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X linked hypohidrotic ectodermal dysplasia was studied in the dentition of both affected males and carrier females. Hypodontia was more severe in males than females and there were differences in the pattern of tooth absence between the sexes. Abnormal crown form, with the maximum diameter of the teeth being apically displaced, was noted particulady in the anterior teeth. Taurodontism was commonly seen radiographicaily.

This paper discusses the range of recurrent oral ulceration which affects the oral mucosa. Types of ulceration covered in this paper include traumatic, infective, aphthous, ulceration related to the oral dermatoses, drug-induced, ulceration as a manifestation of systemic disease and ulceration indicating malignancy. Aspects of the aetiology, diagnosis and management of common oral recurrent ulcerative conditions are reviewed from a clinical perspective as an aid to practising dentists.Keywords: Ulceration, aetiology, diagnosis, clinical features, histopathological features, treatment.Abbreviations and acronyms: ANUG = acute necrotizing ulcerative gingivitis; HHV-1 = human herpes virus-1; LE = lupus erythematous; MMP = mucous membrane pemphigoid; RAU = recurrent aphthous ulceration.

This editorial reviews the history of the classification of amelogenesis imperfecta (Al). The limitations of the existing classification systems are discussed. An alternative classification is proposed based upon the molecular defect, biochemical result, mode of inheritance and phenotype in the family involved. While not all of the criteria for the proposed classification can yet be addressed, this scheme is proposed for future classification of At cases and families.