Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

10 questions · 10 findings · 2 reviews · Periodontology

No studies found 0 · 0%GRADE not reported 7 · 70%Very low 0 · 0%Low 3 · 30%Moderate 0 · 0%High 0 · 0%

Cleft lip and/or palate (CL/P) vs Healthy controls without cleft

Gingival index (GI) · Individuals assessed for periodontal health (mainly children and adolescents, age >2 years)

Persons with orofacial cleft have a higher gingival index than healthy controls (MD 0.15, 95% CI 0.11 to 0.19; low certainty).

1 finding from 1 review

Cleft lip and/or palate (CL/P) vs Healthy controls without cleft

Clinical attachment level (CAL) · Individuals assessed for periodontal health (mainly children and adolescents, age >2 years)

Clinical attachment level loss is greater in persons with orofacial cleft than in healthy controls (p<0.00001), but no pooled effect size was reported (ungraded).

1 finding from 1 review

Cleft lip and/or palate (CL/P) vs Healthy controls without cleft

Bleeding Index (BI) · Individuals assessed for periodontal health (mainly children and adolescents, age >2 years)

Bleeding index is significantly higher in persons with orofacial cleft than in healthy controls (p<0.0001), but no pooled effect size was reported (ungraded).

1 finding from 1 review

Cleft lip and/or palate (CL/P) vs Healthy controls without cleft

Oral microbiota composition · Individuals assessed for oral microbiota (mainly children and adolescents)

Oral microbiota composition differs between persons with orofacial cleft and healthy controls, synthesized qualitatively across 8 studies but not meta-analyzed (ungraded).

1 finding from 1 review

Cleft lip and/or palate (CL/P) vs Healthy controls without cleft

Probing pocket depth · Individuals assessed for periodontal health (mainly children and adolescents, age >2 years)

Persons with orofacial cleft have a greater probing pocket depth than healthy controls (MD 0.88, 95% CI 0.82 to 0.95; low certainty).

1 finding from 1 review

Cleft lip and/or palate (CL/P) vs Healthy controls without cleft

Plaque · Individuals assessed for periodontal health (mainly children and adolescents, age >2 years)

Persons with orofacial cleft have a higher plaque index than healthy controls (MD 0.29, 95% CI 0.24 to 0.34; low certainty).

1 finding from 1 review

Non-syndromic cleft lip and palate (CLP) status and its oral microbiota (exposure/grouping) vs Children and adolescents aged 0-18 years without CLP (controls)

Dental caries · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

Pooling 3 studies, children/adolescents with CLP were about 2.03 times more likely to have dental caries than non-CLP controls (p<0.005; low heterogeneity), though most included studies were at high risk of bias; the evidence is ungraded.

1 finding from 1 review

Non-syndromic cleft lip and palate (CLP) status and its oral microbiota (exposure/grouping) vs Children and adolescents aged 0-18 years without CLP (controls)

Lactobacillus spp. salivary/plaque counts (cariogenic microbiota) · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

A meta-analysis found no significant difference in mean Lactobacillus spp. levels between children with and without CLP, with high heterogeneity; the evidence is ungraded.

1 finding from 1 review

Non-syndromic cleft lip and palate (CLP) status and its oral microbiota (exposure/grouping) vs Children and adolescents aged 0-18 years without CLP (controls)

Streptococcus mutans count · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

A meta-analysis of 2 studies found no difference in mean Streptococcus mutans levels between children with and without CLP, with very high heterogeneity; the evidence is ungraded.

1 finding from 1 review

Non-syndromic cleft lip and palate (CLP) status and its oral microbiota (exposure/grouping) vs Children and adolescents aged 0-18 years without CLP (controls)

Periodontal conditions (gingival inflammation, bleeding on probing, probing depth, clinical attachment loss) · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

Narrative synthesis of 6 studies suggests children/adolescents with CLP have poorer periodontal status (higher gingival and plaque indices, deeper probing, more bleeding and attachment loss) and harbor periodontopathogens; no pooled estimate and the evidence is ungraded.

1 finding from 1 review