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| If teeth are missing from the Posterior Maxilla (jaw) there is no stimulation to keep the bone from experiencing astrophy. The area astrophies because there is a slightly higher pressure in the sinus and the sinus enlarges with time. |
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The ‘sinus lift’ procedure involves: a) Lifting the gum b) Making an opening in the bone c) Lifting the membrane that lines the Sinus and raising it to the desired level. usually it is raised to the original size or slightly greater. |
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| The sinus is then filled with a bone substitute. this can be synthetic bone, freeze dried demineralized human bone or bone from animals such as the cow (bovine bone). The patients own bone can also be used from another location. |
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This bone acts like a matrix and encourages bone to grow in between the spaces. It is also reabsorbed and replaced with the patients own bone. With certain bovine bone substitutes as much as 70% of the bone is replaced in 7-9 months. |
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| The bone area becomes more and more like the original with time. With time the bone will become 100% the patients own bone unless we used a non reabsorbable material. |
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When the bone is sufficiently matured, usually 7-9 months with bovine bone and 4-6 months for patients own bone (autograft) the implant fixture can then be placed. |
