www.ijcmr.com International Journal of Contemporary Medical Research ISSN (Online): 2393-915X; (Print): 2454-7379 | ICV (2015): 77.83 | Volume 3 | Issue 11 | November 2016 3361 To Fabricate and Compare the Accuracy of Edentulous Primary Impression with Maxillary Adjustable Stock Metal Tray to Conventional Maxillary Stock Metal Tray Shreeprasad Wagle 1 , Sulekha Gosavi 2 , Siddharth Gosavi 3 , Komal Nalawade 1 , Rozina Vishnani 1 ORIGINAL RESEARCH ABSTRACT Introduction: Stock metal trays are available in various sizes depending upon patient’s jaw size, selection and keeping these trays is costly and time consuming to the operator. Objectives of the study were to fabricate an adjustable maxillary edentulous stock metal tray for maxillary arch impression and to compare the accuracy of an adjustable maxillary stock tray with that of conventional maxillary stock tray. Material and Methods: an in-vitro comparative study was undertaken to access the accuracy of new adjustable tray with the conventional stock tray in school of dental sciences, KIMS, Karad. New adjustable maxillary stock tray was fabricated by using two big and two small stainless steel halves and adjustable screws to adjust width and length according to patient’s arch. Ten impressions of ideal maxillary cast were recorded with impression compound by using conventional stock tray [group CST] and ten impressions by using an adjustable stock tray [group AST] and the results were analyzed by using unpaired t test. Results Mean values measurements (in mm) of group CST reference points AB, CD, AC, BD and AD were 31, 48.9, 33.8, 31.7 and 49.6 respectively. Mean value measurements (in mm) of group AST reference points AB, CD, AC, BD and AD were 30.65, 48.9, 33.95, 31.9 and 49.25 respectively. There was apparent difference between conventional and an adjustable tray. Conclusion There was statistical difference between impressions with conventional and adjustable stock tray. Adjustable maxillary stock tray can be used as a stock tray for primary impression in maxillary edentulous patient. Keywords: Stock impression tray, adjustable impression tray, primary impression, edentulous impression, impression compound. INTRODUCTION Prosthodontists always desire to make accurate impression for successful prosthesis. To achieve accurate impressions dentists need to access the tissue to be recorded, selection of accurate stock tray and impression material are important. 1,2 Tray is a device used to carry the impression material to the mouth, confne the material in opposition to the surface to be recorded, and control the impression material while it sets to form the impression. Accurate impression is depending upon accurate tray and good impression material. Many types of stock trays size 0 to 4numbers are available for making primary impression. According to the size of patient’ arch or jaw, particular size of tray is selected. Hence dentists need to have different size of trays, but sometimes stock trays are poorly shaped and are not according to size of jaw. 3,4 This may leads to improper impression recording of patient’s jaw. Some patient may require modifcation of the tray which increases chair side time. Stock trays that are available in market are perforated, non-perforated and plastics trays. Plastic tray is not rigid and may distort during impression procedure. 5 Selection of tray depends upon the impression material and operator’s choice. Since 50 years there in not much change in design of tray but different impressions materials has evolved. 6 Metal stock trays are available in number 0 to 4 sizes according to the need of patient’s jaw. All tray manufacturers fail to reduce the total number of trays. Multiple insertion of stock tray for selection in patient mouth is annoying and increase chair side time. So we felt the need of fabrication of an adjustable metal stock tray which will help dentist to adjust it according to the patient’s arch size. Hypothesis was that newly fabricated adjustable stock tray may not record primary impression as accuracy as impression with conventional stock tray. Hence, the aim of this original study was to fabricate an adjustable maxillary stock tray for impression of maxillary edentulous arch. This study was also access the accuracy of an adjustable maxillary stock with the conventional maxillary stock tray. Objectives of the study were to fabricate an adjustable maxillary edentulous stock metal tray for maxillary arch impression and to compare the accuracy of an adjustable maxillary stock tray with that of conventional maxillary stock tray. MATERIAL AND METHODS It was an in-vitro comparative study conducted in school of dental science, KIMSDU Karad. The study was conducted by trained dental student under the supervision of expert dental surgeon in fully equipped dental school. After getting ethical clearance certifcate from the Krishna institute of medical science deemed university Karad, study was conducted in the department of Prosthodontics of above mentioned university. To start with, fabrication of adjustable tray and to check its accuracy following materials were required. Materials used for fabrication of an adjustable maxillary stock tray- 1. Stainless steel plates 2. Screw and threaded nuts 1 Intern, School of Dental Sciences, 2 Professor, 3 Reader, Department of Prosthodontics, Crown and Bridge, Karad, Maharashtra, India Corresponding author: Ms. Shreeprasad Wagle, Anand Nagar, Lashkarwadi, At post: Jalgaon, Tal: Dapoli, Dist: Ratnagiri, pin code: 415712, Maharashtra, India How to cite this article: Shreeprasad Wagle, Sulekha Gosavi, Siddharth Gosavi, Komal Nalawade, Rozina Vishnani. To fabricate and compare the accuracy of edentulous primary impression with maxillary adjustable stock metal tray to conventional maxillary stock metal tray. International Journal of Contemporary Medical Research 2016;3(11):3361-3364.