Helictites are, perhaps, the most delicate of cave formations. They are usually made of needle-form calcite and aragonite. Forms of helictites have been described in several types: ribbon helictites, saws, rods, butterflies, hands, curly-fries, and clumps of worms.. They typically have radial symmetry.
The temporomandibular joint (TMJ) is the joint where the mandible articulates with the cranium (Fig 8.1). The following characteristics make the TMJ a complex and unique joint: 1  It is classified as a compound joint even though it does not include three bone structures in the articulation.
Torus mandibularis (pl. tori mandibulares) (or mandibular torus (pl. mandibular tori) in English) is a bony growth in the mandible along the surface nearest to the tongue.Mandibular tori are usually present near the premolars and above the location of the mylohyoid muscle 's attachment to the mandible.orus mandibularis (pl. tori mandibulares) (or mandibular torus (pl. mandibular tori) in English) is a bony growth in the mandible along the surface nearest to the tongue.