Radiographic Recognition of

Dental Implants as an Aid to

Identifying the Deceased

Nattawut Rodchom

No 51312310

Radiographic Recognition of

Dental Implants as an Aid to

Identifying the Deceased

Dental Implant

1.Fixture 2.Abutment 3.Crown

Radiographic

review 1992 Sewerin = indentified the influence of various features of implant

2006 Michelinakis = developed computer software to assist in the indentification of implant

Material and Methods

Implant type Radiograph film = Nikon 2000 camera (Tokyo,Japan) Type of radiograph = mouth 200 radiograph images

Material and Methods Implant Recognition System (IRS)

inter-examiner / intra-examiner

The McNemar’s test

Result

TABLE 1—Summary of the number of correct implant tttttttttttttttttttttttttt tttttt tt tttt tttttttttt.

Examiner 1 Examiner 2 111 555 7First assessment without IRS ( . %)

7385 119( 5 9.5%) 80 (40%) 1 3 1 6 5 5 86

43( %) 123 615 8Second assessment with IRS ( . %)

0 40( %)

2TABLE —McNemar’s tests results Test No . Test McNemar’s Statistic Freedom Pr > S

Significance1 EX1-IRS 2.0 1 0.16 NO 1st vs 2nd 2 EX1+IRS 3.6 1 0.06 NO 1st vs 2nd

3 EX2 –IRS 0.2 1 0.64 NO 1st vs 2nd

4 EX2 +IRS 1.1 1 0.30 NO 1st vs 2nd

5 EX1 –IRS+IRS 10.6 1 <0.0011 YES

Result 2TABLE —McNemar’s tests results

Test No . Test McNemar’s Statistic Freedom Pr > S Significance6 EX2-IRS+IRS 1.2 1 0.27

NO7 Total-IRS+IRS 9.0 1 <0.0027

YES8 -IRS EX1 VS EX2 36.25 1 <0.0001

YES9 +IRS EX1 VS EX2 58.7 1 <0.0001

YES10 Total EX1 VS EX2 92.9 1 <0.0001

YES

DISCUSSION

The sample of 200 implant images by Dentists and odontologists from 12 countries

22 manufacturers The most manufacturers Nobel-Biocare,Straumann,Branemark

DISCUSSION

Differentiation intraoral and extraoral radiographs

assessed in a single day Intra-Examiner = no significant Inter-Examiner = significant Implant Recognition System

( IRS )

conciusion

- Nonstandardized radiographs

- Prior knowledge of each examiner

- Modifications to the IRS

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