Monday, October 16, 2017
lines
 Search  
For Patients

Bone Grafts



Introduction

A basic part of any spinal fusion is the bone graft. Bone grafting is used for many types of orthopedic procedures that require bones to heal. Bone grafting is used in two main ways during spine procedures:

    • 1) to stimulate the bone to heal

  • 2) to provide support to the skeleton by filling gaps between two bones

Stimulate Healing

The most common use of bone graft is to stimulate the healing of bone. The bone graft is used like "fertilizer" to stimulate and speed the bone healing process. Bone tissue that is crushed into powder and placed around a fracture or a fusion site has chemicals in it that stimulate the nearby bones to heal. If the bone is taken from the person's own body, there may also be osteocytes (living bone cells) that survive being transferred to the new location and continue to do their work of making new bone. Even bone taken from someone else will stimulate bone to heal. But bone taken from the same person may be better because the chances are higher that it will have remaining live bone cells after the transfer.

Provide Support

Bone graft is also used for structure. Rather than crush the bone into fine pieces, larger pieces of bone are used to fill a gap between two bones. For example, if the surgeon removes a vertebra or disc, he may place a chunk of bone graft into the space. Because bone is rigid, it will hold the bones apart while the body grows to the ends of the graft. Over time the entire piece of bone that was grafted will be "remodeled" and replaced by the body with new bone. The time it takes to fuse depends on the size of the piece of bone that was used. It is sometimes a slow process that may take several years.

Autograft vs. Allograft

Your surgeon will try to promote and speed the healing of your spinal fusion in a number of ways. The most common approach is to use your own bone whenever possible. Bone taken from your own body is called autograft. Bone graft taken from someone else is called allograft. The surgeon may mix allograft with autograft.

Allograft can come from many types of bones in many different forms. Allograft is usually removed from organ donors and placed in bone banks. Bone banks make sure the bone graft is sterile by testing it for diseases such as hepatitis and AIDS-just like testing done in a blood bank. Because it is not taken from the patient, it does not contain any living cells, and therefore has fewer chemicals to stimulate growth of new bone. The disadvantage of an allograft is that it may not always grow as well or as quickly as an autograft, but a bone-growing protein can be added to the area to make up for what the bone graft lacks. The advantage to using allograft is that the patient does not have to donate the bone graft. This makes the surgery shorter, and there may be less pain afterward. The allograft carries a very small risk of transferring infectious diseases even though it is rigidly tested.

Allograft is very useful when the operation requires more bone graft than your own body can supply. Some major spine fusions need a lot of bone graft. Some surgeries need large pieces of structural bone graft, which may cause problems in the area of the body where the bone was removed.

New Technology

Much research is in progress to design bone graft substitutes, chemicals, and devices that stimulate the bones to fuse. It is well known that electrical current stimulates bone to grow. Many surgeons use electrical stimulation devices during the first weeks of surgery to speed up a fusion. Some artificial bone graft materials have been developed. For instance, sea coral, harvested from oceans, is sometimes used very successfully as the basis for a structural bone replacement. Other developments include

  • Demineralized bone matrix (DBM) - A type of allograft developed from cadaver bones in a bone bank. The bone has the calcium removed and can be turned into a putty, sheet, or gel. The material can then be added to a graft site to improve the fusion.

  • Autologous growth factor (AGF) - A solution used to stimulate bone growth. It is developed in a laboratory from blood platelets (the clotting part of blood). The mixture is usually used in combination with some form of structural support, such as autograft or fusion cages.

  • Bone morphogenic protein (BMP) - A chemical added to bone graft to enhance bone growth when added to a fusion site.

Surgery for Spinal Disorders - Lumbar

Surgery for Spinal Disorders

Copyright 2013-2017 by Henry E. Aryan, MD, FAANS   Terms Of Use  Privacy Statement

DotNetNuke® is copyright 2002-2017 by Perpetual Motion Interactive Systems Inc.


There's nothing We discover much more thourilling compared to a fresh group of replica watches sale that'll be constructed away to incorporate a variety of versions thourough the years. replica watches sale had been final capable to do this along with brand new design households like the Ballon Bleu and also the cartier replica sale. Taking a look at the actual Cartier Cle de Cartier case very carefully, you are able to appreciate the actual style as well as elegance rolex replica sale desired to ensure this evoked. Cartier had been definitely prosperous within creating a style which includes a number of really fascinating outlines rolex replica looked over carefully, in addition to a form that's appealing whenever seen thourough very far. There's a particular "hublot replica sale" towards the Cartier Cle de Cartier which originates from the actual tonneau-style case which has heavy rolex replica sale that downward slope lower and be the actual lugs. This particular produces the actual feeling how the rolex replica uk is actually slightly little bit bigger than it's, as well as from 40mm broad within it's biggest type, I believe this creates the good looking mens design. I can not overstate exactly how comfy the actual Cle is actually about the arm.