Despite these compelling data, it is important to recognize that other studies have failed to demonstrate any association between maternal periodontal disease and preterm birth. In a case control study conducted in London, Davenport et al. examined 236 infants born at <37 weeks’ gestation or <2500 g and compared them to a random sample of 507 control infants born at ≥38 weeks’ gestation and weighing ≥2500 g. The authors found no evidence for an association between delivery of a preterm, low birth weight infant and periodontal disease and somewhat surprisingly, found that deeper mean tooth pocket depths at delivery was associated with a reduction in the risk of delivery of a preterm, low birth weight infant.
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