This trial is testing if applying a special liquid called silver diamine fluoride (SDF) before dental procedures can help numb teeth better and reduce pain for patients with sensitive teeth due to a condition called molar-incisor hypomineralization (MIH). MIH makes teeth more sensitive and harder to treat with regular anesthesia. SDF works by blocking tiny holes in the teeth and making them stronger, which could help make dental treatments less painful. SDF has been used for many years to control early childhood cavities, stop root cavities, prevent various types of cavities, reduce tooth sensitivity, strengthen weak teeth, prevent dental erosion, detect decayed tissue during treatment, and manage infected root canals.