MTA materials have been shown to have a biocompatible nature and have excellent potential in endodontic use. MTA materials are a refined Portland cement material and the substitution of Portland cement for MTA products is presently discouraged. Existing human studies involving MTA materials are very promising, however, insufficient randomized, double-blind clinical studies of sufficient duration exist involving MTA for all of its clinical indications. Further clinical studies are needed in these areas.

Little has been reported on prognostic indicators in children with chronic fatigue syndrome (CFS). We used interviews with children and parents, a mean of 45.5 months after illness onset, to follow up 25 cases of CFS referred to tertiary paediatric psychiatric clinics. At its worst, the illness had been markedly handicapping (prolonged bed-rest and school absence in two-thirds); mean time out of school was one academic year. Two-thirds, however, had recovered and resumed normal activities--mean duration of illness to recovery/assessment 38 months--and none had developed other medical conditions. Recovery was associated with specific physical triggers to the illness, with start of illness in the autumn school term and with higher socioeconomic status. Severe fatigue states in children can cause serious and longlasting handicap but most children recover.

No abstract

The 30-item General Health Questionnaire (GHQ) has been validated against the criterion of a standardized psychiatric interview in the community. Used for screening, the GHQ misclassified 25 per cent of 105 respondents, being worse for men. Specificity and sensitivity were above .70. The alternative use of the GHQ as an estimator and as an indicator of morbidity in epidemiological surveys is described and discussed.

The first-generation LED-based curing lights in this study required considerably longer exposure durations than the QTH curing light to adequately polymerize a hybrid and a microfill resin composite.