title: Assessment of Posterior Teeth Preparations for Metal-Ceramic Crowns.
abstract: OBJECTIVE
  To evaluate teeth preparation designs for metal-ceramic crowns in private dental practice in Jordan.
  
  
  METHODS
  One-hundred and seventy two dies were included. Different aspects of tooth preparations were quantified, analyzed and compared with the recommended guidelines.
  
  
  RESULTS
  Almost 64% of preparations finish lines were positioned subgingivally. Shoulder finish lines were observed in 74.4% where-as 22.7% showed chamfer finish lines. Total occlusal convergence angles were 29.8 degrees in BL plane, 247 degrees in MD plane.
  
  
  CONCLUSIONS
  Dental practitioners in private practice in Jordan did not fully adhere to the recommendedguidelines for tooth preparations for MCRs.
authors.forename: Ziad N
authors.initials: ZN
authors.lastname: Al-Dwairi
authors.forename: Mahmoud Mamdouh
authors.initials: MM
authors.lastname: Bashatwa
authors.forename: Edward
authors.initials: E
authors.lastname: Lynch
mesh_terms: D001641:Bicuspid / Q000033:anatomy & histology; D003442:Crowns; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design / Q000592:standards; D005792:General Practice, Dental; D005881:Gingiva / Q000033:anatomy & histology; D019983:Guideline Adherence; D006801:Humans; D016876:Metal Ceramic Alloys / Q000737:chemistry; D003765:Models, Dental; D008963:Molar / Q000033:anatomy & histology; D017410:Practice Guidelines as Topic; D011476:Prosthodontics; D013499:Surface Properties; D019231:Tooth Preparation, Prosthodontic / Q000592:standards*
chemical_list: D016876:Metal Ceramic Alloys; D003776:Dental Porcelain