Mandibular Deficiency Medical Assignment Help

Mandibular Deficiency

The most obvious clinical feature of mandibular deficiency is the retruded position of the chin as viewed. from the profile aspect. Other facial features often associated with mandibular deficiency may include an excess labiomental fold with a procumbent appearance of the lower lip, abnormal posture of the upper lip, and poor throat form. Intraorally, mandibular deficiency is associated with class· II molar and cuspid relationships and an increased overjet in the incisor area.

FIG. 25-16 Mandibular advancement techniques. A, Mandibular advancement using vertical osteotomy and iliac crest bone grafts in osteotomy defect. 8, Modified C osteotomy with sagittal splitting of inferior border of mandible combined with iliac crest bone grafts

FIG. 25-16 Mandibular advancement techniques. A, Mandibular
advancement using vertical osteotomy and iliac crest bone grafts in
osteotomy defect. 8, Modified C osteotomy with sagittal splitting of
inferior border of mandible combined with iliac crest bone grafts

FIG 25-7

FIG 25-7

FIG 25-17

FIG 25-17

FIG. 25-18 Total subapical-osteotomy. Dentoalveolar segment of mandible is moved anteriorly, allowing correction of class 1/ malocclusion without increasing chin prominence.

FIG. 25-18 Total subapical-osteotomy. Dentoalveolar segment of
mandible is moved anteriorly, allowing correction of class 1/ malocclusion
without increasing chin prominence.

portion of mandible is osteotomized, moved forward, and stabilized (Fig. 25-19, A, C, and D). In addition to anterior or posterior repositioning of the chin, vertical reduction or augmentation and correction of asymmetries
can also be accomplished with inferior border osteotomies. Alloplastic materials can occasionally be used to augment chin projection; the material is onlayed in areas of bone deficiencies (Fig. 25-19, B).

 

 

 

 

 

 

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