Chin augmentation using surgical implants can alter the underlying structure of the face, providing better balance to the facial features. The specific medical terms mentoplasty and genioplasty are used to refer to the reduction and addition of material to a patient’s chin. This can take the form of chin height reduction or chin rounding by osteotomy, or chin augmentation using implants. This operation is often, but not always, performed at the time of rhinoplasty to help balance the facial proportions. Chin augmentation may be achieved by manipulation of the jaw bone (mandible) and augmentation utilizing this technique usually provides a more dramatic correction than with the use of prosthetic implants. 
Chin implants are to build a better profile. Patients’ own bone is donated from ribs and from part of the pelvis (the ilium.) Use of donated bone implants in chin augmentation, even the patient’s own, appears to be associated with a higher rate of infection, even after the implant has been in place for decades. Chin augmentation is still popular because it is a relatively easy operation for the patient while producing noticeable changes in the silhouette of the face. This type of surgery is usually performed by an oral and maxillofacial surgeon, otolaryngologist, or plastic surgeon. 
Darkcircles Dark circles are caused due to various reasons. Often heredity causes dark circles. People who are born with thinner skins under their eyes often expose the dark veins underneath and they appear as dark circles. Fatigue and shortage of sleep also causes dark circles. Sinus problems and pregnancy are also causes of dark circles. The bony structure of the skull into which eyes are deeply set can also develop shadows typically called the dark circles. As sunlight increases the pigmentation level it causes under eye tanning and thus dark circles. Some medications cause dilated blood vessels which when revealed through the lighter under eye skins seem to be dark and cause dark circles. Shortage of some essential nutrients in diet can also cause dark circles. Hormonal imbalances as a product of menstruation, pregnancy or menopause can also cause dark circles. The skin under the eyes also turns dark as we advance in age.