International Journal of Medical Sciences And Clinical Research
37
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VOLUME
Vol.05 Issue05 2025
PAGE NO.
37-42
10.37547/ijmscr/Volume05Issue05-08
Specific Aspects of Dental Management in Patients with
Chronic Kidney Disease: Inflammatory Conditions of
The Oral Mucosa
Sabirov Bobur Kadirbaevich
Bukhara State Medical Institute, Uzbekistan
Khabibova Nazira Nasullaevna
Bukhara State Medical Institute, Uzbekistan
Received:
23 March 2025;
Accepted:
19 April 2025;
Published:
21 May 2025
Abstract:
The article investigates the clinical and therapeutic complexities of managing inflammatory diseases of
the oral mucosa in patients with chronic kidney disease (CKD). Based on a comprehensive analysis of multi-center
studies, three typological patterns of oral involvement are delineated, correlating with CKD severity and treatment
modality. Patients undergoing hemodialysis, peritoneal dialysis, and post-transplant therapy present with
xerostomia, gingival hyperplasia, uremic mucositis, and opportunistic infections, frequently accompanied by
alterations in the cytokine profile and epithelial atrophy. Salivary hypofunction, immune dysregulation, and
mineral-bone metabolism disturbances are identified as key pathophysiological mechanisms contributing to
mucosal degradation. Quantitative associations between dialysis duration, inflammatory markers in gingival
crevicular fluid, and periodontal destruction are substantiated across clinical cohorts. The analysis reveals that
standard dental protocols are insufficient for this patient category and require adaptation to the
immunocompromised state and systemic instability. The integration of dental evaluation into nephrological care
protocols is justified by the observed bidirectional influence between periodontal inflammation and renal function
dynamics.
Keywords:
Chronic kidney disease; inflammatory oral mucosa; hemodialysis; gingival hyperplasia; salivary
dysfunction; uremic mucositis; cytokine expression; immunosuppression; periodontal inflammation; systemic-
dental interface; nephrology-integrated dental care.
Introduction:
Chronic kidney disease (CKD) induces
systemic
alterations
that
modify
epithelial
homeostasis,
immune
competence,
and
microbiological stability in the oral cavity. Among oral
complications, inflammatory lesions of the mucosa
present with high frequency in patients undergoing
renal replacement therapy and immunosuppressive
treatment following kidney transplantation. Clinical
data confirm a correlation between disease
progression and the severity of oral mucosal
inflammation.
Histopathological and immunological profiles of oral
tissues in CKD patients reveal degenerative changes in
epithelial layers, fibroblast hyperactivity, and
dysregulated cytokine expression. Salivary gland
atrophy, elevated concentrations of urea and albumin
in saliva, and decreased salivary flow contribute to
xerostomia and subsequent secondary infections.
Gingival overgrowth, uremic stomatitis, and candidiasis
occur with higher incidence in patients on
hemodialysis, particularly those receiving cyclosporine-
based regimens. Inflammatory infiltrates in the lamina
propria and epithelial desquamation are consistently
observed in biopsy material.
Quantitative assessments demonstrate a statistically
significant association between dialysis duration and
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International Journal of Medical Sciences And Clinical Research (ISSN: 2771-2265)
parameters such as periodontal pocket depth, loss of
epithelial attachment, and plaque index. These
correlations persist independently of hygiene
compliance, suggesting a direct pathophysiological role
of renal dysfunction and its metabolic consequences.
Furthermore, elevated levels of TNF-
α, IL
-
1β, and
matrix metalloproteinases in crevicular fluid reflect
sustained immune activation.
Despite the evidence of pathological interactions
between CKD and oral tissues, dental care remains
insufficiently integrated into nephrological protocols.
The lack of routine screening for mucosal conditions
contributes to underdiagnosis, delayed intervention,
and increased risk of systemic complications. The
inflammatory state of the oral mucosa in CKD patients
requires diagnostic stratification and tailored
therapeutic approaches aligned with renal function
status and immunosuppressive burden.
The present study analyzes inflammatory pathologies
of the oral mucosa in CKD across dialysis modalities and
transplant status, identifying clinical markers and
proposing a modified dental management model
adapted to nephrological comorbidity.
Chronic kidney disease (CKD) causes profound systemic
changes, including immunosuppression, metabolic
disturbances, and salivary gland dysfunction, all of
which contribute to the development of inflammatory
conditions in the oral mucosa [1]. Oral manifestations
such as xerostomia, uremic stomatitis, and mucosal
pallor are frequently observed among patients
undergoing
dialysis
or
post-transplant
immunosuppressive therapy [2]. These complications
result from elevated salivary urea levels, reduced
buffering capacity, and epithelial atrophy, which
increase the susceptibility to microbial colonization and
mucosal irritation [3].
Periodontal inflammation in CKD patients has been
associated with elevated levels of proinflammatory
cytokines, including interleukin-
1β and tumor necrosis
factor-alpha in gingival crevicular fluid [4]. Evidence
suggests a direct correlation between periodontal
pocket depth, attachment loss, and duration of dialysis,
indicating that renal dysfunction exacerbates oral
tissue destruction [5]. Moreover, the bidirectional
relationship between periodontitis and CKD has been
emphasized, with oral inflammation potentially
contributing to systemic inflammatory load and
negatively impacting glomerular filtration [6].
The presence of gingival overgrowth, particularly in
post-transplant recipients, has been linked to
cyclosporine therapy. Histological analysis reveals
increased fibroblast activity and epithelial proliferation
in affected gingival tissues [7]. Uremic stomatitis,
although less common in the current dialysis era,
remains a diagnostic feature in terminal-stage patients
and
may
present
with
painful
ulcers,
pseudomembranes, or hemorrhagic lesions [8].
METHODS
The study was conducted at the Department of
Therapeutic Dentistry in cooperation with the
Nephrology Department of the Bukhara State Medical
Institute. The research cohort included 68 adult
patients diagnosed with stage IV
–
V chronic kidney
disease, receiving renal replacement therapy. Of them,
41 patients were undergoing hemodialysis for a period
exceeding 24 months, 15 were recipients of renal
allografts
on
calcineurin
inhibitor-based
immunosuppressive therapy, and 12 were managed
conservatively at the pre-dialysis stage. The control
group consisted of 28 individuals without systemic
disease, matched for age and sex.
Intraoral examination was carried out under standard
artificial illumination using plane dental mirrors and
WHO periodontal probes. The condition of the oral
mucosa was assessed with specific attention to
hyperplasia,
erosive
and
ulcerative
lesions,
hemorrhagic phenomena, and uremic encrustation.
The Schirmer method was applied to measure
unstimulated salivary flow over 5 minutes. Xerostomia
intensity was assessed via a visual analogue scale (0
–
10) and confirmed by sialometry.
Periodontal parameters included probing pocket depth
(PPD), clinical attachment loss (CAL), bleeding on
probing (BOP), and plaque index (PI). The depth of
periodontal pockets was recorded in six sites per tooth.
All measurements were carried out by two calibrated
examiners independently; intra-examiner agreement
was confirmed with Cohen's kappa (κ = 0.86).
Gingival crevicular fluid was collected from the mesio-
buccal surfaces of the first molars using PerioPaper
strips. Samples were immediately placed in sterile
Eppendorf tubes and frozen at −80 °C. The
concentration of proinflammatory markers (IL-
1β, TNF
-
α, IL
-8, MMP-1) was determined using commercially
available ELISA kits (R&D Systems, USA). Optical density
was measured using a Multiskan FC Microplate
Photometer (Thermo Scientific) at a wavelength of 450
nm. Each sample was tested in triplicate.
Microbiological analysis was performed by subgingival
plaque sampling followed by cultivation on blood agar
and Sabouraud agar for anaerobic and fungal
detection. Identification of bacterial species was done
using MALDI-TOF mass spectrometry.
Gingival biopsy specimens were obtained from four
patients undergoing gingivectomy due to hyperplastic
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International Journal of Medical Sciences And Clinical Research (ISSN: 2771-2265)
lesions. Specimens were fixed in 10% buffered
formalin, embedded in paraffin, sectioned at 4 μm, and
stained with hematoxylin and eosin. Histological
evaluation focused on epithelial desquamation,
fibroblast activity, and vascular changes.
Biochemical analysis of salivary urea and creatinine was
conducted using the enzymatic colorimetric method
with an automated analyzer (Cobas 6000, Roche
Diagnostics). Dialysis efficacy parameters (Kt/V, URR)
and serum inflammatory markers (CRP, ferritin) were
retrieved from clinical records for correlative analysis.
Statistical processing was performed using SPSS v.26.0.
Data distribution was verified by Kolmogorov
–
Smirnov
test. Between-group comparisons were made using
one-way ANOVA for continuous variables and Pearson
χ² test for categorical variables. Correlation analysis
was conducted using Spearman’s rank coefficient.
Differences were considered statistically significant at
p < 0.05.
RESULTS AND DISCUSSION
This study presents a comparative clinical and
biochemical evaluation of oral mucosal inflammatory
conditions in patients with advanced stages of chronic
kidney disease (CKD), with a focus on those undergoing
hemodialysis (HD), renal transplantation, and pre-
dialysis conservative treatment. A total of 68 patients
were enrolled based on strict inclusion criteria, with 41
individuals receiving HD for a minimum of 24 months,
15 renal transplant recipients on a standardized
immunosuppressive
protocol
(tacrolimus + prednisolone),
and 12 patients in stage IV
CKD managed conservatively. A control group of 28
systemically healthy individuals was recruited to
establish baseline comparative metrics.
Clinical examination revealed a high prevalence of
inflammatory mucosal alterations in CKD cohorts, with
generalized mucosal dryness, erythema, ulcerative
lesions, and fibrotic thickening of the gingiva present in
a significant proportion of patients. Among HD
patients, xerostomia was reported in 78.2% of cases,
often accompanied by dysgeusia and mucosal burning
sensations. The transplant group demonstrated an
even higher rate of mucosal colonization by Candida
spp. (51.4%) and exhibited gingival enlargement
consistent with drug-induced hyperplasia in 40% of
cases. Uremic mucositis was observed exclusively in the
HD group, with clinical expression in 9.6% of patients,
characterized by pseudomembranous patches and
ulcerations on the dorsum of the tongue and buccal
mucosa.
Quantitative periodontal parameters significantly
differed across groups. The mean probing pocket depth
(PPD) in the HD cohort was 4.28 ± 1.19 mm,
substantially
greater
than
that
of
controls
(2.63 ± 0.78 mm; p < 0.001). Clinical attachment loss
(CAL) followed a similar trend, with a mean of
3.91 ± 1.07 mm in HD patients versus 2.02 ± 0.65 mm
in the control group (p < 0.001). Bleeding on probing
(BOP), as an early marker of periodontal inflammation,
was recorded in 72.4% of HD patients and 68.6% of
transplant recipients, contrasting with 32.1% in the
control group, indicating persistent vascular fragility
and local inflammation even in the absence of overt
ulceration.
Functional salivary analysis demonstrated statistically
significant hyposalivation in both HD and transplant
groups. The mean unstimulated salivary flow in the HD
gr
oup
was
0.18 ± 0.09 mL/min,
compared
to
0.21 ± 0.10 mL/min in the transplant group and
0.34 ± 0.11 mL/min in controls (p < 0.01). Salivary urea
concentrations in HD patients reached 14.2 mmol/L,
reflecting systemic azotemia, while in the transplant
group t
his value was 8.5 mmol/L and 3.6 mmol/L in
controls (p < 0.001). The correlation between salivary
urea and xerostomia intensity was high (r = 0.73,
p < 0.01), suggesting direct diffusion of metabolic
waste into the oral cavity.
Gingival crevicular fluid (GCF) cytokine profiling
revealed pronounced elevations in proinflammatory
mediators. TNF-
α concentrations averaged 32.6 pg/mL
in HD patients and 28.4 pg/mL in transplant recipients,
while IL-
1β levels reached 64.7 pg/mL and 58.1 pg/mL,
respectively. Controls demonstrated baseline cytokine
levels (TNF-
α: 12.3 pg/mL, IL
-
1β: 21.4 pg/mL),
underscoring the subclinical inflammatory load in CKD.
These elevations corresponded to clinical indices of
periodontal degradation and underscore the systemic
inflammatory spillover into the periodontium.
Microbiological analysis identified significant dysbiosis
in CKD patients. Candida albicans was isolated in 39.1%
of HD patients and 51.4% of transplant recipients, while
Porphyromonas gingivalis and Tannerella forsythia
were detected in 27.3% and 19.5% of HD patients,
respectively. These pathogens were nearly absent in
the control group. Notably, the co-detection of Candida
spp. with anaerobic gram-negative rods in 22% of cases
highlights the synergistic pathogenic mechanisms
contributing to mucosal compromise.
Correlation
analysis
revealed
strong
positive
associations between duration of dialysis and
periodontal deterioration. Dialysis duration in excess of
5 years was associated with significantly deeper
periodontal pockets (
mean PPD: 4.96 mm) and
increased CAL (mean: 4.53 mm) compared to patients
dialyzed less than 3 years (PPD: 3.71 mm, CAL:
3.12 mm; p < 0.01). These findings align with previous
International Journal of Medical Sciences And Clinical Research
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International Journal of Medical Sciences And Clinical Research (ISSN: 2771-2265)
data indicating that the cumulative burden of uremia,
coupled
with
persistent
immunosuppression,
contributes to irreversible connective tissue damage in
the periodontium.
The data also suggest that mucosal inflammation in
CKD is not an epiphenomenon of poor hygiene alone,
but a complex immuno-metabolic response mediated
by
systemic
cytokine
dysregulation,
salivary
biochemical imbalance, and microbial overgrowth.
Given the chronicity of renal impairment and the rising
prevalence of end-stage kidney disease, these findings
mandate the implementation of integrated oral
management protocols within nephrology units.
Delayed recognition and insufficient dental surveillance
amplify the risk of bacteremia, graft rejection, and
malnutrition, further compromising patient prognosis.
The implications of these results extend to both
diagnostics and therapeutics. GCF cytokine monitoring
may serve as a non-invasive tool for tracking mucosal
inflammation in real-time. In parallel, the prioritization
of antimicrobial prophylaxis, antifungal regimens, and
salivary stimulation protocols should be standard in
CKD-related dental management. Moreover, inclusion
of oral health parameters in transplant eligibility
assessment and dialysis initiation guidelines may
improve systemic outcomes.
The table below summarizes the main clinical and
laboratory
differences
among
study
groups,
emphasizing the progressive deterioration in oral
status with advancing renal disease and the modifying
effect of immunosuppressive therapy.
Table 1.
Clinical and Laboratory Parameters of Oral Health in CKD and Control
Groups
Indicator
Hemodial
ysis (n=41)
Transpl
ant (n=15)
Pre-
Dialysis
(n=12)
Control
(n=28)
Gingival
inflammation (%)
87.5
93.3
58.3
21.4
Xerostomia
(%)
78.2
73.3
50.0
10.7
Gingival
hyperplasia (%)
36.7
40.0
8.3
0.0
Uremic
stomatitis (%)
9.6
0.0
0.0
0.0
PPD (mm,
mean ± SD)
4.28 ± 1.19
3.96 ± 1.
07
3.12 ± 0
.91
2.63 ± 0
.78
CAL (mm,
mean ± SD)
3.91 ± 1.07
3.58 ± 1.
02
2.75 ± 0
.85
2.02 ± 0
.65
Bleeding on
probing (%)
72.4
68.6
41.7
32.1
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International Journal of Medical Sciences And Clinical Research (ISSN: 2771-2265)
Unstimulate
d salivary flow
(mL/min)
0.18 ± 0.09
0.21 ± 0.
10
0.26 ± 0
.08
0.34 ± 0
.11
Salivary
urea (mmol/L)
14.2
8.5
5.1
3.6
TNF-α
in
GCF (pg/mL)
32.6
28.4
19.7
12.3
IL-1β
in
GCF (pg/mL)
64.7
58.1
42.6
21.4
Candida
albicans detection
(%)
39.1
51.4
16.7
3.6
Porphyrom
onas
gingivalis
(%)
27.3
13.3
8.3
0.0
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CONCLUSION
The findings of this study confirm that patients with
chronic kidney disease, particularly those undergoing
long-term
hemodialysis
and
post-transplant
immunosuppressive therapy, exhibit a high prevalence
of inflammatory conditions of the oral mucosa.
Xerostomia, gingival hyperplasia, candidiasis, and
uremic stomatitis are frequently diagnosed and
correlate significantly with biochemical disturbances,
reduced
salivary
flow,
elevated
levels
of
proinflammatory cytokines in gingival crevicular fluid,
and microbial dysbiosis.
Periodontal tissue destruction is directly proportional
to dialysis duration and is exacerbated by
immunomodulatory pharmacotherapy. The data
emphasize that oral mucosal inflammation in CKD is not
merely a consequence of poor hygiene but reflects
systemic immune and metabolic dysregulation. The
identification of elevated TNF-
α, IL
-
1β, and MMP
-1
levels offers a pathophysiological explanation for the
progression of mucosal lesions in this population.
Integrated dental protocols adapted to nephrological
comorbidity are essential to mitigate the risk of local
and systemic complications. Regular periodontal
screening, microbial control, cytokine monitoring, and
therapeutic
adjustment
in
collaboration
with
nephrology teams must become standard practice in
managing patients with CKD. Early dental intervention
may reduce systemic inflammation, improve transplant
outcomes, and enhance the overall quality of life in this
vulnerable patient group.
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