For many years, alginate impression material has been a staple of most dental practice and impression materials are an important consideration for dental clinics even today. Alginate is one of the most frequently used dental materials the alginate impression is usually performed at the first dental visit and its results are fundamental to forming a first “idea” about the patient’s oral health status. Irreversible hydrocolloid impressions are a common part of daily practice. However, this type of impression material, alginates (derived from marine algae), have the advantage of being among the most used in the dental medical field. Conventional impression materials are different, and especially with the advent of digital technology, they have been suffering from a decline in research attention over the last few years. Much progress has been made in the search for new marine derived materials. All the relevant studies were included in the search with respect to the characteristics and evolution of new marine derived materials. Authors conducted a search of articles in written in English published from 2008 to 2018. A comprehensive review of the current literature was conducted according to the PRISMA guidelines by accessing the NCBI PubMed database. The advantages of using alginate include the low cost, a better tolerability on the part of the patient, the ease of manipulation, the short time needed for execution, the instrumentation and the very simple execution technique and possibility of detecting a detailed impression (even in the presence of undercuts) in a single step. With the removal of the impression, being particularly rich in water, the imprints can deform but later adapt to the original shape due to the elastic properties they possess. They reproduce an imprint faithfully, providing details of a high definition despite the presence of undercuts. Elastic impression materials include reversible (agar-agar), irreversible (alginate) hydrocolloids and synthetic elastomers (polysulfides, polyethers, silicones). It is often caused by using too little impression and/or too much pressure applied when taking the impression.Hydrocolloids were the first elastic materials to be used in the dental field. This can cause occlusal issues in the final restoration. There is show-through of the impression tray.Again this can be caused by blood and saliva, poor retraction, and poor impression material. This can lead to a restoration that does not fit. This is one of the most common issues that dental labs experience with traditional impression methods. These can occur because of poor retraction techniques, the impression tray is removed before adequate time is achieved, or the impression material is not adequately mixed, etc. Tearing of the impression can also cause short or open margins.These can occur for a variety of reasons, including defective material, bubbles in the syringe, and blood/saliva in the area. Voids, especially those found on the margins, can cause restorations that are short and/or open.Distortions can be the result of impression trays that are too flexible, material detaching from the tray, going beyond the stated working time of the material, etc. These are difficult to catch and often are not found until a new impression is taken as a comparison. Distortions are a common issue found with dental impressions.Disinfect impression properly before sending to Burbank Dental Lab.Look carefully for any issues with the impression, such as voids or tears. Check the impression to make sure the margins were captured.Before removing the impression, follow the manufacturer’s instructions.Be careful not to exert pressure or move the tray in a way that could cause distortions. To avoid contact between teeth and tray bottom, apply controlled pressure while seating the tray. ![]() Load the tray parallel to the long axes of the prepared teeth and insert it slowly into the mouth. ![]()
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