Limits...
Analysis of time-dependent changes in Bitemarks on Styrofoam sheets.

Parimala D, Daniel MJ, Srinivasan SV, Kumaran JV - Contemp Clin Dent (2015)

Bottom Line: To analyze the time-dependent changes in Bitemarks on Styrofoam sheets.The P value was found to be 1 which is statistically not significant implying that there were no significant time-dependent changes in the pattern of Bitemarks.There were no time-dependent changes in the pattern of Bitemarks on Styrofoam sheets hence they serve as better materials than Bitemarks on human skin or food substrates obtained from the scene of the crime.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Medicine and Radiology, Mahatma Gandhi Postgraduate Institute of Dental Sciences, Puducherry, India.

ABSTRACT

Context: The scope of Bitemarks in forensic dentistry is widening as they help the forensic expert in identifying the perpetuator in medicolegal cases. The greatest challenge in Bitemarks analysis is the time-dependent changes produced in Bitemark patterns on various substrates at the scene of the crime.

Aims: To analyze the time-dependent changes in Bitemarks on Styrofoam sheets.

Settings and design: Single centered prospective study.

Materials and methods: Twenty-five subjects were randomly chosen, and dental casts prepared. Then test bites were registered on Styrofoam sheets, overlays prepared from these test bites on subsequent days (day 1, 2, 3, 4) and checked for matching accuracy.

Statistical analysis used: The data were analyzed using Kruskal-Wallis ANOVA to compare the overlays from dental stone cast with test bites on Styrofoam sheets on subsequent days.

Results: The P value was found to be 1 which is statistically not significant implying that there were no significant time-dependent changes in the pattern of Bitemarks.

Conclusions: There were no time-dependent changes in the pattern of Bitemarks on Styrofoam sheets hence they serve as better materials than Bitemarks on human skin or food substrates obtained from the scene of the crime.

No MeSH data available.


Related in: MedlinePlus

Bitemark patterns on Styrofoam sheet with elapse in time on four consequent days (day 1, 2, 3, 4)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4374325&req=5

Figure 3: Bitemark patterns on Styrofoam sheet with elapse in time on four consequent days (day 1, 2, 3, 4)

Mentions: The Bitemarks thus obtained formed the base from which overlays were generated by tracing the pattern of Bitemarks on transparent sheets with a marker [Figure 2a]. The sheets were numbered on the back side for easy recognition on the subsequent days. The sheets were left at a dry place in normal room temperature, no special preservation techniques or protocols were followed. The Bitemark patterns were analyzed for time-dependent changes [Figure 3]. Overlays were generated on four subsequent days from these sheets to analyze the alteration in the pattern of Bitemarks with time elapse [Figure 2b]. A reference overlay was generated for each subject from the dental casts by tracing the incisal edges of anterior teeth with marker on a transparent sheet [Figure 2c]. The overlays thus generated on the subsequent days (day 1, 2, 3, 4) were superimposed on the reference overlay obtained from the dental cast and checked for matching accuracy [Figure 2d]. Then appropriate matching scores were assigned as 0 - no match, 1 - mild match, 2 - moderate match and 3 - excellent match.


Analysis of time-dependent changes in Bitemarks on Styrofoam sheets.

Parimala D, Daniel MJ, Srinivasan SV, Kumaran JV - Contemp Clin Dent (2015)

Bitemark patterns on Styrofoam sheet with elapse in time on four consequent days (day 1, 2, 3, 4)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4374325&req=5

Figure 3: Bitemark patterns on Styrofoam sheet with elapse in time on four consequent days (day 1, 2, 3, 4)
Mentions: The Bitemarks thus obtained formed the base from which overlays were generated by tracing the pattern of Bitemarks on transparent sheets with a marker [Figure 2a]. The sheets were numbered on the back side for easy recognition on the subsequent days. The sheets were left at a dry place in normal room temperature, no special preservation techniques or protocols were followed. The Bitemark patterns were analyzed for time-dependent changes [Figure 3]. Overlays were generated on four subsequent days from these sheets to analyze the alteration in the pattern of Bitemarks with time elapse [Figure 2b]. A reference overlay was generated for each subject from the dental casts by tracing the incisal edges of anterior teeth with marker on a transparent sheet [Figure 2c]. The overlays thus generated on the subsequent days (day 1, 2, 3, 4) were superimposed on the reference overlay obtained from the dental cast and checked for matching accuracy [Figure 2d]. Then appropriate matching scores were assigned as 0 - no match, 1 - mild match, 2 - moderate match and 3 - excellent match.

Bottom Line: To analyze the time-dependent changes in Bitemarks on Styrofoam sheets.The P value was found to be 1 which is statistically not significant implying that there were no significant time-dependent changes in the pattern of Bitemarks.There were no time-dependent changes in the pattern of Bitemarks on Styrofoam sheets hence they serve as better materials than Bitemarks on human skin or food substrates obtained from the scene of the crime.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Medicine and Radiology, Mahatma Gandhi Postgraduate Institute of Dental Sciences, Puducherry, India.

ABSTRACT

Context: The scope of Bitemarks in forensic dentistry is widening as they help the forensic expert in identifying the perpetuator in medicolegal cases. The greatest challenge in Bitemarks analysis is the time-dependent changes produced in Bitemark patterns on various substrates at the scene of the crime.

Aims: To analyze the time-dependent changes in Bitemarks on Styrofoam sheets.

Settings and design: Single centered prospective study.

Materials and methods: Twenty-five subjects were randomly chosen, and dental casts prepared. Then test bites were registered on Styrofoam sheets, overlays prepared from these test bites on subsequent days (day 1, 2, 3, 4) and checked for matching accuracy.

Statistical analysis used: The data were analyzed using Kruskal-Wallis ANOVA to compare the overlays from dental stone cast with test bites on Styrofoam sheets on subsequent days.

Results: The P value was found to be 1 which is statistically not significant implying that there were no significant time-dependent changes in the pattern of Bitemarks.

Conclusions: There were no time-dependent changes in the pattern of Bitemarks on Styrofoam sheets hence they serve as better materials than Bitemarks on human skin or food substrates obtained from the scene of the crime.

No MeSH data available.


Related in: MedlinePlus