Dental Pulp Stones: Correlation with Metabolic Diseases

What Are Pulp Stones?

• True denticles - contain dentinal tubules, resemble dentin
• False denticles - concentric mineralized lamellae without tubules (most common)
• Diffuse calcifications - irregular deposits along collagen fibers or vessels

Pathophysiological Link to Metabolic Disease

1. Endothelial dysfunction - high glucose, dyslipidemia, and hypertension damage endothelium, promoting intimal calcification
2. Altered calcium-phosphate metabolism - in diabetes and chronic kidney disease (CKD), impaired regulation of mineral homeostasis accelerates ectopic mineralization throughout the body
3. Chronic low-grade inflammation - metabolic disease promotes a pro-inflammatory milieu (elevated IL-6, TNF-α, CRP) in pulp tissue, which activates odontoblast-like cells and mineralizing pathways
4. Oxidative stress - increased reactive oxygen species in diabetic and hypertensive states promote calcification of soft tissues
5. Generalized ectopic calcification tendency - pulp stones may reflect a systemic propensity for soft-tissue mineralization, manifesting in coronary arteries, carotid walls, kidneys, and dental pulp simultaneously

Disease-by-Disease Evidence

1. Cardiovascular Disease (CVD) / Atherosclerosis

• A meta-analysis in the Journal of Endodontics (Almadhoon et al., 2022) pooled 19 studies and found a significant association between pulp stones and CVD (OR 3.35; 95% CI 1.91-5.89; p < 0.001). The association was even stronger in patients >40 years old (OR 8.78; 95% CI 3.64-21.17). No significant association was found with renal stones. [PMID: 35447295]
• A separate meta-analysis (Parashar et al., 2022) of 10 studies found CVD patients were significantly more likely to have pulp calcifications (OR 4.30; 95% CI 2.19-8.46). Seven of 10 included studies showed a statistically significant positive association, though overall evidence certainty (GRADE) was rated low due to heterogeneity and publication bias. [PMID: 35718431]
• Regarding calcified atherosclerotic plaques (CAP) specifically, a 2023 meta-analysis (Vieira et al.) pooled 7 studies (3,770 participants from 5 countries) and found patients with pulp stones were more likely to also have CAP in carotid or coronary arteries (OR 1.70; 95% CI 1.21-2.38, I² = 0%). Evidence certainty was rated very low by GRADE. [PMID: 37052394]

2. Diabetes Mellitus (Type 2)

• A 2025 retrospective observational study (Baghestani et al.) of 107 diabetic patients vs. 300 healthy controls found the relative risk of pulp stones in diabetics was 1.8 (95% CI: 1.3-2.48; p < 0.05). Carotid artery calcification was also significantly higher in diabetics (41.1% vs. 14%). The authors suggest panoramic radiographic screening in diabetics for early detection of vascular calcifications. [PMID: 40759953]
• A 2024 histopathological study (Khan et al., JOMFP) examined 100 patients with type II diabetes and hypertension and found a definite relationship between increased pulp stones and both conditions, as well as a significant link between poor periodontal health and pulp stone formation. [PMID: 39157846]
• A 2025 cross-sectional study (Gökyar et al., BMC Oral Health) of 400 patients divided into CVD-only, DM-only, CVD+DM, and healthy groups found overall pulp stone prevalence was 59.5%. Interestingly, prevalence was actually highest in the healthy control group (69%), followed by CVD+DM (65%), CVD (60%), and lowest in the DM-only group (44%). Differences were statistically significant (p = 0.002) but did not show a consistent pattern favoring systemic disease groups - the authors concluded that pulp stone formation is likely multifactorial and not solely driven by systemic conditions. [PMID: 41413543]

3. Hypertension

• The histopathological study by Khan et al. (2024) specifically demonstrated increased pulp stone frequency in hypertensive patients. Hypertension accelerates arteriolar sclerosis within pulp vessels, creating the substrate for calcific deposits. [PMID: 39157846]
• A prevalence study by Jawahar et al. (2021) found a significant association between pulp stones and both hypertension and hyperlipidemia. [PMID: 35017969]

4. Hyperlipidemia / Dyslipidemia

• Dyslipidemia shares the same pathological vascular pathway. Elevated LDL promotes endothelial oxidative stress and macrophage foam cell formation, contributing to both atherosclerosis and soft-tissue calcification.
• Jawahar et al. (2021) found a significant hospital-based association between hyperlipidemia and pulp stone prevalence. [PMID: 35017969]

5. Chronic Kidney Disease (CKD) / Renal Disease

• Patients on hemodialysis - who have severely disordered calcium-phosphate metabolism with secondary hyperparathyroidism - are a population at high risk for metastatic soft-tissue calcification. A 2019 study (Gunen Yilmaz et al.) found a significant relationship between carotid artery calcification and pulp stones in hemodialysis patients. [PMID: 31464230]
• The Almadhoon et al. (2022) meta-analysis, however, found no significant overall association between pulp stones and renal stones specifically - suggesting the mechanism may differ between CKD/vascular calcification and urolithiasis. [PMID: 35447295]

Summary Table

Clinical Significance

1. Incidental finding on panoramic X-ray with diagnostic value: Pulp stones detected on routine dental radiographs - especially multiple, bilateral, or in younger patients - may prompt referral for cardiovascular or metabolic risk assessment.
2. Endodontic difficulty: Pulp stones complicate root canal treatment by obstructing canal access and file passage.
3. Shared pathogenesis with systemic calcification: The dental pulp may serve as a "window" into systemic vascular calcification burden, accessible non-invasively via panoramic radiography.
4. Population screening potential: Given that panoramic X-rays are routine in dental practice, they represent an untapped opportunity to flag metabolic disease risk - particularly cardiovascular disease in patients over 40.

Important Caveats

• Most studies are observational and cross-sectional - causality cannot be established
• Significant heterogeneity exists across studies in methodology, pulp stone detection method (radiographic vs. histological), and patient populations
• Confounding factors (age, sex, diet, fluoride exposure, dental caries, genetics) are incompletely controlled
• The 2025 Gökyar study finding higher prevalence in healthy controls serves as a reminder that pulp stones are common in the general population (lifetime prevalence estimates range from 8% to 90% depending on detection method) and must not be over-interpreted in isolation