Stage 3 NREM, also known as slow-wave sleep, is characterized by delta waves on EEG and is associated with the lowest body temperature, decreased heart rate, and decreased muscle tone, indicating a deep restorative sleep state.

For extraction of mandibular molar, anaesthesia is given to act on the inferior alveolar nerve.

The salivary glands having purely mucous secretions are palatine.

Secondary occlusal trauma primarily relates to occlusal discrepancies or effects on tooth mobility due to periodontal attachment loss rather than localized gingival inflammation alone.

Heating a gypsum cast to a temperature above 90°C will remove water of crystallization and strengthen it. This process is called "burning out" the gypsum, and it is used to remove the remaining moisture and improve the cast's stability and accuracy.

Gypsum casts are made by mixing plaster of Paris (calcium sulfate hemihydrate) with water. When the material sets, it forms calcium sulfate dihydrate crystals with water molecules trapped within the crystal lattice, known as water of crystallization. Heating the cast above 90°C causes the water of crystallization to be released, which results in the cast becoming stronger and more rigid. This process does not cause the cast to expand but rather to shrink slightly as the water is removed. Excess gauging water is typically removed during the initial setting process.