Validity and reliability in quantitative research were discussed in the November and December 2004 issues of Paediatric Nursing. Judging the quality of qualitative research requires consideration of different factors which are discussed this month. Rather than validity and reliability, qualitative researchers talk about rigour. Rigour relates to the overall planning and implementation of the re...

Subjects, methods, and results I assessed 22 infants and children with fractures (mean age 6 months) who were the subjects of proceedings for child protection (19) or whose parents had been charged with causing their injuries (three). I scrutinised the medical notes, court papers, and x ray films for evidence of metabolic bone disease, particularly osteogenesis imperfecta (using the classificat...

INTRODUCTION We have previously shown that the p38 gene is highly expressed in odontoblasts during active primary dentinogenesis, but is drastically down-regulated as cells become quiescent in secondary dentinogenesis. Based on these observations, we hypothesized that p38 expression might be upregulated, and the protein activated by phosphorylation, when odontoblasts are stimulated such as duri...

Bone and dentin are mineralized extracellular matrices produced by osteoblasts and odontoblasts, respectively, and their major organic portion is type I collagen. Dentinogenesis Imperfecta (DGI) is one of the most common clinically- and genetically-based disturbances of dentin formation, causing irreversible dentin defects. Among several types of DGI, patients with DGI type II exhibit opalescen...

Osteogenesis imperfecta (OI) is a heterogeneous group of disorders of connective tissue, caused mainly by mutations in the collagen I genes (COL1A1 and COL1A2). Dentinogenesis imperfecta (DGI) and other dental aberrations are common features of OI. We investigated the association between collagen I mutations and DGI, taurodontism, and retention of permanent second molars in a retrospective coho...

Osteogenesis imperfecta (OI) is a heterogeneous rare connective tissue disorder commonly caused by mutations in the collagen type 1 gene. It is a worldwide extensive disorder regardless of age, gender or ethnic group for a children and adults. Typical clinical features are brittle bone, high frequency of fractures and bone deformities. The other observed signs are blue sclera, dentinogenesis im...