Radiographic evaluation of apical root resorption with 2 different types of edgewise appliances. Results of a randomized clinical trial.

The purpose of this paper was to compare radiographically the prevalence and degree of apical root resorption after treatment with a fully programmed edgewise appliance (FPA) and a partly programmed edgewise appliance (PPA) in a randomized multipractice clinical trial. Two groups of patients with Class II malocclusions were treated orthodontically. The type of treatment was randomly assigned by a computer program.

Assessment of apical root resorption using digital reconstruction.

Objectives: To assess the in vitro and in vivo accuracy of a mathematical computer-based reconstruction of two images that are not taken with the same recording geometry for the measurement of apical root resorption following orthodontic treatment.

Methods: A gold standard for root resorption in vitro was developed from 10 extracted upper central incisors using calipers. Radiographs made with five different projection angles were reconstructed mathematically by two observers.

Air humidity: a detrimental factor in dentine adhesion.

Successful dentine adhesion may be negatively influenced by intrinsic and extrinsic dentine wetness. Testing the influence of high humidity levels during the application of bonding systems is therefore relevant. It was the aim of this study to investigate in vitro the sensitivity to air humidity of the dentine bond strength for some commercially available bonding systems.

Esthetic veneering of amalgam restorations with composite resin--combining the best of both worlds?

Patients are becoming more and more aware of the esthetic alternatives to dental amalgam and are asking dentists to offer solutions that are more esthetically pleasing. However, the difficulties in inserting clinically durable composite resin restorations in the posterior area are numerous. With the high-copper amalgam systems, the dental profession has had an excellent restorative material.