A dentist’s office typically conjures generic, isolated spaces. In this 4,000-square-foot site, a building was reinforced and adapted, with new construction sitting inside the old and acknowledging the former at the points of attachment, making its relative material thinness apparent. Steel partitions separate five dental stations in a semi open plan. Shield-like plywood-and-steel towers house equipment for the operating room, where the patient’s arm reach radius dictates dimensions, lending a human scale. In the waiting area, a lack of rectilinear forms and plentiful shadows create a calm space. Light enters everywhere from indirect sources, changing the spaces over time.