Introduction
If you have a significant bite problem or jaw misalignment, your orthodontist or surgeon might suggest orthognathic surgery. This is a sophisticated surgical procedure that corrects your upper and/or lower jaw to improve function, appearance, and dental bite. It's not just braces—it's repositioning your actual jaw bones. This guide explains what bimaxillary surgery (both jaws) involves, why it helps, and what your journey looks like from planning through recovery.
When You Might Need This Surgery
You're a candidate for orthognathic surgery if: your upper and lower jaws are severely misaligned; your bite is severely off (underbite, overbite, or crossbite); your teeth can't close properly; you have difficulty chewing or swallowing; you have sleep apnea related to jaw position; or your jaw is asymmetrical (uneven). Learn more about Benefits of Anesthesia Types for additional guidance.
Bimaxillary Surgery Specifically: This means both your upper jaw and lower jaw need repositioning. Your surgeon does both procedures in one surgery, or sometimes staged (separate surgeries a few months apart).The Planning Process
3D Imaging: You'll get detailed 3D scans of your skull and jaws. This lets your surgeon see exact bone position and movement needed. Virtual Planning: Your surgeon uses computer software to simulate the planned jaw movements. You might even see what your face will look like afterward. Braces First: Before surgery, you'll wear braces for 12-18 months. This aligns your teeth within your current jaws. This prep work is critical for success—it's not cosmetic, it's necessary. Surgical Guides: Your surgeon creates special guides and plates based on your virtual plan. These ensure precise positioning during surgery. Expected Improvements: You'll see improved chewing function, better appearance (especially profile), better breathing (less snoring, better sleep apnea), and complete bite correction.Understanding the Surgical Procedures
Upper Jaw (Le Fort I): Your surgeon makes a cut inside your mouth above your teeth, separates your upper jaw from your skull, moves it to the correct position, and secures it with small plates and screws. You'll heal with the jaw in its new position. Lower Jaw (Bilateral Sagittal Split): Your surgeon makes cuts inside your mouth at the angle of your jaw, carefully splits the jawbone, moves it forward or backward, and secures it with plates and screws. Timing: Both surgeries happen while you're under general anesthesia in one operative session. You're unconscious the entire time.What Happens During Recovery
First Week: Pain peaks around day 2-3, swelling peaks day 3. Your jaw is mostly immobilized (using elastic bands connecting upper and lower teeth) for the first 4-6 weeks. You'll eat soft foods through a straw or blender. Weeks 2-6: Swelling gradually resolves. Pain decreases. You can start gentle jaw opening exercises. Your surgeon might adjust the elastic bands to allow gradual movement. Weeks 7-12: You transition to regular soft diet. Swelling is mostly resolved. Jaw function improves significantly. Return to normal diet by week 12. Months 3-6: Final bite refinement with braces (your surgeon coordinates with your orthodontist). You might have slight asymmetries that need fine-tuning.Pain and Swelling
Pain: Expect pain for 7-10 days that's controlled with prescribed pain medicine. It's usually less intense than people expect. Swelling: Significant for the first 2-3 weeks, gradually improving over months. Your face looks different immediately post-op but improves dramatically over 2-3 months as swelling goes down. Numbness: Common after lower jaw surgery (affecting lower lip and chin). Usually resolves within 2-8 weeks. Permanent numbness is rare.Risks and Complications
Relapse: Your jaw might move slightly back toward its original position. Modern surgery and fixation minimize this (usually <10% of movement). Nerve Damage: Temporary numbness is common. Permanent numbness is rare (<2%). Bite Issues: Early post-op bite is corrected with elastic bands and braces. Infection: Uncommon with proper antibiotics and care.What You Can't Do
- Chew hard or crunchy foods for 12 weeks
- Heavy exercise or contact sports for 4-6 weeks
- Smoke (increases complications significantly)
- Drink alcohol for 7-10 days
- Use straws for 48 hours (suction affects healing)
- Rinse vigorously for 24 hours
Important Timeline
- Month -18 to -12: Braces to align teeth in current jaw
- Month -3 to -1: Final surgical planning and preparation
- Month 0: Surgery day
- Months 1-3: Rapid recovery and swelling reduction
- Months 3-6: Braces for final bite refinement
- Year 1+: Wearing retainers to maintain results
Expected Outcomes
Functional: Excellent chewing, no more difficulty swallowing, often improved breathing. Appearance: Significant improvement in facial profile, better balance, improved smile. Psychological: Most people report major confidence boost and life improvement. Stability: Research shows 85-90% of surgical correction remains stable long-term.What to Expect During Your Visit
Your dentist will begin by examining your mouth and reviewing your dental history to understand your current situation. This evaluation may include taking X-rays or digital images to get a complete picture of what is happening beneath the surface. Based on these findings, your dentist will explain the recommended treatment approach and walk you through each step of the process.
During any procedure, your comfort is a top priority. Your dental team will make sure you understand what is happening and check in with you regularly. Modern dental techniques and anesthesia options mean that most patients experience minimal discomfort during and after treatment. If you feel anxious about any part of the process, let your dentist know so they can adjust their approach to help you feel more at ease.
Tips for Long-Term Success
Maintaining good results after dental treatment requires consistent care at home and regular professional check-ups. Brushing twice daily with a fluoride toothpaste and flossing at least once a day forms the foundation of good oral hygiene. These simple habits go a long way toward protecting your investment in your dental health and preventing future problems.
Your dentist may recommend additional steps specific to your situation, such as using a special rinse, wearing a nightguard, or adjusting your diet. Following these personalized recommendations can make a significant difference in how well your results hold up over time. Scheduling regular dental visits allows your dentist to catch any developing issues early, when they are easiest and least expensive to address.
Every patient's situation is unique. Talk to your dentist about the best approach for your specific needs.Conclusion
Bimaxillary orthognathic surgery is a sophisticated, well-established procedure that fixes serious jaw and bite problems. Recovery takes time (plan on 3-4 months for substantial improvement, 6-12 months for complete resolution), but results last. Your life after surgery—better function, better appearance, better confidence—makes it worthwhile for people who need it.
> Key Takeaway: Orthognathic surgery corrects jaw position and bite that braces alone can't fix. Learn more about Benefits of Anesthesia Options for additional guidance. It requires planning, patience during recovery, and commitment to post-op care, but results transform function and appearance.