Over a period of time, the jawbone associated with missing teeth atrophies or is reabsorbed. This often leaves a condition in which there is poor quality and quantity of bone suitable for placement of dental implants. In these situations, most patients are not candidates for placement of dental implants.
Today, 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 esthetic appearance.
Bone grafting can repair implant sites with inadequate bone structure due to previous extractions, gum disease, traumatic injuries, tumor surgery, or congenital defects. Often times large defects must first be repaired prior to placement of implants. The bone is either obtained from a tissue bank or your own bone is taken from the jaw. In addition, special membranes are 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.
*** I apologize for the watermark, but due to the tremendous amount of professional piracy I am forced to protect my work.
The maxillary sinuses are behind your cheeks and above of the upper teeth. Sinuses are like empty rooms that have nothing in them. Some of the roots of the natural upper teeth extend up into the maxillary sinuses. When these upper teeth are removed or lost, there is often just a thin wall of bone separating the maxillary sinus and the mouth. Dental implants require bone to hold them in place. When the sinus wall is very thin, it is impossible to place dental implants in this bone.
Sinus bone grafts are performed to replace the lost bone in the posterior upper jaw. Dr. Lupovici enters the sinus cavity via an intra-oral technique in the location where the upper teeth used to be. The sinus membrane is then 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.
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.
*** I apologize for the watermark, but due to the tremendous amount of professional piracy I am forced to protect my work.
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.
*** I apologize for the watermark, but due to the tremendous amount of professional piracy I am forced to protect my work.
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.
In severe cases, the ridge has been reabsorbed 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.
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