A Study On The Relationship Between Prominent Mandibular Angle And Truncation Bone Area's Size

Objective: Understood that the mandibular angle related osseous survey, seeks to under face structural feature influence close structure spot, and between them mutual influence relations. Truncation bone line choice and truncation bone size and various osseous side quantity data reciprocity.Methods: The correlation data value which gathering according to the Kamashi truncation bone line design method good prominent mandibular angle osteotomy truncation bone's 31 feminine patient, after photographs forehead CT, three dimensional reconstruction, surveys (head's length, head's width, face width, mandibular angle, mandible included angle, mandible width). Surveys the bone block value which with the straightedge the truncation eliminates, and calculates the corresponding area, uses the linear regression relevance to examine the enemy skull geometry shape structure and the truncation bone area carries on the correlational dependence analysis.Results: Before prominent mandibular angle osteotomy patient' s each surgery, metrical data for ((X|-)±S) 185.26±8.45mm, 144.85±7. 11mm, 133.95±7. 79mm, 107.19±5.410, 61.36±7.290, 103. 34±6. 65mm, prominent mandibular angle osteotomy truncation bone area for 592. 00±106. 31 mm~2. And, the feminine prominent mandibular angl osteotomy's truncation bone area and the mandibular angle, the mandible width and the mandible included angle have the relevance; The feminine mandibular angle osteotomy truncation bone area and the mandible included angle, the mandible width present are related, the the mandible width is wider, the corresponding truncation bone area is bigger, (r=0. 6608, p<0.01); The mandible included angle's number of degree is bigger, intercepts the bone area is also bigger (r=0. 605, p<0. 01) , The feminine truncation bone area and the mandibular angle assume the inverse correlation, reduces the truncation bone area along with the mandibular angle number of degree to increase correspondingly (r=-0. 862, P<0. 01); the head's length, the head's width, the face width and the truncation bone area not correlational dependence (p>0. 05) .Conclusion: In the prominent mandibular angle patient' s head length, head width and the face wide are not the truncation bone area primary factors, but the truncation bone area' s size mainly decided that in mandible' s shape, in the prominent mandibular angle osteotomy should consider this point fully.