The Impression Trays Perforated Set of 10Pcs. orthodontic is a set of trays used to take dental impressions of patients undergoing orthodontic treatment. The perforated trays are designed to better retain the impression material, resulting in more accurate and detailed impressions. The set usually includes trays of different sizes to accommodate the dental anatomy of various patients, from children to adults. These trays are essential for treatment planning, fabrication of study models, and construction of orthodontic appliances.