Apical root resorption six and 12 months after initiation of fixed orthodontic appliance therapy.

The low explained variance of identified risk factors for apical root resorption in orthodontic patients suggests effects of parameters related to individual predisposition. Our purpose was to explore this hypothesis. We evaluated standardized periapical radiographs of the maxillary incisors made before treatment (T1) as well as at about six and 12 months after bracket placement (T2 and T3) of 247 patients aged 10.

Apical root resorption 6 months after initiation of fixed orthodontic appliance therapy.

Introduction: Individual predisposition might be a major reason for the observed variation in apical orthodontic root resorption. If so, resorption might be expressed during the initial stages of orthodontic therapy in patients at risk.

Methods: To explore this hypothesis, we evaluated standardized, digitized periapical radiographs made before treatment (T1) and at a mean period of 6.

Class I occlusal composite resin restorations: in vivo post-operative sensitivity, wall adaptation, and microleakage.

Purpose: To investigate the effect of restoration technique and adhesive system on the post-operative sensitivity and marginal adaptation of Class I occlusal composite resin restorations placed in vivo.

Materials And Methods: 48 Class I cavities were restored in vivo according to one of three protocols: (1) Scotchbond Multi-Purpose/P50 placed in increments; (2) Scotchbond Multi-Purpose/P50 placed in bulk, and (3) Clearfil Liner Bond 2/Clearfil Ray Posterior placed in bulk. Post-operative sensitivity and sensitivity on loading were recorded 5-7 weeks after placement of the restorations; the teeth were cautiously extracted, immersed in a dye solution and sectioned.

A radiographic and scanning electron microscopic study of approximal margins of Class II resin composite restorations placed in vivo.

Introduction: Clinical studies on the quality of Class II amalgam and resin composite restorations frequently report defective cervical margins.

Aim: The aim of this study was to evaluate the quality of the approximal margins of Class II resin composite restorations placed in vivo using various application techniques and adhesive systems.

Materials And Methods: Class II restorations were placed in premolar teeth in vivo, using different adhesive systems and application techniques.