Histomorphometric evaluation of a dual acid-etched vs. a chemically modified hydrophilic dual acid-etched implant surface. An experimental study in dogs.

Objective: The aim of this preclinical in vivo study was to compare histologically and histomorphometrically osseointegration of dual acid-etched vs. hydrophilic implants.

Material And Methods: Two pairs of implants (Neodent, Curitiba, Brazil), with same macrogeometry but different surface technology (i) dual acid-etched surface (SAE) treatment with hydrochloric and sulfuric acid followed by microwave treatment and insertion in isotonic saline solution to increase hydrophilicity (SAE-HD) (test, n = 12); (ii) dual SAE (control, n = 12) were installed bilaterally in the proximal tibia of six beagle dogs.

Primary amelanotic mucosal melanoma of the oronasal region: report of two new cases and literature review.

Primary amelanotic mucosal melanoma is a rare entity with challenging histopathological features. Because these tumors are thought to be biologically more aggressive, they have a poorer prognosis than that of pigmented melanomas. In this work, we present a literature review about the clinical, histopathological, and immunohistochemical features of primary amelanotic mucosal melanoma of the oronasal region and report two new cases.

Oral Manifestations of Secondary Syphilis.

Known as "the great imitator," secondary syphilis may clinically manifest itself in myriad ways, involving different organs including the oral mucosa, and mimicking, both clinically and histologically, several diseases, thereby making diagnosis a challenge for clinicians. We highlight the clinical aspects of oral manifestation in 7 patients with secondary syphilis. Clinicians should consider secondary syphilis in the differential diagnosis of ulcerative and/or white oral lesions.

Drilling dimension effects in early stages of osseointegration and implant stability in a canine model.

Background: This study histologically evaluated two implant designs: a classic thread design versus another specifically designed for healing chamber formation placed with two drilling protocols.

Study Design: Forty dental implants (4.1 mm diameter) with two different macrogeometries were inserted in the tibia of 10 Beagle dogs, and maximum insertion torque was recorded.

Treatment of temporomandibular joint ankylosis by posterior border of mandibular ramus osteotomy.

Temporomandibular joint (TMJ) ankylosis (TMJA) is an anatomic and functional alteration of the TMJ surfaces, caused by the fusion of these surfaces by either bone or fibrous tissue. Several techniques are used for the treatment of TMJA. The following case report describes a 5-year-old boy who was diagnosed with TMJA.

The approach of ameloblastoma of the mandible: a case treated by hyperbaric oxygen therapy and bone graft reconstruction.

Background: Reconstruction of mandibular defects after tumor resection is a challenge to the head and neck surgeon because of associated functional and esthetic problems. The intention of mandibular reconstructive surgery is to achieve maximum possible functionality, which means the restoration of masticatory function and speech with a good esthetic result. Hyperbaric oxygen therapy (HBO) is already a well-accepted adjunct in the treatment of extensive bone defects.

Endodontic re-treatment associated with the elimination of amalgam root-end filling through sinus tracts: a report of two cases.

Two patients presented with complaints of recurrent drainage of purulent exudate from sinus tracts, inflammation and pain after endodontic re-treatment of the maxillary left (Case 1) and right (Case 2) lateral incisors. The periapical lesions persisted after apical curettage, apicectomy and root-end filling with silver amalgam. Radiographic examination exposed the poor quality of the endodontic treatments and the silver amalgam root-end fillings, which were associated with periapical radiolucent areas in both teeth.