Fractured Lowered Jaw
This page gives you information about the surgery you are about to have to repair your fractured lower jaw.
If you have any further questions, please ask a member of the Oral and Maxillofacial team or contact us on the phone number at the end of this page.
For further information, please visit the Oral and Maxillofacial surgery pages
The problem
Your lower jaw has been broken. The number of fractures, where they have happened and whether they need surgery (an operation) to help them heal has already been decided by the doctor who examined you. If surgery is necessary, the fractured bones will be held in the correct place while healing. This will make sure that your teeth meet together correctly and pain is kept to the minimum.
If surgery is not carried out when recommended it is likely you will suffer significant pain and infection and the bones may not heal in the correct position. Your teeth may not meet together correctly as a result causing pain, infection and problems when eating.
What does the operation involve?
The operation that is about to take place involves a general anaesthetic which means you will be asleep during the procedure.
Once you are asleep the site of the fracture will be opened up. This involves making a cut on the inside of your mouth through the gum.
The broken bones are then put back together and held in place with small metal plates and screws. The gum is stitched back into place with dissolvable stitches. The stitches can take 2 weeks or longer to dissolve.
During the same operation, it is often necessary to place wires or metal braces around your teeth so that elastic bands can be attached to them to guide your bite into the correct position after surgery. Screws inserted into the jawbone above the teeth are sometimes used instead of these wires or metal braces. Any elastic bands are not usually attached until the day after your operation so your jaws will be able to move freely when you wake up from the surgery.
Condylar fractures
It is very important that you have a soft diet and avoid opening your jaw wide for at least 5 to 6 weeks. This will allow healing to take place.
If the break in your lower jaw is at the part of the jaw near the joint (a condylar fracture) depending on the position of the fracture the following surgical options will apply:
- An operation to fix the broken bone with plates and screws
- An operation using metal bars/screws and elastic bands as detailed above
If you are suitable for option 1 you must follow the aftercare instructions carefully as the bone in this area is thin and can be damaged with large jaw movements.
This operation often involves making a cut on the side of your face, in front of your ear. If this is necessary then there is between a 6 and 20% chance of damage to the nerve that is responsible for moving the muscles in this part of your face.
This is most often temporary and will improve as healing progresses. In some rare cases it can be permanent.
Will anything else be done while I am asleep?
Occasionally it is necessary to remove damaged or decayed teeth at the site of the fracture. In very difficult fractures it is sometimes necessary to make a cut on the outside of the mouth through the skin.
If this is going to take place, the site and size of the cut will be discussed with you before you sign the consent form for your operation.
What can I expect after the operation?
You are likely to need to stay in hospital for one night following the surgery. The following day the position of your fractures will be checked with X-rays before you are allowed home.
You are likely to feel sore and have some discomfort after the operation which is usually worse for the first few days. This can last for up to 2 weeks. Pain relief will be arranged for you while you are in hospital.
To make sure that the fractures heal without any infection you will be given antibiotics through a vein in your arm while you are in hospital. On discharge from hospital you will be sent home with pain relief and a course of antibiotics which you must complete. You will also be prescribed a mouth wash.
Although the plates and screws hold the fractures in place, it still takes around 6 weeks for your lower jaw to heal completely. During this time, you need to eat a relatively soft diet. This will be discussed with you by the doctors, nurses and dieticians. It is also important to keep your mouth clean and that you brush your teeth carefully and thoroughly for the first few weeks after surgery. This will help to stop any infection.
It may be difficult to clean your teeth around the stitches because it will be sore. It is best to keep the area free from bits of food by gently rinsing your mouth with the mouthwash prescribed or warm salt water (dissolve a flat teaspoon of kitchen salt in a cup of warm water) starting the day after surgery.
If any wires, metal braces or screws are used to help guide your bite into the correct position, they will be removed in the outpatient department when your doctors are happy that your fracture has healed.
Do I need to take any time off work?
Your doctor will discuss this with you before discharge. Depending on the nature of your work, it may be necessary to take 2 or more weeks off work and to avoid strenuous exercise during this time.
It is important to remember that you should not drive or operate machinery for 48 hours after your general anaesthetic.
What are the possible problems?
- Infection is uncommon because antibiotics are used to reduce the chances of infection.
- Bleeding from the cuts inside your mouth is unlikely to be a problem. Should the area bleed when you get home this can usually be stopped by applying pressure over the site for at least 10 minutes with a rolled up handkerchief, clean tea towel or gauze swab.
- There is a nerve that runs through the centre of the lower jaw that supplies feeling to your lower lip, chin and bottom teeth. This nerve may have been bruised at the time of the fracture and as a result you might already feel some tingling or numbness in your lip and/or chin. This tingling may also be caused or made worse by surgery. In the majority of people the numbness gets better on its own although it can take several months to do so. In some circumstances, it can be permanent.
- Occasionally teeth next to the fracture site may be damaged by the screws that are used.
- If it has been necessary to put any plates or screws in your jaw to hold it in position these are not normally removed unless they get infected because they tend not to cause problems. The metal that is used is titanium which does not set off metal detectors in airports etc.
Will I need further appointments?
A review appointment will be arranged before you leave hospital.
It is usual to keep a close eye on you for several weeks following treatment to make sure that your jaw heals correctly.
Further follow-up appointments may be arranged to review your progress.
Contact information
If you have any concerns after your surgery please contact the Hospital Switchboard on Tel: 0300 422 2222. Ask for the ‘operator’ when prompted then please ask to be put through to the ‘on-call senior house officer for Oral and Maxillofacial Surgery’.
Oral and Maxillofacial Department
New and follow-up clinic enquiries
Tel: 0300 422 6940
Monday to Friday, 9:00am to 4:30pm
Minor surgery (local anaesthetic with/without sedation)
Booking enquiries
Tel: 0300 422 3197
Monday to Friday, 9:00am to 4:30pm
Inpatient and Day Surgery Unit
Booking enquiries
Tel: 0300 422 8191
Tel: 0300 422 8192
Monday to Friday, 9:00am to 4:30pm