Root canal posts: review suggests no difference in root fracture incidence between metal-and fibre posts


This review compared root fracture rates of metal and fibre root canal posts and found not difference. While 14 studies were included only 7 were randomised trials and all were of low quality so higher quality studies are needed.

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Mandibular advancement devices: Trial suggests they can benefit patients with mild obstructive sleep apnoea-hypopnoea


Obstructive sleep apnoea-hypopnoea (OSAH) affects 2-7% of adults. This trial compared 3 mandibular advancement devices with no treatment for mild disease and found benefits over the short term for a range of outcomes including Apnoea-Hypopnoea Index, the Epworth Sleepiness Scale and cost-effectiveness.

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Orthodontic aligners: little evidence to assess their effectiveness

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The use of clear orthodontic aligners is increasing, despite searching a wide range of databases this review only identified a limited number of small studies. The quality of the studies was not sufficient to draw any evidence-based decisions on the effectiveness of orthodontic aligners so better quality studies are needed.

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Primary tooth trauma may be associated with developmental disorders in the permanent successors suggests review


Trauma to primary teeth is relatively common. As the developing permanent teeth are closely related and trauma to primary teeth could adversely affect the permanent successor. This review looked for studies to assess this relationship. Only 17 low quality studies were identified and while they suggest a relationship the low quality means that the findings should be interpreted with caution.

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Lidocaine: trial suggests that buffering may not improve success of inferior alveolar nerve block


A 2010 Cochrane review that was not able to include any dental studies did find that buffering lidocaine decreased pain on injection and augmented patient comfort and satisfaction. This new dental trial included 80 patients with symptomatic irreversible pulpitis but found no significant difference with success rates with buffered lidocaine.

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Root caries: review suggests potential benefits from 5000ppm fluoride, chlorhexidine and silver diamine varnishes


The prevalence of root caries is expected to risk and this review looked at a range of agents for non-invasive management. While 30 studies were identified they consider a large number of agents. While the review suggested that 5000ppm fluoride dentifrice was effective the number of available trials for this and the other agent was small and of limited quality.

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Caries: review suggests complete removal not best approach


This review of caries excavation strategies identified 28 studies including 19 RCTs. None were considered to be at low risk of bias . The results suggest that not attempting to remove all softened or stainable dentine could reduce the risk of complications

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Caries experience: risk higher in those from lower socioeconomic positions


This review included 155 observational studies, which although of low quality consistently found caries parameters to be significantly higher in those from lower socioeconomic positions

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Mouthrinses: trial finds alcohol-free rinses have similar effects on plaque levels to those containing alcohol


This equivalence trial compared two alcohol free mouthrinses with an alcohol containing rinse and toothbrushing alone. At 8 weeks all 4 interventions reduced interproximal bleeding with plaque reductions being significantly greater in the mouthrinse groups. There was more staining in the 3 mouthrinse groups.

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Dental implants: only low quality evidence for implants placed in maxillary tuberosity


This review looks at dental implants placed in the maxillary tuberosity only 5 low quality studies involving 113 patients were found in total. While good survival rates were found these should be interpreted with caution.

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