title: Patient ratings of chewing ability from a randomised crossover trial: lingualised vs. first premolar/canine-guided occlusion for complete dentures.
abstract: BACKGROUND
  Complex procedures involving a facebow transfer and the use of lingualised teeth are deemed to have a positive influence on the chewing ability with complete dentures.
  
  
  OBJECTIVE
  To determine if patients' ratings of their ability to chew depend on the method of complete denture fabrication.
  
  
  METHODS
  Edentulous patients (n = 20) participated in a within-subject crossover trial. Each patient received two sets of new complete dentures. One pair was manufactured based on intraoral tracing of centric relation and facebow transfer; semi-anatomical teeth with lingualised occlusion denture (LOD) were chosen. The second pair was made using a simplified procedure without facebow transfer; jaw relations were recorded with wax occlusion rims, and anatomical teeth with a first premolar/canine-guidance (CGD) were selected. The dentures were delivered in randomised order, and each was worn for 3 months. Three months after delivery, patients' ratings of each new prosthesis were recorded on visual analogue scales for their ability to chew seven index foods. Repeated measurements analysis of variance was performed to investigate possible carry-over effects accounting for confounding by treatment period.
  
  
  RESULTS
  When comparing the two treatments, participants rated their ability to chew in general, to masticate carrots, hard sausage, steak and raw apple in particular, was significantly better with the CGD (anatomical teeth) than with the LOD (p < 0.05).
  
  
  CONCLUSIONS
  Comprehensive methods for the fabrication of complete dentures including semi-anatomical lingualised teeth and a full registration do not seem to influence the perceived chewing ability, when compared with more simple procedures. Chewing ability for tough foods appears to benefit from the use of anatomical teeth.
authors.affiliation: Department of Prosthodontics, School of Dentistry, University Hospital, Freiburg, Germany. guido.heydecke@uniklinik-freiburg.de
authors.forename: Guido
authors.initials: G
authors.lastname: Heydecke
authors.forename: Ahmed Shadi
authors.initials: AS
authors.lastname: Akkad
authors.forename: Martin
authors.initials: M
authors.lastname: Wolkewitz
authors.forename: Michael
authors.initials: M
authors.lastname: Vogeler
authors.forename: Jens C
authors.initials: JC
authors.lastname: Türp
authors.forename: Joerg R
authors.initials: JR
authors.lastname: Strub
mesh_terms: D000368:Aged; D001641:Bicuspid; D018592:Cross-Over Studies; D003481:Cuspid; D003766:Dental Occlusion; D003779:Denture Design / Q000379:methods*; D003781:Denture Retention; D003824:Denture, Complete / Q000523:psychology; D005260:Female; D006801:Humans; D007574:Jaw Relation Record / Q000379:methods; D008297:Male; D008409:Mastication; D008875:Middle Aged; D003765:Models, Dental; D009066:Mouth, Edentulous / Q000523:psychology / Q000534:rehabilitation*; D017060:Patient Satisfaction; D014093:Tooth, Artificial