1
|
Mai HN, Ngo HC, Cho SH, Lee DH. Automated scoring and augmented reality visualization software program for evaluating tooth preparations. J Prosthet Dent 2024:S0022-3913(24)00124-0. [PMID: 38490936 DOI: 10.1016/j.prosdent.2024.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 03/17/2024]
Abstract
STATEMENT OF PROBLEM Tooth preparation is an essential part of prosthetic dentistry; however, traditional evaluation methods involve subjective visual inspection that is prone to examiner variability. PURPOSE The purpose of this study was to investigate a newly developed automated scoring and augmented reality (ASAR) visualization software program for evaluating tooth preparations. MATERIAL AND METHODS A total of 122 tooth models (61 anterior and 61 posterior teeth) prepared by dental students were evaluated by using visual assessments that were conducted by students and an expert, and auto assessment that was performed with an ASAR software program by using a 3-dimensional (3D) point-cloud comparison method. The software program offered comprehensive functions, including generating detailed reports for individual test models, producing a simultaneous summary score report for all tested models, creating 3D color-coded deviation maps, and forming augmented reality quick-response (AR-QR) codes for online data storage with AR visualization. The reliability and efficiency of the evaluation methods were measured by comparing tooth preparation assessment scores and evaluation time. The data underwent statistical analysis using the Kruskal-Wallis test, followed by Mann-Whitney U tests for pairwise comparisons adjusted with the Benjamini-Hochberg method (α=.05). RESULTS Significant differences were found across the evaluation methods and tooth types in terms of preparation scores and evaluation time (P<.001). A significant difference was observed between the auto- and student self-assessment methods (P<.001) in scoring both the anterior and posterior tooth preparations. However, no significant difference was found between the auto- and expert-assessment methods for the anterior (P=.085) or posterior (P=.14) tooth preparation scores. Notably, the auto-assessment method required significantly shorter time than the expert- and self-assessment methods (P<.001) for both tooth types. Additionally, significant differences in evaluation time between the anterior and posterior tooth were observed in both self- and expert-assessment methods (P<.001), whereas the evaluation times for both the tooth types with the auto-assessment method were statistically similar (P=.32). CONCLUSIONS ASAR-based evaluation is comparable with expert-assessment while exhibiting significantly higher time efficiency. Moreover, AR-QR codes enhance learning and training experiences by facilitating online data storage and AR visualization.
Collapse
Affiliation(s)
- Hang-Nga Mai
- Research Professor, Institute for Translational Research in Dentistry, Kyungpook National University, Daegu, Republic of Korea; and Lecturer, Dental School, Hanoi University of Business and Technology, Hanoi, Vietnam
| | - Hien Chi Ngo
- Professor, UWA Dental School, University of Western Australia, Perth, Australia
| | - Seok-Hwan Cho
- Associate Professor and Chairman of Prosthodontic Department, University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa
| | - Du-Hyeong Lee
- Professor, Department of Prosthodontics, School of Dentistry, Institute for Translational Research in Dentistry, Kyungpook National University, Daegu, Republic of Korea.
| |
Collapse
|
2
|
Mai HN, Ngo HC, Cho SH, Duong CP, Mai HY, Lee DH. Effectiveness of virtual reality interactive simulation practice in prosthodontic education: A systematic review and meta-analysis. Eur J Dent Educ 2024. [PMID: 38433575 DOI: 10.1111/eje.12997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 02/04/2024] [Indexed: 03/05/2024]
Abstract
INTRODUCTION Virtual reality-based interactive simulation (VRIS) provides a safe and controlled environment for dental students and professionals to develop skills and knowledge. This study aimed to investigate the effectiveness of using the VRIS for prosthodontic practice and to explore the trends, application areas, and users' attitudes towards VRIS. MATERIALS AND METHODS This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for searching studies published until 21 March 2023 that reported quantitative or qualitative learning outcomes related to the use of VRIS for dental prosthodontic practice and clinical training. The quality of the included studies was assessed using the Medical Education Research Study Quality Instrument (MERSQI) and Newcastle-Ottawa Scale-Education (NOS-E) tools. A random-effects meta-analysis was conducted to compare the intervention group (utilizing VRIS) and the control group (employing conventional prosthodontic training methods) based on performance skill scores and task completion time, with a significance level set at <.05. RESULTS The meta-analysis revealed that the utilization of VRIS generally improves students' performance scores (SMD = 1.04; 95% CI, -0.35 to 2.44; I2 > 50%; p = .13) and reduces task completion time (SMD = -0.03; 95% CI, 1.39-7.72; I2 > 50%; p = .93). Notably, using VRIS significantly enhanced the performance scores in implant surgery practice (SMD = 0.26; 95% CI, 0.09-0.42; p < .05). Additionally, the VRIS method significantly reduced task completion time in the cavity restorative preparation task (SMD = -1.19; 95% CI, -1.85 to -0.53; p < .05). CONCLUSION Engaging in practice with VRIS has the potential to enhance learning proficiency in prosthodontic education. The advantages associated with VRIS encompass the provision of immediate feedback, decreased task completion time, heightened confidence and motivation, accelerated skill acquisition, improved performance scores, and increased learning engagement.
Collapse
Affiliation(s)
- Hang-Nga Mai
- Institute for Translational Research in Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
- Dental School of Hanoi University of Business and Technology, Hanoi, Vietnam
| | - Hien Chi Ngo
- UWA Dental School, University of Western Australia, Perth, Western Australia, Australia
| | - Seok-Hwan Cho
- Department of Prosthodontics, University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa, USA
| | - Chau Pham Duong
- Dental School of Hanoi University of Business and Technology, Hanoi, Vietnam
| | - Hai Yen Mai
- School of Dentistry, Hanoi Medical University, Hanoi, Vietnam
| | - Du-Hyeong Lee
- Institute for Translational Research in Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| |
Collapse
|
3
|
Fakhruddin KS, Matsubara VH, Warnakulasuriya S, Tilakaratne WM, Ngo HC, Samaranayake LP. Mucormycosis of the Mandible and Tongue: A Systematic Scoping Review. Int Dent J 2023:S0020-6539(23)00976-0. [PMID: 38143163 DOI: 10.1016/j.identj.2023.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 12/26/2023] Open
Abstract
AIM Mucormycosis is a rare human infection associated with Mucorales, a group of filamentous moulds found in different environmental niches. Its oral manifestations may occur in the mandible and tongue despite being rare. We aimed to systematically review the data on clinical manifestations, risk factors, diagnostic approaches, treatment options, and outcomes of mandibular and tongue mucormycosis. METHODS An electronic search of articles published between January 1975 and November 2022 in PubMed, Web of Science, and EMBASE databases was performed. A total of 22 articles met the inclusion criteria and reported 27 cases of oral mucormycosis in total. RESULTS Fourteen patients had mandibular mucormycosis signs unrelated to COVID-19 infection, 6 had SARS-CoV-2-related mandibular mucormycosis, and 6 had manifestations in the tongue. All published case reports during the COVID-19 pandemic were from India. Patient ages ranged from 4 months old to 82 years, and most patients had important comorbidities, such as blood dyscrasias related to immune deficiency and uncontrolled type 2 diabetes mellitus. The signs and symptoms of mandibular and tongue mucormycosis varied from dental pain, loose teeth, and nonhealing sockets to dysphagia and paraesthesia of the lip. Some patients also reported trismus, draining sinus tract, and facial pain. The diagnosis of oral mucormycosis was based on a combination of clinical, radiographic, and histopathologic findings by demonstrating fungal hyphae in tissue specimens. In most cases, mucormycosis was managed with systemic amphotericin B, strict glycaemic control, and aggressive surgical debridement of infected tissue, minimising the progression of the fungal infection and thus improving the survival rate. In some cases, combined antifungal therapy, antibiotic therapy, and chlorhexidine mouthwashes were used successfully. CONCLUSIONS Recognition of the signs and symptoms by oral care providers is pertinent for the early diagnosis and treatment of tongue and mandibular mucormycosis, and providers should be aware of the possibility of this opportunistic fungal infection in patients with COVID-19. A multidisciplinary approach is recommended for the management of this lethal infection.
Collapse
Affiliation(s)
- Kausar Sadia Fakhruddin
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, United Arab Emirates
| | | | | | | | - Hien Chi Ngo
- Dental School, University of Western Australia, Perth, Western Australia, Australia
| | - Lakshman P Samaranayake
- Faculty of Dentistry, The University of Hong Kong, Hong Kong. Special Administrative Region, China.
| |
Collapse
|
4
|
Samaranayake LP, Fakhruddin KS, Ngo HC, Bandara MHMN, Leung YY. Oro-facial Mycoses in Coronavirus Disease-2019 (COVID-19): A Systematic Review. Int Dent J 2022; 72:607-620. [PMID: 35367044 PMCID: PMC8885299 DOI: 10.1016/j.identj.2022.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 12/22/2022] Open
Abstract
Objectives Studies reviewing orofacial mycoses in coronavirus disease-2019 (COVID-19) caused by severe acute respiratory syndrome 2 (SARS-CoV-2) infection are sparse. Here we review the major oral and maxillofacial mycoses of COVID-19, the associated comorbidities, and the probable precipitating factors. Methods English-language manuscripts published between March 2020 and October 2021 were searched using PubMed, OVID, SCOPUS, and Web of Science databases, using appropriate keywords. Results We identified 30 articles across 14 countries, which met the inclusion criteria of PRISMA guidelines. These yielded a total of 292 patients with laboratory-confirmed COVID-19, 51.4% (n = 150) of whom presented with oral and maxillofacial fungal infections, mainly comprising candidosis, mucormycosis, and aspergillosis. Candida infections were the most prevalent, present in 64% (n = 96), followed by mucormycosis, and only a single case of aspergillosis was noted. Oral and maxillofacial mycoses were predominantly seen in those with comorbidities, especially in those with diabetes (52.4%). Oral mucormycosis was noted in 8.6% (n = 13) and mainly manifested on the hard palate. An overall event rate of oral/maxillofacial mucormycosis manifestation in patients with COVID-19 with diabetes mellitus type 1/2 was about 94% (49/52; 95% confidence interval, 0.73%-0.89%), implying a very high association between diabetes mellitus and the latter condition. All fungal infections appeared either concurrently with COVID-19 symptoms or during the immediate recovery period. Conclusions SARS-CoV-2 infection–related immunosuppression, steroid therapy, as well as comorbidities such as diabetic hyperglycemia appear to be the major predisposing factors for the onset of oral and maxillofacial mycoses in patients with COVID-19 across all age groups.
Collapse
|
5
|
Fakhruddin KS, Samaranayake LP, Hamoudi RA, Ngo HC, Egusa H. Diversity of site-specific microbes of occlusal and proximal lesions in severe- early childhood caries (S-ECC). J Oral Microbiol 2022; 14:2037832. [PMID: 35173909 PMCID: PMC8843124 DOI: 10.1080/20002297.2022.2037832] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background Severe-early childhood caries (S-ECC) a global problem of significant concern, commonly manifest on the occlusal, and proximal surfaces of affected teeth. Despite the major ecological differences between these two niches the compositional differences, if any, in the microbiota of such lesions is unknown. Methods Deep-dentine caries samples from asymptomatic primary molars of children with S-ECC (n 19) belonging to caries-code 5/6, (ICDAS classification) were evaluated. Employing two primer pools, we amplified and compared the bacterial 16S rRNA gene sequences of the seven hypervariable regions (V2—V4 and V6—V9) using NGS-based assay. Results Bray-Curtisevaluation indicated that occlusal lesions (OL) had a more homogeneous community than the proximal lesions (PL) with significant compositional differences at the species level (p = 0.01; R- 0.513). Together, the occlusal and proximal niches harbored 263 species, of which 202 (76.8%) species were common to both , while 49 (18.6%) and 12 (4.6%) disparate species were exclusively isolated from the proximal and occlusal niches, respectively. The most commonl genera at both niches included Streptococcus, Prevotella, and Lactobacillus. S. mutans was predominant in PL (p ≤ 0.05), and Atopobium parvulum (p = 0.01) was predominant in OL. Conclusions Distinct differences exist between the caries microbiota of occlusal and proximal caries in S-ECC.
Collapse
Affiliation(s)
- Kausar Sadia Fakhruddin
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai-city, Japan
| | | | - Rifat Akram Hamoudi
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, UAE
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Hien Chi Ngo
- Uwa Dental School, The University of Western Australia, Perth, Australia
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai-city, Japan
| |
Collapse
|
6
|
Rahman B, El-Damanhoury HM, Sheela S, Ngo HC. Effect Of Calcium Silicate, Sodium Phosphate, and Fluoride on Dentinal Tubule Occlusion and Permeability in Comparison to Desensitizing Toothpaste: An In Vitro Study. Oper Dent 2021; 46:641-649. [PMID: 35507903 DOI: 10.2341/20-008-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2020] [Indexed: 11/23/2022]
Abstract
This study compared the ability of a calcium silicate-, sodium phosphate-, and fluoride-based (CSSPF) toothpaste (TP) in promoting dentinal tubule occlusion and reducing dentin permeability with that of other commercially available antisensitivity TPs. Seventy-eight dentin discs (1.0±0.1 mm thick) were prepared from the midcoronal area and were treated with 37% phosphoric acid for 2 minutes; then they were randomly divided into six groups according to treatments: No treatment [positive control (PC)], entirely covered with nail varnish [negative control (NC)], hydroxyapatite (HAP)-containing TP [Desensin Repair (DES)], NovaMin-based [Sensodyne Repair & Protect (SEN)], CSSPF-based TP [Regenerate Advanced (REG)], sodium monofluorophosphate, potassium citrate, zinc citrate TP [Signal Sensitive Expert (SIG)]. Dentin permeability was tested by the dye percolation method (DP%). Scanning electron microscope (SEM) micromorphological and energy dispersive X-ray elemental analysis (EDX) of the dentin surfaces were done following each treatment. Results were analyzed using one-way analysis of variance (ANOVA) followed by Tukey post hoc test at a 95% confidence level (α=0.05). All the tested groups showed higher DP% than NC and lower percolation than the PC (p<0.05). REG and SIG were statistically comparable, and showed significantly lower DP% (p<0.05) than SEN and DES. None of the TPs tested was able to obliterate the lumen of the dentinal tubules (DT) completely. REG exhibited the highest weight percentage of calcium deposition, followed by SEN. Compared to the tested desensitizing TPs, CSSPF-based TPs demonstrated equal or less dentin permeability and better DT occlusion.
Collapse
Affiliation(s)
- B Rahman
- Betul Rahman, associate professor, Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - H M El-Damanhoury
- *Hatem M El-Damanhoury, associate professor, Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - S Sheela
- Soumya Sheela, post-doctoral research associate, Sharjah Institute of Medical Research, University of Sharjah, Sharjah, UAE
| | - H C Ngo
- Hien C Ngo, professor, Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| |
Collapse
|
7
|
Fakhruddin KS, Perera Samaranayake L, Egusa H, Ngo HC, Pesee S. Profuse diversity and acidogenicity of the candida-biome of deep carious lesions of Severe Early Childhood Caries (S-ECC). J Oral Microbiol 2021; 13:1964277. [PMID: 34447489 PMCID: PMC8386706 DOI: 10.1080/20002297.2021.1964277] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Introduction: The retentive niches of deep caries lesions have a distinct biome. Methods: We evaluated the site-specific (occlusal and proximal) Candida-biome of Severe-Early Childhood Caries (S-ECC) in 66- children (132 lesions). Asymptomatic primary molars fitting the definition of the International Caries Detection and Assessment-(ICDAS)-caries-code 5/6 were analyzed. Deep-dentinal sampling and simultaneous assessment of pH were performed. Clinical isolates were speciated using multiplex-PCR and evaluated for their acidogenic and aciduric potential.Results: Surprisingly, a high prevalence of Candida species (72.7%), either singly or in combination, was noted from both the proximal and occlusal cavities. C. tropicalis was the most prevalent species (47%; 34/72), followed by C. krusei (43.1%; 31/72) and C. albicans (40.3%; 29/72), with C. glabrata being the least (9.7%; 7/72). Over 45% low-pH niches (pH <7) of both sites yielded either dual or triple species of Candida. Genotyping revealed three distinct C. albicans genotypes (A, B, and C) with (14/29; 48.3%) of strains belonging to Genotype A. All four evaluated Candida species exhibited acidogenic and aciduric potential, C. tropicalis being the most potent.Conclusion: This, the first report of the high-density, multispecies, yeast colonization of deep-dentinal lesions in S-ECC, suggests that the Candida-biome plays a significant etiologic role in the condition, possibly due to their profound acidogenicity in milieus rich in dietary carbohydrates.
Collapse
Affiliation(s)
| | | | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Hien Chi Ngo
- University of Western Australia, Perth, Australia
| | - Siripen Pesee
- Faculty of Dentistry, Department of Oral Diagnostic Science, Faculty of Dentistry, Thammasat University, Pathum Thani, Thailand
| |
Collapse
|
8
|
Haiat A, Ngo HC, Samaranayake LP, Fakhruddin KS. The effect of the combined use of silver diamine fluoride and potassium iodide in disrupting the plaque biofilm microbiome and alleviating tooth discoloration: A systematic review. PLoS One 2021; 16:e0252734. [PMID: 34115788 PMCID: PMC8195348 DOI: 10.1371/journal.pone.0252734] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/18/2021] [Indexed: 11/30/2022] Open
Abstract
Silver diamine fluoride (SDF) is used in minimally invasive dentistry for arresting dental caries. However, discoloration of teeth is a significant side effect that has limited the use of SDF. Hence, the application of potassium iodide (KI) following SDF has been proposed to ameliorate the staining. Although antimicrobial activity is one of the major mechanisms of the caries-arresting effect of SDF, the antimicrobial potency of SDF/KI combination is unclear. Thus, the primary objective of this systematic review was to appraise the studies on the antimicrobial efficacy of SDF/KI combination on cariogenic microbes. The secondary objective was to summarize the evidence on the potential of KI in reducing the discoloration associated with the application of SDF. Electronic databases of Medline via PubMed, Cochrane Library, Web of Science, and EBSCO host were searched for English language manuscripts from January 2005 to 15th November 2020. The reference lists of these manuscripts were manually searched for additional studies. Twelve studies were included in the final analysis, seven of which have investigated the antimicrobial efficacy of SDF/KI, and the rest have examined the anti-staining potential of KI. The exploratory findings from the reviewed articles revealed the promising antimicrobial potential of SDF/KI on cariogenic microbes associated with dentine caries. There is, however, contradictory evidence on the effect of SDF/KI on tooth color. The reviewed in-vitro studies indicated significant effectiveness of KI in preventing staining. A clinical trial on primary dentition showed 25% reduction in the incidence of staining by SDF after applying KI, while a clinical study on root caries in adults showed no significant effect. Within the methodological limitations of this review, we conclude that for arresting dental caries, SDF could be combined with KI, as there may be a lower likelihood of staining. Further, well-designed clinical trials on the antimicrobial and anti-staining effect of SDF/KI are needed to obtain more robust evidence.
Collapse
Affiliation(s)
- Anahita Haiat
- UWA Dental School, The University of Western Australia, Perth, WA, Australia
| | - Hien Chi Ngo
- UWA Dental School, The University of Western Australia, Perth, WA, Australia
| | - Lakshman Perera Samaranayake
- UWA Dental School, The University of Western Australia, Perth, WA, Australia
- Faculty of Dentistry, University of Hong Kong, Hong Kong, Hong Kong
| | - Kausar Sadia Fakhruddin
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates
| |
Collapse
|
9
|
de Lima Navarro MF, Pascotto RC, Borges AFS, Soares CJ, Raggio DP, Rios D, Bresciani E, Molina GF, Ngo HC, Miletić I, Frencken J, Wang L, Menezes-Silva R, Puppin-Rontani RM, de Carvalho RM, Gurgan S, Leal SC, Tüzüner T, Fagundes TC, Nicholson JW, Sidhu SK. Consensus on glass-ionomer cement thresholds for restorative indications. J Dent 2021; 107:103609. [PMID: 33610589 DOI: 10.1016/j.jdent.2021.103609] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 02/14/2021] [Accepted: 02/15/2021] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE The aim of this paper is to present the results of a consensus meeting on the threshold property requirements for the clinical use of conventional glass-ionomer cements (GICs) for restorative indications. METHODS Twenty-one experts on GICs evaluated the results of tests on mechanical and optical properties of 18 different brands of restorative GICs: Bioglass R [B], Chemfil Rock [CR], Equia Forte [EF], Gold Label 2 [GL2], Gold Label 9 [GL9], Glass Ionomer Cement II [GI], Ionglass [IG], Ion Z [IZ], Ionomaster [IM], Ionofil Plus [IP], Ionostar Plus [IS], Ketac Molar Easymix [KM], Magic Glass [MG], Maxxion R [MA], Riva Self Cure [R], Vidrion R [V], Vitro Fil [VF] and Vitro Molar [VM]. All experiments were carried out by a team of researchers from Brazil and England following strict protocols, under the same laboratory conditions throughout, and maintaining data integrity. RESULTS There was consensus on: determining as primary properties of the material: compressive strength, microhardness, acid erosion and fluoride release, and as secondary properties: contrast ratio and translucency parameter, in order to rank the materials. Seven brands were below the thresholds for restorative indications: IZ, IM, IG, MA, VF, B and MG. CONCLUSIONS Based on the primary properties adopted as being essential for restorative indications, the conventional restorative GICs that met the thresholds and could be considered suitable as long-term restorative materials were: EF, GI, GL9, KM, IP, GL2, IS, CR, V, VM and R. A decision-making process to select the best GIC must also include results from clinical trials. CLINICAL SIGNIFICANCE This study provides a ranking of GICs that could be considered suitable as long-term restorative materials based on their main properties.
Collapse
Affiliation(s)
- Maria Fidela de Lima Navarro
- Department of Restorative Dentistry, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75 - Jardim Brasil, 17012-901, Bauru, Brazil.
| | - Renata Corrêa Pascotto
- Department of Restorative Dentistry, State University of Maringá, Av. Colombo, 5790 - Jd. Universitário, 87020-900, Maringá, Brazil
| | - Ana Flávia Sanches Borges
- Department of Restorative Dentistry, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75 - Jardim Brasil, 17012-901, Bauru, Brazil
| | - Carlos José Soares
- Department of Restorative Dentistry, Federal University of Uberlândia, Av. João Naves de Ávila, 2121 - Santa Mônica, 38408-100, Uberlândia, Brazil
| | - Daniela Prócida Raggio
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 - Butantã, 05508-000, São Paulo, Brazil
| | - Daniela Rios
- Department of Restorative Dentistry, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75 - Jardim Brasil, 17012-901, Bauru, Brazil
| | - Eduardo Bresciani
- Institute of Science and Technology, State University of São Paulo, Av. Eng. Francisco José Longo, 777 - Jardim São Dimas, 12245-00, São José dos Campos, Brazil
| | | | - Hien Chi Ngo
- Dean and Head of School/Director of OHCWA, The University of Western Australia, 512, 17 Monash Avenue, Nedlands, WA 6009, Australia
| | - Ivana Miletić
- School of Dental Medicine, University of Zagreb, Gundulićeva ul. 5, 10000, Zagreb, Croatia
| | - Jo Frencken
- Department of Dentistry, Radboud University Medical Centre, Philips van Leydenlaan 25, 6525 EX, Nijmegen, the Netherlands
| | - Linda Wang
- Department of Restorative Dentistry, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75 - Jardim Brasil, 17012-901, Bauru, Brazil
| | - Rafael Menezes-Silva
- Department of Restorative Dentistry, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75 - Jardim Brasil, 17012-901, Bauru, Brazil
| | | | | | - Sevil Gurgan
- Department of Restorative Dentistry, Hacettepe University, 06800, Ankara, Turkey
| | | | | | - Ticiane Cestari Fagundes
- Araçatuba School of Dentistry, State University of São Paulo, Rua José Bonifácio, 1193, 16015-050, Araçatuba, Brazil
| | - John William Nicholson
- Bluefield Centre for Biomaterials, Unit 34, 67-68 Hatton Garden, Holborn, London EC1N 8JY, England, United Kingdom
| | - Sharanbir Kaur Sidhu
- Queen Mary University of London, Mile End Rd, Bethnal Green, London E1 4NS, England, United Kingdom
| |
Collapse
|
10
|
Samaranayake LP, Fakhruddin KS, Mohammad OE, Panduwawala C, Bandara N, Ngo HC. Attributes of dysgeusia and anosmia of coronavirus disease 2019 (COVID-19) in hospitalized patients. Oral Dis 2020; 28 Suppl 1:891-898. [PMID: 33176049 DOI: 10.1111/odi.13713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/22/2020] [Accepted: 10/27/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVES While chemosensory dysfunctions, dysgeusia and anosmia/hyposmia, are recognized as distinctive symptoms of COVID-19, their temporality of presentation and association with the patient age, gender, disease severity, and comorbidities has been sparsely studied. Hence, we evaluated the latter associations of chemosensory dysfunction, in hospitalized COVID-19 patients in the United Arab Emirates (UAE). MATERIALS AND METHODS Information on chemosensory dysfunction and history of chronic systemic comorbidities, if any, was obtained from 149 COVID-19 patients in an infectious disease hospital in UAE, using their medical records, as well as from a face-to-face questionnaire survey. Additionally, a modified SNOT-22 questionnaire that measures disease-specific quality of life in patients with upper respiratory tract affections was also administered. RESULTS Chemosensory dysfunction was reported by 94.6% of the cohort, and anosmia with dysgeusia was significantly more in males than females with severe COVID-19. Males with moderate COVID-19 and systemic comorbidities were more likely to present with chemosensory dysfunction in comparison with females. SNOT-22 questionnaire revealed that nasal blockage and runny nose were more prevalent in mild/moderate, than in the severe, state of COVID-19. CONCLUSION Our data confirm the commonality of chemosensory dysfunction during COVID-19 progression, and the significantly more pronounced combined dysfunction in males with severe COVID-19, and comorbidities.
Collapse
Affiliation(s)
| | - Kausar Sadia Fakhruddin
- Departments of Preventive and Restorative Dentistry and Oral and Craniofacial Health Sciences, University of Sharjah, Sharjah, UAE
| | | | - Chamila Panduwawala
- Departments of Preventive and Restorative Dentistry and Oral and Craniofacial Health Sciences, University of Sharjah, Sharjah, UAE
| | - Nihal Bandara
- Oral Microbiology, Bristol Dental School, University of Bristol, Bristol, UK
| | - Hien Chi Ngo
- Dental School, University of Western Australia, Perth, WA, Australia
| |
Collapse
|
11
|
Abdullah N, Al Marzooq F, Mohamad S, Abd Rahman N, Rani KGA, Chi Ngo H, Samaranayake LP. The antibacterial efficacy of silver diamine fluoride (SDF) is not modulated by potassium iodide (KI) supplements: A study on in-situ plaque biofilms using viability real-time PCR with propidium monoazide. PLoS One 2020; 15:e0241519. [PMID: 33141868 PMCID: PMC7608867 DOI: 10.1371/journal.pone.0241519] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/15/2020] [Indexed: 12/21/2022] Open
Abstract
Silver diamine fluoride (SDF) is commonly used to arrest caries lesions, especially in early childhood caries. Recently, it was suggested that SDF can be combined with potassium iodide (KI) to minimize the discoloration of demineralized dentine associated with SDF application. However, the antibacterial efficacy of SDF alone or combined with KI on in-situ biofilm is unknown. Hence, we compared the anti-plaque biofilm efficacy of two different commercially available SDF solutions, with or without KI, using an in-situ biofilm, analysed using viability real-time PCR with propidium monoazide (PMA). Appliance-borne in-situ biofilm samples (n = 90) were grown for a period of 6 h in five healthy subjects who repeated the experiment on three separate occasions, using a validated, novel, intraoral device. The relative anti-biofilm efficacy of two SDF formulations; 38.0% Topamine (SDFT) and 31.3%, Riva Star (SDFR), KI alone, and KI in combination with SDFR (SDFR+KI) was compared. The experiments were performed by applying an optimized volume of the agents onto the biofilm for 1min, mimicking the standard clinical procedure. Afterwards the viability of the residual biofilm bacteria was quantified using viability real-time PCR with PMA, then the percentage of viable from total bacteria was calculated. Both SDF formulations (SDFT and SDFR) exhibited potent antibacterial activities against the in-situ biofilm; however, there was non-significant difference in their efficacy. KI alone did not demonstrate any antibacterial effect, and there was non-significant difference in the antibacterial efficacy of SDF alone compared to SDF with KI, (SDFT v SDFR/KI). Thus, we conclude that the antibacterial efficacy of SDF against plaque biofilms is not modulated by KI supplements. Viability real-time PCR with PMA was successfully used to analyze the viability of naturally grown oral biofilm; thus, the same method can be used to test the antimicrobial effect of other agents on oral biofilms in future research.
Collapse
Affiliation(s)
- Nizam Abdullah
- College of Dental Medicine, University of Sharjah, Sharjah, UAE
- School of Dental Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, Kelantan, Malaysia
| | - Farah Al Marzooq
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, UAE
| | - Suharni Mohamad
- School of Dental Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, Kelantan, Malaysia
- * E-mail:
| | - Normastura Abd Rahman
- School of Dental Sciences, Universiti Sains Malaysia Health Campus, Kubang Kerian, Kelantan, Malaysia
| | | | - Hien Chi Ngo
- College of Dental Medicine, University of Sharjah, Sharjah, UAE
- UWA Dental School, The University of Western Australia, Nedlands, Australia
| | - Lakshman Perera Samaranayake
- College of Dental Medicine, University of Sharjah, Sharjah, UAE
- Faculty of Dentistry, University of Hong Kong, Hong Kong, China (SAR)
| |
Collapse
|
12
|
Samaranayake LP, Fakhruddin KS, Ngo HC, Chang JWW, Panduwawala C. The effectiveness and efficacy of respiratory protective equipment (RPE) in dentistry and other health care settings: a systematic review. Acta Odontol Scand 2020; 78:626-639. [PMID: 32881590 DOI: 10.1080/00016357.2020.1810769] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The global pandemic of coronavirus disease-19, caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), is the latest hazard facing healthcare workers (HCW) including dental care workers (DCW). It is clear that the major mode of SARS-CoV-2 transmission is the airborne route, through inhalation of virus-infested aerosols and droplets. Several respiratory protection equipment (RPE), including masks, face shields/visors, and respirators, are available to obviate facial and conjunctival contamination by microbes. However, as their barrier value against microbial inhalation has not been evaluated, we systematically reviewed the data on the effectiveness and efficacy of facemasks and respirators, including protective eyewear, with particular emphasis on dental healthcare. MATERIAL AND METHODS PubMed, MEDLINE, the Cochrane Library, and Embase databases were searched between 01January 1990 and 15 May 2020. RESULTS Of 310 identified English language records, 21 were included as per eligibility criteria. In clinical terms, wearing layered, face-fitting masks/respirators and protective-eyewear can limit the spread of infection among HCWs. Specifically, combined interventions such as a face mask and a face shield, better resist bioaerosol inhalation than either alone. The prolonged and over-extended use of surgical masks compromise their effectiveness. CONCLUSIONS In general, RPE is effective as a barrier protection against aerosolized microbes in healthcare settings. But their filtration efficacy is compromised by the (i) inhalant particle size, (ii) airflow dynamics, (iii) mask-fit factor, (iv) period of wear, (v) 'wetness' of the masks, and (vi) their fabrication quality. The macro-data presented here should inform policy formulation on RPE wear amongst HCWs.
Collapse
Affiliation(s)
| | | | - Hien Chi Ngo
- School of Dentistry, University of Western Australia, Perth, Australia
| | - Jeffrey Wen Wei Chang
- Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Chamila Panduwawala
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE
- Department Oral and Craniofacial Health Sciences, University of Sharjah, Sharjah, UAE
| |
Collapse
|
13
|
Fakhruddin KS, Egusa H, Ngo HC, Panduwawala C, Pesee S, Samaranayake LP. Clinical efficacy and the antimicrobial potential of silver formulations in arresting dental caries: a systematic review. BMC Oral Health 2020; 20:160. [PMID: 32493272 PMCID: PMC7268710 DOI: 10.1186/s12903-020-01133-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 05/06/2020] [Indexed: 12/13/2022] Open
Abstract
Background The use of silver-formulation as microbicide to arrest dentinal caries is gaining popularity. The primary objective of the present appraisal was to systematically review the clinical (in vivo) applications and antimicrobial potential of silver-containing formulations in arresting dentinal caries. Our secondary aim was to sum up the available in vitro applications of silver-containing formulations against cariogenic microbes isolated from dentine lesions. Methods Ovid MEDLINE, EBSCO host, Web of Science, and Cochrane Library databases was searched between January 2009–May 2019. Results In vivo: We observed conflicting evidence of antimicrobial efficacy of SDF on a diverse array of microbial taxa present in carious dentine of primary and permanent teeth. Moreover, there is insufficient evidence on the application of AgNP-fluoride as an effective microbicidal against cariogens of dentine lesions. In vitro: We found a good evidence of microbicidal efficacy of silver diamine fluoride (SDF) on selective cariogenic microbes in human dentine model. Additionally, a good evidence was noted of in vitro application of silver nanoparticles (AgNPs) as a useful microbicidal against S. mutans adhesion, growth and subsequent biofilm formation in human dentine models. Conclusions Taken together, in vitro evidence indicates the promising antimicrobial potential of silver-based formulations (SDF and nanosilver) against the predominant cariogenic flora, particularly from dentine lesions. Post-treatment clinical data of either the bactericidal and bacteriostatic effects of SDF or nanosilver are sparse. Furthermore, the current understanding of the specific size, concentration, antimicrobial mechanisms, and toxicological aspects of nano-silver compounds is inadequate to draw firm conclusions on their clinical utility.
Collapse
Affiliation(s)
- Kausar Sadia Fakhruddin
- Department of Preventive and Restorative Dentistry, M28-125, College of Dental Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates.,Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai City, 980-8575, Japan
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai City, 980-8575, Japan.
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, M28-125, College of Dental Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Chamila Panduwawala
- Department of Preventive and Restorative Dentistry, M28-125, College of Dental Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Siripen Pesee
- Faculty of Dentistry, Department of Oral Diagnostic Science, Faculty of Dentistry, Thammasat University, Pathum Thani, Thailand
| | - Lakshman Perera Samaranayake
- Department of Preventive and Restorative Dentistry, M28-125, College of Dental Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates. .,The University of Hong Kong, Hong Kong Special Administrative Region, China.
| |
Collapse
|
14
|
Polychronakis N, Lagouvardos P, Polyzois G, Ngo HC. Intra- and inter-brand color differences of denture teeth under different illuminations. J Appl Oral Sci 2020; 28:e20190693. [PMID: 32401940 PMCID: PMC7665263 DOI: 10.1590/1678-7757-2019-0693] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 02/28/2020] [Indexed: 11/22/2022] Open
Abstract
Debonding, staining and wear are usually the reasons for denture teeth replacement by new ones from same or different brands.
Collapse
Affiliation(s)
- Nick Polychronakis
- Department of Prosthodontics, School of Dentistry, National & Kapodistrian University of Athens, Athens, Greece
| | - Panagiotis Lagouvardos
- Department of Operative Dentistry, School of Dentistry, National & Kapodistrian University of Athens, Athens, Greece
| | - Gregory Polyzois
- Department of Prosthodontics, School of Dentistry, National & Kapodistrian University of Athens, Athens, Greece
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, School of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates
| |
Collapse
|
15
|
Fakhruddin KS, Egusa H, Ngo HC, Panduwawala C, Pesee S, Venkatachalam T, Samaranayake LP. Silver diamine fluoride (SDF) used in childhood caries management has potent antifungal activity against oral Candida species. BMC Microbiol 2020; 20:95. [PMID: 32295517 PMCID: PMC7161255 DOI: 10.1186/s12866-020-01776-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 03/30/2020] [Indexed: 12/24/2022] Open
Abstract
Background The microbiome of Severe-Early Childhood Caries (S-ECC), is characterized by an ecosystem comprising bacterial and fungal species, with a predominance of Candida species. Hence, an anti-cariogen effective against both bacteria and fungi would be valuable in the management of S-ECC. Here we evaluate the antifungal effect of silver diamine fluoride (SDF) against 35-clinical yeast isolates (Ten-each of C. albicans, C. krusei, C. tropicalis and five C. glabrata strains) from dentinal caries-lesions from S-ECC. Results Disc-diffusion and time-kill assays as well as MIC50 and MIC90 evaluations against therapeutic concentrations confirmed the broad-spectrum anti-candidal potency of SDF. Ultrastructural images revealed morphologic aberrations of yeast-cell walls on exposure to SDF. All C. krusei and C. glabrata isolates were significantly more sensitive to SDF, relative to the standard antifungal fluconazole. Further, SDF appears to effectively abrogate filamentation of C. albicans even at very low concentrations. Conclusions Our data, for the first time, elucidate the antifungal potency of SDF, in addition to its known antibacterial activity, in the management of S-ECC.
Collapse
Affiliation(s)
- Kausar Sadia Fakhruddin
- Department of Preventive and Restorative Dentistry, University City- Sharjah, University of Sharjah, 27272, United Arab Emirates.,Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai-city, Miyagi, 980-8575, Japan
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai-city, Miyagi, 980-8575, Japan.
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, University City- Sharjah, University of Sharjah, 27272, United Arab Emirates
| | - Chamila Panduwawala
- Department of Preventive and Restorative Dentistry, University City- Sharjah, University of Sharjah, 27272, United Arab Emirates
| | - Siripen Pesee
- Faculty of Dentistry, Department of Oral Diagnostic Science, Faculty of Dentistry, Thammasat University, Pathum Thani, Thailand
| | - Thenmozhi Venkatachalam
- Sharjah Institute of Medical Research, University City- Sharjah, University of Sharjah, 27272, United Arab Emirates
| | - Lakshman Perera Samaranayake
- Department of Preventive and Restorative Dentistry, University City- Sharjah, University of Sharjah, 27272, United Arab Emirates. .,The University of Hong Kong, Hong Kong, Special Administrative Region, China.
| |
Collapse
|
16
|
Fakhruddin KS, Perera Samaranayake L, Egusa H, Chi Ngo H, Panduwawala C, Venkatachalam T, Kumarappan A, Pesee S. Candida biome of severe early childhood caries (S-ECC) and its cariogenic virulence traits. J Oral Microbiol 2020; 12:1724484. [PMID: 32128040 PMCID: PMC7034489 DOI: 10.1080/20002297.2020.1724484] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/18/2019] [Accepted: 12/19/2019] [Indexed: 01/04/2023] Open
Abstract
The protected niche of deep-caries lesions is a distinctive ecosystem. We assessed the Candida biome and its cariogenic traits from dentin samples of 50 children with severe-early childhood caries (S-ECC). Asymptomatic, primary molars belonging to International Caries Detection and Assessment-ICDAS caries-code 5 and 6 were analyzed, and C. albicans (10-isolates), C. tropicalis (10), C. krusei (10), and C. glabrata (5) isolated from the lesions were then evaluated for their biofilm formation, acidogenicity, and the production of secreted hydrolases: hemolysins, phospholipase, proteinase and DNase. Candida were isolated from 14/43 ICDAS-5 lesions (32.5%) and 44/57 ICDAS-6 lesions (77.2%). Compared to, ICDAS-5, a significantly higher frequency of multi-species infestation was observed in ICDAS-6 lesions (p=0.001). All four candidal species (above) showed prolific biofilm growth, and an equal potency for tooth demineralization. A significant interspecies difference in the mean phospholipase, as well as proteinase activity was noted (p < 0.05), with C. albicans being the predominant hydrolase producer. Further, a positive correlation between phospholipase and proteinase activity of Candida-isolates was noted (r = 0.818, p < 0.001). Our data suggest that candidal mycobiota with their potent cariogenic traits may significantly contribute to the development and progression of S-ECC.
Collapse
Affiliation(s)
| | - Lakshman Perera Samaranayake
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE.,Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE
| | - Chamila Panduwawala
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE
| | | | - Allagappan Kumarappan
- Research Institute of Medical and Health Sciences, University of Sharjah, Sharjah, UAE
| | - Siripen Pesee
- Faculty of Dentistry, Thammasat University, Pathum Thani, Thailand
| |
Collapse
|
17
|
Abdullah N, Al-Marzooq F, Mohamad S, Abd Rahman N, Chi Ngo H, Perera Samaranayake L. Intraoral appliances for in situ oral biofilm growth: a systematic review. J Oral Microbiol 2019; 11:1647757. [PMID: 31489127 PMCID: PMC6713217 DOI: 10.1080/20002297.2019.1647757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 07/15/2019] [Accepted: 07/22/2019] [Indexed: 10/29/2022] Open
Abstract
Background: Oral biofilms are the root cause of major oral diseases. As in vitro biofilms are not representative of the intraoral milieu, various devices have been manufactured over the years to develop Appliance Grown Oral Biofilm (AGOB). Objective: To review various intraoral appliances used to develop AGOB for microbiological analysis, and to judge the optimal means for such analyses. Design: Four databases (PubMed, Science Direct, Scopus and Medline) were searched by two independent reviewers, and articles featuring the key words 'device' OR 'splint' OR 'appliance'; 'Oral biofilm' OR 'dental plaque'; 'in vivo' OR 'in situ'; 'Microbiology' OR 'Bacteria' OR 'microbiome'; were included. The standard Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) were adopted for data gathering. Results: Of the 517 articles which met the initial inclusion criteria, 24 were deemed eligible for review. The age of the AGOB, sampled at various intervals, ranged from 30 min to 28 days. The most commonly used microbiome analytical methods were fluorescence microscopy, total cell count using conventional, and molecular tools including Next Generation Sequencing (NGS) platforms. Conclusions: No uniformly superior method for collecting AGOB could be discerned. NGS platforms are preferable for AGOB analyses.
Collapse
Affiliation(s)
- Nizam Abdullah
- College of Dental Medicine, University of Sharjah, Sharjah, UAE.,School of Dental Sciences, Universiti Sains Malaysia, Health Campus, Kota Bharu, Malaysia
| | - Farah Al-Marzooq
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah, UAE
| | - Suharni Mohamad
- School of Dental Sciences, Universiti Sains Malaysia, Health Campus, Kota Bharu, Malaysia
| | - Normastura Abd Rahman
- School of Dental Sciences, Universiti Sains Malaysia, Health Campus, Kota Bharu, Malaysia
| | - Hien Chi Ngo
- College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - Lakshman Perera Samaranayake
- College of Dental Medicine, University of Sharjah, Sharjah, UAE.,Faculty of Dentistry, University of Hong Kong, Hong Kong
| |
Collapse
|
18
|
Fakhruddin KS, Ngo HC, Samaranayake LP. Cariogenic microbiome and microbiota of the early primary dentition: A contemporary overview. Oral Dis 2018; 25:982-995. [PMID: 29969843 DOI: 10.1111/odi.12932] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 12/24/2022]
Abstract
Recent advances in the field of molecular microbiology provide an unprecedented opportunity to decipher the vast diversity of the oral microbiome in health and disease. Here, we provide a contemporary overview of the oral microbiome and the microbiota of early childhood caries (ECC) with particular reference to newer analytical techniques. A MEDLINE search revealed a total of 20 metagenomic studies describing cariogenic microbiomes of ECC, 10 of which also detailed the healthy microbiomes. In addition, seven studies on site-specific microbiomes, focusing on acidogenic and aciduric microbiota of deep-dentinal lesions, were also reviewed. These studies evaluated plaque and saliva of children aged 1.5-11 years, in cohorts of 12-485 individuals. These studies reveal a very rich and diverse microbial communities, with hundreds of different phylotypes and microbial species, including novel species and phyla such as Scardovia wiggsiae, Slackia exigua, Granulicatella elegans, Firmicutes in the plaque biofilms of children with ECC. On the contrary, bacteria such as Streptococcus cristatus, S. gordonii, S. sanguinis, Corynebacterium matruchotii, and Neisseria flavescens were common in plaque biofilm of noncarious, healthy, tooth surfaces in subjects with caries. The review illustrates the immense complexity and the diversity of the human oral microbiota of the cariogenic plaque microbiome in ECC, and the daunting prospect of its demystification.
Collapse
Affiliation(s)
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE
| | - Lakshman Perera Samaranayake
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE.,The University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China
| |
Collapse
|
19
|
Polychronakis N, Polyzois G, Lagouvardos P, Andreopoulos A, Ngo HC. Long-term microwaving of denture base materials: effects on dimensional, color and translucency stability. J Appl Oral Sci 2018; 26:e20170536. [PMID: 29898184 PMCID: PMC6010326 DOI: 10.1590/1678-7757-2017-0536] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 02/22/2018] [Indexed: 11/24/2022] Open
Abstract
While the combined effect of microwave irradiation with cleansing solutions on denture base materials has been investigated, the effects of only using microwave irradiation and, more importantly, in a long-term basis, was not studied yet.
Collapse
Affiliation(s)
- Nick Polychronakis
- National and Kapodistrian University of Athens, School of Dentistry, Department of Prosthodontics, Athens, Greece
| | - Gregory Polyzois
- National and Kapodistrian University of Athens, School of Dentistry, Department of Prosthodontics, Athens, Greece
| | - Panagiotis Lagouvardos
- National and Kapodistrian University of Athens, School of Dentistry, Department of Operative Dentistry, Athens, Greece
| | - Andreas Andreopoulos
- National Technical University of Athens, School of Chemical Engineering, Department of Synthesis and Development of Industrial Processes, Athens, Greece
| | - Hien Chi Ngo
- University of Sharjha, College of Dental Medicine, Department of Preventive and Restorative Dentistry, Sharjha, United Arab Emirates
| |
Collapse
|
20
|
Zoidis P, Polychronakis N, Lagouvardos P, Polyzois G, Ngo HC. Evaluation of a Realistic Cleansing Protocol for Preventing Discoloration of Denture Resins. J Prosthodont 2018; 28:e89-e95. [PMID: 29468768 DOI: 10.1111/jopr.12763] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2017] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To evaluate the efficacy of a realistic staining/cleansing protocol for long-term prevention of discoloration of denture base resins. MATERIALS AND METHODS Sixty discs (20 × 2.5 mm) of auto- and heat-polymerizing denture acrylic resins were fabricated following manufacturer's instructions, polished on one side and stored in water (37°C) for 24 hours before they were assigned randomly into 6 groups (3 for each material, n = 10) to receive 220 cycles of three immersion protocols. Group A was immersed in the following baths: (1) filtered coffee at 45°C for 2 minutes, (2) tap water at 24°C for 20 seconds, (3) as bath 1, (4) as bath 2, (5) Corega Extradent cleansing solution at 45°C for 3 minutes, and (6) water at 24°C for 20 seconds. Group B was immersed in the four first baths of group A (without cleansing action) and group C in bath 1 for the cumulative action of 20 cycles (80 minutes in 45°C coffee) and bath 2 for 40 seconds. A noncontact optical interferometric profilometer was used for qualitative evaluation of the specimens and a contact colorimeter to estimate color change values (ΔΕ*ab) at baseline and every 20 cycles in the baths for a total of 220 cycles. Data were statistically analyzed using a 2-way-repeated measures ANOVA with Bonferoni multiple comparisons and trend analysis at α = 0.05 level of significance. RESULTS Data indicated changes in color from 1.7 to 14.2 ΔΕ*ab units. The highest values were related to the number of cycles and group B immersion protocol. Significant differences were found among immersion protocols (p < 0.001) and immersion cycles (p < 0.001) with a significant interaction between protocols and cycles (p < 0.001) but not between denture resins (p = 0.991). CONCLUSION The evaluated protocol A was found effective in preventing color changes in both denture resins even after a long period of action. Protocol C had a much lower staining effect on both resins than protocol B and behaved similarly to protocol A until 140 to 160 cycles. Therefore, it is probably not appropriate for use in short-term color stability experiments.
Collapse
Affiliation(s)
- Panagiotis Zoidis
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos Polychronakis
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Panagiotis Lagouvardos
- Department of Operative Dentistry, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Gregory Polyzois
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjha, Sharjha, United Arab Emirates
| |
Collapse
|
21
|
Wang XY, Yap AUJ, Ngo HC, Chung SM. Environmental degradation of glass-ionomer cements: A depth-sensing microindentation study. J Biomed Mater Res B Appl Biomater 2007; 82:1-6. [PMID: 17034014 DOI: 10.1002/jbm.b.30697] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This study investigated the effects of various environmental conditions on the hardness and elastic modulus of restorative glass-ionomer cements (GICs). Two resin-modified GICs (RMGICs) (Fuji II LC [FL]; Photac-Fil Quick [PQ]) and three highly viscous GICs (HVGICs) (Fuji IX Fast [FN]; KetacMolar [KM]; KetacMolar Quick [KQ]) were evaluated in this study. Specimens were fabricated according to the manufacturers' instructions and stored under a variety of conditions (n = 7): 100% humidity, distilled water, pH 5 demineralization solution, and pH 7 remineralization solution. The hardness and elastic modulus were measured using a depth-sensing microindentation test after 4 weeks. The results were analyzed using the independent samples T-test and ANOVA/Scheffe's post hoc test (p < 0.05). HVGICs showed significantly higher hardness and elastic modulus than RMGICs under all storage conditions. Storage in distilled water significantly increased the hardness and elastic modulus of FN, but decreased that of PQ. All HVGICs and RMGICs stored in remineralization solution had hardness values and elastic moduli comparable to those stored in water. Compared to remineralization solution, demineralization solution had no significant effects on the modified GICs with the exception of KQ. The results suggest that the mechanical properties of glass-ionomer restoratives are material-type and storage condition dependent. Therefore, the clinical selection of a glass-ionomer material should be based on the oral environment to which it will be subjected.
Collapse
Affiliation(s)
- X Y Wang
- Department of Cariology, Endodontology and Operative Dentistry, Peking University School and Hospital of Stomatology, People's Republic of China.
| | | | | | | |
Collapse
|
22
|
Abstract
Clinical Relevance
Modern day glass ionomer restoratives are not significantly weakened by early water exposure, after initial set.
Collapse
Affiliation(s)
- X Y Wang
- Department of Cariology, Endodontology and Operative Dentistry, Peking University School and Hospital of Somatology, PR China.
| | | | | |
Collapse
|
23
|
Abstract
The atraumatic restorative treatment (ART) technique or approach for the restoration of primary and permanent teeth has been widely adopted in, but not limited to, developing countries. However, the requirement for the placement of the restorative materials under often less-than-ideal conditions imposes significant restrictions on their selection; and there have been very few randomized clinical trials or reports comparing different types of restorative materials and treatments. Although conventional glass-ionomer cements (GICs) have relatively poor mechanical and adhesive strengths, their satisfactory biological features, ease of use, and low costs are distinct advantages. Most of the published reports of the clinical performance of the newer, high-strength esthetic conventional GICs specifically marketed for the ART approach have been from short-term studies. Satisfactory clinical performance has been demonstrated for single-surface posterior restorations only, over three years. Findings indicate that further improvements in restorative materials are still required for their use with the ART approach, together with further clinical investigations of the remineralization of shallow open caries lesions, as an alternative to placing definitive restorations.
Collapse
Affiliation(s)
- H K Yip
- Faculty of Dentistry, The University of Hong Kong, SAR, China
| | | | | | | | | |
Collapse
|
24
|
Abstract
OBJECTIVE The objective of this study was to investigate the microtensile bond strength (microTBS) of contemporary glass ionomer cements (GIC) to sound coronal dentin. METHODS Three specimen teeth were prepared for each material tested: Fuji IX GP (GC), ChemFlex (Dentsply) and Ketac-Molar Aplicap (ESPE). GIC buildups were made according to the manufacturers' instructions. After being stored at 37 degrees C, 100% humidity for 24h, the teeth were vertically sectioned into 1x1mm beams for microTBS evaluation. Representative fractured beams were prepared for scanning (SEM) and transmission electron microscopic (TEM) examination. RESULTS Results of the microTBS test were: Fuji IX GP (12.4+/-8.6MPa), ChemFlex (15.0+/-9.3MPa) and Ketac-Molar Aplicap (11.4+/-7.7MPa). One-way ANOVA and a multiple comparison test showed that ChemFlex had a statistically higher microTBS (p<0.05). SEM fractographic analysis showed that the predominant failure modes were interfacial and mixed failures. The GIC side of the fractured beams revealed dehydration cracks, a high level of porosity, and voids with an eggshell-like crust. TEM analysis of the demineralized dentin sides of the fractured beams revealed the presence of an intermediate layer along the GIC-dentin interface. This zone was present on the fractured dentin surface in the case of interfacial failure, and beneath GIC remnants in specimens that exhibited a mixed failure mode. SIGNIFICANCE The findings suggest that the bonding of GIC to dentin is not weak and that the microTBS values probably represent the weak yield strengths of GICs under tension.
Collapse
Affiliation(s)
- H K Yip
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, China.
| | | | | | | | | |
Collapse
|