The all on four implants replace complete upper teeth with four titanium pins holding them. How can one insure they will not have a negative reaction to the titanium implants?
What is the Success Rate for "All on Four" Dental Implants?
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All-on-Four implant approach
First the answer to your question regarding reaction to implants: All implants are made of titanium which is very bone and tissue friendly and does not cause any reaction or rejection. Infection or inflammation is the only factor that can cause implants 'not take'.
As for All-on-Four implant approach, it's important to know that it is not for everyone and only selected patients may be appropriate for it. Also, it requires close collaboration between surgeon and the restorative dentist or prosthodontist to make it work. Also, the outcome and long term results are unknown as there is are not enough studies or long term evaluation in the literature yet. There are other approaches that are more predictable and perhaps even more successful in long term than All-on-Four technique.
The bottom line is it's risky, technique sensitive, and have potentially higher chances of failure than other more routine techniques.
All on Four is an excellent option for people who suffer with Dentures
The all-on-four technique is an excellent treatment option for someone who suffers with their loose or ill fitting dentures. It is also a great option for people who have been previously been turned away from dental implants due to insufficient bone height/width/volume. It gives patients hope and the chance to have a set of teeth which are NOT REMOVABLE. That in itself is priceless. Some patients can not afford to have 8-12 implants placed in each jaw to get a set of teeth. All-on-four gives these patients a chance.
The success rate is excellent when this procedure is properly executed and the patient is a good candidate for this treatment modality.
All-on-4 Implant supported prosthesis
Multiple techniques allow nowadays predictable results with immediate load of the prosthesis for edentulous patients. Depending upon the remaining amount of bone we can place 6-8 implants in cases with minimal bone loss where the prosthesis will have ony "white teeth" without pink porcelian or acrylic. But in patients with extensive bone loss, this type of treatment can become challenging. The most common areas that have limited amount of remaining bone is posterior maxilla and posterior mandible, and sometimes additional bone/soft tissue augmentation can be unpredictable.
Technique All-On-4 gives the chance to the patients with severe bone loss to get fixed prosthesis at the time of the implant surgery when other conventional techniques will fail. Not every patient should be a candidate for this type of treatment however it is becoming more popular due to it`s availability. The amount of bone loss is evaluated with CT scan (CBCT) to identify the areas where the implant will get good bone support and excellent prognosis. Usually the overall treatment plan involves multiple appointments: diagnostic impressions for immediate prosthesis, implant surgery with immediate placement of the prosthesis, fabrication of the final prosthesis. The surgical part is performed by oral surgeon and prosthetic part is done by a prosthodontist, specialists who are additionally trained to work with this particular method. The treatment is performed in sterile operating room setting under intra-venous sedation when patient is asleep. Not every implant dentist has an experience to perform this procedure.
This type of treatment helped many patients with extreme bone loss, trauma, after cancer rehabilitation, in cases with previously failed implants, in cases where none of the conventional methods can be used. This method is utilizing Nobel Biocare implants and has strong underlying research. All modern implants have the same type of titanium alloy which is a standard for every implant company. It has high biocomatibilty with biological tissue and none recorded case of allergy according to the research.
if you consider this type of tretament you should discover the options with ClearChoice centers which specialize with Al-On-4 treatment.
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Implants have high success rates.
All on four can work depending on your age and the density of your bone structure. A bone density test can reveal that and a panorex or CT scan. I would do more implants than 4 tho or at least get a second opionion from someone that does NOT do the all on four treatment.
Implant success is very predictable
All on four has shown some great success in cases where conventional wisdom would suggest that all-on-four was pushing the limits of our experience. While it is usually considered to have some very narrow applications and believed that it cannot be used for EVERY case, this approach is becoming more common. For the cases that are appropriate, success is good. Depending on type of final restoration, quality of bone, bite forces and other factors, "all on four" may work for you.
As far as insuring no adverse reaction, nothing is 100%. Titanium is not recognized by the body as foreign, so there is no rejection of the material. However, if infection is present at the time of placement or during the healing phase, then success rates go down.
If all on four is not appropriate, more implants and additional augmentive surgeries will increase chances for success.
The titanium aspect of implants is very predicatable.
However, the "all on 4" concept has very poor predictability. The biology of the bone, the extend of the prosthesis are only 2 of the crucial players in this restoration. Most cases have been tried in university settings only, the ones in private practice have had little overall long term success. They do work in carefully treatment planned cases, with very qualified specialists.
Anca Bazile, DDS, MSD, New York City
These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.