title: Stereophotogrammetric analysis of abutment tooth movement in distal-extension removable partial dentures with intracoronal attachments and clasps.
abstract: This study applied the three-dimensional measurement technique of stereophotogrammetry to measure abutment tooth movement under occlusal loading as a function of intracoronal attachment and clasp design. Six distal-extension removable partial denture designs were studied: (1) RPI-mesial occlusal rest, proximal plate, buccal I-bar; (2) cast circumferential clasp; (3) P.D. locking semiprecision attachment; (4) Thompson dowel nonlocking semiprecision attachment; (5) McCollum precision attachment; and (6) Stern G/L precision attachment. The movement in microns was determined by computer analysis. The Thompson dowel semiprecision attachment generated the most abutment movement in a gingival direction. The clasp-retained designs generally had less total movement than the attachment designs. Clasps and attachments for the abutment teeth adjacent to the distal-extension bases generally moved more than the abutment teeth.
authors.affiliation: University of Missouri-Kansas City, School of Dentistry.
authors.forename: T M
authors.initials: TM
authors.lastname: Chou
authors.forename: J D
authors.initials: JD
authors.lastname: Eick
authors.forename: D J
authors.initials: DJ
authors.lastname: Moore
authors.forename: D E
authors.initials: DE
authors.lastname: Tira
mesh_terms: D000704:Analysis of Variance; D002858:Chromium Alloys; D003442:Crowns; D000044:Dental Abutments; D003799:Dental Stress Analysis; D003779:Denture Design; D003834:Denture Precision Attachment; D003781:Denture Retention; D003832:Denture, Partial, Removable; D006047:Gold Alloys; D006801:Humans; D008334:Mandible; D016876:Metal Ceramic Alloys; D008954:Models, Biological; D010780:Photogrammetry; D012399:Rotation; D013314:Stress, Mechanical; D014085:Tooth Migration / Q000473:pathology*
chemical_list: D002858:Chromium Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys