title: Impression matrix technique for cusp replacement using direct composite resin.
abstract: Placement of Class II composite resin restorations often presents unique challenges in achieving proper contour and contact. Although the use of sectional bands has provided solutions to these problems, their use typically is limited to more ideal cavity preparations. With more extensive loss of tooth structure, recreating the natural tooth contours and contacts with direct resin composite can be difficult. Typically an indirect restoration is the treatment of choice when a cusp is lost. However, situations may arise that require the use of direct resins for cusp replacement. This article describes the use of an impression matrix to facilitate the replacement of missing tooth structure and allow the dentist to use sectional bands in certain cusp loss situations.
  
  
  CONCLUSIONS
  When applicable, the impression matrix provides a significant saving in time and effort in cusp replacement with direct composite resins.
authors.affiliation: Department of Operative Dentistry, The University of Iowa College of Dentistry, Iowa City, IA, USA. denehy@uiowa.edu
authors.forename: Gerald
authors.initials: G
authors.lastname: Denehy
authors.forename: Deborah
authors.initials: D
authors.lastname: Cobb
mesh_terms: D001641:Bicuspid; D003188:Composite Resins; D003737:Dental Cavity Preparation / Q000009:adverse effects; D003761:Dental Impression Technique; D003793:Dental Restoration, Permanent / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006801:Humans; D008434:Matrix Bands; D008875:Middle Aged; D019228:Tooth Crown / Q000293:injuries; D014082:Tooth Fractures / Q000209:etiology
chemical_list: D003188:Composite Resins; C451741:point 4 composite resin