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Prior to the development of modern dentistry, there was no treatment for this condition; those who had it simply endured it. Today, the most common treatment for mandibular prognathism is a combination of orthodontics and orthognathic surgery. The orthodontics can involve braces, removal of teeth, or a mouthguard. [19]
Robinson (1913) [3] suggests that the demand to resist masticatory stresses triggered bone thickening in the mental region of the mandible and ultimately formed a prominent chin. Moreover, Daegling (1993) [4] explains the chin as a functional adaptation to resist masticatory stress that causes vertical bending stresses in the coronal plane.
Features distinguishing Weaver syndrome from Sotos syndrome include broad forehead and face, ocular hypertelorism, prominent wide philtrum, micrognathia, deep-set nails, retrognathia with a prominent chin crease, increased prenatal growth, and a carpal bone age that is greatly advanced compared to metacarpal and phalangeal bone age. [12]
Chin augmentation with a chin implant is usually a cosmetic procedure. An incision is made either under the chin or inside the lower lip, a pocket is made and the implant placed into the pocket. Some chin implants are fixed to the mandible, while others are held in place by the pocket itself.
The symphysis of the external surface of the mandible divides below and encloses a triangular eminence, the mental protuberance, the base of which is depressed in the center but raised on either side to form the mental tubercle. The size and shape of the bones making up this structure are responsible for the size and shape of a person's chin.
Archaic humans are distinguished from anatomically modern humans by having a thick skull, prominent supraorbital ridges (brow ridges) and the lack of a prominent chin. [ 11 ] [ 12 ] Anatomically modern humans appeared around 300,000 years ago in Africa , [ 4 ] [ 5 ] [ 6 ] and 70,000 years ago gradually supplanted the "archaic" human varieties.
Craniofacial and other features of LFS include: maxillary hypoplasia (underdevelopment of the upper jaw bone), [9] a small mandible (lower jaw bone) and receding chin, [3] [17] a high-arched palate (the roof of the mouth), with crowding and misalignment of the upper teeth; [5] [7] macrocephaly (enlarged skull) with a prominent forehead, [3] [9 ...
Treacher Collins syndrome (TCS) is a genetic disorder characterized by deformities of the ears, eyes, cheekbones, and chin. [5] The degree to which a person is affected, however, may vary from mild to severe. [5] Complications may include breathing problems, problems seeing, cleft palate, and hearing loss. [5]