title: Complete denture displacement following open-mouth reline.
abstract: In 21 complete denture wearers, six upper and 15 lower denture relines were performed with the open-mouth technique. The centric relation (CR) was recorded with the Central-Bearing-Point (CBP) method three times before and three times after the reline. For each registration, the right and left condylar position was recorded in three dimensions using a custom-made measuring device. The average denture displacement from an initial reference position (CR) was calculated for each registration. An upper denture reline leads to a mean displacement of 2·5 mm, both in the right and left condylar area. With an average of 2·0 mm, this displacement was smaller following a lower denture reline (right and left mean, 1·6 mm). The precision of the CBP-registrations proved 0·5 mm before and 0·3 mm after reline; hence, the measured condylar displacement after reline could not attribute to a methodological bias. This clinical-experimental study demonstrates that relining complete dentures with the open-mouth technique may lead to a substantial denture shift and thus imply inevitably clinically relevant occlusal discrepancies. It is therefore important to carefully check the occlusion at denture delivery and remount the prostheses if necessary.
authors: Department of Prosthetic Dentistry, Propaedeutics and Dental Materials, University of Bonn, Bonn, Germany. karl-heinz.utz@ukb.uni-bonn.de
authors: K-H
authors: KH
authors: Utz
authors: D
authors: D
authors: Schneider
authors: J
authors: J
authors: Feyen
authors: M
authors: M
authors: Grüner
authors: S
authors: S
authors: Bayer
authors: R
authors: R
authors: Fimmers
authors: F
authors: F
authors: Müller
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016302:Centric Relation; D003725:Dental Articulators; D003766:Dental Occlusion; D003823:Denture Rebasing; D003824:Denture, Complete; D003826:Denture, Complete, Lower; D003827:Denture, Complete, Upper; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007574:Jaw Relation Record / Q000295:instrumentation / Q000379:methods; D008297:Male; D008335:Mandibular Condyle / Q000033:anatomy & histology; D008875:Middle Aged; D013997:Time Factors