Jaw Surgery for a Receding Chin (Retrognathia, Skeletal Class II Malocclusion, or Mandibular Hypoplasia)
This orthognathic procedure (bone cutting and repositioning) addresses a recessed lower jaw. The mandible sits too far back and leads to:
- Difficulty chewing (misalignment between upper and lower molars and canines)
- Sleep apnea from airway obstruction
- Snoring
- Jaw clicking or pain related to temporomandibular joint (TMJ) dysfunction
- Facial asymmetry: the lower face tilts to one side in a front view
- Cosmetic concerns: receding or weak chin, double chin, aged appearance, short or long face, and disharmony between the jaws
Orthodontic treatment is typically required before and after surgery to optimize aesthetics and function (chewing and breathing). The surgeon usually advances the lower jaw (mandibular advancement), and in some cases also treats the upper jaw (maxilla), known as a bimaxillary osteotomy. Skeletal Class II malocclusion often appears with overall facial disproportions—either a “short face” (reduced vertical height) or a “long face” (excess vertical height). The procedure leaves no visible facial scars. The surgeon accesses the jaws through the mouth, makes gingival incisions, and uses dissolvable stitches.
Surgery takes place once bone growth is complete, typically at the end of adolescence. Earlier treatment generally allows a smoother recovery. Titanium plates and screws placed during surgery are not routinely removed. Titanium is biocompatible and does not trigger store or airport alarms.
Jaw Advancement Process (Orthodontics + Surgery)
Patients often see an orthodontist for severe bite misalignment. The orthodontist begins treatment with braces and coordinates with an oral and maxillofacial surgeon for the operation. Aesthetic outcome simulations are available using a profile photo on recessed-chin.com.
Next, the patient meets the surgeon, who explains the procedure and orders X-rays, CT scans, and 3D imaging.
Surgery details:
- Performed under general anesthesia
- Usually requires at least one night in the hospital
- After surgery, the orthodontist continues treatment to perfect tooth alignment
- One year after surgery, the patient typically has a well-aligned bite, a balanced profile, and a confident smile
What to Expect During Surgery
- Pre-surgery consultation with the anesthesiologist (at least 2 days prior)
- Preoperative workup (blood tests, imaging, etc.)
- Arrival at the hospital fasting
- Surgery lasts 1–2 hours, followed by 2–3 hours in recovery
- Most patients stay 1–2 nights in the hospital; some clinics offer outpatient surgery
- At-home rest for at least 7 days, with cold compresses, a liquid diet, and meticulous oral hygiene to prevent infection
Recovery Timeline
- Day 15: the jaw is “unlocked” by removing elastics; follow-up visit; start soft foods
- 3 months: most final results are visible; resume physical activity (except contact sports)
- 6 months: bones are fully healed
Cost of Lower Jaw Advancement Surgery
Total cost includes orthodontic treatment plus surgery. Prices range from $10,000 to $36,000 depending on case complexity and the professionals involved. Bimaxillary surgery (upper and lower jaws) costs more than mandibular-only procedures.
3D Planning Technology for Jaw Advancement
Many maxillofacial surgeons now use 3D imaging to scan the facial skeleton and plan surgical movements virtually. This software visualizes the procedure in three dimensions and confirms proper postoperative bite alignment.
A custom surgical splint is then 3D-printed and used during the operation. After the bone cuts, the splint helps the surgeon position the jaws precisely before fixation with titanium plates and screws.
