When determining the posterior limit of the maxillary denture, the hamular notch is on the posterior border.

The recommended time for developing an X-ray film at a solution temperature of 20 degrees Celsius is 4.5 minutes. This time may vary slightly depending on the specific developing solution and film type, but 4.5 minutes is the commonly suggested time to ensure proper exposure and development.

Dental amalgam has been a traditional restorative material for many years, known for its durability and strength. However, there is a growing trend towards the use of more aesthetic materials, such as composites and glass ionomers, which blend better with natural tooth structure.

Muscles involved in centric relation are temporalis and masseter.

Folic acid deficiency is most commonly due to inadequate dietary intake or increased metabolic demand, such as during pregnancy.