PDF - What causes a fixed prosthesis to fail? Intraoral examination - Class 3

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When we are going to perform the intraoral examination, we must evaluate the muscles, teeth, tissues, soft tissues and occlusal relationships. Before that, we will examine the patient's mucosa in search of lesions. If you find any lesions, you should not treat the fixed prosthesis before performing the patient's rehabilitation treatment.

Here, you will also look for some type of tongue with teeth clenching on the side of the tongue; the patient may have nocturnal clenching. Here, we must be careful with bruxism.

Now, you need to go to the examination of the patient's teeth and periodontium. The teeth that you want to evaluate at this time will be caries lesions and extensive restorations. However, cavities are the main factor that will cause a partial denture to fail.

The patient's carious lesion will classify him/her according to his/her risk of cavities. Here, you don't just want the abutment tooth, but rather define the patient's risk of cavities. If the patient has many carious lesions, you must condition the patient's entire mouth, because a patient with a high risk of cavities may have prosthetic treatment failure. He/she will need to reeducate oral hygiene, and this will lead to the failure of the patient's fixed prosthesis.

As a professional, you need to reeducate the patient to the point of showing him/her the risks he/she runs when he/she has a fixed prosthesis cemented to his/her teeth. However, carious lesions are related to the cementation line, marginal adaptation and hygiene habits. And if the prosthesis item is cemented, there will be a lack of adaptation of this prosthesis, and this can generate a carious lesion and lead to the failure of the fixed partial denture.