Title: Radius (bone)
Content:  at the back part of the [[radial tuberosity|tuberosity]], and its upper part is rounded and indistinct; it becomes sharp and prominent as it descends, and at its lower part divides into two ridges which are continued to the anterior and posterior margins of the ulnar notch. To the posterior of the two ridges the lower part of the interosseous membrane is attached, while the triangular surface between the ridges gives insertion to part of the pronator quadratus muscle. This crest separates the volar from the dorsal surface, and gives attachment to the interosseous membrane. The connection between the two bones is actually a joint referred to as a syndesmosis joint. The volar surface (facies volaris; anterior 
Title: Sagittal crest
Content:   A sagittal crest is a ridge of bone running lengthwise along the midline of the top of the skull (at the sagittal suture) of many mammalian and reptilian skulls, among others. The presence of this ridge of bone indicates that there are exceptionally strong jaw muscles. The sagittal crest serves primarily for attachment of the temporalis muscle, which is one of the main chewing muscles. Development of the sagittal crest is thought to be connected to the development of this muscle. A sagittal crest usually develops during the juvenile stage of an animal in conjunction with the growth of the temporalis muscle, as a result of convergence and gradual heightening of the temporal lines.
Title: Radius (bone)
Content:   The long narrow medullary cavity is enclosed in a strong wall of compact bone. It is thickest along the interosseous border and thinnest at the extremities, same over the cup-shaped articular surface (fovea) of the head. The trabeculae of the spongy tissue are somewhat arched at the upper end and pass upward from the compact layer of the shaft to the fovea capituli (the humerus's cup-shaped articulatory notch); they are crossed by others parallel to the surface of the fovea. The arrangement at the lower end is somewhat similar. It is missing in radial aplasia. The radius has a body and two extremities. 
Title: Frontal crest
Content:  The internal surface of the squamous part of the frontal bone is concave and presents in the upper part of the middle line a vertical groove, the sagittal sulcus, the edges of which unite below to form a ridge, the frontal crest; the sulcus lodges the superior sagittal sinus, while its margins and the crest afford attachment to the falx cerebri.
Title: Body of sphenoid bone
Content:  The anterior surface of the body [Fig. 2] presents, in the middle line, a vertical crest, the sphenoidal crest, which articulates with the perpendicular plate of the ethmoid, and forms part of the nasal septum. On either side of the crest is an irregular opening leading into the corresponding sphenoidal air sinus. These sinuses are two large, irregular cavities hollowed out of the interior of the body of the bone, and separated from one another by a bony septum, which is commonly bent to one or the other side. They vary considerably in form and size, are seldom symmetrical, and are often partially subdivided by irregular bony laminae. Occasionally, they extend into the basilar part of the occipital bone nearly as far 
Title: Zhuchengtitan
Content:  on the portion of the shaft further inward than the crest. Near the top end on the back of the bone, there are two depressions bordering a central ridge, which extends upwards to support the rounded humeral head. On the bottom of the bone, the two condyles that articulate respectively with the radius and ulna are separated by a broad but shallow intercondylar groove, and there is a low but robust ridge on either side of the groove. These structures are more prominent in Saltasaurus and Opisthocoelicaudia. The condyles are expanded towards the front of the bone; viewed from the bottom, the surface of the condyles is very roughened.
Title: Linea aspera
Content:  The linea aspera (rough line) is a ridge of roughened surface on the posterior surface of the shaft of the femur. It is the site of attachments of muscles and the intermuscular septum. Its margins diverge above and below. The linea aspera is a prominent longitudinal ridge or crest, on the middle third of the bone, presenting a medial and a lateral lip, and a narrow rough, intermediate line. It is an important insertion point for the adductors and the lateral and medial intermuscular septa that divides the thigh into three compartments. The tension generated by muscle attached to the bones is responsible for the formation of the ridges.
Title: Zhuchengtitan
Content:  of the bone, which is angled more sharply inwards at the top end of the bone than the bottom end. Further below, the shaft of the bone is cylindrical in cross-section, with the long axis oriented sideways. The deltopectoral crest, which is located on the front surface near the top end of the bone, is very prominent, and bears a hook-like process about 1⁄3 of the way down its length. It extends downwards to the midshaft of the bone, and sideways so that it occupies the outer 2⁄5 of the bone's width. In Opisthocoelicaudia, the crest is wider, occupying 1⁄2 of the bone's width. The humerus forms a wide 
Title: Sphenoid bone
Content:  Sphenoidal crest articulates with the perpendicular plate of ethmoid leading to formation of a part of the septum of nose.
Title: Sagittal keel
Content:  A sagittal keel, or sagittal torus, is a thickening of part or all of the midline of the frontal bone, or parietal bones where they meet along the sagittal suture, or on both bones. Sagittal keels differ from sagittal crests, which are found in some earlier hominins (notably the genus Paranthropus) and in a range of other mammals. While a proper crest functions in anchoring the muscles of mastication to the cranium, the keel is lower and rounded in cross-section, and the jaw muscles do not attach to it. Sagittal keels occur in several early human species, most noticeably in Homo erectus, occasionally in Homo heidelbergensis and 

Question: the radiographic term used to describe the dense bone of the socket and septal crest is?
Answer: lamina dura.
alveolar process.
the lamina dura.