Biomedical subjects

G J Cisneros

Publications and source records attributed to G J Cisneros.

23 records · Page 2Linked to original sources

PubMed1984

Computerized skeletal scintigraphy for assessment of mandibular asymmetry.

Normal standards of technetium-99m methylene diphosphonate (99mTc-MDP) uptake in the jaws of adults and growing children have previously been established. This study utilizes the technique of skeletal scintigraphy for diagnosis and treatment planning in 21 patients with mandibular asymmetry. Diagnoses included hemifacial microsomia (n = 6), condylar hyper or hypoplasia (n = 10), and generalized mandibular asymmetry (n = 5). 99mTc-MDP uptake was measured in the right and left condyle, ramus, and body. Uptake was then compared with the known age-adjusted standards. The data were used to determine 1) mandibular growth activity, 2) normal vs. abnormal side, and 3) the effects of operative and functional therapy. The presence of end stage deformity was predicted when mandibular uptake reached the adult norm.

Adolescent↗

PubMed1982

Assessment of mandibular growth by skeletal scintigraphy.

Accurate assessment of facial skeletal growth remains a major problem in craniomaxillofacial surgery. Current methods include 1) comparisons of chronologic age with growth histories of the patient and the family, 2) hand-wrist radiographs compared with a standard, and 3) serial cephalometric radiographs. Uptake of technetium-99m methylene diphosphonate into bone is a reflection of current metabolic activity and blood flow. Therefore, scintigraphy with this radiopharmaceutical might serve as a good method of assessing skeletal growth. Thirty-four patients, ranging in age from 15 months to 22 years, who were undergoing skeletal scintigrams for acute pathologic conditions of the extremities, were used to develop standards of uptake based on age and skeletal maturation. The results indicate that skeletal scintigraphy may be useful in evaluation of mandibular growth.

Adolescent↗

PubMedDate not supplied

Effect of nursing caries on body weight in a pediatric population.

A review of anesthesia and sedation records of children with nursing caries was undertaken. The weights of these 115 children with otherwise noncontributory medical histories were compared to subjects matched for age, gender, race, and socioeconomic status. Nursing caries children were treated using either sedation or general anesthesia and received treatment for at least one pulpally involved tooth. Comparison subjects had no gross carious lesions. The average age for both the comparison and test groups was 3.2 years (SD = 1.01 and 0.98, respectively). While comparison patients weighed 16.2 +/- 3.08 kg, patients with nursing caries weighed only 15.2 +/- 2.66 kg. This difference was statistically significant (P < 0.005). Of the nursing caries patients, 8.7% weighed less than 80% of their ideal weight, compared with only 1.7% of the comparison patients (P < 0.02). Of nursing caries children, 19.1% were in the 10th percentile or less for weight, compared with only 7.0% of comparison subjects (P < 0.01). The mean age of "low weight" patients with nursing caries was significantly greater than for patients at or above their ideal weights, indicating that progression of nursing caries may affect growth adversely.

Age Factors↗

PubMedDate not supplied

Changes in the dentition secondary to palatal crib therapy in digit-suckers: a preliminary study.

This study investigated the effect of the palatal crib appliance used in the correction of open bite malocclusions secondary to fingersucking. Twelve experimental and 12 control subjects were studied for an average of 3.9 months. The sample consisted of patients who were both growing and not growing. Study models taken before and after the study period were analyzed for changes in the following dimensions: overbite, overjet, arch perimeter, arch length, and incisor angulation. Data were analyzed with student t-tests to determine statistical significance. Partial or complete closure of the open bite was achieved averaging 3.7 mm +/- 1.9 mm during the observation period in the experimental group treated with palatal crib therapy. In contrast, the control group displayed a mean bite opening of 0.4 mm +/- 0.8. These values were statistically significant at the P < 0.001 level. Open bite decreased as incisor angulation (P < 0.02), arch length (P < 0.05), and arch perimeter (P < 0.01) decreased. Overjet changes were minimal and statistically insignificant.

Adolescent↗

PubMedDate not supplied

Antibacterial properties of current orthodontic band cements.

PURPOSE: Manufacturers commonly provide information on the physical properties of dental materials, but information on their antibacterial properties is often missing. This study determined the antibacterial properties of four currently used orthodontic band cements against three different strains of Streptococcus mutans. METHODS: The cements utilized were Durelon, Ketac, Mizzy Zinc Phosphate, and Band-Lok, a recently introduced, resin-based, dual-cure glass ionomer cement. Disk diffusion assay methodology was used to test for zones of bacterial inhibition around cement samples. Zones of inhibition were measured in millimeters using an electronic caliper. In addition to cured cement plugs and freshly mixed cement samples, a new variation, in the form of a cement plug surrounding a stainless-steel band, was tested. Twelve combinations resulted from the four cement types and three forms. RESULTS: Of the variables studied, the mix forms of Durelon, Ketac, and Mizzy Zinc Phosphate cement showed the greatest bacterial inhibition (Kruskal-Wallis, P < 0.05). Among the cements tested, Mizzy Zinc Phosphate showed the largest zones of inhibition, with Durelon and Ketac having comparable zones of inhibition (Kruskal-Wallis, P < 0.05). Band-Lok did not exhibit an inhibitory effect against any of the three strains of S. mutans tested. CONCLUSION: A "containment effect" of no bacterial inhibition was observed in the cement samples surrounded by the stainless-steel band material.

Analysis of Variance↗