Multifactorial analysis of factors influencing premolar mobility in stage III/IV grade C periodontitis patients ≤ 35 years of age: a cross-sectional study.

Background: Previous studies have suggested a potential link between the crown-to-root ratio (CRR) and root morphology in patients with mild chronic periodontitis, which may be associated with tooth mobility. However, these findings have not been thoroughly investigated. Our previous study found that 76% of patients with aggressive periodontitis, particularly those with premolar involvement, exhibited abnormal root morphology, severe alveolar bone loss, and increased tooth mobility, leading to poor clinical outcomes.

Comparison of the inflammatory states of serum and gingival crevicular fluid in periodontitis patients with or without type 2 diabetes mellitus.

Unlabelled: There is a two-way relationship between periodontitis and type 2 diabetes mellitus. This study aimed to compare the inflammatory states in serum and gingival crevicular fluid (GCF) in periodontitis patients with or without type 2 diabetes mellitus (T2DM) and healthy subjects.

Materials And Methods: 20 subjects were systematic and periodontal healthy (H group), 40 subjects were with periodontitis (CP group), and other 40 were with periodontitis and type 2 diabetes mellitus (DC group).

Multilevel Analysis of Non-surgical Periodontal Treatment of Patients with Generalised Aggressive Periodontitis.

Objective: To investigate various factors affecting the clinical outcome of nonsurgical periodontal treatment and evaluate the treatment effects of adjunctive amoxicillin and metronidazole (AMX + MET) in patients with generalised aggressive periodontitis (GAgP).

Methods: Forty-two patients with GAgP were recruited and randomly assigned to three groups: scaling and root planing (SRP) only, AMX + MET after SRP, and AMX + MET during SRP. The patients were assessed every 2 months post-therapy.

Influence of local anesthesia on the outcomes of non-surgical periodontal treatment.

Background: There is limited evidence of the effects of local anesthesia (LA) on outcomes of non-surgical periodontal treatment (NSPT), in particular among the Chinese. This retrospective cohort study aimed to evaluate the effects of LA on short-term treatment outcomes of NSPT and to determine under what circumstances LA should be prescribed to improve these outcomes.

Methods: Data from periodontal examinations of 3980 patients were used.

Evaluation of Periodontal Status after Orthodontic Treatment: A Pilot Study on Patients with Stage IV/Grade C periodontitis.

Objective: To evaluate whether the periodontal status was affected in patients with stage IV/grade C periodontitis after orthodontic treatment.

Methods: Twenty-four patients with stage IV/grade C periodontitis who received combined periodontal and orthodontic treatment were included in this study. Probing depth (PD), bleeding on probing (BOP) and percentage of relative bone height (RBH%) were measured and calculated.

Clinical performance of non-surgical periodontal therapy in a large Chinese population with generalized aggressive periodontitis.

Aim: This study aimed to evaluate clinical performance of non-surgical periodontal treatment (NSPT) and its influential factors in a large Chinese population with generalized aggressive periodontitis (GAgP).

Material And Methods: Longitudinal periodontal examination data of 1,004 GAgP patients (numbers of patients with observation periods 6 weeks~, 3 months~, 6 months~, 1 year~, 3 years~ and >5 years were 203, 310, 193, 205, 70 and 23, respectively) were extracted from a hospital-based electronic periodontal charting record system and analysed by multilevel analysis.

Results: Mean probing depth (PD) and attachment loss (AL) reductions at patient level were 1.

Discrepancy of Clinical Parameters between the First and Second Molars Can Help to Differentiate Subjects with Aggressive Periodontitis from Chronic Periodontitis: a Cross-sectional Study Based on a Large Chinese Population.

Objective: To explore associations between mean discrepancy values for the first and second molars (MDVFSs) and generalised aggressive periodontitis (GAgP) using hospital-based periodontal examination records from a large Chinese population.

Methods: Data from consecutive patients diagnosed as having chronic periodontitis (CP, n = 51,849) and GAgP (n = 2,706) were included. Patient ages, gender, smoking status, mean full-mouth probing depth (PD), and mean full-mouth attachment loss (AL), as well as MDVFSs for PD and AL, were extracted.

Effectiveness of non-surgical periodontal therapy in a large Chinese population with chronic periodontitis.

Aim: The aim of this study was to evaluate the effectiveness of non-surgical periodontal treatment (NSPT) and its influential factors in a large Chinese population with chronic periodontitis.

Methods: Periodontal examination data of 10,789 patients with at least one periodontal re-evaluation record were extracted from a hospital-based electronic periodontal charting record system. Probing depth (PD) and bleeding index (BI) reductions after NSPT and their influential factors were analysed by multilevel analysis.

[Association between FADS1 rs174537 polymorphism and serum proteins in patients with aggressive periodontitis].

Objective: To investigate the potential association between FADS1 rs174537 polymorphism and serum proteins in patients with aggressive periodontitis, which may provide benefits for diagnosis and treatment of aggressive periodontitis.

Methods: A total of 353 patients with aggressive periodontitis (group AgP) and 125 matched controls (group HP) were recruited in the study. Genotyping of FADS1 rs174537 and serum biochemical indexes were tested at the study's start.

The Effects of Initial Periodontal Therapy on the Serum Receptor Activator of Nuclear Factor-κβ Ligand/Osteoprotegerin System in Patients With Type 2 Diabetes Mellitus and Periodontitis.

Background: The aim of the present study is to evaluate the serum receptor activator of nuclear factor-κβ ligand (RANKL)/osteoprotegerin (OPG) system in patients with chronic periodontitis (CP) and type 2 diabetes mellitus (T2DM) and its changes after periodontal intervention.

Methods: Thirty-five patients with CP + T2DM, 35 systemically healthy patients with CP, and 35 healthy controls were enrolled, and serum levels of RANKL and OPG were measured at baseline. Then the CP + T2DM group was divided into a well-controlled subgroup and a poorly controlled subgroup according to their hemoglobin A1c (HbA1c), and initial periodontal therapy was performed.

[Analysis of serum IgG titers to Aggregatibacter actinomycetemcomitans serotype c in aggressive periodontitis patients].

Objective: To analyze the serum IgG titers to Aggregatibacter actinomycetemcomitans(Aa) and associated factors in patients with aggressive periodontitis (AgP).

Methods: Venous blood samples were collected from 62 AgP patients and 45 periodontal healthy controls, unstimulated whole saliva and pooled subgingival plaque samples of AgP patients were also collected for the detection of Aa (PCR method). Serum IgG titers to Aa serotype c were measured by enzyme-linked immunosorbnent assay (ELISA).

[Relationship between vitamin D receptor gene polymorphisms and chronic periodontitis].

Objective: To investigate the relationship between vitamin D receptor (VDR) gene polymorphisms and chronic periodontitis(CP).

Methods: Buccal swabs from 105 patients with mild/mode-rate CP and 85 severe CP were collected, DNA was extracted from these buccal swabs using the TIANamp Swab DNA Kit [TIANGEN Biotech (Beijing) CO.Ltd].

[Determination of bone metabolic marker levels in perio-implant crevicular fluid and analysis of dental implants stability by resonance frequency in the early stage of healing].

Objective: To investigate the changes of osteoprotegerin (OPG) and receptor activator of nuclear factor kappa B ligand (RANKL) level in perio-implant crevicular fluid (PICF) and to monitor the development of the stability of Straumann® tissue-level implants by resonance frequency analysis (RFA) during the early phases of healing.

Methods: A total of 35 implants (length 10 mm) were placed. PICF samples were collected with filter paper strips at baseline, 1, 2, 3, 4, 6, 8, and 12 weeks post-surgery, respectively.

[Clinical and putative periodontal pathogens' features of different sites with probing depth reduction after non-surgical periodontal treatment of patients with aggressive periodontitis].

Objective: To evaluate the differences of clinical parameters and putative periodontal pathogens in sites of different probing depth (PD) reduction after non-surgical periodontal treatment in patients with aggressive periodontitis (AgP).

Methods: Clinical examinations including plaque index, probing depth (PD), attachment level (AL) and bleeding index (BI), and full-mouth periapical photographs were collected from 20 patients with AgP. All the patients received non-surgical periodontal treatment, including oral hygiene instruction, supra-gingival scaling, subgingival scaling and root planing (SRP) and were followed up for 6 months post-therapy.

Association between plasma leptin level and systemic inflammatory markers in patients with aggressive periodontitis.

Background: Increasing evidence supports an association between periodontitis and systemic diseases. Leptin is involved both in the energy metabolism and inflammatory processes and is suggested to be a link between periodontal infection and systemic health. The present study aimed to evaluate the peripheral leptin concentration in patients with aggressive periodontitis (AgP) and to explore the relationship between leptin and systemic inflammation.

[Isolation, culture and ultrastructure analysis of mesenchymal stem cells from human periodontal ligament].

Objective: To isolate and culture human periodontal ligament stem cells (PDLSCs) and observe its ultrastructure.

Methods: The proliferation and growth characteristics of human periodontal ligament cells were observed in primary culture and colony culture. PDLSCs were isolated by magnetic activated cell sorting (MACS) and ultrastructural characterization was observed by electron microscopy.

[Characteristic of sample banks isolated from EDTA-blood by sedimentation method].

Objective: To assess the characteristics of establishing the different sample banks of plasma, leukocytes and DNA by sedimentation method of isolating from ethylene diamine tetraacetic acid(EDTA)-blood and to clarify the sedimentation method of leukocyte isolation and plasma volume by comparative data and recommended procedures for applicability.

Methods: In the study, 29 EDTA-bloods were obtained, the total amounts of leukocytes and the percentage of neutrophile granulocytes, and lymphocytes in the EDTA-blood detected as a control group and then assigned equally into 4 EP tubes with 1 mL EDTA-blood per tube as 4 test groups, then the 4 tubes were placed with the EDTA-blood at room temperature and the plasma layers were isolated at 0.5, 1, 2 and 3 h, receptively.

[Alveolar bone loss in nuclear families of aggressive periodontitis and the heredity of root shape].

Objective: To evaluate the status of residual alveolar bone in aggressive periodontitis (AgP) nuclear families and to investigate the influence of teeth with root abnormity on residual alveolar bone and the heredity of root abnormity, the premolar cone-root and proportion of crown and root.

Methods: Nineteen AgP probands (9 males and 10 females) at average age of 24.5 and 38 parents at average age 51.

[The accuracy of probing depth measurements of undergraduate students and associated factors analysis].

Objective: To investigate the accuracy of probing depth measurements of undergraduate students in department of periodontology and analyze the cause of measurement errors.

Methods: Thirty-eight dental students from Peking Universty School and Hospital of Stomatology who began their periodontal clinical practice for the first time were recruited. According to principle of clinical teaching, after the students recorded the probing depth of 1-2 periodontitis patients using Williams periodontol probe, an experienced teacher checked the probing depth.

[Long-term clinical and hematologic effects of non-surgical treatment on aggressive periodontitis].

Objective: To investigate the long-term effects of non-surgical treatment on clinical and hematologic states of patients with generalized aggressive periodontitis (GAgP).

Methods: Patients with GAgP (n = 25) and healthy controls (n = 28) were recruited. The clinical parameters, including probing depth (PD), bleeding index (BI), attachment loss (AL) were examined and recorded.

[Predictive model for post-treatment tooth loss of patients with aggressive periodontitis].

Objective: To establish a predictive model for long-term tooth loss of patients with aggressive periodontitis (AgP) after periodontal treatment.

Methods: Patients diagnosed as AgP in Department of Periodontology, Peking University School and Hospital of Stomatology, who were re-evaluated 3 to 11 years after periodontal treatment were enrolled (n=85). Logistic regression was performed to select background, periodontal and radiographic factors which were related to long-term post-treatment tooth loss.