title: Masticatory function parameters in patients with varying degree of mandibular bone resorption.
abstract: OBJECTIVE
  This cross-sectional study analyzes how bone resorption affects the masticatory function and investigates the relation between perceived and measured masticatory function.
  
  
  METHODS
  Thirty complete dentures wearers were divided in two groups according to mandible bone atrophy based on the classification criteria from Cawood & Howell. Retention and stability of the mandibular complete denture, masticatory performance (MP) indexes (X_50 and B) and masticatory efficiency (ME, sieves 4 and 2.8) were evaluated. Geriatric Oral Health Assessment Index (GOHAI) and Dental Impact on Daily Living (DIDL) questionnaires were completed by the patients.
  
  
  RESULTS
  A strong correlation between bone atrophy and poor retention was found (P=0.0132). Neither masticatory performance indexes nor GOHAI and DIDL domains showed statistical differences (P>0.05) when patients were compared according to the atrophy criteria. Mandibular length showed a negative correlation with ME4, showing a positive association (R2=0.17, β=-0.67, P=0.029). Mandibular denture retention was significantly correlated with MPB (P=0.01) and ME2.8 (P=0.01). GOHAI showed a positive association between the physical and the functional domains and ME2.8 (R2=0.17; β=1.22; P=0.02). DIDL showed a negative association between ME4 and oral comfort domain (R2=0.16; β=-2.94; P=0.02).
  
  
  CONCLUSIONS
  Mandibular bone height does not directly affect the masticatory function and is inversely correlated with the self-perceived masticatory ability.
authors.affiliation: Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil.
authors.forename: Raissa Micaella
authors.initials: RM
authors.lastname: Marcello-Machado
authors.affiliation: Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil.
authors.forename: Amália Machado
authors.initials: AM
authors.lastname: Bielemann
authors.affiliation: Department of Semiology and Clinics, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
authors.forename: Gustavo Giacomelli
authors.initials: GG
authors.lastname: Nascimento
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
authors.forename: Luciana de Rezende
authors.initials: LR
authors.lastname: Pinto
authors.affiliation: Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil.
authors.forename: Altair Antoninha
authors.initials: AA
authors.lastname: Del Bel Cury
authors.affiliation: Department of Semiology and Clinics, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil. Electronic address: fernanda.faot@gmail.com.
authors.forename: Fernanda
authors.initials: F
authors.lastname: Faot
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001284:Atrophy; D001862:Bone Resorption / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology* / Q000523:psychology; D003430:Cross-Sectional Studies; D003781:Denture Retention; D003824:Denture, Complete; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000503:physiopathology / Q000523:psychology; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology; D008336:Mandibular Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology* / Q000523:psychology; D008409:Mastication / Q000502:physiology*; D008875:Middle Aged; D012649:Self Concept; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires
keywords: Alveolar bone loss; Complete denture; Denture retention; Edentulous jaw; Mastication; Prosthodontics