Oral hygiene status in individuals with hearing difficulties: A systematic review and meta-analysis

Most studies focusing on oral hygiene status in hearing impaired individuals are cross-sectional and focus on specific populations. A comprehensive literature search and evidence-based analysis was carried out to assess the oral hygiene status in this special group of population.

Searches were conducted in four databases with no restriction on publication date. Cross-sectional and comparative cross-sectional studies assessing the oral hygiene status and periodontal status of hearing impaired individuals using standardized evaluation criteria were included. Study selection, data extraction, and assessment of bias were carried out by four reviewers and oral hygiene, plaque, and gingival status were assessed. The risk of bias assessment was carried out by New Castle Ottawa Quality Assessment Scale. 29 relevant publications that fulfilled the eligibility criteria were included in the systematic review whereas six studies each assessing oral hygiene and plaque status and five studies evaluating the gingival status were included in the Meta-analysis.

Eight thousand eight hundred and ninety (8890) potentially relevant references were identified in the systematic literature search. The overall analysis of the included studies revealed a mean oral hygiene index score of 1.60 (95% CI 0.91-2.30), Gingival Index scores 1.27 (95% CI 1.02-1.51), and Plaque Index score 0.99 (95% CI 0.75-2.30) among the hearing impaired individuals.

The present study reported fair oral hygiene, fair plaque status, and moderate gingivitis among the hearing impaired individuals.