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Masticatory function and oral health‐related quality of life of patients with atrophic and non‐atrophic mandibles using implant‐retained mandibular overdentures: 3‐year results of a prospective clinical study
Author(s) -
Schuster Alessandra Julie,
Possebon Anna Paula da Rosa,
MarcelloMachado Raissa Micaella,
ChagasJúnior Otacílio Luiz,
Faot Fernanda
Publication year - 2020
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/joor.13072
Subject(s) - masticatory force , medicine , dentistry , swallowing , mandible (arthropod mouthpart) , atrophy , quality of life (healthcare) , implant , tooth loss , orthodontics , oral health , surgery , nursing , botany , biology , genus
Background Long‐term changes in masticatory function, oral health‐related quality of life (OHRQoL) and prosthetic complications in implant‐retained mandibular overdenture (IMO) wearers as a function of bone atrophy require detailed investigations. Objective Investigating the evolution of masticatory function, OHRQoL and prosthetic occurrences of IMO wearers according to mandibular bone atrophy over 3 years of usage. Methods This study evaluated 26 IMO wearers after 2 and 3 years of IMO loading categorised according to mandibular resorption degree into atrophic mandible (AM) and a non‐atrophic mandible (NAM) group. Masticatory function was assessed by the Masticatory Performance (MP) and Swallowing Threshold (ST) tests; OHRQoL and satisfaction via the Dental Impact on Daily Living (DIDL) questionnaire; and the prosthetic maintenance requirements and complications were monitored. Results After the second year, the AM Group performed 32% more cycles ( P  = .047) than the NAM Group during the ST test. The DIDL questionnaire showed no significant difference for all domains, except for a moderate effect size in the General Performance domain after the third year. AM Group had more prosthetic occurrences (n = 109) than NAM Group (n = 60) in the first year, mainly due to Equator attachment dislodgment. During the third year, NAM Group presented a greater number of events (n = 45) than AM Group (n = 21) due to the greater number of O‐ring exchanges. Conclusion Masticatory function and OHRQoL are not related to mandibular bone atrophy until 3 years after IMO rehabilitation. The prosthetic complications profile differs between groups, mainly in the first year.

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