Editing Chin augmentation (section)

== T-osteotomy method ==
T-osteotomy method (or mini V-line)<ref>{{Cite journal|last1=Lee|first1=Tae Sung|last2=Kim|first2=Hye Young|last3=Kim|first3=Takho|last4=Lee|first4=Ji Hyuck|last5=Park|first5=Sanghoon|date=October 2014|title=Importance of the Chin in Achieving a Feminine Lower Face|journal=The Journal of Craniofacial Surgery|volume=25|issue=6|pages=2180–3|doi=10.1097/scs.0000000000001096|pmid=25329849|s2cid=27463104|issn=1049-2275}}</ref> is used to narrow and lengthen the chin using an osteotomy technique formulated by Korean surgeons. The surgery is performed under general anesthesia (orotracheal intubation) using an intraoral approach.<ref name=":0">{{Cite journal|last1=Lee|first1=Tae Sung|last2=Kim|first2=Hye Young|last3=Kim|first3=Tak Ho|last4=Lee|first4=Ji Hyuck|last5=Park|first5=Sanghoon|date=March 2014|title=Contouring of the Lower Face by a Novel Method of Narrowing and Lengthening Genioplasty|journal=Plastic and Reconstructive Surgery|language=en|volume=133|issue=3|pages=274e–282e|doi=10.1097/01.prs.0000438054.21634.4a|pmid=24572871|s2cid=2679583|issn=0032-1052}}</ref> Using a double-bladed reciprocating saw,<ref name=":1">{{Cite journal|last=Lee|first=Tae Sung|date=December 2015|title=Standardization of surgical techniques used in facial bone contouring|journal=Journal of Plastic, Reconstructive & Aesthetic Surgery|volume=68|issue=12|pages=1694–1700|doi=10.1016/j.bjps.2015.08.010|pmid=26346781|issn=1748-6815}}</ref> a horizontal osteotomy is performed, leaving a small portion of bone in the middle. Then two vertical osteotomies are performed in an upside-down trapezoidal shape which is excised. The bones remaining from the horizontal osteotomy are then attached and adjusted to lengthen the chin, and advanced forward for an additional frontal chin projection if required.<ref name=":0" /> Pre-bent titanium plates and screws are used to fixate the bone to its new position.<ref name=":1" /> The chin can be lengthened 2 to 3&nbsp;mm on average.<ref>{{Citation|last=Park|first=Sanghoon|date=2017-06-14|pages=63–77|publisher=Springer Singapore|language=en|doi=10.1007/978-981-10-2726-0_8|isbn=9789811027253|title=Facial Bone Contouring Surgery|chapter=The Osseous Genioplasty}}</ref>

The mentalis muscles controls the elevation functions of the lower lip and chin, so extra caution should be taken to carefully attach the mentalis muscle back after the surgery.<ref>{{Citation|last=Lim|first=Jongwoo|date=2017-06-14|pages=7–13|publisher=Springer Singapore|language=en|doi=10.1007/978-981-10-2726-0_2|isbn=9789811027253|title=Facial Bone Contouring Surgery|chapter=Essential Surgical Anatomy for Facial Bone Contouring Surgery}}</ref><ref>{{Citation|last=Lee|first=Tae Sung|date=2017-06-14|pages=15–22|publisher=Springer Singapore|language=en|doi=10.1007/978-981-10-2726-0_3|isbn=9789811027253|title=Facial Bone Contouring Surgery|chapter=Surgical Approaches for Facial Bone Surgery}}</ref>