title: Reproduction of intra-radicular surface anatomy of extracted human teeth: comparison of three different materials using injection technique.
abstract: This in vitro study compared the reproduction of intra-radicular surface anatomy of extracted human teeth taken by silicon, inlay casting wax and acrylic resin using an injection technique to determine which material produced fewer voids. Twenty impressions/patterns using this technique were made for each material and compared with each other on the basis of number, location and size of voids. Length of each dowel impression/ pattern was also compared. The percentage of void free surfaces using silicon, inlay casting wax and acrylic resin were 90%, 100% and 85% respectively. Most of the voids were less than 1mm in size and situated in the middle third of the impression/pattern. There was no significant difference in the length of the impression/ pattern taken by the three materials. Using the injection technique to reproduce the intra-radicular anatomy of the dowel space, all three materials will show predictably good results.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Bangabandhu Sheikh Mujib Medical University, Shahbag, Dhaka, Bangladesh. aliasamsu@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Sultana
authors.forename: M M
authors.initials: MM
authors.lastname: Rahman
authors.forename: M M
authors.initials: MM
authors.lastname: Rahman
authors.forename: P
authors.initials: P
authors.lastname: Shrestha
mesh_terms: D000180:Acrylic Resins; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D016009:Chi-Square Distribution; D003760:Dental Impression Materials; D003761:Dental Impression Technique / Q000295:instrumentation*; D006801:Humans; D007283:Inlay Casting Wax; D008422:Materials Testing; D015203:Reproducibility of Results; D012826:Silicone Elastomers; D013499:Surface Properties; D014081:Tooth Extraction
chemical_list: D000180:Acrylic Resins; D003760:Dental Impression Materials; D012826:Silicone Elastomers; D007283:Inlay Casting Wax