Carmen María Ferrer Luque

Morphologic Analysis of the Root Apex in Human Teeth

INTRODUCTION To determine the morphologic shape and position of the root apex and the major foramen in maxillary and mandibular teeth. METHODS A total of 845 maxillary and mandibular human teeth root specimens were evaluated. Each root specimen was measured at each root apex by using a calibrated microscope at a magnification of 20x. The anatomic parameters evaluated included the position of the root apex and the major foramen (in the center, buccal, lingual, mesial, or distal) and shapes of peripheral contours of the major foramen (rounded, oval, asymmetric, and semilunar) and root apex (rounded, flat, beveled, and elliptical). All data were summarized, and means, frequencies, and percentages were calculated for each group of specimens (incisors, canines, premolars, and molars). RESULTS The most frequent root apex morphology in maxillary and mandibular teeth was the round shape (35.1%). The most frequent shape of the apical foramen was round (52.9%) or oval (25.2%). The major location of both the root apex (39.7%) and the major foramen (58.4%) was in the center of the root. CONCLUSION The most frequent root apex morphology and apical foramen in the maxillary and mandibular teeth was the round followed by the oval shape. The most prevalent location of the root apex and the major foramen was in the center followed by the distal position.

Antimicrobial activity of essential oils and chloroform alone and combinated with cetrimide against Enterococcus faecalis biofilm

The Enterococcus faecalis bacteria have been identified as the most commonly recovered species from teeth with persistent endodontic infections. The antimicrobial activity of essential oils and chloroform (CHL), alone and in association with various concentrations of cetrimide (CTR), against biofilm of Enterococcus faecalis was investigated. Solutions of CHL, eucalyptus oil (EO) and orange oil (OO) associated with CTR at 0.3%, 0.2%, 0.1%, and 0.05% were used to determine antimicrobial activity by exposing treated bovine dentine blocks to E. faecalis. Biofilms grown in the dentine blocks for 7 days were exposed to solutions for 2 and 5 min. Biofilm reduction between OO and EO at 2 min did not show any significant differences; however, OO had a higher kill percentage of biofilms than did the eucalyptus oil at 5 min (p < 0.01). Combinations with CTR at all concentrations achieved a 100% kill rate at 2 and 5 min. The association of CTR with solvent agents achieved the maximum antimicrobial activity against E. faecalis biofilms in dentine.

Estudio de microfiltración con nuevos materiales alternativos para el sector posterior

Fundamento: recientemente, se han comercializado una serie de materiales como los composites condensables, ormoceras y los denominados materiales inteligentes con la finalidad disminuir algunos de los inconvenientes mas graves que presentan los composites convencionales. Material y Metodo: el proposito de nuestro estudio ha sido comparar la filtracion marginal de restauraciones de clase II MOD, obturadas con materiales representativos de cada grupo. Grupo 1: Prime & Bond NT. - SureFil, Grupo 2: Ariston liner- Ariston pHc, Grupo 3: One Coat Bond- Synergy, Grupo 4: One-Step- Pyramid y Grupo 5: Etch & Prime3.0- Definite. Las muestras se termociclaron, y se almacenaron en azul de metileno al 2%, durante 7 dias a 37o C. Despues de ser seccionados longitudinalmente, se evaluo la microfiltracion mediante observacion con lupa estereoscopica a 10x. Resultados: El analisis estadistico indica que no existen diferencias significativas en la filtracion entre los grupos 3, 4 y 5, pero estos tres grupos si presentan diferencias significativas respecto a los dos restantes: 1 y 2, que muestran mayores tasas de filtracion. Conclusiones: la filtracion en los grupos obturados con Prime & Bond- SureFil y Ariston Liner- Ariston pHc es significativamente mayor que en los grupos en que se utilizo One Coat Bond- Synergy, One-Step- Pyramid y Etch & Prime3.0- Definite. Palabras clave: Composites condensables, Ormoceras, Microfiltracion marginal.