12/19/2023 0 Comments Lasting impression dental lab![]() ![]() Combining materials from different manufacturers or impression chemistries often leads to separating the two impression material layers, rendering the final impression useless. Companion wash materials are produced using the same chemistry as the base impression material and are specifically designed to work in tandem. Shorting one of the components or having air in the dispensing tube yields an impression with unpredictable results. Two-part impression materials rely on one of the components to catalyze the reaction. ![]() Correctly mixed impression material has a uniform color and consistency without any streaks or pockets of material that are not fully combined. Regardless of the type of material used, any impression material will not set completely if it is not mixed according to the manufacturer’s recommendations. If necessary, the molding compound may be heated and added to either type of tray to increase its depth. Plastic trays are easier to modify by using a flame to heat the plastic and adapting the flanges to accommodate the patient’s anatomy. Metal trays may be modified in the posterior regions, but modifications to the anterior portion of metal trays are difficult. The resulting impression should be of uniform thickness to prevent the tray from contacting the sides of the soft tissue and showing through the impression material itself.Ĭhoose a long enough tray to capture the entire arch and wide enough to allow for adequate tray seating. Poor Tray Selectionįor an accurate impression, the tray selected must be sufficiently large enough to capture all necessary information without distortion. If we understand how critical a good impression is, why do we still send subpar impressions to the dental lab and expect the technician to perform miracles? Let’s discuss some of the more common dental impression errors laboratory technicians see and what to do to avoid them. The longevity and usefulness of your final restoration is reliant on obtaining a high-quality impression that accurately reproduces an image of the patient’s anatomy. Dental impression errors, whether physical or digital, can ruin the lab’s ability to fabricate a quality, aesthetically-pleasing restoration. Many patients will flat-out tell you that they hate impressions because taking them feels very invasive, and patients often experience a loss of control.Īlthough digital impressions are one way to circumvent traditional impression methods, many of the same isolation and retraction techniques still apply. ![]() Even if you do everything correctly, you are at the mercy of the patient and their ability to cooperate with the procedure. Dentists hate them because they eat up valuable chair time. For as long as prosthetic dentistry has existed, dental impressions have been frustrating for everyone involved. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |