Derek Richards

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Derek Richards is the Director of the Centre for Evidence-based Dentistry, Editor of the Evidence-based Dentistry Journal, Consultant in Dental Public Health with Forth Valley Health Board and Honorary Senior Lecturer at Dundee & Glasgow Dental Schools. He helped to establish both the Centre for Evidence-based Dentistry and the Evidence-based Dentistry Journal. He has been involved with teaching EBD and a wide range of evidence-based initiatives both nationally and internationally since 1994.

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Periodontal regeneration therapies: Are benefits long-term?

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This review of periodontal regeneration therapies included 52 trials. While the results suggest some statistically significant improvements they may not be clinically important. There is also limited data for outcomes longer than 12 months.

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Pulp capping carious exposures in adults: calcium hydroxide or MTA?

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This small but well conducted RCT compares the effectiveness of MTA and calcium hydroxide for direct pulp capping material in adult molars with carious pulpal exposure finding better performance for MTA at 3 years.

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Toothbrushing: Are three heads better than one?

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This review of the effectiveness of 3-headed toothbrushes included 15 studies describing 18 comparisons. The quality of the available evidence was low an no differences were seen with self-performed brushing but a benefit was suggested for plaque removal for care-dependent individuals.

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Sexual behaviours and oral cancer risk

The treatment effects seemed more pronounced in women, young people and first attempters of suicide.

20 studies reporting 21 data sets were included in this review of the association of sexual behaviours and oral and oropharyngeal cancers. The review suggests that some sexual behaviours increase risk but the quality of the evidence is limited and quantitative estimates of the strength of these associations are not reliable.

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Hawley appliances for orthodontic retention?

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10 trials were included in this review of the effectiveness of Hawley retainer following orthodontic treatment providing low quality evidence that performance was similar to other retainers.

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Temporomandibular disorders: no role for dental occlusion in the pathophysiology

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This review of the association between temporomandibular disorders and dental occlusion included 25 observational studies. No consistent association was found.

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Periodontitis: risk increased by poor oral hygiene

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50 observational studies were included in this review of the effect of oral hygiene on periodontitis. The data suggests that poor oral hygiene increases the risk of periodontitis by around two- to five-fold compared with good OH. However the quality of the data is considered to be of low quality.

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Removable orthodontic appliances: compliance suboptimal

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24 studies were included in this review of compliance with removable orthodontic appliance treatment. Objectively measured wear was considerably lower than stipulated wear time among all appliance types in the included studies.

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Removable partial dentures and quality of life

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This review of the effect of removable partial dentures (RPDs) on quality of life included 16 studies mainly retrospective and cross-sectional providing limited evidence of any association association between patient-reported QoL or satisfaction with technical or biological parameters of RPDs.

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Tooth socket preservation using autologous platelet concentrates

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33 studies were included in this review of the effectiveness of autologous platelet concentrates (APCs) in the preservation of fresh extraction sockets. The studies were mainly small and of less than 6 months duration suggesting a positive effect.

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