title: Evaluation of the occlusal contact of crowns fabricated with the bite impression method.
abstract: In prosthodontic treatment, reconstruction of a proper occlusal contact relationship is very important as well as reconstruction of a proper interproximal relationship and marginal fitness. Unfortunately, occlusal relationships are sometimes lost in the process of occlusal adjustment of crowns. The purpose of this study was to compare the occlusal contacts of single crown fabricated by two different types of impression techniques. Nine subjects, whose molars required treatment with crown restoration, were enrolled in this study. Full cast crowns were fabricated using two types of impression techniques: the conventional impression method (CIM) and the bite impression method (BIM). The occlusal contacts of crowns were precisely evaluated at the following stages: after occlusal adjustment on the articulator (Step 0), before occlusal adjustment in the mouth (Step 1), after occlusal adjustment at the intercuspal position (Step 2), and after occlusal adjustment during lateral and protrusive excursions (Step 3). The number of occlusal contacts of the crowns on the functional cusps fabricated with BIM was significantly greater than that with CIM after occlusal adjustment. For this reason, the crowns fabricated with BIM might have a more functionally desirable occlusal surface compared to the crowns fabricated with CIM.
authors.affiliation: Fixed Prosthodontics, Department of Restorative Science, Graduate School, Tokyo Medical and Dental University.
authors.forename: Sachi
authors.initials: S
authors.lastname: Makino
authors.forename: Daizo
authors.initials: D
authors.lastname: Okada
authors.forename: Chiharu
authors.initials: C
authors.lastname: Shin
authors.forename: Reiko
authors.initials: R
authors.lastname: Ogura
authors.forename: Masaomi
authors.initials: M
authors.lastname: Ikeda
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Miura
mesh_terms: D000464:Alginates / Q000737:chemistry; D002133:Calcium Sulfate / Q000737:chemistry; D003102:Colloids / Q000737:chemistry; D003442:Crowns; D000044:Dental Abutments; D003725:Dental Articulators; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique / Q000295:instrumentation; D003766:Dental Occlusion; D017267:Dental Prosthesis Design; D005260:Female; D006801:Humans; D007574:Jaw Relation Record / Q000379:methods; D008297:Male; D008875:Middle Aged; D003765:Models, Dental; D008963:Molar; D019558:Occlusal Adjustment; D011145:Polyvinyls / Q000737:chemistry; D011176:Post and Core Technique; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties; D019231:Tooth Preparation, Prosthodontic / Q000379:methods; D019553:Tooth, Nonvital / Q000628:therapy
chemical_list: D000464:Alginates; D003102:Colloids; D003760:Dental Impression Materials; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; D002133:Calcium Sulfate