What is LeFort BSSO?
LeFort 1: this operation moves the upper jaw in any direction. All incisions are inside the mouth. Bilateral sagittal splint osteotomy (BSSO): this operation moves the lower jaw in any direction. All incisions are inside the mouth, except for a very small 3mm incision on each cheek.
Does jaw surgery change Gonial angle?
Results: After surgery, the gonial angle had decreased in all patients. Decrease in the gonial angle in the VRO group was greater than the BSSO group. The average decrease in the gonial angle was significantly more (P < 0.05) in the VRO group (7°) than in the BSSO group (2°).
Why BSSO is done?
A bilateral sagittal split osteotomy (BSSO) is a surgery aimed at correcting a lower jawbone that is too short or too long. This procedure can improve functions such as biting or speaking, and can radically improve a person’s appearance.
How long is BSSO surgery?
For single jaw procedures, the mean operating time for a Le Fort I osteotomy (n= 42) was 82.2 min and for a bilateral sagittal split osteotomy (BSSO) (n= 102) was 80.3min. Bimaxillary osteotomy combined with genioplasty (n=17) this increased the operating time on average by 31 min.
What is the perfect jawline angle?
Although the perfect jawline differs widely for men and women. For men, the jawline is wider, and the angle should be around 90 to 100 degrees. For women we want a slimmer jawline to help create a more heart shaped or oval facial shape. The angle should ideally be around 120 degrees.
How do you increase the angle of the mandible?
To reduce the width of the chin, a narrowing genioplasty can be performed with a T-shaped bone segment resection. To increase the height of the chin while narrowing the width, the resected bone segment from the chin or mandibular angle can be grafted.
How is BSSO done?
A Bilateral Sagittal Split Osteotomy (or BSSO) is a type of jaw surgery where the lower jaw is separated from the face and repositioned. This repositioning is also called orthognathic surgery. The virtual patient in the CIVA demonstration has a protruding jaw which will be set back using a BSSO.
What is visor osteotomy?
The visor osteotomy is performed from canine to canine. The bone fragment pedicled to the lingual periosteum is coronally mobilized and fixed in the new position. Preserved vascularization is supposed to minimize the amount of bone resorbed.
How is a BSSO performed?
What is gonial angle?
Physico-forensic anthropometry: Here, the gonial angle was measured as the angle formed by the base of the mandible and posterior border of ramus by the scale of protractor, which is placed over the angle of the mandible in such a way that basic line or base of protractor coincides with the base of the mandible.
Does jaw surgery affect cheekbones?
Modern techniques allow us to reduce, augment, and reshape the facial bones. The chin can be advanced or reduced, the cheekbones can be enhanced, the jawline can be remodeled as well as the forehead and orbits (bones around the eyes). This allows for a new dimension in cosmetic surgery.
What is the vertical Ramus?
The vertical ramus osteotomy is a procedure whereby full thickness osteotomies of the rami are performed. When performed bilaterally they divide the mandible into two smaller condyle bearing segments and a large segment consisting of the anterior ramus and mandibular body including the teeth and chin.