title: Swallowing thresholds of mandibular implant-retained overdentures with variable portion sizes.
abstract: We analysed the effect of three portion sizes Optocal Plus (small, medium and large) on swallowing thresholds in subjects with either conventional complete dentures or mandibular implant-retained overdentures (transmandibular and permucosal cylindric implants). Tests were carried out in 52 women and 15 men (mean age 59 years) 4 years after treatment in a randomised controlled clinical trial. The results indicated that the degree of mucosal support for the mandibular denture did not affect the number of chewing strokes, time till swallowing or swallowed particle size. Only the chewing rate differed: subjects wearing mandibular implant-retained overdentures chewed the food at a higher rate than complete-denture wearers. With larger portion sizes, subjects needed significantly more chewing strokes and time until swallowing and they would have swallowed larger particles. Men chewed their food more efficiently than women, as they used the same number of chewing strokes and time, but achieved a greater particle size reduction at the swallowing moment.
authors.affiliation: Department of Oral Function and Prosthetic Dentistry, University Medical Centre, Nijmegen, The Netherlands. F.A.Fontijn@med.uu.nl
authors.forename: Francina A
authors.initials: FA
authors.lastname: Fontijn-Tekamp
authors.forename: Ad P
authors.initials: AP
authors.lastname: Slagter
authors.forename: Andries
authors.initials: A
authors.lastname: Van der Bilt
authors.forename: Martin A
authors.initials: MA
authors.lastname: Van't Hof
authors.forename: Warner
authors.initials: W
authors.lastname: Kalk
authors.forename: John A
authors.initials: JA
authors.lastname: Jansen
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D003679:Deglutition / Q000502:physiology*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003781:Denture Retention; D003826:Denture, Complete, Lower; D003828:Denture, Overlay; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible / Q000601:surgery*; D008409:Mastication / Q000502:physiology*; D008875:Middle Aged; D010316:Particle Size; D012684:Sensory Thresholds / Q000502:physiology*; D012737:Sex Factors; D013997:Time Factors
chemical_list: D015921:Dental Implants