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| Planning for Implants |
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Implant treatment is generally very straightforward. Careful planning before we start will make sure that treatment proceeds smoothly and predictably.
Where one or just a few teeth are to be replaced in an otherwise intact dentition planning is usually straightforward. However in circumstances where there is little bone available, or few teeth remain to guide the surgeon in his choice of implant positions, planning may need to be rather more elaborate.
In these situations, we would often ask our patients to have a CT scan. These scans are special radiographic (x-ray) procedures, which allow us to create a three-dimensional millimetre accurate computer simulation of the jaws. This extraordinary technology means that we can examine the intended implant site in any plane and get an absolutely clear understanding of the anatomy of the region and pre-select the precise types of implant which will be used.
Indeed it is even possible to use Rapid Prototyping technology to convert the computer image to a “real” three dimensional plastic replica of the jaw. Having such a model of the jaw in front of us when we plan surgery makes treatment extremely straightforward and enables us to pre-fabricate guides for drilling and even temporary bridgework.
CT scanners are X-ray machines and so there is exposure to X-rays during the scanning process. Of course every attempt is made to keep the exposure to the absolute minimum, and we only send our patients to centres having the latest and best equipment with the lowest possible exposures.
The results of the scans are generally available one – two weeks after the investigation, at which time we are available to discuss the results.
To complete the planning process we may also need to make temporary bridgework or Prototype Bridge or denture work, which will allow you to get an idea of how the final implant restoration will actually look or feel.
Sometimes, to maximise the benefit of the CT investigation we may use these sorts of prototype prostheses to make “Radiographic Stents”. These take the form of plates, which mimic the anticipated tooth position. Because the stent also shows up on the CT scan we can more precisely plan the position that each implant should be in order to support the final prosthetic teeth.
If a Radiographic Stent is made, this should be taken with you to the Scan Centre and worn as instructed during the procedure. |
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