Shivaughn MarchanUniversity of the West Indies, St. Augustine | UWI · Unit of Restorative Dentistry, School of Dentistry
Shivaughn Marchan
D.D.S. (Hons)(UWI), M.Sc(Lond)
About
50
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Introduction
Publications
Publications (50)
Introduction
Given the worldwide prevalence of tooth wear and wear related to dental erosion a baseline understanding of the knowledge of populations related to erosive wear is required to maximize public health campaigns developed to address this condition. This research investigated the awareness of dental erosion, its causes, and protective fact...
Background: Standard irrigating protocols during root canal treatment call for the use of sodium hypochlorite during chemo-mechanical preparation, followed by final irrigation with ethylenediaminetetraacetic acid (EDTA). This study determined the effectiveness of a new irrigant, Triton (Brasseler, USA), on smear layer removal during root canal trea...
Introduction
Patient safety and the culture of keeping patients safe are not well-researched concepts in dentistry. Research is lacking on patient safety culture in dental teaching hospitals.
Objective
This study examined the knowledge and perceptions of patient safety and patient safety culture in a Caribbean dental school among clinical faculty,...
Introduction: Ingested or aspirated dental burs have been reported in the literature. These events are akin to medical errors that can potentially cause patient morbidity or mortality and must be examined in the larger context of maintaining patient safety in dental settings. Case report: This work presents a case of an ingested bur and a near-miss...
Tooth wear is multi-factorial presenting as a combination of abrasion, attrition, and erosion. This case report represents a case of combined tooth wear in a 46-year-old Indo-Trinidadian male, with a predominant erosive component with both the clinical signs and features of intrinsic and extrinsic erosion. This patient case is unique since the wear...
The aim of this study was to determine if SEM used with imaging software could be used to quantitatively determine the extent of dentine roughness due to tooth-brushing. Flat, polished dentine surfaces were subjected to 25,000 cycles of simulated tooth-brushing at 2 strokes per second with a load of 200g. At the end of the brushing cycle, dentine s...
The concepts of patient safety and patient safety culture are important to prevent unintentional harm to patients while under the care of clinical teams. The problem is the knowledge and perceptions of students, dental faculty, and dental auxiliaries at the research site with respect to patient safety and patient safety culture are not known. The p...
Tooth wear is multi-factorial presenting as a combination of abrasion, attrition, and erosion. This case report represents a case of combined tooth wear in a 46-year-old Indo-Trinidadian male, with a predominant erosive component with both the clinical signs and features of intrinsic and extrinsic erosion. This patient case is unique since the wear...
MARCHAN, S.; RAJHBEHARRYSINGH, A.; BASCOMBE, K. & SMITH, W. Qualitative characterization of the abrasive component of charcoal-containing toothpastes and the on dentin roughness. Int. J. Odontostomat., 17(3):346-355, 2023. ABSTRACT: This study investigated the effect of commercially available whitening toothpastes containing charcoal on dentin. Nin...
This study investigated the effect of commercially available whitening toothpastes containing charcoal on dentin. Nine charcoal-containing toothpastes were compared with 3 whitening toothpastes (positive control) and distilled water (negative control). Periodontally hopeless molars were cleaned and washed and the occlusal table removed to expose de...
Background
The development of competencies in dentistry is a complicated process that calls for the development of not just cognitive and psychomotor abilities but also behaviors and attitudes that change as technical proficiency increases and meaningful patient encounters occur. This study examined the relationship between the number of clinical r...
This study ascertained dental students’ perceived educational experiences and attitudes toward patients with special needs at an English-speaking dental school in the Caribbean. A modified paper-based version of a previously validated survey instrument was used – Dental Students Attitudes’ Towards the Handicapped Scale – on a convenience sample of...
The purpose of this research was to determine the cleaning and whitening ability of two charcoal containing toothpastes compared with baking soda, activated charcoal and a hydrogen peroxide containing whitening toothpaste. Tea-stained enamel/dentin slices were mounted dentin side down in cylinders of auto-polymerizing acrylic and subjected to simul...
Background: This preliminary study aimed to assess the knowledge of clinical dental students and interns on the pathological and
management consequences of cannabis use. Additionally, the study aimed to understand perceptions and current practices of
clinical dental students with respect to offering cessation advice to patients using cannabis.
M...
The purpose of this research was to determine the cleaning and whitening ability of two charcoal containing toothpastes compared with baking soda, activated charcoal and a hydrogen peroxide containing whitening toothpaste. Tea-stained enamel/dentin slices were mounted dentin side down in cylinders of auto-polymerizing acrylic and subjected to simul...
Objectives:
This work attempted to determine the unmet dental treatment needs and self-reported barriers to continued care, in patients with special needs, attending a dental teaching hospital in the English-speaking Caribbean.
Methods:
A chart audit of patients who were planned for comprehensive treatment for the period from August 1, 2015 to Jul...
Background:
The COVID-19 pandemic has affected dentists globally, both financially and mentally. This study aimed to determine the knowledge, attitude, and practices of dentists in Caribbean countries during the COVID-19 pandemic.
Methods:
A non-probability sample was obtained from dentists in more than ten different Caribbean countries. They we...
COVID-19 is a pandemic that has affected health care personnel worldwide. Dentists have a high risk of contracting COVID-19 given the face-to-face contact required in daily interactions with their patients. This study aimed to determine the stressors experienced by academic dentists due to the COVID-19 situation in Trinidad and Jamaica. All academi...
Objective
COVID-19 is a pandemic that has affected health care personnel worldwide. Dentists have a high risk of contracting COVID-19 given the face to face contact required in daily interactions with their patients. This study aimed to determine the stressors experienced by academic dentists due to the COVID-19 situation in Trinidad and Jamaica.
M...
The aim of this research was to determine the color stability of 3 gingival shades of dental restorative materials, Amaris Gingiva, Beautiful II Gingiva, and PermaFlo Pink, compared to a tooth-colored nanohybrid composite, Filtek Z250. Twenty-five specimens of each composite were fabricated in polytetrafluoroethylene-coated stainless steel molds an...
Objective: The aim of this study was to assess the in vitro effect of flavored waters on human tooth enamel using a gravimetric method. Lingual surfaces of lower molars were used to obtain enamel specimens. Material and Methods: Enamel (n=3) was washed and dried, immersed in 6 flavors of locally available flavored sparkling water and assessed using...
Objectives:
This preliminary study seeks to determine the relationship between fractured teeth, restorations, prostheses, and specific dietary practices.
Methodology:
Anonymous questionnaires were randomly distributed to a convenience sample of Trinidadian adults at various locations around the country, after gaining consent. Data were analyze...
![Table 1 ]. A dietary preference for whole](publication/328139980/figure/tbl1/AS:679433820192772@1539001054756/A-dietary-preference-for-whole_Q320.jpg)
Objectives: This preliminary study seeks to determine the relationship between
fractured teeth, restorations, prostheses, and specific dietary practices.
Methodology: Anonymous questionnaires were randomly distributed to a
convenience sample of Trinidadian adults at various locations around the country,
after gaining consent. Data were analyzed usi...
Purpose: This study assessed the roughness of two injection-molded, thermoplastic materials used for denture bases compared with a polyamide material and compression molded Polymethylmethacrylate (PMMA) after the adjustment and re-polishing with either a laboratory protocol or a chair side protocol. Methods: Forty specimens, each of PMMA, Valplast,...
Purpose: This study qualitatively assessed, dentine surfaces that have been treated with two tubule occluding toothpastes (Sensodyne Rapid-Relief and Colgate Pro Relief) and subsequently with a total etch or self- etch DBAs in an attempt to ascertain the effect on dentine surface characterization. Methods: Eight 2 mm dentine discs were obtained fro...
Purpose: This study determined the effect of sonic and ultrasonic instrumentation on the shear bond strengths of Panavia 21, a popular cement for the luting of resin-bonded restorations. Methods: 84 Ni-Cr cylinders were cemented to randomly selected resin composite substrates using Panavia 21 following the manufacturer's instructions. The Ni-Cr-com...
There is no evidence in the literature on the correlation between surface roughness of dental nanocomposites following application of instruments for finishing compared to instruments for both finishing and polishing and how this relates to the final color of the restoration. This study evaluated the correlation between roughness parameters (Ra and...
Purpose: This qualitative study evaluated the surfaces of a nanohybrid, Heritage 7 and a nanofilled composite, Z350 following finishing only or finishing and polishing procedures using scanning electronic microscopy (SEM). Methods: Fourteen (n=14) 8mmX8mmX2mm specimens were fabricated for each tested composite. Two specimens served as unfinished co...
Learning styles of students have been studied extensively. There are at least 16 survey instruments used to determine learning styles of various groups of individuals. One of the recent instruments, popularly known as VARK, has also been employed for such determination of students in healthcare fields. The acronym VARK stands for the 4 general mode...
Aim: This study determined whether prior brushing with desensitizing toothpastes (Sensodyne Rapid Relief and Colgate Pro-Relief) affected the shear bond strengths of composite to dentine surfaces after appropriate use of two different dentine bonding agents (SingleBond and PQ-1).
Materials and Methods: Sixty caries free molar teeth were cleaned, di...
Posterior resin bonded cast metal restorations (adhesive onlays) were used in a variety of clinical scenarios including: management of tooth wear and cracked tooth, as retainers for fixed bridge work, for correction of the occlusal plane and in providing cuspal coverage following endodontic treatment. The mean length in service for the examined onl...
This study evaluated the surface characteristics of three nanoparticle resin composites (Z350, Heritage 7 Nanohybrid, and Ice) using profilometry and scanning electronic microscopy (SEM) after subjecting them to sequential finishing procedures using rigid rotary instruments. Fifteen 8 mm × 8 mm × 2 mm specimens were fabricated for each tested compo...
commercial/research/educational use including without limitation use in instruction at your institution, sending it to specific colleagues that you know, and providing a copy to your institution's administrator. All other uses, reproduction and distribution, including without limitation commercial reprints, selling or licensing copies or access, or...
Video-clips of tooth preparations recorded with a digital head-mounted camera replaced live demonstrations midway in a preclinical operative dentistry course. DVDs of the video-clips were made available to the students for home use.
The aim of this study was to determine whether the use of these video-clips had any impact on students' practical exa...
Clinical Relevance
Reduced polymerization times suggested with newer generation LED-curing lights may not be suitable to ensure sufficient conversion of all types of nanocomposites at depths of 2 mm.
Objective: The primary method of teaching students tooth preparations in a preclinical operative dentistry laboratory course was live demonstrations. In 2007, video-clips of tooth preparations recorded with a digital head-mounted camera replaced live demonstrations midway in the course. DVDs of the video-clips were made available to the students fo...
OBJECTIVE: The purpose of this study was to quantify and compare the mechanical properties of two commercially available nanocomposite restorative materials. MATERIAL AND METHODS: Specimens of two nanocomposites, Z350 TM and Grandio TM , were polymerized with a LED light for 20 seconds and subjected to mechanical tests. Properties tested included:...
Objectives: To investigate the effectiveness of polymerization of various cuing regimens on two nanocomposite resin restorative materials, Z350 and Grandio, cured with Quartz-Tungsen-Halogen and LED lights by utilizing microhardness measurements. Methods: Five disc shaped specimens (8 mm in diameter and 2 mm thick) each of two nanocomposite resin m...
Objective. This in vitro study uses measurements of fracture resistance to compare maxillary premolars restored with the bonded amalgam technique using a new resin luting cement, glass ionomer, and resin-modified glass ionomer as the bonding agents. Materials. Eighty-five sound maxillary premolars were selected and randomly assigned to one of five...
Non-carious cervical lesions (NCCLs) are often encountered in clinical practice and their aetiology attributed to toothbrush abrasion, erosion and tooth flexure. This paper aims to determine the prevalence and severity of NCCLs in a sample of patients attending a university clinic in Trinidad and to investigate the relationship with medical and den...
To determine the prevalence of tooth surface loss (TSL) in a sample of subjects attending a university dental clinic in Trinidad and to investigate the relationship to tooth brushing, medical history, parafunction and dietary habits.
Tooth surface loss was measured clinically by the index used in the 1998 UK, Adult Dental Health Survey.
Trinidad, W...
Retention of crowns has been shown to be inversely proportional to taper. The objective of this study was to compare the abutment taper of teeth prepared for full veneer crowns by students at the UWI School of Dentistry with those of other dental schools. Twenty five dies were scanned by a Co-ordinate Measuring Machine (CMM) and the mean taper and...
The retention of zirconia-based ceramic posts (CosmoPost system) luted with glass ionomer and resin cements was evaluated. Thirty-two extracted, caries-free, unrestored teeth were selected and stored in chlorhexidine and water solution. The teeth were endodontically treated and randomly assigned to two groups (n=16). Each tooth was decoronated and...
The aims of this study were to describe levels of self-rated competency of dental graduates from the University of the West Indies (UWI) and to investigate relationships with gender and the effect of curriculum change. A thirty-two item self-reported postal questionnaire was sent to UWI dental alumni (1994-2002). The questionnaire included twenty-e...
OBJETIVO: A finalidade deste estudo foi quantificar e comparar as propriedades mecanicas de dois materiais restauradores nanocompositos disponiveis comercialmente. MATERIAL E METODO: Especimes de dois nanocompositos, Z350TM e GrandioTM, foram polimerizados com luz LED por 30 segundos e submetidos a testes mecanicos. As propriedades testadas incluir...
Questions
Questions (2)
I just had an email from the European Society of Medicine asking for a contribution to the journal Medical Research Archives. There is a similar journal on Cabell's published by KEI publishers, however I am unsure if this is the same journal. The European Society of Medicine from the website seems legit. Can anyone offer their personal experiences with the European Society of Medicine?
Using ovate pontics extending into the extraction socket, as part of provisional bridgework, opposed to normal healing after extraction.
