Displaying publications 1 - 20 of 32 in total

Abstract:
Sort:
  1. Farook TH, Rashid F, Alam MK, Dudley J
    Clin Oral Investig, 2023 Feb;27(2):489-504.
    PMID: 36577849 DOI: 10.1007/s00784-022-04835-w
    BACKGROUND: To explore the digitisation of jaw movement trajectories through devices and discuss the physiological factors and device-dependent variables with their subsequent effects on the jaw movement analyses.

    METHODS: Based on predefined eligibility criteria, the search was conducted following PRISMA-P 2015 guidelines on MEDLINE, EBSCO Host, Scopus, PubMed, and Web of Science databases in 2022 by 2 reviewers. Articles then underwent Cochrane GRADE approach and JBI critical appraisal for certainty of evidence and bias evaluation.

    RESULTS: Thirty articles were included following eligibility screening. Both in vitro experiments (20%) and in vivo (80%) devices ranging from electronic axiography, electromyography, optoelectronic and ultrasonic, oral or extra-oral tracking, photogrammetry, sirognathography, digital pressure sensors, electrognathography, and computerised medical-image tracing were documented. 53.53% of the studies were rated below "moderate" certainty of evidence. Critical appraisal showed 80% case-control investigations failed to address confounding variables while 90% of the included non-randomised experimental studies failed to establish control reference.

    CONCLUSION: Mandibular and condylar growth, kinematic dysfunction of the neuromuscular system, shortened dental arches, previous orthodontic treatment, variations in habitual head posture, temporomandibular joint disorders, fricative phonetics, and to a limited extent parafunctional habits and unbalanced occlusal contact were identified confounding variables that shaped jaw movement trajectories but were not highly dependent on age, gender, or diet. Realistic variations in device accuracy were found between 50 and 330 µm across the digital systems with very low interrater reliability for motion tracing from photographs. Forensic and in vitro simulation devices could not accurately recreate variations in jaw motion and muscle contractions.

  2. Othman SA, Saffai L, Wan Hassan WN
    Clin Oral Investig, 2020 Aug;24(8):2853-2866.
    PMID: 31754872 DOI: 10.1007/s00784-019-03150-1
    OBJECTIVES: To validate the accuracy and reproducibility of linear measurements of three-dimensional (3D) images and to compare the measurements with the direct anthropometry method on cleft lip and palate (CLP) patients.

    MATERIALS AND METHODS: Nineteen linear facial measurements were derived from 16 standardized surface landmarks obtained from 37 cleft patients (20 males, 17 females; mean age 23.84 years, standard deviation ± 6.02). They were taken manually with calipers and were compared with the digitally calculated distance on the 3D images captured using the VECTRA-M5 360° Imaging System with pre-marked landmarks. Another pair of 19 linear measurements were computed on the 3D images 2 weeks apart for intra- and inter-observer agreements. Statistical analyses used were paired t test, the Bland-Altman analysis, and the intra-class correlation coefficient (ICC) index.

    RESULTS: Most of the linear measurements showed no statistically significant differences between the proposed method and direct anthropometry linear measurements. Nevertheless, bias of the 3D imaging system is present in the linear measurements of the nose width and the upper vermillion height. The measurements' mean biases were within 2 mm, but the 95% limit of agreement was more than 2 mm. Intra- and inter-observer measurements generally showed good reproducibility. Four inter-observer measurements, the upper and lower face heights, nose width, and pronasale to left alar base were clinically significant.

    CONCLUSIONS: Measurements obtained from this 3D imaging system are valid and reproducible for evaluating CLP patients.

    CLINICAL RELEVANCE: The system is suitable to be used in a clinical setting for cleft patients. However, training of the operator is strictly advisable.

  3. Nile CJ, Apatzidou DA, Awang RA, Riggio MP, Kinane DF, Lappin DF
    Clin Oral Investig, 2016 Dec;20(9):2529-2537.
    PMID: 26888221 DOI: 10.1007/s00784-016-1749-8
    OBJECTIVES: The serum IL-17A:IL-17E ratio has previously been demonstrated to be a clinical marker of periodontitis. The aim of this study was to determine the effects of non-surgical periodontal treatment on the serum IL-17A:IL-17E ratio.

    MATERIALS AND METHODS: Forty chronic periodontitis patients completed this study and received periodontal treatment comprising scaling and root planing plus ultrasonic debridement. Clinical data were recorded at baseline, 6 weeks (R1) after treatment completion (full-mouth or quadrant-scaling and root planing) and 25 weeks after baseline (R2). Serum samples were taken at each time point and cytokines concentrations determined by ELISA.

    RESULTS: Following treatment, statistically significant reductions were noted in clinical parameters. However, IL-17A and IL-17E concentrations were significantly greater than baseline values before- and after-adjusting for smoking. The IL-17A:IL-17E ratio was lower at R1 and R2. Serum IL-6 and TNF levels were significantly lower at R1 only. Also exclusively at R1, serum IL-17A and IL-17E correlated positively with clinical parameters, while the IL-17A:IL-17E ratio correlated negatively with probing pocket depth and clinical attachment.

    CONCLUSION: Increased serum IL-17E and a reduced IL-17A:IL-17E ratio may be indicative and/or a consequence of periodontal therapy. Therefore, the role of IL-17E in periodontal disease progression and the healing process is worthy of further investigation.

    CLINICAL RELEVANCE: IL-17E may be a valuable biomarker to monitor the healing process following periodontal treatment as increased IL-17E levels and a reduced IL-17A:IL-17E ratio could reflect clinical improvements post-therapy. Therefore, monitoring serum IL-17E might be useful to identify individuals who require additional periodontal treatment.

  4. Saharudin S, Sanusi SY, Ponnuraj KT
    Clin Oral Investig, 2022 Feb;26(2):1261-1268.
    PMID: 34453594 DOI: 10.1007/s00784-021-04098-x
    OBJECTIVE: The aim of this study is to do a sequencing analysis of RUNX2 in non-syndromic patients with supernumerary tooth.

    MATERIALS AND METHODS: Fifty-three patients with supernumerary tooth were identified retrospectively from 1,275 radiographic reviews who attended the Hospital Universiti Sains Malaysia (USM) Dental Clinic. Informed consent was obtained from the patients prior to the study. Blood samples were collected from 41 patients and DNA extractions were performed out of which 10 samples were chosen randomly for PCR amplification using designated primers for RUNX2 followed by DNA sequencing analysis.

    RESULTS: This study involved 28 male patients (68.3%) and 13 female patients (31.7%) with a gender ratio of 2.2:1 and mean age of 15.9 ± 6.2 years. DNA extraction yielded ~ 40 ng/μl of concentrated DNA, and each DNA sample had more than 1500 bp of DNA length. The purity ranged between 1.8 and 2.0. DNA sequencing analysis did not reveal any mutations in exons 5 and 6 of RUNX2.

    CONCLUSION: This study did not reveal any mutations in exons 5 and 6 of RUNX2 in non-syndromic patients with supernumerary tooth.

    CLINICAL RELEVANCE: Analysis of mutations in RUNX2 is important to enhance the understanding of tooth development in humans.

  5. Nazar NSBM, Ramanathan A, Ghani WMN, Rokhani FB, Jacob PS, Sabri NEB, et al.
    Clin Oral Investig, 2024 Jan 16;28(1):98.
    PMID: 38225483 DOI: 10.1007/s00784-023-05481-6
    OBJECTIVES: The aim of this systematic review and meta-analysis is to assess the diagnostic potential of salivary metabolomics in the detection of oral potentially malignant disorders (OPMDs) and oral cancer (OC).

    MATERIALS AND METHODS: A systematic review was performed in accordance with the 3rd edition of the Centre for Reviews and Dissemination (CRD) and Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement. Electronic searches for articles were carried out in the PubMed, Web of Science, and Scopus databases. The quality assessment of the included studies was evaluated using the Newcastle-Ottawa Quality Assessment Scale (NOS) and the new version of the QUADOMICS tool. Meta-analysis was conducted whenever possible. The effect size was presented using the Forest plot, whereas the presence of publication bias was examined through Begg's funnel plot.

    RESULTS: A total of nine studies were included in the systematic review. The metabolite profiling was heterogeneous across all the studies. The expression of several salivary metabolites was found to be significantly altered in OPMDs and OCs as compared to healthy controls. Meta-analysis was able to be conducted only for N-acetylglucosamine. There was no significant difference (SMD = 0.15; 95% CI - 0.25-0.56) in the level of N-acetylglucosamine between OPMDs, OC, and the control group.

    CONCLUSION: Evidence for N-acetylglucosamine as a salivary biomarker for oral cancer is lacking. Although several salivary metabolites show changes between healthy, OPMDs, and OC, their diagnostic potential cannot be assessed in this review due to a lack of data. Therefore, further high-quality studies with detailed analysis and reporting are required to establish the diagnostic potential of the salivary metabolites in OPMDs and OC.

    CLINICAL RELEVANCE: While some salivary metabolites exhibit significant changes in oral potentially malignant disorders (OPMDs) and oral cancer (OC) compared to healthy controls, the current evidence, especially for N-acetylglucosamine, is inadequate to confirm their reliability as diagnostic biomarkers. Additional high-quality studies are needed for a more conclusive assessment of salivary metabolites in oral disease diagnosis.

  6. Marimuthu D, Han KM, Mohamad MSF, Azman M
    Clin Oral Investig, 2021 May;25(5):3105-3115.
    PMID: 33175253 DOI: 10.1007/s00784-020-03634-5
    OBJECTIVES: Xerostomia is a prevalent sequelae among nasopharyngeal cancer (NPC) survivors; yet, effective treatment protocols have been elusive. This study was a prospective randomized clinical trial to compare the effects of saliva substitute mouthwash in nasopharyngeal cancer survivors with xerostomia, between two treatment arms, conducted in a tertiary center.

    MATERIALS AND METHODS: This study measured the effects within 4 weeks in relation to summated xerostomia inventory (SXI) and unstimulated whole saliva (UWS). Patients randomized into the interventional arm were prescribed an immunologically active saliva substitute (IASS), while patients in the control arm were prescribed a non-immunologically active mouthwash as placebo.

    RESULTS: The study population consisted of 94 patients. There was a significant difference in SXI difference (p < 0.0001) and UWS difference (p < 0.0001) between control and interventional arms. No harmful side effects associated with the use of either mouthwash encountered throughout the study duration.

    CONCLUSION: IASS mouthwash significantly reduces subjective xerostomia scores measured using SXI and improves objective measurement of salivary flow using UWS among nasopharyngeal cancer survivors with xerostomia.

    CLINICAL RELEVANCE: IASS is significantly more effective in improving subjective and objective xerostomia measurements compared to non-immunologically active mouthwash. Additionally, this treatment is very safe, with superior side effect profiles.

    TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04491435.

  7. Nagendrababu V, Narasimhan S, Faggion CM, Dharmarajan L, Jacob PS, Gopinath VK, et al.
    Clin Oral Investig, 2023 Jul;27(7):3437-3445.
    PMID: 36914841 DOI: 10.1007/s00784-023-04948-w
    OBJECTIVES: To evaluate the reporting quality of systematic reviews with network meta-analyses (NMAs) in Endodontics using the the Preferred Reporting Items for Systematic reviews and Meta-analyses (PRISMA) for NMA checklist.

    METHODS: The current investigation extends a recently published study in the International Endodontic Journal (Nagendrababu V, Faggion Jr CM, Pulikkotil SJ, Alatta A, Dummer PM Methodological assessment and overall confidence in the results of systematic reviews with network meta-analyses in Endodontics. International Endodontic Journal 2022;55:393-404) that assessed the methodological quality of systematic reviews with NMAs in Endodontics using the A MeaSurement Tool to Assess systematic Reviews (AMSTAR 2) tool. In the present study, the PRISMA for NMA checklist with 32 items was used to assess the reporting quality of the systematic reviews with NMAs (n = 12). Two independent assessors assigned '1' when an item was completely addressed, '0.5' when it was partially addressed, and '0' when it was not addressed. Disagreements were resolved through reviewer discussion until consensus was reached. If conflicts persisted, a third reviewer made the final decision. The PRISMA for NMA scores were shared with the relevant authors of the individual reviews to reduce the likelihood of misinterpretation and verify the scores assigned. The results for each individual item of the PRISMA-NMA items were calculated by summing the individual scores awarded; the maximum score for each item was 12.

    RESULTS: All the systematic reviews with NMAs adequately reported the following items: Title, Introduction section (Objectives), Methods section (Eligibility criteria and Information sources), Results section (Study selection, Study characteristics and Risk of bias within studies), and Discussion section (Summary of evidence). The items that were reported least often were the "geometry of the network" and "the summary of network geometry" with only 2 manuscripts (17%) including these items.

    CONCLUSION: A number of the items in the PRISMA-NMA checklist were adequately addressed in the NMAs; however, none adequately reported all the PRISMA-NMA items. The inadequacies of published NMAs that have been identified should be taken into consideration by authors of NMAs in Endodontics and by editors when managing the peer review process. In future, researchers who are writing systematic reviews with NMAs should comply with the PRISMA-NMA checklist.

    CLINICAL RELEVANCE: None of the included systematic reviews with NMA adequately reported all the PRISMA-NMA items. Inadequate reporting of a systematic review with NMA increases the possibility that it will provide invalid results. Therefore, authors should follow the PRISMA-NMA guidelines when reporting systematic reviews with NMA in Endodontics.

  8. Sawant S, Gokulan R, Dongre H, Vaidya M, Chaukar D, Prabhash K, et al.
    Clin Oral Investig, 2016 Jan;20(1):43-56.
    PMID: 25914047 DOI: 10.1007/s00784-015-1476-6
    In the present study, we have investigated the prognostic value of known stem cell-associated molecules such as Oct4, CD44 and c-Myc in patients with oral SCC who had received post-surgery radio- and/or chemotherapy.
  9. Al-Afifi N, Alabsi A, Kaid F, Bakri M, Ramanathan A
    Clin Oral Investig, 2019 May;23(5):2287-2301.
    PMID: 30291495 DOI: 10.1007/s00784-018-2685-6
    OBJECTIVES: In vivo study was performed to determine the chemopreventive efficacy of the DC resin methanol extract on a 4-nitroquinoline-1-oxide (4NQO) oral cancer animal model.

    MATERIALS AND METHODS: This study involves administration of 4NQO solution for 8 weeks alone (cancer induction) or with Dracaena cinnabari (DC) extract at 100, 500, and 1000 mg/kg. DC extract administration started 1 week before exposure until 1 week after the carcinogen exposure was stopped. All rats were sacrificed after 22 weeks, and histological analysis was performed to assess any incidence of pathological changes. Immunohistochemical expressions of selected tumor marker antibodies were analyzed using an image analyzer computer system, and the expression of selected genes involved in apoptosis and proliferative mechanism related to oral cancer were evaluated using RT2-PCR.

    RESULTS: The incidence of OSCC decreased with the administration of DC extract at 100, 500, and 1000 mg/kg compared to the induced cancer group. The developed tumor was also observed to be smaller when compared to the induced cancer group. The DC 1000 mg/kg group inhibits the expression of Cyclin D1, Ki-67, Bcl-2, and p53 proteins. It was observed that DC 1000 mg/kg induced apoptosis by upregulation of Bax and Casp3 genes and downregulation of Tp53, Bcl-2, Cox-2, Cyclin D1, and EGFR genes when compared to the induced cancer group.

    CONCLUSIONS: The data indicated that systemic administration of the DC resin methanol extract has anticarcinogenic potency on oral carcinogenesis.

    CLINICAL RELEVANCE: Chemoprevention with DC resin methanol extract may significantly reduce morbidity and possibly mortality from OSCC.

  10. Belayutham S, Wan Hassan WN, Razak FA, Mohd Tahir NNZ
    Clin Oral Investig, 2023 Jun;27(6):3245-3259.
    PMID: 36947263 DOI: 10.1007/s00784-023-04940-4
    OBJECTIVE: This single center parallel, randomized controlled trial aimed to determine the propensity of microbial adherence on vacuum-formed retainers (VFRs) with different surface roughness imprints.

    MATERIALS AND METHODS: Thirty-six patients debonded from fixed appliances at a teaching institution were allocated by block randomization stratified for gender to three groups [VFRs fabricated on conventional, fused deposition modeling (FDM) or stereolithography apparatus (SLA) working models]. Participants wore the VFRs for three months full-time followed by three months part-time. VFRs were collected after each follow-up for Streptococcus and yeast counts. Surface roughness was measured indirectly on the working models using a 3D optical surface texture analyzer. Blinding was not feasible due to appliance appearance. The trial was registered [NCT03844425 ( ClinicalTrials.gov )] and funded by the Universiti Malaya Dental Postgraduate Research Grant (DPRG/14/19).

    RESULTS: Thirty participants (eleven conventional, ten FDM, and nine SLA) were analyzed after six dropped out. No harms were reported. Microbial counts between the groups were not significantly different. There were more microbes in the lower VFRs than upper VFRs (total count: p<0.05; effect size, 0.5 during full-time wear and 0.4 during part-time wear). SLA had significantly (p<0.05) smoother surface than FDM (effect size, 0.3) and conventional models (effect size, 0.5). Microbial adherence was not associated with working model surface roughness.

    CONCLUSION: Microbial adherence on VFRs was not influenced by degree of surface roughness imprints from working models.

    CLINICAL RELEVANCE: 3D printed models can be used to make VFRs. Lower VFRs tended to accumulate oral microbes, potentially increasing the oral health risk in the lower arch.

  11. Kamal A, Salman B, Ar NH, Samsudin AR
    Clin Oral Investig, 2021 Mar;25(3):1029-1033.
    PMID: 32562076 DOI: 10.1007/s00784-020-03393-3
    OBJECTIVE: The aim of this study is to investigate the efficacy of delivering low-level laser therapy (LLLT) in the management of dry socket at University Dental Hospital Sharjah.

    MATERIALS AND METHOD: Forty-five patients with dry socket were divided into two treatment groups. Group I dry socket patients (n = 30) received conventional treatment while group II patients (n = 15) were irradiated with LLLT at a setting of 200-mW, 6-J, continuous-wave mode using an R02 tipless handpiece (Fotona Er:YAG, Europe), on the buccal, lingual, and middle surfaces of the socket for 30 s from a delivery distance of 1 cm. Pain score and quantification of granulation tissue in the socket were recorded at 0, 4, and 7 days post-dry socket treatment.

    RESULTS: Results showed that the LLLT-irradiated group II sockets showed a much lower VAS pain score of 1-2 as early as day 4, and a richer amount of granulation tissue compared to the conventional treated group I socket. The amount and rate of granulation tissue formation in the dry socket are inversely proportional to the pain score showing significant clinical effectiveness of LLLT on promoting the healing of the dry socket, with improvement in symptoms (P = .001). Conventionally treated dry sockets take at least 7 days to match the effective healing of an LLLT-irradiated dry socket.

    CONCLUSION: LLLT irradiation influences biomodulation of dry socket healing by dampening inflammation, promoting vascularization, stimulating granulation, and controlling pain symptoms.

    CLINICAL RELEVANCE: LLLT may be an additional effective tool for managing dry sockets in general dental practice.

  12. Lee YH, Baharuddin NA, Chan SW, Rahman MT, Bartold PM, Sockalingam S, et al.
    Clin Oral Investig, 2021 Mar;25(3):1441-1450.
    PMID: 32656595 DOI: 10.1007/s00784-020-03452-9
    OBJECTIVES: It has been proposed that citrullination and carbamylation occur in the inflamed periodontium and could be the plausible mechanisms for the generation of antigens involved in the development and progression of RA. The purpose of this study was to determine the presence and location of citrullinated and carbamylated proteins in the gingival tissues and compare their abundance in periodontitis (PD) patients with or without RA.

    MATERIALS AND METHODS: Gingival tissue samples of healthy (n = 5), PD with RA (n = 5) and PD without RA (n = 5) were collected. Specimens were formalin fixed, paraffin embedded and sectioned at 4 μm. The tissue sections were analysed for the presence of citrullinated and carbamylated proteins by immunohistochemistry. Semi-quantitative analysis was performed to quantify and compare the protein abundance between groups.

    RESULTS: The number of cells containing citrullinated and carbamylated proteins with higher intensity was markedly increased in gingival tissues from PD with or without RA in comparison with healthy controls.

    CONCLUSION: Inflamed gingival tissue is a potential source of citrullinated and carbamylated proteins other than synovial tissues. The extent to which the local accumulation of these proteins contributes to the pathogenesis of RA needs further elucidation.

    CLINICAL RELEVANCE: If PD is a potential source of post-translationally modified proteins, untreated PD should not be taken lightly in the context of RA. Hence, addressing gingival inflammation should be viewed as an important preventive measure in the general population not only for the progression of periodontal disease but also reducing the risk of developing extra-oral comorbidities.

  13. Varadan M, Gopalkrishna P, Bhat PV, Kamath SU, S K, K TG, et al.
    Clin Oral Investig, 2019 Aug;23(8):3249-3255.
    PMID: 30430337 DOI: 10.1007/s00784-018-2741-2
    OBJECTIVES: Periodontal disease and polycystic ovary syndrome (PCOS) share risk factors like obesity, insulin resistance, and dyslipidemia, along with evidence of chronic inflammation in the two conditions. Evaluating the influence of PCOS on periodontal health would, therefore, identify a possible association.

    MATERIALS AND METHODS: Sixty women, divided into equal groups of PCOS and healthy patients, were clinically examined for periodontal parameters like probing depth (PD), plaque index (PI), modified gingival index (mGI), and bleeding on probing (BOP). Fasting blood sugar (FBS), insulin (FI), triglycerides (TG), and free testosterone along with serum and gingival crevicular fluid (GCF) levels of malondialdehyde (MDA) and myeloperoxidase (MPO) were the biochemical parameters evaluated.

    RESULTS: Women with PCOS had statistically significant differences in mGI, PI, testosterone, FBS, and TG when compared with healthy women (p 

  14. Ahmed HMA, El-Karim I, Duncan HF, Krastl G, Galler K
    Clin Oral Investig, 2023 Nov;27(11):6357-6369.
    PMID: 37870593 DOI: 10.1007/s00784-023-05284-9
    OBJECTIVES: This review aims to discuss the implications of anatomy of the root, pulp chamber, and canals on pulpotomy and revitalization procedures (RPs) as treatment alternatives to root canal treatment procedures.

    METHODS: This narrative review was undertaken to address two main questions - why remove vital pulp tissue in teeth with complex canal anatomy when it can be preserved? And why replace the necrotic pulp in teeth with mature roots with a synthetic material when we can revitalize? This review also aims to discuss anatomical challenges with pulpotomy and revitalization procedures.

    RESULTS: Maintaining the vitality of the pulp via partial or full pulpotomy procedures avoids the multiple potential challenges faced by clinicians during root canal treatment. However, carrying out pulpotomy procedures requires a meticulous understanding of the pulp chamber anatomy, which varies from tooth to tooth. Literature shows an increased interest in the application of RPs in teeth with mature roots; however, to date, the relation between the complexity of the root canal system and outcomes of RPs in necrotic multi-rooted teeth with mature roots is unclear and requires further robust comparative research and long-term follow-up.

    CONCLUSIONS: Whenever indicated, pulpotomy procedures are viable treatment options for vital teeth with mature roots; however, comparative, adequately powered studies with long-term follow-up are needed as a priority in this area. RPs show promising outcomes for necrotic teeth with mature roots that warrant more evidence in different tooth types with long-term follow-ups.  CLINICAL RELEVANCE: Clinicians should be aware of the pulp chamber anatomy, which is subject to morphological changes by age or as a defensive mechanism against microbial irritation, before practicing partial and full pulpotomy procedures. RP is a promising treatment option for teeth with immature roots, but more evidence is needed for its applications in teeth with mature roots. A universal consensus and considerably more robust evidence are needed for the standardization of RPs in teeth with mature roots.

  15. Mohd Nor NH, Berahim Z, Azlina A, Kannan TP
    Clin Oral Investig, 2019 Nov;23(11):3959-3966.
    PMID: 30847574 DOI: 10.1007/s00784-019-02827-x
    OBJECTIVES: This study aimed to differentiate and characterize fibroblast-like cells from stem cells from human exfoliated deciduous teeth (SHED).

    MATERIALS AND METHODS: The differentiation of fibroblast-like cells from SHED was carried out by using specific human recombinant connective tissue growth factor (CTGF). To characterize fibroblastic differentiation, the induced cells were subjected to morphological changes, proliferation rate, gene expression analysis using quantitative reverse transcription-polymerase chain reaction (qRT-PCR), flow cytometry, and immunofluorescence staining. The commercial primary human gingival fibroblasts served as positive control in this study.

    RESULTS: The results from characterization analysis were compared with that of commercial cells to ensure that the cells differentiated from SHED were fibroblast-like cells. The results showed the inductive effect of CTGF for fibroblastic differentiation in SHED. SHED-derived fibroblasts were successfully characterized despite having similar morphological appearance, i.e., (i) significant proliferation rate between fibroblast-like cells and SHED, (ii) high expression of fibroblast-associated markers in qRT-PCR analysis, and (iii) positive staining against collagen type 1, fibroblast-specific protein 1, and human thymic fibroblasts in flow cytometry analysis and immunofluorescence staining. The same expression patterns were found in primary human gingival fibroblasts, respectively. SHED as negative control showed lower expression or no signal, thus confirming the cells differentiated from SHED were fibroblast-like cells.

    CONCLUSIONS: Taken together, the protocol adopted in this study suggests CTGF to be an appropriate inducer in the differentiation of SHED into fibroblast-like cells.

    CLINICAL RELEVANCE: The fibroblast-like cells differentiated from SHED could be used in future in vitro and in vivo dental tissue regeneration studies as well as in clinical applications where these cells are needed.

  16. Jayaraman P, Govindasamy V, Gnanasegaran N, Kunasekaran W, Vasanthan P, Musa S, et al.
    Clin Oral Investig, 2016 Jan;20(1):109-16.
    PMID: 26048030 DOI: 10.1007/s00784-015-1497-1
    Long-term culture system is used to prevent the impediment of insufficient cells and is good for low starting materials such as dental pulp or periodontal ligament. In general, although cell viability and functionality are the most common aspects taken into consideration in culturing cells for a long term, they may not truly represent the biological state of the cells. Hence, we explored the behaviour of another important aspect which is the immune properties in long-term cultured cells.
  17. Akram Z, Safii SH, Vaithilingam RD, Baharuddin NA, Javed F, Vohra F
    Clin Oral Investig, 2016 Jun;20(5):903-14.
    PMID: 27005812 DOI: 10.1007/s00784-016-1793-4
    OBJECTIVE: There is a controversy over the influence of obesity on the periodontal treatment outcome in patients with chronic periodontitis (CP). The aim of the present systematic review was to evaluate the efficacy of non-surgical periodontal therapy (NSPT) in the management of CP among obese and non-obese patients.
    MATERIALS AND METHODS: The addressed focused question was "What is the efficacy, of NSPT with respect to clinical, radiographic, biochemical, microbiological, and patient-centered outcomes in obese as compared to non-obese chronic periodontitis patients?" Databases were searched from 1977 up to and including December 2014 using relevant key indexing terms. Unpublished data, experimental studies, letters to the editor, review articles, case reports, and commentaries were excluded. Meta-analysis of three studies was performed.
    RESULTS: Five clinical studies were included. The total number of patients ranged between 30 and 260 individuals. The mean age of patients was between 42.5 and 48.8 years. In three studies, the clinical periodontal parameters (plaque index (PI), gingival bleeding index (GBI), periodontal pocket depth (PPD), and clinical attachment loss (CAL)) in obese and non-obese patients following NSPT was comparable. Meta-analysis of PPD and CAL among obese and non-obese subjects showed comparable outcomes (PPD P = 0.91, I (2) 67.36 %; CAL P = 0.87, I (2) 77.16 %). However, in three studies, NSPT resulted in a significantly better clinical periodontal outcome among non-obese subjects than obese subjects. The difference in the levels of serum pro-inflammatory cytokine levels (IL-1β, IL-6, TNF-α, IFN-γ, leptin, adiponectin, and CRP) among obese and non-obese patients following treatment for CP was inconsistent.
    CONCLUSION: It remains unclear whether NSPT has a significantly higher impact on the clinical periodontal outcomes in obese patients than in non-obese patients with chronic periodontitis, given that the number of selected studies was relatively low and the reported findings were inconsistent.
    CLINICAL RELEVANCE: Although the effect of obesity on the outcome of NSPT still remains unclear, nevertheless clinicians are prompted to manage obesity prior to and during periodontal treatment.
    KEYWORDS: Cytokines; Inflammatory markers; Obese; Overweight; Periodontal therapy; Periodontitis
  18. Nagendrababu V, Jayaraman J, Suresh A, Kalyanasundaram S, Neelakantan P
    Clin Oral Investig, 2018 Mar;22(2):655-670.
    PMID: 29372445 DOI: 10.1007/s00784-018-2345-x
    OBJECTIVES: Reduction of microbial load from the root canal systems is a pre-requisite for healing of lesions of endodontic origin. Such microbial reduction is influenced by the method of irrigant delivery and activation. The aim of this systematic review was to compare the effect of ultrasonically activated irrigation (UAI) with other irrigation techniques on the reduction of microorganisms during root canal disinfection.

    MATERIALS AND METHODS: The research question was created based on the PICO strategy. Two reviewers independently performed a comprehensive literature search in electronic databases. Following application of inclusion and exclusion criteria to the selected articles, a systematic data extraction sheet was constructed. The selected articles were assessed using methodological quality scoring protocol. The risk of bias in selected studies was critically assessed by two reviewers.

    RESULTS: A total of 15 articles were included for the systematic review. The included studies were heterogeneous in study design; hence, meta-analysis was not performed. The overall risk of bias for the selected studies was moderate. Overall, UAI showed superior reduction of microbial counts, resulting in better disinfection compared to other irrigation systems chosen for comparison in this review.

    CONCLUSION: The use of UAI can bring about superior microbial reduction within the root canal system compared to other irrigant activation techniques.

    CLINICAL RELEVANCE: Activation of irrigants with ultrasonic brings about significant bacterial reduction from the root canal systems compared to other methods of irrigant activation and conventional syringe irrigation. This might help in improving the outcome of root canal treatment.

  19. Daood U, Burrow MF, Yiu CKY
    Clin Oral Investig, 2020 Feb;24(2):649-661.
    PMID: 31115692 DOI: 10.1007/s00784-019-02928-7
    OBJECTIVE: Evaluate effect of quaternary ammonium silane (QAS) cavity disinfectant on cariogenic biofilm.

    MATERIALS AND METHODS: Single- (Streptococcus mutans or Lactobacillus acidophilus), dual- (Streptococcus mutans/Lactobacillus Acidophilus), and multi-species (Streptococcus mutans, Actinomyces naeslundii, and Streptococcus sanguis) biofilms were grown on acid-etched dentine discs. Biofilms were incubated (120 min/37 °C) and allowed to grow for 3 days anaerobically. Discs (no treatment) served as control (group 1). Groups II, III, IV, and V were then treated with 2% chlorhexidine, and 2%, 5%, and 10% QAS (20 s). Discs were returned to well plates with 300 μL of bacterial suspension and placed in anaerobic incubator at 37 °C and biofilms redeveloped for 4 days. Confocal microscopy, Raman, CFU, and MTT assay were performed.

    RESULTS: Raman peaks show shifts at 1450 cm-1, 1453 cm-1, 1457 cm-1, 1460 cm-1, and 1462 cm-1 for control, 2% CHX, 2%, 5%, and 10% QAS groups in multi-species biofilms. There was reduction of 484 cm-1 band in 10% QAS group. CLSM revealed densely clustered green colonies in control group and red confluent QAS-treated biofilms with significantly lower log CFU for single/dual species. Metabolic activities of Streptococcus mutans and Lactobacillus acidophilus decreased with increasing QAS exposure time.

    CONCLUSION: Quaternary ammonium silanes possess antimicrobial activities and inhibit growth of cariogenic biofilms.

    CLINICAL SIGNIFICANCE: Available data demonstrated use of QAS as potential antibacterial cavity disinfectant in adhesive dentistry. Experimental QAS can effectively eliminate caries-forming bacteria, when used inside a prepared cavity, and can definitely overcome problems associated with present available cavity disinfectants.

  20. Salahshourifar I, Vincent-Chong VK, Chang HY, Ser HL, Ramanathan A, Kallarakkal TG, et al.
    Clin Oral Investig, 2015 Dec;19(9):2273-83.
    PMID: 25846277 DOI: 10.1007/s00784-015-1467-7
    OBJECTIVES: This study includes the direct sequencing of cornulin (CRNN) gene to elucidate the possible mechanism of CRNN downregulation and explore the genetic imbalances at 1q21.3 across oral squamous cell carcinoma (OSCC) samples.

    MATERIALS AND METHODS: In mutation screening of CRNN gene, gDNA from OSCC tissues were extracted, amplified, and followed by direct sequencing. OSCC samples were also subjected to fragment analysis on CRNN gene to investigate its microsatellite instability (MSI) and loss of heterozygosity (LOH). Immunohistochemistry was performed to validate CRNN downregulation in OSCC samples.

    RESULTS: No pathogenic mutation was found in CRNN gene, while high frequency of allelic imbalances was found at 1q21.3 region. MSI was found more frequent (25.3 %) than LOH (9.3 %). Approximately 22.6 % of cases had high MSI which reflects higher probability of inactivation of DNA mismatch repair genes. MSI showed significant association with no betel quid chewing (p = 0.003) and tongue subsite (p = 0.026). LOH was associated with ethnicity (p = 0.008) and advanced staging (p = 0.039). The LOH at 1q21.3 was identified to be as an independent prognostic marker in OSCC (HRR = 7.15 (95 % CI, 1.41-36.25), p = 0.018). Downregulation of CRNN was found among MSI-positive OSCCs and was associated with poor prognosis (p = 0.044).

    CONCLUSION: This study showed a significant correlation between LOH/MSI at 1q21.3 with clinical outcomes and that downregulation of CRNN gene could be considered as a prognostic marker of OSCC.

    CLINICAL RELEVANCE: Insights of the downregulation mode of CRNN gene lays the basis of drug development on this gene as well as revealing its prognostic value.

Related Terms
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links