Final answer:
On Trina's first visit, Dr. McTeague filled her tooth with gold, using various dentistry tools that caused her discomfort.
Step-by-step explanation:
Dr. McTeague filled Trina's tooth with gold on her first visit. The operation included the use of hard-bits, ho_e-excavators, and half-cone burrs to enlarge the cavity. The process was so uncomfortable that it caused Trina to wince and moan, and Dr. McTeague felt anguish at having to inflict pain on her, despite the necessity of the procedure in his role as a dentist. This scene forms a part of the building relationship between Trina and McTeague, which is further complicated by McTeague's romantic feelings for Trina, highlighting the intersection of their personal and professional interactions.