Publications by authors named "George Pelekos"

Aim: To evaluate the diagnostic accuracy of an active matrix metalloproteinase-8 (aMMP-8) point-of-care oral rinse test (POC-ORT) for predicting periodontitis in treatment-naïve subjects in two independent studies and update a recent meta-analysis.

Methods: The aMMP-8 POC-ORT index test was performed in a representative population in Hong Kong, China, and a consecutive convenience sample in Shanghai, China. The reference standard was the 2017 World Workshop classification of periodontal diseases.

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Aims: The aim of this scoping review was to map the available evidence on assessment tools for masticatory function for periodontitis patients. It also aimed to examine the methodology of masticatory function assessment and to identify the elements of subjective masticatory function evaluation for periodontitis patients reported in the literature.

Methods: A scoping review was conducted following the methodological guidance for the conduct of scoping reviews.

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Article Synopsis
  • Clinical guidelines recommend access flap surgery for deep periodontal pockets; however, papilla-preservation flap surgery (PPFS) and endoscopic-assisted subgingival debridement (EASD) offer minimally invasive treatment options.
  • A 12-month trial with 62 subjects compared the effectiveness of EASD and PPFS, focusing on clinical attachment levels (CAL) and secondary outcomes like pocket resolution and treatment time.
  • Results showed EASD provided similar CAL improvements and wound healing as PPFS but required less treatment time, indicating it is an effective alternative for managing periodontal issues.
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  • Orthodontic treatment of patients with periodontal issues includes challenges like managing inflammation, applying suitable force, and ensuring proper dental anchorage.
  • A case involving a 59-year-old woman with advanced periodontitis is discussed, showcasing the specific planning and use of orthodontic appliances to correct tooth migration.
  • The successful outcome emphasizes the need for teamwork among dental professionals and customized strategies in orthodontics for effective treatment in patients with serious periodontal conditions.
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Aim: To investigate the efficacy of alveolar ridge preservation (ARP) in periodontally compromised molar extraction sites.

Methods: An electronic search was performed on 10th November 2023 across five databases, seeking randomised/non-randomised controlled trials (RCTs/NCTs) that included a minimum follow-up duration of four months. The RoB2 and Robins-I tools assessed the risk of bias for the included studies.

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Aim: To develop a multiclass non-clinical screening tool for periodontal disease and assess its accuracy for differentiating periodontal health, gingivitis and different stages of periodontitis.

Materials And Methods: A cross-sectional diagnostic study on a convenience sample of 408 consecutive subjects was conducted by applying three non-clinical index tests estimating different features of the periodontal health-disease spectrum: a self-administered questionnaire, an oral rinse activated matrix metalloproteinase-8 (aMMP-8) point-of-care test (POCT) and determination of gingival bleeding on brushing (GBoB). Full-mouth periodontal examination was the reference standard.

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  • The shape of implant restorations plays a crucial role in both function and aesthetics, impacting peri-implant tissue health.
  • A study involving 122 subjects examined how the contour of single crown restorations influenced dental plaque accumulation, tissue inflammation, and probing depths.
  • Results showed that specific angles and profiles of the crown significantly correlated with plaque presence and inflammation, highlighting the need for careful planning in implant design to promote better tissue health.
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Purpose: To investigate survival rates and technical and biological complications of one-piece screw-retained hybrid abutments in implant-supported single crowns (SCs).

Study Selection: An electronic search was performed on five databases for clinical studies involving implant-supported single hybrid abutment crowns constructed using titanium-base (Ti base) abutments, with at least 12 months of follow-up. The RoB 2, Robins-I, and JBI tools were used to assess the risk of bias for the different study types.

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Objectives: The objectives were to clarify if intraoral ultrasonography (USG) is: (1) more accurate than conventional periodontal examinations in detection of furcation involvement, and (2) comparable to conventional periodontal examinations in accurate horizontal classification of furcation involvement in comparison to cone beam computed tomography (CBCT).

Methods: The buccal furcation in 61 lower first molars were evaluated with conventional periodontal examinations, intraoral USG and CBCT. The presence and classification of the horizontal depth of furcation involvement were defined clinically by assessment with a Nabers periodontal probe and a periapical radiograph with reference to the bone loss under the fornix.

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Article Synopsis
  • Oral health issues, like periodontal disease, are linked to broader systemic diseases, making their early prediction important for overall health.
  • A novel multimodal deep learning approach was developed that combines image data from panoramic radiographs with clinical information from EHR to predict systemic diseases.
  • The model showed strong accuracy in predicting various systemic diseases with AUC values reaching up to 0.92, suggesting that integrating oral health data can enhance disease prediction and healthcare decisions.
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Objectives: This systematic review and meta-analysis aim to evaluate the effect modifiers which may influence the periodontal healing of the adjacent second molar after lower third molar surgery.

Materials And Methods: Prospective studies including patients with third molars requiring removal, with at least 6 months follow-up were considered. Outcomes were periodontal probing depth (PPD) reduction, final PPD, clinical attachment level (CAL) change, final CAL, alveolar bone defect (ABD) reduction, and final ABD depth.

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Many experimental and clinical trials have investigated the dental application of probiotics, although the evidence concerning the effects of probiotic supplements is conflicting. We aimed to examine whether sponsorship in trials about dental applications of probiotics is associated with biased estimates of treatment effects. Overall, 13 meta-analyses involving 48 randomized controlled trials (23 with high risk of sponsorship bias, 25 with low risk) with continuous outcomes were included.

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  • L-PRF is an autologous blood-derived biomaterial that aids healing by releasing growth factors, cytokines, and MMPs, but its release profile is not well understood.
  • The study measured the release kinetics of these biomolecules at intervals of 6, 24, 72, and 168 hours, finding that growth factors decreased over time while cytokines showed an initial low release followed by a spike at 24 hours before decreasing again.
  • Results indicated that L-PRF can sustain the release of these healing agents for up to a week, enhancing the healing environment as local cells produce additional growth factors over time.
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Aim: Leucocyte- and platelet-rich fibrin (L-PRF) has been tested for enhancing alveolar ridge preservation (ARP), but little is known about the local release profile of growth factors (GF), and the clinical equipoise related to its efficacy remains. This study compared the patterns of GF release, early soft tissue healing, and alveolar ridge resorption following unassisted healing and L-PRF application in non-molar extraction sockets.

Materials And Methods: Atraumatic tooth extraction of two hopeless teeth per patient was followed by unassisted healing or L-PRF placement to fill the socket in 18 systemically healthy, non-smoking subjects.

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  • This study explores the link between periodontitis and systemic diseases in healthy individuals, revealing that almost all participants had at least one undiagnosed condition.
  • A significant number of subjects with periodontitis also had multiple abnormal test results, indicating a strong correlation between severe periodontal disease and systemic inflammation.
  • The findings highlight the importance of collaboration between oral and medical professionals to improve health awareness and outcomes for patients.
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This systematic review aimed to provide a synthesis of the evidence relating to how the provision of Vitamin D supplements influences oral health status. An electronic database search was performed across six databases using a standardised search strategy. The PICO framework was used to define the review question.

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  • The study focuses on identifying a straightforward screening method for Stage IV periodontitis after diagnosis, crucial for effective interdisciplinary management.
  • Masticatory function was assessed in 214 patients using both self-reported questionnaires and a chewing gum test, in conjunction with a full periodontal examination based on established classification standards.
  • Results showed that while self-reported measures had limited accuracy, the chewing gum test combined with factors like age and dietary changes provided strong predictive accuracy for Stage IV periodontitis, highlighting the potential for simpler diagnostic methods in clinical settings.
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Aim: To describe periodontal and functional characteristics of subjects diagnosed with different stages of periodontitis and to associate measures of masticatory function and quality of life with periodontitis stage.

Materials And Methods: This was a cross-sectional study on a convenience sample of 214 subjects with periodontitis seeking oral care in a hospital setting. They received a full-mouth intra-oral examination including dental and periodontal charting by a single calibrated examiner who also established the periodontitis stage diagnosis.

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Objective: This study investigated the nature of shared transcriptomic alterations in PBMs from periodontitis and atherosclerosis to unravel molecular mechanisms underpinning their association.

Methods: Gene expression data from PBMs from patients with periodontitis and those with atherosclerosis were each downloaded from the GEO database. Differentially expressed genes (DEGs) in periodontitis and atherosclerosis were identified through differential gene expression analysis.

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Background: This bioinformatics study aimed to reveal potential cross-talk genes, related pathways, and transcription factors between periimplantitis and rheumatoid arthritis (RA).

Methods: The datasets GSE33774 (seven periimplantitis and eight control samples) and GSE106090 (six periimplantitis and six control samples) were included from the National Center for Biotechnology Information (NCBI) Gene Expression Omnibus (GEO). A differential expression analysis ( < 0.

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Aim: To assess the accuracy of self-reported gingival bleeding on brushing (GBoB) for differentiating between periodontal health and disease and explore the optimal haemoglobin concentration that enables visual detection of GBoB.

Materials And Methods: Self-assessment of GBoB was conducted in supervised sessions for 408 consecutive adults. The haemoglobin levels in saliva/toothpaste slurry (TPS) were analysed, followed by a full-mouth periodontal examination.

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The mechanisms through which immunosuppressed patients bear increased risk and worse survival in oral squamous cell carcinoma (OSCC) are unclear. Here, we used deep learning to investigate the genetic mechanisms underlying immunosuppression in the survival of OSCC patients, especially from the aspect of various survival-related subtypes. OSCC samples data were obtained from The Cancer Genome Atlas (TCGA), International Cancer Genome Consortium (ICGC), and OSCC-related genetic datasets with survival data in the National Center for Biotechnology Information (NCBI).

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Background: The fixed tooth-implant connection remains a controversial issue. This private practice-based retrospective study aimed to evaluate the clinical outcomes of a contemporary fixed partial denture (FPD) design for connecting natural teeth and implants (TI-FPD), over an 11.8 years observation period.

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Article Synopsis
  • The study aimed to evaluate the effectiveness of an oral rinse test (aMMP-8) for distinguishing between different periodontal conditions, including health, gingivitis, and various stages of periodontitis.
  • Conducted on 408 adults, the test showed that while it could identify the presence of periodontitis, it struggled to differentiate between its various stages and other periodontal conditions; sensitivity was relatively low at 33.2%, but specificity was high at 93%.
  • When adjusting for factors like age and smoking, the test's performance improved, particularly for Stage IV periodontitis, suggesting it could be beneficial for screening if used alongside other tools and subject characteristics. Further research is recommended for validation.
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