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KMID : 0355619930190020207
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Journal of Korean Association of Oral and Maxillofacial Surgeons
1993 Volume.19 No. 2 p.207 ~ p.216
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Experimental study on the bone healing, after osteotomy in the mandibular angle of rabbits
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Abstract
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healing in osseous tissue different from soft tissue healing is the regeneration process which doesn't remain scar tissue. For primary bone healing, the ideal method is no gap and rigid fixation. But if the fragments could not fixed without gap,
tight
bone graft must be recommanded.
However, actually in clinic, small gaps during fixation could be occurred, then many surgeons were willing to fix the fragments commonly without bone graft in small gaps because they did not want to make other wound.
So, this experiment was performed to know the effect of various sized gap on the bone healing when the fragments were fixed with various sized gaps, and no bone rafts. After submandibular incision and angle exposure, the bony gaps of 0mm, 1mm,
3mm,
5mm,
and 7mm were made in each 4 rabbits, and the fragments were fixed rigidly. After 20 weeds, the rabbits were sacrificed and their mandibles wee extirpated. The observations and the measurements of the bony defects were performed, and the
microscopic
specimens were obtained.
@ES The results as follows
@EN 1. In group of no gap the wounds of bones were healed completely, and in group of 1mmm the wound were also healed satisfactorily. In these groups, the bony continuities were kept, the new bones in the cut areas were irregular and had high
cellularity.
2. In group of 3mm the sizes of remaining defects were similar as one of original defects.
3. In group of 5mm, 7mm the defects were partly larger than original defects since bony resorption.
Form this experiment, author concluded that during reduction and fixation the fragments must be adhere closely without gap. If impossible, the gaps must be minimized.
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KEYWORD
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