A composite general anesthesia technique using ketamine for pediatric outpatients.

A study of 43 pediatric oral surgery patients was conducted in a clinical environment. The anesthetic regimen of a minimum dose of ketamine hydrochloride, nitrous oxide-oxygen, and a local anesthetic was tested for recovery time and degree of acceptance by parents and patients. With this regimen, the average recovery time from completion of the procedure was 30 minutes. The combination of these drugs provided a rapid, smooth induction, additional time while the ketamine-induced anesthesia was dissipating, no major complications, and good acceptance by parents and patients.     

Endodontic morphology. I. An alternative method of study.

Several techniques have been reported for the demonstration of canal systems in vitro. An additional technique has been developed which allows for the study of the internal anatomy of teeth prior to and after instrumentation on the same specimens. The use of a water-soluble contrast medium infused into root canal systems provides for easy removal of the contrast medium without alteration of the internal anatomy of the teeth. The pulps were eliminated from 164 extracted human teeth by enzyme action; the pulp chambers and root canal systems were filled under vacuum with a water-soluble, radiopaque contrast medium; and each tooth was radiographed from three angles with the contrast medium in situ. The contrast medium was cleared and an additional radiograph was taken. The potential for this procedure in the evaluation and assessment of the technique of canal preparation has been projected.     

Oral surgery program university of california, san francisco.

The two cases presented here demonstrate a successful therapeutic modality with resection followed by immediate reconstruction with bone grafts. At least one of the cases presented seems to indicate that the tumor is relatively less aggressive than the simple ameloblastoma. The histopathology of the two cases suggests that this odontogenic tumor has a wider histologic variation than originally described by Pindborg.     

A clinical evaluation of posterior composite resin restorations

There is a trend towards manufacturers seeking to provide dentists with a single, all-purpose composite resin, usually of the small particle hybrid type. This three-year clinical study compared the clinical performance of three different types of composite resin used in posterior teeth and identified several modes of failure. Of the 330 restorations (three composite resins and one amalgam control) initially placed in 72 patients, 223 restorations in 48 patients were available for evaluation at three years. Modified clinical criteria for assessing the restorations were able to discriminate among the composite resins. A microfilled composite and a small particle hybrid exhibited increasing evidence of marginal fracture (crevice) with time. In addition, the small particle hybrid showed evidence of wear at the margins more frequently than the other materials. Of the restorations available for assessment, four restorations of each of these two types of composite resin required replacement during the study. Coarse particle hybrid restorations showed evidence of wear but little evidence of marginal fracture.     

Similarity of bacteriocins of Streptococcus mutans from mother and infant

Bacteriocin typing has been used as an epidemiological tool for tracing bacterial infections in man. The production of bacteriocins by 120 Streptococcus mutans isolates from 4 mother-infant pairs was studied to test the likelihood of maternal transmission of this species. The patterns of inhibition were sufficiently different to allow differentiation of the 120 isolates into 42 bacteriocin types. The bacteriocin codes of isolates within one pair did not correspond to the codes of strains isolated from any other pair examined. The number of infant strains (per 10 infant isolates) matching maternal strains within each mother-infant pair were $\text{5}\text{10}$, $\text{10}\text{10}$, $\text{7}\text{10}$, and $\text{9}\text{10}$ for each of the pairs respectively. The results demonstrated significant intra-pair homogeneity of Strep. mutans strains based on bacteriocin production.     

Aid to correct tongue position in the mandibular complete denture

A simple technique has been described for training an edentulous patient with a retracted tongue to position his tongue in a normal position for optimum stability, retention, and function of the mandibular complete denture.