The lower jaw is formed not of several pieces, but of a cartilage called Meckel's cartilage, which in higher fishes precedes the development of a separate dentary bone.
The anterior part of each ramus is formed by the dentary bone (30), which carries the teeth.
The upper jaw in the Dipnoan is formed of palatal elements attached directly to the skull, and the lower jaw contains no true dentary bones.
The edge of the dentary rises above the bases of the teeth medially, thereby producing a small depression at the junction of each base with the dentary bone.
A portion of the lateral wall of the dentary surrounding the Meckelian canal is present.
One series of large teeth, with small ones external to them on the dentary bone.
Lying along the inner side of the dentaryis a large splint-like bone, the splenial (fig.
There is a bony operculum attached to the hyomandibular, and membrane bones representing respectively the maxilla and dentary are attached to the jaws.
There is often a fontanelle between the dentary and the posterior bones, while the angle is sometimes, as in the fowl, drawn out into a long curved process.
It extends back as far as the posterior end of the jaw and forwards for some distance dorsal to the dentary and splenial.
The teeth are in the dentary bone or bones, and these bones are almost always blended as in most birds and Turtles, and not separate from each other as among Crocodiles, Lizards, and Serpents.
It is scarcely possible to distinguish the remains of the toothed and toothless skeletons except in the dentary character of the jaws.
The dentary meets the angular in a long oblique suture; the dentarygradually tapers posterodorsally and ends on the dorsal surface of the angular.
The splenial also curves medially, and as stated, meets the dentary in a straight suture.
The dentarymeets the splenial dorsally in a straight suture.
The dentary is an unornamented bone with the anterior half curving medially; the greatest height is anterior.
Small teeth occur on the palatine and the pterygoid in the upper jaw and on the dentary in the lower jaw.
The dentary bone bears 17 curved teeth that decrease in size posteriorly.
The dentary lies external to the angular and extends from the mentomecklian to approximately the mid-length of the angular.
The angular and dentary of the lower jaw appear concurrently with the dentigerous bones.
Replacement teeth on the maxillary and dentary are present in the buccal tissue on the medial side of the bones, whereas on the palatines and pterygoids, the replacement teeth are present laterally.
The posterior half of the dentary overlies the fused surangular-prearticular part of the articular.
Ventrally, the posterior part of the dentaryunderlies the splenial, which is set in a median trench within the dentary.
Near the common suture of the dentary and the splenial is the large inferior alveolar foramen; completely within the splenial and ventral to the inferior alveolar foramen is the anterior mylohyoid foramen.
Dentition Teeth on the maxillary and pterygoid decrease in size posteriorly, whereas those of the dentarydo likewise except for the first one or two that are usually slightly smaller than those immediately posterior.
On the outside and distal part of the cartilage a dentary is usually developed, which may envelope and replace the cartilage to a larger or smaller extent.
In Mammalia thedentary is the only element present (vide p.
The mandible, which is edentulous in front, has only two or three small teeth in the middle of the dentary bone.
The Order Plectognathi (Family Gymnodontes) includes the genera Diodon, Tetrodon and Triodon, globular fishes, in which the jaw is transformed into a beak and furnished with a sharpdentary plate.
Abrasion of the sides of the inner maxillary and outer dentary teeth indicates that tooth-to-tooth contact did occur.
The muscle passed into the Meckelian fossa of the mandible and inserted on the angular, surangular, prearticular, coronoid and dentary bones.
Teeth are present in the jaws of all known Stegocephalia and Apoda and of nearly all Caudata, Siren alone presenting plates of horn upon the gingival surfaces of the premaxillae and of the dentary elements of the mandible.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "dentary" in a variety of sentences. We hope that you will now be able to make sentences using this word.
