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Bone Grafting

Periodontal disease is the leading cause of bone loss in the oral cavity, though there are others such as ill-fitting dentures and facial trauma.  The bone grafting procedure is an excellent way to replace lost bone tissue and encourage natural bone growth.  Bone grafting is a versatile and predictable procedure which fulfills a wide variety of functions.

A bone graft may be required to create a stable base for dental implant placement, to halt the progression of gum disease, or to make the smile appear more aesthetically pleasing.

There are several types of dental bone grafts.  The following are the most common:

  • Autogenous bone graft – In this type of graft the bone is removed from elsewhere in the body and implanted in the mouth.  Common donor sites for bone grafting include the iliac section of the pelvis, the chin and the posterior third molar areas of the jaw.  If large amounts of bone need to be harvested, the hip or the shin bone (tibia) is generally used.

  • Allograft – Synthetic bone (manmade) can be created in the laboratory and used in the bone grafting procedure.  Bone can also be obtained from a bone bank (cadaver bone).

  • Xenograft – This is the implantation of bovine (cow) bone. A xenograft is perfectly safe and has been used successfully; ample bone can be obtained, and a secondary donor site is not necessary.

Reasons for bone grafting

There are a wide variety of reasons why bone grafting may be the best option for restoring the jaw bone.

Dental implants – Implants are the preferred replacement method for missing teeth because they restore full functionality to the mouth; however, implants need to be firmly anchored to the jawbone to be effective.  If the jawbone lacks the necessary quality or quantity of bone, bone grafting can strengthen and thicken the implant site.

Sinus lift – A sinus lift entails elevating the sinus membrane and grafting bone onto the sinus floor so that implants can be securely placed.

Ridge augmentation – Ridges in the bone can occur due to trauma, injury, birth defects, or severe periodontal disease.  The bone graft is used to fill in the ridge and make the jawbone a uniform shape.

Nerve repositioning - If the inferior alveolar nerve requires movement to allow for the placement of implants, a bone grafting procedure may be required.  The inferior alveolar nerve allows feeling and sensation in the lower chin and lip.

What does bone grafting treatment involve?

Bone grafting is a fairly simple procedure that can be performed under local anesthetic; however, if large amounts of bone area need to be grafted, general anesthetic may be required.

Initially, the grafting material needs to either be harvested or prepared for insertion.  A small incision is made in the gum tissue and then gently separated from the bone.  The bone grafting material is then placed at the affected site.

The bone regeneration process may be aided by:

  • Gum/bone tissue regeneration – A thin barrier (membrane) is placed below the gum line over the grafting material.  This barrier creates enough space for healthy tissue to grow and separates the faster growing gum tissue from the slower growing fibers.  This means that bone cells can migrate to the protected area and grow naturally.

  • Tissue stimulating proteins – Enamel matrix proteins occur during natural tooth development.  Emdogain is a matrix protein product which is usually placed on the affected site before the gum is sutured.  It mediates the formation of accellular cementum on the tooth which provides a foundation to allow periodontal attachment to occur.  Tissue stimulating proteins help create lost support in areas affected by periodontal defects.
  • Platelet-rich growth factors – A high platelet concentration liquid can be used to create a blood clot at the site of a wound.  It has recently been discovered that PRGF also stimulates bone growth – meaning a denser graft in a shorter time period.

The gum is sutured in place and a follow-up appointment will need to be made within 10 days to assess progress.  Bone grafting is a highly successful treatment and a good base for further periodontal restorations.

If you have any questions about bone grafting, please ask your dentist.

Testimonials.

Read what people are saying about us.

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Testimonials

I am 42 years old. All of my life I was self conscious about my smile
because of the dark tetracycline stain on my teeth. When I was 37 I
decided to do something about it. I had braces for four years to prepare
me for orthognathic surgery. My maxillofacial surgeon moved my jaw
forward so my overbite would be corrected. After that healed, the braces
came off and I went to see Dr. Stewart. She said I was a perfect
candidate for porcelain veneers. After talking with her and seeing her
portfolio, she installed them.

Almost over night I went from not smiling at all to grinning like a
fool. I can tell you the exact moment I knew I had made the right
decision to do what I had done. About a month after Dr. Stewart had
finished with me, a complete stranger said, "You have a nice smile." It
was the first time in my life I had ever heard those words...ever. My
limited vocabulary prevents me from describing what those words meant to
me but my whole world was changed.

I am 42 years old and I have a nice smile. Would I do it all again?
Absolutely! Do I have any regrets? Absolutely not!

Thanks Dr. Stewart!


Stephen...with a PH!

"Whenever people complain about their dentist or say they haven't been for a checkup in years, I tell them about Dr. Nancy Stewart and her great team. They're all friendly and professional, and the work they do is top-notch. For the past nine years, they have done both 'yearly maintenance' and cosmetic procedures on my teeth, and I get regular compliments on my smile! Leave your excuses at home and go see Dr. Nancy."

Kate Y. February 2007

"Dr. Stewart may be the only dentist I have never been afraid to go to.
Everyone on her staff is informative, friendly and professional, and so is
she. Check out the photo board on your way out, too - she's the only dentist
I've ever met who gets flossing photos from her patients' vacations!"

J. Handler

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