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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

(a) Styrofoam sheet (b) test bite registration (c) resultant bite pattern (d) unfolded Styrofoam sheet showing maxillary and mandibular bite pattern on the same plane
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Figure 1: (a) Styrofoam sheet (b) test bite registration (c) resultant bite pattern (d) unfolded Styrofoam sheet showing maxillary and mandibular bite pattern on the same plane

Mentions: Twenty-five healthy subjects above 15 years of age were randomly chosen and after obtaining informed consent impressions of both the dental arches were made and the corresponding casts were prepared. Test bites were registered from these individuals by making them bite on Styrofoam sheets obtained from the common disposable Styrofoam plates that are commonly referred as thermocol plates [Figure 1a]. The thickness of the sheets we used was 0.2 cm and the sheets were custom made from Styrofoam plates of 9 inches diameter.


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

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

(a) Styrofoam sheet (b) test bite registration (c) resultant bite pattern (d) unfolded Styrofoam sheet showing maxillary and mandibular bite pattern on the same plane
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 1: (a) Styrofoam sheet (b) test bite registration (c) resultant bite pattern (d) unfolded Styrofoam sheet showing maxillary and mandibular bite pattern on the same plane
Mentions: Twenty-five healthy subjects above 15 years of age were randomly chosen and after obtaining informed consent impressions of both the dental arches were made and the corresponding casts were prepared. Test bites were registered from these individuals by making them bite on Styrofoam sheets obtained from the common disposable Styrofoam plates that are commonly referred as thermocol plates [Figure 1a]. The thickness of the sheets we used was 0.2 cm and the sheets were custom made from Styrofoam plates of 9 inches diameter.

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