Effect of Ferrule Location with Varying Heights on Fracture Resistance and Failure Mode of Restored Endodontically Treated Maxillary Incisors.

Purpose: To investigate the effect of the location of a partial ferrule on 2 walls and the influence of ferrule height variations on remaining walls, fracture resistance, and failure mode of maxillary incisors endodontically treated and restored with fiber posts.

Materials And Methods: Sixty intact human maxillary central incisors were divided into 6 groups (n = 10): no ferrule (NF), 2-mm ferrule (CF2), absence of lingual wall and 1 proximal wall with remaining walls' height, 1 mm (IF1), 2 mm (IF2), 3 mm (IF3), and 4 mm (IF4). They were restored with a fiberglass post and composite resin core.

Treatment of merkel cell carcinoma.

Purpose: The purpose of this study was to evaluate the treatment of Merkel cell carcinoma.

Materials And Methods: We reviewed 85 cases of Merkel cell carcinoma. There were 68 males and 17 females.