Pennsylvania Dental Implant and Oral Surgery Associates, of Bucks and Montgomery Counties, Drs. Dachowski, Sock, and Daly are respected experienced leaders bone grafting, dental implant surgery and restoration of dental function and appearance.
Bone of poor quality and quantity, that may not be suitable for Dental Implants
Over time, the jawbone associated with missing teeth atrophies or is resorbed.
Today, with Drs. Dachowski, Sock, and Daly advance training and experience, we have the ability to grow bone where needed. This not only gives us the opportunity to place implants of proper length and width, it also gives us a chance to restore functionality and aesthetic appearance. Your surgeon will review all available options with you.
Bone grafting can repair implant sites with inadequate bone structure due to previous extractions, gum disease or injuries. The bone is either obtained from a tissue bank or your own bone is taken from the jaw, hip or tibia (below the knee). Sinus bone grafts are also performed to replace bone in the posterior upper jaw. In addition, special membranes may be utilized that dissolve under the gum and protect the bone graft and encourage bone regeneration. This is called guided bone regeneration or guided tissue regeneration.
Large defects of the jaw may require major bone grafting. At your consultation, Your surgeon will review your best options.
Sinus Lift Procedure
With age and tooth loss, the upper jawbone shrinks and the sinus enlarges. This often makes a patient a poor implant candidate. The maxillary sinuses are behind your cheeks and on top of the upper teeth. These are air-filled spaces that everyone has. Often the roots of the natural upper teeth extend up into the maxillary sinuses. When these upper teeth are removed, there is often just a thin wall of bone separating the maxillary sinus and the mouth. Dental implants need bone to hold them in place. Often the remaining bone is not enough to stabilize a dental implant.
There is a solution and it’s called a sinus graft or sinus lift graft. Your surgeon carefully enters the sinus from where the upper teeth used to be. The sinus membrane is then gently lifted upward and donor bone is inserted into the floor of the sinus. Keep in mind that the floor of the sinus is the roof of the upper jaw. After several months of healing, the bone becomes part of the patient’s jaw and dental implants can be inserted and stabilized in this new sinus bone.
The sinus graft makes it possible for many patients to have dental implants when years ago there was no other option other than wearing loose dentures.
If enough bone between the upper jaw ridge and the bottom of the sinus is available to stabilize the implant well, sinus augmentations and implant placement can sometimes be performed as a single procedure. If not enough bone is available, the sinus augmentation will have to be performed first, then the graft will have to mature for several months, depending upon the type of graft material used. Once the graft has matured, the implants can be placed.
In severe cases, the ridge has been resorbed and a bone graft is placed to increase ridge height and/or width. This is a technique used to restore the lost bone dimension when the jaw ridge gets too thin to place conventional implants. In this procedure, the bony ridge of the jaw is literally expanded by mechanical means. Bone graft material can be placed and matured for a few months before placing the implant.
Allogenic bone, or allograft, is dead bone harvested from a cadaver, then processed using a freeze-dry method to extract the water via a vacuum. Unlike autogenous bone, allogenic bone cannot produce new bone on its own. Rather, it serves as a framework or scaffold over which bone from the surrounding bony walls can grow to fill the defect or void.
Xenogenic bone is derived from non-living bone of another species, usually a cow. The bone is processed at very high temperatures to avoid the potential for immune rejection and contamination. Like allogenic grafts, xenogenic grafts serve as a framework for bone from the surrounding area to grow and fill the void.
Both allogenic and xenogenic bone grafting are advantageous in that they do not require a second procedure to harvest your own bone, as with autografts. However, because these options lack the transfer of living cells to form bone, bone regeneration is minimal, and may take longer than with autografts, with a less predictable outcome.
Each bone grafting option has its own risks and benefits. Drs. Dachowski, Sock, and Daly will determine which type of bone graft material is right for you.
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