Explanation: In the arrangement of teeth in a complete denture, the mandibular first premolar is typically positioned with its mesial aspect in contact with the lateral aspect of the mandibular canine. This is part of the denture setup to ensure proper occlusal relationships and aesthetics.

Zinc oxide-eugenol temporary cement typically sets in about 5-10 minutes.

House classification is based on the mental attitude of the patient.

Long-term functional changes around teeth can lead to osteoporosis in the alveolar bone, which is characterized by a decrease in bone density. This can affect the support of the teeth. 

Sodium hypochlorite is commonly used as an irrigating solution with ultrasonic instruments in endodontic treatment for its antimicrobial properties. It helps in the cleaning and disinfection of the root canal system by removing organic debris and bacteria. Normal saline, hydrogen peroxide, and chloramine are also used as irrigants, but sodium hypochlorite is the most effective in eliminating bacteria.