Why use a custom impression tray for prostheses?

When performing any kind of indirect rehabilitation, whether it’s mobile or based on implants, the impression tray is where you should begin. The first thing you need to do in order to choose the right impression tray is to figure out whether the procedure requires a standard or custom tray. The devices that are typically sold on the market are made of resin, solid metal, or perforated metal. These latter are disposable and do not permit a high degree of precision because of their lack of rigidity, which makes them difficult to work with. One area of dentistry where customization can be particularly useful is in the creation of custom impression trays </a>. Custom impression trays, made of resin and based on a patient’s mouth, produce a more accurate reproduction of the various surfaces found in the oral cavity. Another area of dentistry where various types of custom impressions can be particularly useful is in the restoration of damaged teeth. When trying to make a good impression, using a custom tray is absolutely necessary.

Custom impression trays for total prostheses

Complete dentures are another application that can greatly benefit from the use of custom impression trays. In this scenario, the tray has to be incredibly precise and crafted from an initial impression of alginate that is also extremely precise. The apparatus is made of photopolymerisable resin, and during the process of making the custom impressions, consideration was given to areas where it was important to avoid applying compression, including the following areas:

• The delicate tissues, which are susceptible to damage from the pressure of the trays,
• The regions of active muscle that have the potential to cause the prosthesis to become dislodged,
• The points at which the passage of nerves or blood vessels could potentially cause pain or pressure, as well as the points at which the future prosthesis could potentially cause damage

It is essential for there to be a close working relationship between the dental clinician and the dental technician when creating custom impression trays for prostheses . After obtaining the initial alginate impression, the dentist should mark the functional areas that are to be rejected or excluded when using the functional impression technique. When taking an impression of a patient using this method, the dentist should use thermoplastic pastes that are specifically designed to obtain a good marginal seal. This will help to increase the retention of the impression tray in the patient’s soft tissues.

It is possible to drill holes in the tray in order to improve the retention of the impression material within the tray. The size of the holes can vary depending on the material that is being used; for example, holes drilled in polysulfide will be smaller than holes drilled in alginate. The patient’s anatomy is taken into consideration when designing a custom tray, which leads to a more accurate impression, increased patient comfort, and decreased material waste. As a result of the dentist’s ability to personalize the impression tray based on the patient’s anatomy, the dentist is able to take a more accurate impression, which reduces the likelihood of material deformation and the compression of soft tissue. All of these factors contribute to the creation of a more accurate impression, which is necessary for the design of a prosthesis that takes into account the specific requirements and characteristics of each individual patient.