Biomedical subjects

A E Skidmore

Publications and source records attributed to A E Skidmore.

18 recordsLinked to original sources

PubMed1994

An evaluation of apical leakage of a glass ionomer root canal sealer.

An in vitro dye leakage study was performed to compare the apical microleakage of a glass ionomer root canal sealer to Roth's 801 sealer. Forty-five single-rooted teeth were randomly divided into three groups: Ketac-Endo, Roth's 801, and the control group (no sealer). All groups were instrumented using a step-back technique and obturated with laterally condensed gutta-percha. The teeth were placed in a vacuum chamber under a pressure of 710 torr for 15 min and then immersed in India ink under vacuum for 24 h. The teeth were allowed to passively stain for 4 days and were cleared and evaluated for linear dye leakage using a binocular dissecting microscope. Statistical analysis revealed that sealer significantly improves the apical seal of laterally condensed gutta-percha. However, the apical seal exhibited by Ketac-Endo was not significantly different from that provided by Roth's 801 sealer.

Analysis of Variance↗

PubMed1993

Dye ingress in molars: furcation to chamber floor.

An in vitro dye leakage study was performed to determine the incidence of patent furcal accessory canals following exposure of the pulp chamber to 5.25% sodium hypochlorite. One hundred extracted molars were labeled, endodontically opened, and irrigated for 1 h at 5-min intervals. The external furcations were exposed to 0.5% basic fuchsin for 24 h. Patency was determined by dye presence on the chamber floor. Statistical analysis revealed that first and second molars, regardless of arch position or location, demonstrated a patent accessory canal at a rate of 57% +/- 19.6% in the furcal area. It was concluded that accessory canal exposure to 5.25% sodium hypochlorite in the furcal area of molars produced patency which was demonstrable via passive methods--no vacuum or injection pressures were utilized.

Chi-Square Distribution↗

PubMed1992

Pulpal evaluation of teeth restored with fixed prostheses.

The literature demonstrates that each of the elements of crown fabrication involves possible and probable insult to the pulpal tissues of the tooth. Preparation of the tooth can result in pulpal inflammation or even burn lesions. The impression technique can result in reduction of the odontoblastic layer caused by drying of the dentin. Temporary coverage of the preparation involves the use of self-curing resins and temporary cements, both of which can irritate the pulp. The final restoration is attached with cements that are often implicated in pulpal irritation. Dental caries and the procedures necessary to remove it and restore the tooth before preparation for a fixed prosthesis can injure the pulp. This study was done to evaluate the effects of complete coverage fixed prosthetic restorations on the dental pulp. A recall letter was mailed to 1221 patients who had received a fixed partial denture or single crown during the years 1984-1988. One hundred thirty patients were examined. Each tooth was evaluated for pulpal health, periodontal integrity, and clinical acceptability of the restoration. Of the 603 teeth examined, 166 had undergone root canal therapy before placement of the restoration, leaving 437 that were crowned while vital. Of these, 25 (5.7%) were in need of root canal therapy or had undergone root canal therapy after cementation of the fixed prosthesis.

Crowns↗

PubMed1991

Pain of dental origin.

Patients experience oral pain in ways that make an accurate diagnosis difficult. The same complaints can be caused by either dental or nonodontogenic diseases. The author systematically explores symptoms and etiologies to direct the health care provider to an accurate diagnosis and treatment.

Animals↗

PubMed1990

Evaluation of image quality in individual films of double film packets.

A total of 47 double film packets were exposed of a radiographic standard (step-wedge), a clinical model (dried skull), and a clinical situation (endodontic therapy). Dentists were employed as expert observers to compare detail and definition between front and back films within each packet. Front films (those closest to the source) had significantly superior image quality compared to back films (those further from the source). In vitro radiographic trials were significantly similar to in vivo radiographic results.

Chi-Square Distribution↗

PubMed1990

Periapical biopsy report: an analysis of over a 10-year period.

Biopsy reports of specimens from the apices of 1659 teeth physically present at the time the biopsy was performed were reviewed. The following information was recorded from each report: (a) source of specimen, (b) sex of patient, (c) age of patient, (d) location of tooth associated with lesion, and (e) diagnoses reported. Data were recorded and analyzed by chi-square analysis to note significant differences. This study found that 52% of the lesions were granulomas, 42% cysts, 2% periapical scars, and 4% other disorders. No differences were found between males and females in regard to age and location of lesions. Overall, the most common location for lesions was the maxillary anterior, followed by maxillary posterior, mandibular posterior, and finally the mandibular anterior jaw. This also was the case for all age ranges except 60 to 69 yr of age where lesions in the maxillary posterior area were most common. More granulomas were detected in all areas except in the mandibular posterior area where cysts were more common.

Adult↗

PubMed1989

Lymphoma: an unusual oral presentation.

A lymphoma which was originally diagnosed as an inflammatory process is reported. A brief review of lymphoma's etiology, predilection for the oral cavity, and similarities to inflammation is presented. Particular emphasis is placed on the premise that an initial benign diagnosis may not be accurate and that monitoring patients is essential in any disease entity whether benign or malignant.

Humans↗

PubMed1988