Oral Diseases and Adverse Pregnancy Outcomes in Sub-Saharan Africa: A Scoping Review

Abstract

This scoping review mapped and critically reviewed the extant literature exploring associations between oral disease status and adverse pregnancy outcomes among women residing in sub-Saharan Africa. A literature search was conducted in July 2023 using PubMed, Cochrane Library and Google Scholar. The articles selected were those published in the English language between 1990 and 2022. After screening 833 potential studies, 15 articles met the inclusion criteria. Among these, 12 (80.0%) adopted a descriptive research design, while 3 (20.0%) used experimental methodologies. Eight (53.3%) studies were conducted in East Africa, fourteen (93.3%) studies were hospital-based, and one (6.7%) study was community-based. Periodontitis was linked with low birth weight, preterm birth, preterm birth and low birthweight, stunting, wasting, and underweight in most studies. Periodontitis was, however, not linked with adverse pregnancy outcomes in four studies. Caries was not linked with adverse pregnancy outcomes, but its sequalae was linked with low birth weight, preterm birth, neonatal stunting, and small head circumference. Two studies showed that periodontal diseases were linked with preeclampsia and chorioamnionitis. Maternal poor oral hygiene was linked with stunting. Two other studies showed no links between maternal periodontal disease and preterm premature rupture of membranes, eclampsia, spontaneous abortion, and vaginal bleeding. Furthermore, two intervention studies found that the treatment of periodontal diseases during pregnancy reduced the risk of adverse pregnancy outcomes. Further studies are needed to fully elucidate the effect size of the links observed between oral diseases and adverse pregnancy outcomes in sub-Saharan Africa.