Research
Mixed
Subgingival instrumentation (periodontal therapy) significantly reduces glycated hemoglobin (HbA1c) levels in patients with type 2 diabetes, demonstrating a bidirectional benefit where treating periodontitis improves metabolic control.
If you have diabetes and gum disease, getting your gums treated by a dentist is not just about saving your teeth; it helps lower your blood sugar levels. Standard cleaning (subgingival instrumentation) has been shown to reduce HbA1c by nearly 0.3%, which is clinically meaningful for metabolic control.
GoodSupportsHIGH confidence
The meta-analysis summarized the results from 12 randomized controlled trials with at least 6 months follow-up and demonstrated that subgingival instrumentation resulted in 0.29% (95% CI: 0.10– 0.47) lower glycated hemoglobin (HbA1c) levels when compared to nonactive treatment.
Why this rating
Based on a meta-analysis of 12 RCTs, though heterogeneity was noted.
Source
Periodontitis and metabolic diseases (diabetes and obesity): Tackling multimorbidity
Crystal Marruganti et al. · Periodontology 2000 · 2023
DOI 10.1111/prd.12536
narrative_reviewCited 76×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Obesity increases the risk and severity of periodontitis through systemic inflammation and adipokine release, creating a bidirectional relationship where higher BMI correlates with poorer periodontal outcomes.Good
- Combined adherence to healthy lifestyle factors (Mediterranean diet, physical activity, non-smoking, moderate alcohol, ideal weight) significantly reduces the risk of developing periodontitis and tooth loss.Moderate
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →