Avulsion is a serious injury which can cause damage to some or all of the dental and surrounding tissues. This study examined the profiles of teeth showing inflammatory resorption, in terms of time prior to reimplantation, contamination, pulp extirpation time and period of splinting and compared them to teeth without resorption. There were a total of 71 children in the present study (mean age 9.8 years, range 6-16 years) with a total of 84 reimplanted teeth. Inflammatory resorption was present in 22 teeth. There was a significant relationship between the presence of inflammatory resorption and the time the teeth were dry prior to reimplantation, with a lesser effect for total delay time. There were slightly later pulp extirpation times for teeth with inflammatory resorption, with median delays of 16 and 11 days respectively and increased inflammatory resorption in teeth extirpated at 20 days or later. Replacement resorption was present in 40 teeth. There was a significantly longer splinting time in teeth with replacement resorption and more resorption in teeth splinted for longer than 10 days. It was concluded that pulp extirpation time was not critical unless the delay exceeded 20 days and that splinting time should not exceed 10 days.

It is generally agreed that persons suffering from haemophilia from a priority group for dental care. The present study compares the prevalence of dental caries in haemophilic children in Northern Ireland with the reported values for similarly aged children in the population. The prevalence of caries experience and of untreated caries were low in the haemophiliacs in both the primary and permanent dentitions. No teeth had been extracted due to caries and a high level of fluoride usage was claimed. The dental care of these patients is carried out at the regional treatment centre and forms an integral part of their medical care.

Both total extra-oral time and time stored dry are important factors for the onset of resorption in replanted avulsed teeth in children.

This study reports the incidence of the various types of cleft lip and/or palate drawn from a regional database of all affected children born in Northern Ireland during the period 1980–1990. The incidence of these anomalies was 1·28 per 1000 live births (1:781). Fifty-three per cent of clefts involved the secondary palate only, 16 per cent the primary palate only, 26 per cent involved both primary and secondary palate, and 5 per cent were unconnected. Overall, more males than females were affected and there were more males than females in the group having complete clefts. Separate clefts of lip and palate occurred exclusively in males with only one exception. Unilateral clefts were more common on the left side. Within the group showing complete unilateral cleft of the primary and secondary palate, left-sided clefts were more commonly male, right-sided clefts were more commonly female. There were no statistically significant sex differences between sides in the unilateral primary palate cleft group.