Research Papers/Topics in Dentistry And Dental Technology

Is the longevity of resin-modifed glassionomer cement (RM-GIC) restorations in primary teeth greater than that with compomers? [October 12, 2014]

Search result: Only three clinical studies were found. Clinical outcomes: The results indicate no difference in the longevity between both types of materials. State of evidence and recommendations: The quality of the existing evidence requires further assessment. [‘Preliminary Systematic Literature Searches’ are based on SYSTEM’s periodic systematic searches of the dental literature and provide first overviews over existing clinical evidence but are limited in the number of databases�...

Have conventional glassionomer cements (GIC) a higher cariostatic effect than composite resins? [October 12, 2014]

Search result: Seven clinical studies to topics concerning orthodontic bonding, root- and tooth restorations were found. Clinical outcomes: The results indicate a higher cariostatic effect of GIC for orthodontic bonding and tooth restorations in permanent teeth. No difference was found for tooth restorations in primary teeth when compared to fluoride containing composite and root restorations. State of evidence and recommendations: The quality of the existing evidence requires further asses...

How differ coated high-viscosity GIC restorations from noncoated in clinically relevant aspects?[October 10, 2014]

Search result: One prospective clinical controlled trial was found. Clinical outcomes: The results indicate that coating increases wear resistance. State of evidence and recommendations: More clinical (prospective) randomised control trials (RCT) are needed to confirm the laboratory results. [‘Preliminary Systematic Literature Searches’ are based on SYSTEM’s periodic systematic searches of the dental literature and provide first overviews over existing clinical evidence but are limit...

Have conventional glassionomer cements (GIC) a higher cariostatic effect than compomers? [October 14, 2014]

Search result: There is a lack of clinical studies to this topic: Only three clinical trials were found and traced.  Clinical outcomes: The results are conflicting or suggest no difference between conventional GIC and Compomers in regard to their anticariogenic effects. State of evidence and recommendations: The quality of the existing evidence requires further assessment. [‘Preliminary Systematic Literature Searches’ are based on SYSTEM’s periodic systematic searches of the dental ...

Have resin-modified glassionomer cements (RM-GIC) a higher cariostatic effect than compomers? [October 14, 2014]

Search result: Twelve clinical trials were found and traced. Clinical outcomes: The overall results suggest no difference between RM-GIC and Compomers in regard to their anticariogenic effects. State of evidence and recommendations: The quality of the existing evidence requires further assessment. [‘Preliminary Systematic Literature Searches’ are based on SYSTEM’s periodic systematic searches of the dental literature and provide first overviews over existing clinical evidence but are...

Have glass-ionomer cements (GIC) a higher antibacterial effect than composite resins? [October 14, 2014]

Search result: One clinical trial was found and traced concerning resin-modified GIC (RM-GIC). The material was Fuji II LC (compared to: Tetric Flow and Helioseal F). No trials were identified comparing conventional GIC (C-GIC) with composite resin.  Clinical outcomes: The overall results suggest a higher antibacterial effect for resin-modified GIC (RM-GIC) up to 6 months. State of evidence and recommendations: All evidence from one clinical, controlled trial, only. This is still an emerg...

The Systematic Review initiative for Evidence-based Minimum Intervention in Dentistry (SYSTEM): activities 2014/15

In 2012, the Systematic Review initiative for Evidence-based Minimum Intervention in Dentistry (SYSTEM) has been accepted as research entity with programme status within the Faculty of Health Science, University of the Witwatersrand, Johannesburg, South Africa. The aim of the initiative is to establish an applicable evidence-based body of clinical knowledge in the field of Minimum Intervention (MI) dentistry. This article provides a brief overview over SYSTEM’s activities during 2014/15.

Caries-preventive effect of high-viscosity glass ionomer and resinbased fissure sealants on permanent teeth: a systematic review of clinical trials [protocol]

The evidence for the efficacy and cost-effectiveness of sealants in reducing occlusal caries in molar teeth has been highlighted in a number of articles in highly rated journals. The most commonly used sealant material is resin composite. Its caries-preventive effect relies on the sealing of pits and fissures through micro-retention, created through tags after enamel acid etching. However, these are easily destroyed by saliva contamination, which reduces micro-retention and consequently, ...

Do laboratory results concerning glass-ionomers versus amalgam indicate similar effect than that of clinical controlled trials? [protocol]

A large percentage of evidence concerning dental interventions is based on laboratory research. The aim of this metaepidemiological study is to establish whether valid clinical inferences and recommendations can be made on basis of the current laboratory evidence concerning high-viscosity glass-ionomer cement (HVGICs) versus amalgam as materials for placing restorations in permanent posterior teeth for daily dental practice. HVGICs may offer a suitable clinical alternative to amalgam for ...

The Systematic Review initiative for Evidence-based Minimum Intervention in Dentistry (SYSTEM): activities 2013/14

In 2012, the Systematic Review initiative for Evidence-based Minimum Intervention in Dentistry (SYSTEM) has been accepted as research entity with programme status within the Faculty of Health Science, University of the Witwatersrand, Johannesburg, South Africa. The aim of the initiative is to establish an applicable evidence-based body of clinical knowledge in the field of Minimum Intervention (MI) dentistry. This article provides a brief overview over SYSTEM’s activities during 2013/14.

SYSTEM Research Note on: How should competing clinical interventions be compared in dentistry? – A simulation-based investigation

Background: Inferences based on naïve-indirect comparisons, particularly concerning the effectiveness of different types of tooth restorations, are still relatively common in reviews of the dental literature: Thus, the aim of this study was to illustrate, by use of a simple trial simulation, the potential impact of naïve-indirect comparison on effect estimates. Methods: Clinical trials were simulated by assuming comparisons of two interventions with dichotomous outcomes. The treatment ef...

Failure rate of direct tooth restorations placed with conventional glass-ionomers compared to composite [protocol]

This protocol has been registered with the International Prospective Register for Systematic Reviews (PROSPERO) on the 10 July 2012 under registration number CRD42013006487 (Available online from http://www.crd.york.ac.uk/prospero/display_record.asp?ID=CRD42013006487). REVIEW QUESTION: Do conventional glass-ionomer restorations, in patients with single and/or multi-surface cavities in posterior permanent teeth, have a higher failure rate than direct composite resin restorations? SYSTEMATIC...

Evidence Base of Caries Management by Risk Assessment (CAMBRA)

597 articles were reviewed, 426 did not comply with the exclusion criteria and were rejected. 171 articles were accepted as evidence. The results show an emerging evidence base for CAMBRA in support for the viability of assessing the risk factors: Saliva flow; Salivary counts of S. mutans and Lactobacilli; Frequency of fermentable carbohydrate intake; past caries experience and for the use of Dental chewing gum; Chlorhexidine; Topical fluoride; Glass ionomers; CPP/ACP for caries management.

Dental Chewing Gum and Caries - A Systematic Review

There is good evidence that supports the use of sugarless dental chewing gum, containing Xylitol and/or Sorbitol, for caries reduction, particularly on the occlusal tooth surface. Gum chewing varied between 2-7x daily after meals for 5-20 min. There seemed to be no difference between Xylitol-, Sorbitol and Xylitol/Sorbitol Chewing Gum. Two trials showed no significant anti- caries effect as compared to the control. However, one trial (in situ) used an intensive chewing regimen of 5x daily...

Clinical oral care in Zonkizizwe: The ART approach as model for treatment provision on primary care level

Zonkizizwe (Zulu; Eng: All Nations) is one of many informal settlements located South East of Johannesburg. Zonkizizwe has been founded in 1989. Today, it has an estimated population of 150 000 people. The majority of its residents are Zulu speaking people who migrated from KwaZulu/Natal to the metropolitan area of Johannesburg. The main forms of housing in Zonkizizwe are informal dwellings. However, people have access to electricity, sewerage system with outside toilets and tap water i...


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