The quantitative and qualitative analysis of the craniofacial skeleton of mice lacking the IGF-I gene.

Insulin-like growth factors are mediators of growth hormone and are believed to also stimulate growth independently. Insulin-like growth factor I (IGF-I) null mutant mice exhibit a lower rate of skeletal growth compared with their wild-type (control) littermates. Although their general body dimensions seem proportionate, their heads appear shortened with a blunt nose compared with the controls.

Effect of evaporation and mixing technique on die spacer thickness: a preliminary study.

Statement Of Problem: Casting relief is required for proper seating of castings to allow for luting agent thickness. The application of die spacer to the die is the most common method of obtaining casting relief. Die spacer film thicknesses that are outside the ideal range of 25 to 40 microm can cause clinical problems.

Dimensional accuracy of castings produced with ringless and metal ring investment systems.

Statement Of Problem: The ringless casting procedure is in use in clinical dentistry, although there is no adequate scientific data to support its use.

Purpose: This study compared the vertical margin accuracy of lost wax castings produced with the conventional casting technique using a metal ring and a technique that uses a ringless system.

Material And Methods: From copings fabricated on a metal die, 30 castings were produced from a high palladium alloy for metal ceramic restorations (Argedent).

Theoretical cantilever lengths versus clinical variables in fifty-five clinical cases.

Statement Of Problem: Cantilever loading increases loads distributed to implants, potentially causing biomechanical complications. The implemented length is often less than what is considered to be optimal.

Purpose: This study investigated the effects of clinical variables on predicted cantilever lengths.

Comparison of numeric techniques in the analysis of cleft palate dental arch form change.

Objective: Quantitative descriptions of form (size and shape) changes are significant to the understanding of the development, treatment planning, and prognosis of patients born with cleft lip and palate. This study compared the results of traditional dental arch form change measurements, such as width, depth, perimeter, and area, with four numeric methods: finite element scaling analysis, macroelement method, Euclidean distance matrix analysis, and conventional least-squares and resistant-fit theta rho Procrustes analyses.

Design: Using tooth cusp landmarks on maxillary study casts, form change measurements of a male with complete bilateral cleft lip and palate at ages 2, 5, and 6 years were made comparing each age to the next older.