School of Dentistry, dental hygiene clinic, 1970s. (OHSU)

Dental school dedication,1956. (OHSU)

Dental school construction, 1955. (OHSU)

Dental school construction, 1954. (OHSU)

A concrete pulverizer painted to look like a dinosaur takes giant bites out of the former OHSU School of Dentistry building on Marquam Hill, February 3, 2018. The tool was painted specifically for the OHSU demo project because of the construction site's close proximity to OHSU Doernbecher Children's Hospital. (OHSU/Kristyna Wentz-Graff)

A concrete pulverizer painted to look like a dinosaur takes giant bites out of the former OHSU School of Dentistry building on Marquam Hill, February 3, 2018. The tool was painted specifically for the OHSU demo project because of the construction site's close proximity to OHSU Doernbecher Children's Hospital. (OHSU/Kristyna Wentz-Graff)

A concrete pulverizer painted to look like a dinosaur takes giant bites out of the former OHSU School of Dentistry building on Marquam Hill, February 3, 2018. The tool was painted specifically for the OHSU demo project because of the construction site's close proximity to OHSU Doernbecher Children's Hospital. (OHSU/Kristyna Wentz-Graff)

A concrete pulverizer painted to look like a dinosaur takes giant bites out of the former OHSU School of Dentistry building on Marquam Hill, February 3, 2018. The tool was painted specifically for the OHSU demo project because of the construction site's close proximity to OHSU Doernbecher Children's Hospital. (OHSU/Kristyna Wentz-Graff)

The former OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

The former OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

Interior demolition at the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

Tubes from the pneumatic delivery system in the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

Interior demolition at the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

Interior demolition at the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

A large chalkboard in a lecture hall, of the former OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

A support system is installed to support the hillside as demolition continues at the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

Interior demolition at the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)

Old mailboxes in the OHSU School of Dentistry building on Marquam Hill, August 17, 2017. A two-year demolition project is under way to remove the 1956 building. The building has sat vacant since the School of Dentistry moved into the Skourtes Tower on the South Waterfront in 2014. (OHSU/Kristyna Wentz-Graff)