Which of these structures or substances in the skin helps prevent UV radiation from damaging deep structures of the skin? 

Which of the following describes the penetration site for a facial approach to a maxillary nerve block?

A) Height of the mucobuccal fold over the distobuccal aspect of the maxillary second molar B) Height of the mucobuccal fold distal to the zygomatic process C) Lateral to the height of the mucobussal fold posterior to the zygomatic bone of the maxilla D) Lateral to the height of the mucobuccal fold over the mesiobuccal aspect of the maxillary second molar

The final portion of the PDCA cycle of quality improvement is a cost-benefit analysis.

Answer the following statement true (T) or false (F)