Root canal treatment: single or multiple visits?

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This Cochrane review update included 25 RCTs comparing single verses multiple root canal treatment approaches. They found no evidence to suggest that one treatment regimen is better than the other.

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Burning mouth syndrome: insufficient evidence for effectiveness of current treatments

Depression

This update of a 2005 Cochrane review identified 23 RCTs but a limited number at low risk of bias so there is insufficient evidence to support or refute the use of any interventions in managing burning mouth syndrome.

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Cavity liners for posterior resin based composites?

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This Cochrane review of liners under posterior composite restoration included 8 RCTs identifying little evidence to show that they reduced sensitivity and no evidence of an effect on longevity of restorations.

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Oral care for critically ill ventilated patients

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38 RCTs were included in this Cochrane review update of oral health care in ventilated patients. High quality evidence was found to show that chlorhexidine mouthwash or gel reduces the risk of developing ventilator-associated pneumonia in critically ill patients from 25% to about 19%.

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Endodontic retreatment: Surgical or non-surgical approach?

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20 RCTs are included in this Cochrane review update of endodontic retreatment. The available evidence is of low quality so further research is needed to understand the effects of surgical versus non-surgical approaches, and to determine which surgical procedures provide the best results.

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Obstructive sleep apnoea: insufficient evidence for oral appliances in children

What other effects do nightmares and parasomnias have on sleep that could explain the association with future psychotic symptoms?

This Cochrane review to assess the effects of oral appliances or functional orthopaedic appliances for obstructive sleep apnoea in children only identified a single small trial which provided insufficient evidence to assess effectiveness.

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Distraction osteogenesis or orthognathic surgery for hypoplastic maxilla in cleft lip and palate

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This Cochrane review of maxillary distraction osteogenesis compared to orthognathic surgery for the treatment of hypoplastic maxilla in people with cleft lip and palate only identified a single small trial providing very low quality evidence. Further high quality research is needed.

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Oral Health in nursing homes: education for staff and residents

All the evidence relates to care homes and there is hardly any evidence for any other setting.

9 trials were included in this Cochrane review of oral health education & training for care home residents & staff . These trials provided insufficient evidence from which to draw evidence about the effects of the interventions so more high quality studies are needed.

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Preformed paediatric crowns: little evidence for aesthetic crowns

PMC 2

Only 7 small studies at high risk of bias were available for this review of preformed paediatric aesthetic crowns. They provide little evidence on which to r change of practice particular for posterior teeth where the use of stainless steel crowns is recommended.

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Rubber Dam use may increase restoration survival time

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Only 4 studies were included in the Cochrane review of the impact of rubber dam isolation on dental restorations. The findings suggest that using rubber dam may results in lower failure rates

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