Jaw surgery itself typically takes 1 to 4 hours in the operating room, depending on whether one or both jaws are being repositioned. But if you’re asking “how long is jaw surgery” in a broader sense, the full process from braces to final healing spans roughly 2 to 3 years. Here’s what each phase actually looks like in terms of time.
How Long the Operation Takes
A single-jaw procedure (upper or lower jaw only) generally runs 1 to 2 hours of surgical time. Double-jaw surgery, where both the upper and lower jaw are repositioned in the same operation, takes 2 to 4 hours. These times reflect the actual cutting, repositioning, and plating of bone, not the additional time spent on anesthesia and preparation.
3D virtual surgical planning has shortened the process noticeably. In a study of 40 patients, virtual planning cut overall working time compared to conventional methods, with the biggest time savings in double-jaw cases. The reduction comes from pre-fabricated surgical guides and digitally planned bone movements, which means less decision-making in the operating room.
Orthodontic Preparation Before Surgery
Most people don’t realize that jaw surgery requires months of orthodontic work beforehand. Braces or aligners need to move your teeth into positions that will align properly once the jaw bones are repositioned. A retrospective study found the median duration of this pre-surgical orthodontic phase was 17 months, with a range of 7 to 47 months. Patients should realistically expect 12 to 24 months in braces before surgery day arrives.
This phase can feel frustrating because your bite may actually look or feel worse before surgery. That’s intentional. The orthodontist is positioning teeth for where the jaw will be after surgery, not where it is now.
Hospital Stay
According to Cleveland Clinic, most patients stay in the hospital for one to three days after jaw surgery, though some go home the same day. A study tracking hospital stays over five years found the average dropped from 5 days to 3.7 days as surgical techniques improved. Across the literature, reported hospital stays range from about 1 to 8 days, with the trend moving shorter over time.
The First 6 Weeks of Recovery
The initial healing phase lasts about six weeks, and it’s the most restrictive period. For the first two weeks, swelling, limited mouth opening, and numbness make eating extremely difficult. You’ll be on a fully liquid diet, drinking everything through a syringe or straw. Your jaw will be held in its new position with small titanium plates and screws, and in some cases with elastic bands connecting your upper and lower braces.
Between weeks 2 and 4, you’ll transition to soft foods and start using a small fork and drinking from a normal cup. By 4 to 6 weeks, most people gradually return to their normal diet, though anything that requires heavy chewing is still off limits.
Most patients return to work or school within 2 to 4 weeks. Light activity like walking is encouraged early on, but heavy lifting and intense exercise need to wait until your surgeon clears you, typically around 6 to 8 weeks.
Swelling Timeline
Swelling peaks around 48 to 72 hours after surgery and can make your face nearly unrecognizable for the first week. A volumetric study tracking post-surgical swelling found that about 60% resolves within the first month. At six months, roughly 84% of swelling has resolved. That remaining 16% is subtle, often only noticeable to you, and it continues to improve gradually over the following months.
Your face won’t look like its final result for quite some time. Many surgeons advise patients not to judge their appearance until at least 6 months post-surgery.
Bone Healing and Full Recovery
The bones themselves take 3 to 6 months to fully fuse in their new position. During this window, the titanium plates and screws do the structural work while new bone grows across the surgical cuts. You won’t feel this process happening, but it’s the reason for restrictions on contact sports and hard foods during the first several months.
Full recovery, meaning complete bone healing, final settling of the bite, and a return to normal jaw function, generally takes 6 months to a year. Post-surgical orthodontics to fine-tune tooth alignment typically continues for another 6 to 12 months after the operation.
Nerve Sensation Recovery
One of the longest-lasting effects is altered sensation. Nearly all patients experience some numbness in the lower lip, chin, or cheek area immediately after surgery. This happens because the nerves running through the jaw bones are stretched or bruised during repositioning.
Recovery of feeling is gradual and unpredictable. At 6 months post-surgery, more than two-thirds of patients in one study still reported some degree of numbness in facial areas or around the mouth. About half continued to have reduced sensitivity in their lips at that point. Some patients regain full sensation within a year, while others are left with permanent areas of mild numbness. Sensory retraining exercises, where you practice stimulating the numb areas with different textures, can improve outcomes. In the same study, 37% of patients who did sensory retraining reported no remaining problems at 6 months, compared to 22% who only did standard jaw-opening exercises.
Total Timeline at a Glance
- Pre-surgical orthodontics: 12 to 24 months
- Surgery day: 1 to 4 hours in the operating room
- Hospital stay: 1 to 3 days
- Liquid and soft diet: 4 to 6 weeks
- Return to work or school: 2 to 4 weeks
- Swelling mostly resolved: 1 to 6 months
- Bone fully healed: 3 to 6 months
- Nerve sensation recovery: 6 months to over a year
- Post-surgical orthodontics: 6 to 12 months
From the start of braces to the removal of braces after surgery, the entire process typically spans 2 to 3 years. The surgery itself is a single day, but the commitment around it is measured in months.