Sinus augmentation combined
with onlay/inlay grafted from chin - 1 |
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The procedure is used to harvest cortical bone for reconstruction of alveolar ridge prior to implant treatment.
Procedure performed in local anesthesia with proper preoperative sedation.
This tutorial is the first of two procedure tutorials describing a sinus augmentation combined with onlay/inlay grafted from the chin.
Click here to view the second part.
1.The chin graft.
Prior to procedure evaluate the thickness of cortical bone of the chin and the inclination of lower incisors (lateral radiograph) and measure the vertical height from apical area of lower incisors to the lower border of mandible (orthopantomogram corrected for magnification). Measure the amount of bone plate needed in the recipient area.
Semilunar formed incision well below mucogingival junction between the lower canines. Allow muscle to be attached at the superior edge for the incision.
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Muco/muscle/periostal flap raised all the way down to lower border of mandible. Inspect for anterior presence of mental nerve, when raising the flap. Avoid placement of retractors in this area.
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The amount of cortical bone plate needed is marked out with a ruler.
Horisontal osteotomi:
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Stay at least 5 mm below the apices of lower incisors and canines. |
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Leave at least 4 mm of bone at the lower border of chin |
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The cortical osteotomy is performed with diamond coated rotating disc with a cutting depth 3-4 mm. |
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The osteotomies are finished up with sharp curved chisels. The donor bone is stored in saline while recipient area is prepared.
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