Immediate Root Canal Fillings: The Use of Cytophylactic Substances and Noncytotoxic Solutions
Leonardo, Lia, Esberard and Neto
Human T Lymphocyte Subpopulations in Chronic Periapical Lesions
Cymerman, Cymerman, Walters and Nevins
Root Canal Instrumentation with Unitek and K-Flex Files
Canales, Montgomery and del Rio
A Comparative Study of the Wound Healing of Three Types of Flap Design Used in Periapical Surgery
Kramper, Kaminski, Osetek and Heuer
Immediate Root Canal Fillings: The Use of Cytophylactic Substances and Noncytotoxic Solutions
Mario Roberto Leonardo, Rapheal C. Cornelli Lia, Roberto M. Esberard and Carols Benatti Neto
Results of one-appointment endodontic treatment of teeth with vital pulp were analyzed using both the EDTA or the 4% sodium hypochlorite solutions as root canal irrigants followed by immediate filling. One-half of the root canals of each group were filled with calcium hydroxide paste covering the pulp stump, and, in the other half of each group, the canals were obturated with zinc oxide-eugenol cement and gutta-percha points.
The histological analyses of the apical and periapical tissues of dog’s teeth showed that the calcium hydroxide assured an increase in favorable results when the root canals were irrigated with EDTA solution.
Human T Lymphocyte Subpopulations in Chronic Periapical Lesions
Jerome J. Cymerman, Diane H. Cymerman, James Walters and Alan J. Nevins
Seven human chronic periapical lesions were examined for the presence of T lymphocyte subpopulations with monoclonal antibodies using a biotin-avidin-horseradish peroxidase method. Six of the seven specimens stained positively for the presence of T cytotoxic / suppressor and T helper / inducer lymphocytes. The remaining specimen diagnosed as an apical scar contained no T lymphocytes.
Root Canal Instrumentation with Unitek and K-Flex Files
Maria L. Canales, Steve Montgomery and Carlos E. del Rio
The purposes of this study were to determine the effectiveness and any significant differences between K-flex and Unitek files in maintaining original canal shape during instrumentation. Three-hundred twenty-five canals of extracted human anterior and posterior teeth were prepared by 22 sophomore dental students using circumferential filing montions to make flared preparations. Three endodontists examined pre- and postoperative radiographs to see if length, shape, and foramen position were maintained and to observe any canal perforations. Generally, the canals were well prepared and there were no significant differences between the performances with the two types of files. Perforations were not frequent but when present, they occurred in the apical one-third of the canal.
A Comparative Study of the Wound Healing of Three Types of Flap Design Used in Periapical Surgery
Bruce J. Kramper, Edward J. Kaminski, Edward M. Osetek and Michael A. Heuer
The clinical and histological features of wound healing of three common types of surgical flap designs used in periapical surgery were evaluated. A semilunar incision of alveolar mucosa, a submarginal incision of attached gingival, and an intrasulcular incision of the attachment apparatus and papillae of the teeth were performed on beagles and observed at intervals of up to 60 days. Inflammatory changes persisted longer in the semilunar and intrasulcular incisions and retarded healing of the wound. Loss of alveolar bone occurred with the intrasulcular incision. Visible scarring occurred in the submarginal and semilunar incisions.