Influence of cavity preparation technique (rotary vs. ultrasonic) on microleakage and marginal fit of six end-root filling materials.

Objectives: To evaluate in vitro the effect of cavity preparation with microburs and diamond-coated ultrasonic tips on the microleakage and marginal fit of six end-root filling materials. STUDY DESIGN. The following materials were assessed: amalgam (Amalcap), zinc oxide eugenol (IRM), glass ionomer (Vitrebond), compomer (Cavalite), mineral particle aggregate (MTA) and composite (Clearfil).

Juvenile ossifying fibroma: a case study.

We present the case of an 8-year-old patient with a juvenile ossifying fibroma in the right mandibular angle and a radicular cyst in the left mandibular angle, which produced a major swelling at the level of the mandibular angles and prevented the correct eruption of the lower first molars. After the clinical and radiological (panoramic X-ray and dental scan of the mandible), the corresponding surgical treatment (cystectomy and remodelling) and histopathological study were carried out. Although juvenile ossifying fibroma is an uncommon clinical entity, its aggressive local behaviour and high recurrence rate mean that it is important to make an early diagnosis, apply the appropriate treatment and, especially, follow the patient up over the long term.

Periapical surgery of 29 teeth. A comparison of conventional technique, microsaw and ultrasound.

Objectives: A clinical and radiological study is made of the results obtained with different periapical surgical techniques.

Material And Methods: Twenty-nine single-root teeth from 29 patients with periapical pathology following correct endodontic treatment were divided into three groups: (A) 10 patients in which rotary instruments were used to perform osteotomy, apicoectomy and cavity preparation; (B) 10 patients in which rotary instruments were used to perform osteotomy and apical resection, with ultrasound root-end cavity preparation; and (C) 9 patients in which microsaws were used for osteotomy, and ultrasound for cavity preparation. All teeth were filled with IRM.