Influence of bimaxillary protrusion on the perception of smile esthetics.

Objectives: To evaluate the impact of bimaxillary protrusion on smile esthetics as perceived by dental professionals and laypersons.

Methods: One hundred and fifty evaluators, equally distributed into their respective panels (orthodontists, general dentists, and laypersons), participated in this cross-sectional study conducted in April to December 2012 in Riyadh, Saudi Arabia. The patient sample consisted of 14 female patients divided equally into 2 groups: bimaxillary protrusion patients, and patients who have had 4-premolar extraction treatment.

Bonded orthodontic retainers: a comparison of initial bond strength of different wire-and-composite combinations.

Objectives: The aim of this in-vitro study was to evaluate initial bond strength in Newton (N) of two types of wires (Ortho- Flextech chain and Penta-One Coaxial wire 0.0215") bonded with three lingual retainer composites (FlowTain, Light Cure Retainer and Transbond LR).

Materials And Methods: One hundred and eighty sound, extracted human premolars were randomly divided into six equal groups.