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We show new limits on the efficiency of using current techniques to make exact probabilis-tic inference for large classes of natural problems. In particular we show new lower bounds on knowledge compilation to SDD and DNNF forms. We give strong lower bounds on the complexity of SDD representations by relating SDD size to best-partition communication(More)
A technique which uses a natural tooth pontic to replace a periodontally compromised tooth is described. Following extraction and root resection of a maxillary central incisor, the crown was bonded to the adjacent teeth using acid-etched composite resin located in proximal cavity preparations. Some advantages of the technique are discussed.
This study investigated the oral status and dental complications in patients with both anorexia and bulimia nervosa. Results revealed that prolonged periods of dietary restraint in anorexic patients did not result in changes to bacteria associated in dental caries. Furthermore, patients did not have lower decay rates or salivary flow but did have more(More)
This study investigated anterior dental trauma presenting after-hours in Newcastle and western Sydney. During the four-year period 1983-1986, all patients presenting with anterior dental injuries to the Royal Newcastle Hospital (n = 382) or Westmead Hospital (n = 362) on week nights, weekends or public holidays were studied. In both areas, upper central(More)
Several studies have examined the relationship between anorexia nervosa and oral status. However, none has used control subjects. Furthermore, none has examined bacteriological data in these subjects to determine whether dietary restrictions, particularly of carbohydrates, change the levels of Streptococcus mutans and Lactobacillus species. Fifteen female(More)
This study investigated the occurrence, causes and types of anterior dental trauma treated outside normal clinic and practice hours in Newcastle, Australia. During a 2 1/2-yr period, 233 patients presented for treatment of traumatic injuries to anterior teeth on week nights, weekends and public holidays. The highest occurrence of trauma was in the 18 to 23(More)
Previous studies have shown that metronidazole is effective in the treatment of subgingival microflora associated with destructive periodontitis. The aim of this study was to determine whether tinidazole, a close analogue of metronidazole, would reach sufficient concentrations in serum, gingival crevicular fluid, and gingival tissue, to inhibit putative(More)
The efficacy of a non-steroidal anti-inflammatory agent, ibuprofen, was evaluated in pain control following periodontal surgery. This type of agent acts peripherally by inhibiting the release of prostaglandins and minimizing the local inflammatory response. Thus there may be an advantage in pre-treatment administration of the drug so as to delay or even(More)
In the last lecture we examined relativization. We found that a common method (diagonalization) for proving non-inclusions between classes of problems was, alone, insufficient to settle the P versus N P problem. This was due to the existence of two orcales: one for which P = N P and another for which P = N P. Therefore, in our search for a solution, we must(More)