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Biomedical subjects

R D Rawson

Publications and source records attributed to R D Rawson.

18 recordsLinked to original sources
PubMed1987

Computerized axial tomography as an aid in bite mark analysis: a case report.

A case is presented to demonstrate the use of computerized axial tomography (CAT) to develop precise registration of incisal edges for comparison to bite marks. Emphasis is drawn to the availability of CAT Scanning equipment and the importance of understanding its use as an adjunct or alternative to already accepted methods of incisal registration.

Bites and Stings↗
PubMed1985

Vascular penetration following intraligamental injection.

The potential for inadvertant intravascular injection of a local anesthetic solution with the intraligament injection syringe is described. The spread of solution is radiographically demonstrated, and precautions during the use of the procedure are suggested.

Adult↗
PubMed1984

Classification of human breast morphology important to bite mark investigation.

There is a great range of variability in human breast size and resiliancy that may have an effect upon the interpretation of bite marks. A proper understanding of the normal range of breast morphology and a system of classification is necessary for an understanding of distortion effects, as well as the precise communication of those effects to others. A classification is given for the morphology of the female human breast following a review of the literature.

Adolescent↗
PubMed1984

Statistical evidence for the individuality of the human dentition.

A general population sample of bite marks in wax is used to demonstrate mathematically the individuality of the human dentition. The general principles of probability are discussed and applied to the analysis of teeth using a precise method of measurement. The unique nature of the human dentition is confirmed.

Bites and Stings↗
PubMed1984

Incidence of bite marks in a selected juvenile population: a preliminary report.

A study of the frequency of bite marks among sheltered children was conducted for a period of three months in the juvenile care facilities in Las Vegas, NV. The study demonstrated an incidence of 1 545 bite marks per 100 000 population. Analysis of the age, sex, and location of bite marks is presented. The study demonstrated an incidence comparable to diseases such as gonorrhea.

Adolescent↗
PubMed1982

Computer comparison of bitemark patterns in identical twins.

Individual dental patterns have been explored by direct comparison of test bites from several sets of young adult monozygotic twins. For this purpose, epoxy models from the dentition of each twin were used for experimental tooth indentations and converted to radiographic contact profiles. These sharply outlined radiographic bitemark patterns were then subjected to a computerized comparison, involving electronic storage and correlations. Despite similar developmental morphology of individual teeth, there were significant variations between the twins in each pair with respect to the individual arrangements of the anterior teeth in the dental arch; the teeth had distinctly different rotations, sometimes reflecting a mirror image of the twin-pair bitemark patterns. Thus, the computer comparison made it clear that in terms of occlusal arch form and individual tooth positions, even so-called identical twins are in fact not dentally identical.

Adult↗
PubMedDate not supplied

The role of needle purging in reducing transfer of microorganisms from local anesthetic cartridge diaphragms.

The literature is reviewed to demonstrate the significant amount of contamination on the external surface of the anesthetic cartridge diaphragm. Current methods of cartridge diaphragm decontamination to prevent injection of pathogens are discussed. A series of bacteriologic tests were conducted to determine the probability of transfer of pathogens from the diaphragm surface through the needle lumen of three different sizes to the deposition site. Results of needle purging suggest that a significant reduction in the transfer of microorganisms is possible using this technique.

Anesthesia, Dental↗