Reposition, mm of the lower jaw in the area of the body angle

At UKRMED Clinic in Kyiv, fractures of the mandibular angle and body are assessed by looking at fragment position, bite and stability of the jaw. When the bone has shifted and cannot be held reliably in position, treatment may include direct reduction followed by fixation with plates and screws.

A fracture near the angle of the lower jaw can be deceptive. The face may be swollen, of course, but sometimes the more useful clue appears when the patient closes the mouth. The teeth meet on one side first. A familiar bite suddenly feels unfamiliar.

That happens because a mandibular fracture is not a static crack in the bone. Muscles attached to the jaw continue pulling on the fragments after the injury. If one section moves, even slightly, the entire dental arch can feel different.

Why the angle and body of the mandible matter

The mandibular body carries much of the lower dental arch. Behind it comes the mandibular angle, where the bone turns upward towards the ramus. This transition is important during fracture treatment.

One bone fragment may remain almost where it was before the injury. The neighbouring segment can rotate or shift under muscle pull. On a CT scan, the change might look modest; when the patient bites, it can be obvious.

So the surgeon is not interested only in where the fracture line runs. Jaw length, contour and tooth contact all help to show whether the original relationship has been lost.

What is mandibular osteosynthesis?

Mandibular osteosynthesis means stabilising repositioned bone fragments with an internal fixation system.

First comes reduction.During mandibular fracture reduction, the fragments are brought back into a position that restores the shape of the jaw and, whenever possible, the patient’s previous bite.

The bone is then secured with fixation screws and plates. Titanium plates are commonly used for this purpose. Their job is simple: keep the reconstructed fragments from shifting again while biological bone healing takes place. The hardware supports the repair. It does not replace it.

Planning the position before fixation

The bite gives the surgeon one set of information. Imaging gives another. For a displaced fracture, CT can show the direction in which a fragment has moved, whether more than one fracture is present and how the fracture relates to nearby teeth and the mandibular canal.

That last point matters because the sensory nerve to the lower lip and chin travels through the jaw. The fracture may also pass close to a tooth root or directly through the tooth-bearing part of the mandibular body. These details are considered before the final fixation position is chosen. A plate that looks neat on an image is not enough by itself. The teeth still need to meet in a functional relationship.

When does metal osteosynthesis become useful?

Not every mandibular angle fracture needs internal fixation. A stable injury with little displacement and a preserved bite may be managed differently. The situation changes when the bone fragments move independently, the bite cannot be restored reliably or several fracture sites make the mandible unstable.

Imagine a fracture in the body and another closer to the angle. The section between them can behave almost like a separate piece of jaw. In that situation, mandibular fracture surgery gives the surgeon direct control over fragment position before the plates are applied.

This is the main advantage of internal fixation: stability is created at the bone itself rather than relying only on external control of the bite.

After the operation

The first part of recovery is usually about swelling, food and jaw movement. Hard chewing is restricted for a period of time. Mouth opening can feel stiff, especially during the first days, and patients are usually more comfortable with softer food. Follow-up is not limited to checking the incision. The surgeon looks at tooth contact, jaw movement, discomfort and sensation in the lower lip. Imaging may also be used when required.

Chewing load is increased gradually as the fracture becomes more stable. There is no useful single timetable for every patient. A simple mandibular body fracture and a multiple displaced injury do not behave in exactly the same way.

Mandibular fracture treatment at UKRMED

At UKRMED in Kyiv, the treatment plan is based on the actual mechanics of the injury.

Where is the fracture? Has the fragment rotated? Is the mandibular angle stable? Has the bite changed? Those answers help determine whether closed treatment is enough or whether open reduction with metal osteosynthesis provides a more predictable result.

A bite that changes after facial trauma, unusual movement of the lower jaw or new numbness of the lip should therefore be assessed rather than explained away by swelling alone.