Search results
Results From The WOW.Com Content Network
A cleft chin is an inherited trait in humans and can be influenced by many factors. The cleft chin is also a classic example of variable penetrance [20] with environmental factors or a modifier gene possibly affecting the phenotypical expression of the actual genotype. Cleft chins can be presented in a child when neither parent presents a cleft ...
Changes to the dental morphology and jaw are major elements of hominid evolution. These changes were driven by the types and processing of food eaten. The evolution of the jaw is thought to have facilitated encephalization, speech, and the formation of the uniquely human chin.
The mental nerve can be blocked with local anesthesia.This can be used in surgery of the chin, the lower lip, and the buccal mucosa from midline to the second premolar.In animals, it can be used in surgery of the lower lip, [2] and lower teeth anterior to the site of administration. [3]
Anatomy of the human head. The human head consists of a fleshy outer portion, which surrounds the bony skull.The brain is enclosed within the skull. There are 22 bones in the human head.
The mentalis muscle causes a weak upward-inward movement of the soft tissue complex of the chin. [2] This raises the central portion of the lower lip. [2] In the setting of lip incompetence (the upper and lower lips not touching each other at rest), the contraction of the mentalis muscle can bring temporary but strained oral competence.
Paranthropus aethiopicus' sagittal crest on top of the head. 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.
Functional appliances can be used in growing children to help modify bad habits and neuro-muscular function, with the aim of correcting this condition. [6] Alveolar prognathism can also easily be corrected with fixed orthodontic therapy. However, relapse is quite common, unless the cause is removed or a long-term retention is used. [7]
The angle of the mandible (a.k.a. gonial angle, Masseteric Tuberosity, and Masseteric Insertion) is located at the posterior border at the junction of the lower border of the ramus of the mandible.