Root malformation associated with a cervical mineralized diaphragm--a distinct form of tooth abnormality?

Objective: Deviations in length and shape of tooth roots result from hard tissue resorption or occur as a developmental disorder. The purpose of this report is to present a type of root malformation which seems to have gone unreported so far.

Study Design: Two patients showing severely dysplastic roots of all permanent first molars were evaluated using radiography, histology as well as scanning and transmission electron microscopy.

A longitudinal cephalometric study from age 5 to 18 years on individuals with complete bilateral cleft lip and palate.

Development of the facial profile between the age of 5 years and the end of pubertal growth in patients with complete bilateral cleft lip and palate was studied by means of cephalometric radiographs obtained at the age of 5, 10, and 15 years as well as at the end of the growth period. All 29 patients had been treated according to the same plan and operated on by the same surgeon.Values for the ANB angle are typically very high in 5-year-old children and then decrease to values corresponding to those of the general population by the end of the pubertal growth period.