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Evidence found and GRADE certainty

5 questions · 9 findings · 1 reviews · Dental caries

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Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Noncarious/cervical lesions and tooth wear (measures other than pooled dental erosion) · General population (children and adults) assessed for dental hard-tissue health

Beyond dental erosion, vegetarians tended to have a higher prevalence of other NCCL and tooth wear than nonvegetarians, reported narratively (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Eleven studies reported on NCCL using six definitions (presence of NCCL, presence of dental erosion, presence and severity of tooth wear, dental abrasion, cervical buccal defects); the six reporting presence of dental…
    Studies not reported
    GRADE not reported

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Dental caries measures other than pooled DMFT (DMFS, decayed/filled surfaces and teeth, root caries, nonvisible lesions, white spots) · General population (children and adults) assessed for dental hard-tissue health

Evidence on other dental-caries measures was inconsistent: some indices (decayed surfaces/teeth, root caries, white spots) were higher in vegetarians while some studies found lower caries in vegetarian children (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Eleven studies reported dental caries using 11 definitions; four (DMFT) were meta-analysed (see O2). Narrative findings were inconsistent: DMFS results were mixed; decayed surfaces and decayed teeth and percentages of…
    Studies not reported
    GRADE not reported

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Dental erosion · General population (children and adults) assessed for dental hard-tissue health

Among adults and excluding the outlier study, vegetarian diet was associated with higher odds of dental erosion with no heterogeneity (OR 2.56, 95% CI 1.77 to 3.71; ungraded).

4 findings from 1 review
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Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Number of natural teeth (missing/present teeth, edentulousness, MT component of DMFT) · General population (children and adults) assessed for dental hard-tissue health

Evidence on the number of natural teeth was conflicting and could not be pooled (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Seven studies reported on the number of teeth with conflicting findings; meta-analysis was not possible due to inconsistent outcome definitions. One study found vegetarians had significantly more teeth; two found no…
    7 studies
    GRADE not reported

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Caries experience (mean DMFT) · General population (children and adults) assessed for dental hard-tissue health

Among adults, the lower DMFT score in vegetarians was smaller and not statistically significant (mean difference -0.09, 95% CI -0.32 to 0.13; ungraded).

2 findings from 1 review