Background: Institutionalization is a global phenomenon and its impact on elderly's quality of life (QoL) is under discussion. This systematic review and meta-analysis evaluated the influence of the institutionalization on elderly's QoL. Methods: Searches were performed in Medline, Scopus, Web of Science, Lilacs, Cochrane Library and SIGLE by two independent reviewers up to May 2019. The eligibility criteria were based on PECO strategy, considering observational studies in elderly (P), which were (E) or not (C) institutionalized to identify differences in their QoL (O). For qualitative synthesis, data were extracted and risk of bias was evaluated through a validated guideline. Meta-analysis was based on Mean Difference (MD) and Standard Mean Difference (SMD) calculation (p ≤ 0.05). The evidence was quality-tested using Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. Results: The initial search identified 3841 articles. Duplicates were removed, titles and abstracts were read and eligibility criteria were applied, remaining 16 sixteen cross-sectional studies that were included for data extraction and qualitative synthesis. Out of 16 articles, 14 evaluated the Health-Related Quality of Life, using Leipad (n = 2), WHOQOL-BREF and/or OLD (n = 8), SF-36 or RAND-36 (n = 4) questionnaires, and two assessed the Oral Health-Related Quality of Life, through GOHAI questionnaire. One eligible article was considered as low risk of bias. In the meta-analysis, 12 studies were included. Leipad questionnaire did not show differences on elderly's QoL (MD 0.11 [− 0.10, 0.32] I 2 = 76%). Differences on elderly's QoL were detected through WHOQOL-BREF (SMD-0.70 [CI95%: − 0.94, − 0.47] I 2 = 93%), WHOQOL-OLD (SMD-1.13 [− 1.47, − 0.80] I 2 = 91%) and SF-36/RAND-36 (MD-5.97 [CI95%: − 11.29, − 0.64] I 2 = 90%). All studies had very low or low certainty of evidence, since the study design influenced evidence classification, and show high heterogeneity. Conclusion: Although the institutionalization influences negatively the elderly's QoL, further well-designed studies are needed to confirm this evidence.

Background: Masticatory function of institutionalised elders and its relationship with nutrition and oral health-related quality of life (OHRQoL) are unknown. Objectives: This multicentre cross-sectional study evaluated the influence of the presence of teeth and dentures on masticatory function (masticatory performance and swallowing threshold) in institutionalised elders. Correlation of masticatory function with nutrition and OHRQoL was also verified. Methods: Older adults (n = 344; mean age (SD) = 77.70 (9.10)), selected from nursing homes in two Brazilian cities, were classified as edentulous with or without complete dentures (CDs), and partially dentate with or without prosthesis. Masticatory performance was assessed using a two-colour chewing gum. Swallowing threshold was set by the number of chewing cycles performed until swallowing 3.7 g of peanuts. Nutrition was screened by Mini-Nutritional Assessment-Short Form and body composition. OHRQoL was evaluated through Geriatric Oral Health Assessment Index (GOHAI) and Oral Health Impact Profile (OHIP-14). The Kruskal-Wallis test and Spearman's correlation were used (α = 0.05). Results: Edentulous elders without CDs had lower masticatory performance than those with CDs and partially dentate with or without prosthesis (P < .05). Swallowing threshold of edentulous elders with CDs and partially dentate with prosthesis was greater than edentulous elders without CDs and partially dentate without prosthesis (P < .05). Masticatory function was not correlated with nutrition. Masticatory performance was correlated (P < .05) with GOHAI (r 2 = −.154) and swallowing threshold with GOHAI (r 2 = .162) and OHIP-14 (r 2 = −.146). Conclusion: The absence of teeth and dentures negatively affected the masticatory function. Although the masticatory function was not correlated with institutionalised elders' nutrition, their OHRQoL was negatively impacted.

Individuals with CP had low HRQoL and OHRQoL scores. The impact on HRQoL was shown to be associated with gender, health perception. and communication skills. Regarding OHRQoL, the presence of impact was associated with age, gastroesophageal reflux, dental caries. and periodontal diseases.

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