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Chronic kidney disease is associated with increased plaque, calculus, and gingival inflammationChronic kidney disease linked to significant oral health problems

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Key Takeaway
Note that patients with CKD show increased plaque, calculus, and gingival inflammation compared to healthy individuals.

This meta-analysis synthesized data from 24 studies to evaluate the impact of chronic kidney disease (CKD) on oral health parameters in patients with stages 1 through 4 of the disease compared to healthy individuals. The analysis focused on indicators including plaque and calculus accumulation, gingival inflammation, bleeding on probing levels, and salivary characteristics.

The meta-analysis found that patients with early- and advanced-stage CKD had significantly higher plaque and calculus accumulation than healthy controls. Furthermore, these patients exhibited pronounced gingival inflammation, increased gingival index scores, and higher bleeding on probing levels. Salivary analysis revealed significantly higher pH levels but reduced salivary flow rates in the CKD cohort.

While the meta-analysis reports a strong relationship between CKD and these oral health changes, the study design is based on observational and clinical data; therefore, causality cannot be established. The results suggest that clinicians should consider rapid referral to a dentist during CKD progression and establish patient-specific recall intervals for those with renal impairment.

How this fits prior evidence

This meta-analysis addresses a gap in understanding the systemic manifestations of chronic kidney disease by identifying specific oral health impacts. While previous coverage has focused on nutritional interventions, pharmacological treatments like finerenone to reduce UACR, and molecular mechanisms such as mitochondrial metabolic reprogramming or the role of natural products in renoprotection, this finding highlights the importance of dental involvement in CKD management.

Living with chronic kidney disease can affect more than just your internal organs. New data shows a strong link between kidney health and the health of your mouth. Patients with both early and advanced stages of kidney disease showed significant signs of dental issues when compared to healthy people.

Specifically, patients with these conditions had much higher levels of plaque and calculus buildup on their teeth. They also experienced more gum inflammation and bleeding during dental exams. These changes happen regardless of whether the kidney disease is in its early or advanced stages.

The study also found that saliva changes in those with kidney issues. Their saliva had a higher pH level and lower flow rates than healthy people. While these results show a strong connection between the two conditions, researchers note that this data shows an association rather than proving one causes the other.

What this means for you:
People with chronic kidney disease often experience more plaque, gum inflammation, and changes in saliva levels.

Common questions

How does kidney disease affect the mouth?

People with chronic kidney disease often have more plaque and calculus on their teeth compared to healthy people. They also experience higher levels of gum inflammation, higher bleeding during probing, and changes in their saliva, such as higher pH levels and lower flow rates.

Does this affect people with early-stage kidney disease?

Yes. The data shows that these oral health issues, including plaque buildup and gum inflammation, are present in patients with both early-stage and advanced-stage chronic kidney disease (stages 1 through 4).

What specific changes occur in saliva?

Patients with chronic kidney disease showed significantly higher salivary pH levels and reduced salivary flow rates compared to healthy individuals. These findings suggest that kidney health is closely linked to the environment of the mouth.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedAug 2026
View Original Abstract ↓
It is essential to identify oral health changes in the early stages of chronic kidney disease (CKD) to prevent oral degeneration. The effects of early-stage CKD on the periodontium and the manifestation of associated oral symptoms remain poorly understood. Periodontitis is well documented in late-stage CKD. These changes represent a considerable burden for patients, leading to consequences like tooth loss and stomatognathic disorders. This study evaluates oral health parameters in patients with early- and advanced-stage CKD (stages 1-4), to identify potential changes in oral health and provide important insights into CKD-specific dental treatment. We performed a comprehensive literature search of the databases 'Pubmed', 'Web of Science', 'ClinicalTrials.gov', and 'Cochrane' up to June 2025. Of 1,584 search results, 24 studies met the inclusion criteria. The meta-analysis revealed that patients with early- and advanced-stage CKD exhibited significantly higher levels of plaque and calculus accumulation compared to healthy patients. These patients experienced pronounced gingival inflammation, elevated gingival index scores, and increased 'bleeding on probing' levels. They demonstrated significantly higher salivary pH levels and reduced salivary flow rates. There is a strong relationship between early and advanced-stage CKD and increased oral inflammation, plaque accumulation, and reduced saliva flow rate. To prevent the dental health of these patients from deteriorating, it is crucial to refer them to a dentist rapidly during the progression of the disease. Based on their understanding of the impact of CKD on oral health, the dentist will then determine a patient-specific recall interval.
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