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The suffix "-flexus / -flexid" (upper molar / lower molar) is used for the open valleys in the occlusal surfaces of the hypsodont teeth. When this valleys are enclosed, they are called fossetes/fossetids (upper molar / lower molar). Sometimes they are used also for the folds of the teeth, although the proper name for the folds is sulcus (pl ...
The uppercase letters A through T are used for primary teeth and the numbers 1 - 32 are used for permanent teeth. The tooth designated "1" is the maxillary right third molar ("wisdom tooth") and the count continues along the upper teeth to the left side. Then the count begins at the mandibular left third molar, designated number 17, and ...
It was theorized that positive selection for shovel-shaped incisors over the spatulate incisors is more commonly found within cultures that used their teeth as tools due to a greater structural strength in increased shovel-shaped incisors. [2] In some instances, incisors can present a more pronounced version of this called double shovel-shaped.
Usually, there are 20 primary ("baby") teeth and 32 permanent teeth, the last four being third molars or "wisdom teeth", each of which may or may not grow in. Among primary teeth, 10 usually are found in the maxilla (upper jaw) and the other 10 in the mandible (lower jaw). Among permanent teeth, 16 are found in the maxilla and the other 16 in ...
Macroscopically, these lines can be seen on the labial surface or lip side of anterior or front teeth as horizontal lines on the tooth crown, also known as perikymata or "imbrication lines" . [ 1 ] Evenly spaced Retzius lines indicate a 6- to 11-day cycle of enamel formation.
The term anterior teeth refers to incisors and canines, as opposed to premolars and molars, which are posterior teeth. [1] Apical The direction toward the root tip(s) or apex(es) of a tooth (the apices), as opposed to coronal, which refers to the direction toward the crown. It may also refer to something relating to the roots, such as apical ...
The legs are also yellowish brown. The abdomen is fawn coloured in females with three dark-brown chevron shaped markings on the rear half. In males, the abdomen is a light mauvish grey, with a pale stripe in the middle of the upper surface of the front half. In the rear half, they have three paler chevron shaped markings. [1] [2]
True to its name, Paranthropus robustus had a more massive jaw and teeth than Homo species. In addition, the species had thicker enamel than any hominid species from the time. There is also evidence from muscle markings on jaws that robustus would have had a diet that was based on hard, tough to chew foods in times of nutritional stress.