Dental implants, bone grafting

Preparing operations before dental implantation

•     Sinus lifting
•     Bone grafting

Bone grafting is often closely associated with dental restorations such as bridge work and dental implants. In the majority of cases, the success of a restoration procedure can hinge on the height, depth, and width of the jawbone at the implant site. When the jawbone has receded or sustained significant damage, the implant(s) cannot be supported on this unstable foundation and bone grafting is usually recommended for the ensuing restoration.

There are several major factors that affect jaw bone volume:

Periodontal Disease – Periodontal disease can affect and permanently damage the jaw bone that supports the teeth. Affected areas progressively worsen until the teeth become unstable.

Tooth Extraction – Studies have shown that patients who have experienced a tooth extraction subsequently lose 40-60% of the bone surrounding the extraction site during the following three years. Loss of bone results in what is called a “bone defect”.

Injuries and Infections – Dental injuries and other physical injuries resulting from a blow to the jaw can cause the bone to recede. Infections can also cause the jaw bone to recede in a similar way.

Reasons for bone grafts

Bone grafting is a highly successful procedure in most cases. It is also a preferable alternative to having missing teeth, diseased teeth, or tooth deformities. Bone grafting can increase the height or width of the jawbone and fill in voids and defects in the bone.

There are essentially two basic ways in which bone grafting can positively impact the health and stability of the teeth:

Jaw Stabilization – Bone grafting stabilizes and helps restore the jaw foundation for restorative or implant surgery. Deformities can also be corrected and the restructuring of the bone can provide added support.

Preservation – Bone grafting can be used to limit or prevent bone recession following a tooth extraction, periodontal disease, or other invasive processes.

Oral Examination

Initially, the dentist will thoroughly examine the affected area in order to assess the general condition of the teeth and gums. If periodontal disease is present or the adjacent teeth are in poor condition, these factors will be fully addressed before the bone grafting procedure can begin. The dentist will also recommend panoramic x-rays in order to assess the precise depth and width of the existing bone. On occasion, a CAT scan may be recommended to determine the bone condition. Depending on these results, the dentist may also anesthetize the area and explore the gum in order to determine what kind and how much bone is required.

What Does Bone Grafting Involve?

There are several types of bone grafts. Your dentist will determine the best type for your particular condition.

• Autogenous Bone Graft – Extracted from the patient’s own body (usually from the posterior part of the lower jaw or the chin).
• Allograft Bone Graft – Cadaver or synthetic bone is used in this type of graft.
• Xenograft – Cow bone is used in this type of graft.

The bone grafting procedure can often take several months to complete.

During the surgery, the dentist will numb the grafting and extraction sites using local anesthetic. A small incision will be made to prepare the site for the new bone and it will be anchored into place. On occasion, a synthetic membrane may be used to cover the new bone. This membrane prevents soft tissue and bacterial invasions, and encourages new bone growth. The surgery does not require an overnight stay, and you will be provided with comprehensive instructions for your post-operative care. The dentist will prescribe medications to help manage infection, discomfort and swelling.

Dental Implants

Dental implants are a great way to replace missing teeth and also provide a fixed solution to having removable partial or complete dentures. Implants provide excellent support and stability for these dental appliances.

Dental implants are artificial roots and abutments (usually titanium) that are surgically placed into the upper or lower jaw bone by a dentist. The teeth attached to implants are very natural looking and often enhance or restore a patient’s smile.

Dental implants are very strong, stable, and durable and will last many years, but on occasion, they will have to be re-tightened or replaced due to normal wear.

Reasons for dental implants:

• Replace one or more missing teeth without affecting adjacent teeth.
• Resolve joint pain or bite problems caused by teeth shifting into missing tooth space.
• Restore a patient’s confident smile.
• Restore chewing, speech, and digestion.
• Support a bridge or denture, making them more secure and comfortable.

What does getting dental implants involve?

The process of getting implants requires a number of visits over several months.

X-rays and impressions (molds) are taken of the jaw and teeth to determine bone, gum tissue, and spacing available for an implant. While the area is numb, the implant will be surgically placed into the bone and allowed to heal and integrate itself into the bone for up to six months.

After several months of healing the artificial teeth are made and fitted to the post portion. Because several fittings may be required, this step may take two or more visits. After a healing period, the artificial teeth are securely attached to the implant, providing excellent stability and comfort to the patient.

You will receive care instructions when your treatment is completed. Good oral hygiene, eating habits, and regular dental visits will aid in the life of your new implant.