygiene license requirement