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Double fracture of the lateral part of the body of the mandible on one side
05-09-2009
Such change is possible in the place of application of force, when the blow suffered by the lateral division. It should be remembered that at a greater distance between the lines of fracture displacement of the fragments with unilateral double fracture more pronounced. The most significant is the case when the fracture line runs in the chin department and in the molars. In this case, there are three fragments of different sizes. Big is half of the lower jaw with the uninjured side, the second largest - the angle and the branch on the side of the jaw fracture and the third (smaller) - the average otlomok. On each of them attached unequal number of muscles that causes the severity of displacement of bone fragments.
The displacement of bone fragments also depends on the location of the fracture gap and the direction of its slant. The mechanism it is not significantly different from the above. However, the average otlomok (less) tend to be shifted inward and downward under the influence of jaw-hyoid muscle and the applied force. Rarely, he shifted outwards. In this position he may hold two large fragments, has remained on the direction to each other. Big otlomok shifted down and to the side of fracture. Angle and the branch of the mandible on the side of the fracture are pulled upward and anteriorly displaced inside the muscle lifting the lower jaw, all of which are attached to the fragments (chewable, temporal, lateral and medial pterygoid). In this case, it is difficult reponirovat fragments and to fix them in the correct position, especially the angle and the branch of the mandible on the side of the fracture.
With multiple fractures of the mandible displacement of fragments seems chaotic. In fact, it has its own laws and entirely dependent on the traction of muscles attached to them, the mass of bone fragments, damaging power lines, the localization of the fracture gap and bevel plane fracture. Average fragments can turn around inside, go for each other, catch up or move up down. This may be accompanied by a rupture of the mucous membrane of the alveolar process, marked malocclusion. Possible fractures and dislocations of the teeth. Often fragments are displaced as a result of free rupture of the muscles. In such fractures often significant soft tissue injury, traumatic brain injury.
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Articles for theme "fracture of the jaw":
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05-09-2009
Character displacement of fragments is largely determined by the location of the fracture plane and the direction of its slant, depending on the direction and force of impact. In the case of passing the fracture line between the premolar vertically relative to the sagittal axis of the central otlomok could significantly down-down and shift backwards, bend over the alveolar part of the forward and lateral fragments may climb up. Alveolar part of their turns inward, and the base body of the mandible - outwards.
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05-09-2009
This combination occurs quite often. This results in three fragments: condylar processus on the one hand, the body of the mandible and the branch - on the other, and the average - a branch of a broken jaw condylar process and the body of the mandible.
Clinically prevalent signs of a fracture of the body of the jaw, and therefore its definition is not difficult. It therefore can not be promptly diagnosed condylar fracture of the appendix from the opposite side. It is connected with the fact that the violation of bite, so typical of the condylar fracture of the process, is not observed.
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05-09-2009
Bilateral fracture of the mandible fracture means two different halves of it. Double fracture of the mandible - were two fractures on one half of the jaw. Multiple fracture of the mandible - a combination of bilateral and double its fractures.
Bilateral condylar fracture of the appendix occurs most frequently when struck on the chin from front to back. In addition to the complaints listed above, with a bilateral fracture patients report pain trestle in front of the ear on both sides. They can not bite the food front teeth.
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05-09-2009
Damage condylar sprouts in second place in the structure of mandibular fractures. This is due to the fact that when struck on the chin from front to back is broken neck mandibular condylar sprouts, and in case of application of force to the lateral parts of the body, the branches or the chin to the most vulnerable is the base condylar sprouts, along with the angle of the mandible. The mechanism of fracture and in fact and in another case - the bend. Should be recalled that near the base of the appendix condylar cross-sectional area of bone in the lateral (naruzhnovnutrennem) direction is much less than in the anteroposterior.
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05-09-2009
There are actually branches of fractures of the mandible, coronoid and condylar processes it. Fracture of the actual branches of the mandible in the horizontal direction is more often localized in the middle section and it is caused by compression. Small otlomok under the influence of temporal and to a lesser degree lateral muscles pterygium rotary motion in the joint moves upward inside and a few front. However, when expressed by a slant fracture cracks in the direction upwards and inwards (the turn of the outer compact disc is much lower than on the inside), the displacement of small fragments medially may not occur as a result of holding it on the big fragments (it rests against the inner compact disc of large fragments).
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