Peri-Implantitis and Implant Failure

Peri-implantitis is a condition of inflammation of tissues around the implant. If it is not treated, it will lead to implant failure.

The most important criterion for osseointegration of implant is primary stability. Micro movement of approximately 20 micron are known to prevent osseointegration of implant and may lead to fibrous union.

An implant is, by nature, insensitive to pain. If you find presence of mild pain or sensitivity, it indicates excessive loading or implant healing adjacent to a nerve. On the other hand, moderate or severe pain normally indicates peri-implantitis or nerve impingement. Pain in implant is an indication of implant failure and should be removed. A force of 500 grams in labio-lingual direction is used to check rigid fixation of an implant.

The normal movement of a successful implant should not be more than 75 micron. The implant mobility is assessed by an instrument known as “Periotest”. This means, a normal healthy implant will not show clinically detectable mobility. If an implant shows persistent clinical mobility more than 0.5 mm, it is an indication of implant failure.

Another sign of implant failure is gingival bleeding around implant. The most common bleeding index used to assess the bleeding is, “Low & Silness bleeding index”. The optimum pressure applied for implant probing, to check gingival bleeding, should be around 20 grams.

Since you have refreshed your knowledge on dental implants, you may like to take a two hour test on dental implant below. (you will have access to this paper for full one year including added new questions too.)

Take the Mock test by clicking HERE.

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