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Indication and limitations of using palatal rugae for personal identification in edentulous cases

Identifieur interne : 000378 ( PascalFrancis/Corpus ); précédent : 000377; suivant : 000379

Indication and limitations of using palatal rugae for personal identification in edentulous cases

Auteurs : Maki Ohtani ; Naoki Nishida ; Takashi Chiba ; Masayuki Fukuda ; Yoji Miyamoto ; Naofumi Yoshioka

Source :

RBID : Pascal:08-0184648

Descripteurs français

English descriptors

Abstract

To explore the availability and the limitations of using the palatal rugae pattern in forensic practice for personal identification in edentulous cases, we set up an experiment, which involved 48 patients who had both old and new complete dentures and we observed their rugae. First, we made 48 pairs of maxillary casts from their old and new dentures and a further 50 maxillary casts from complete dentures at random, to use as variables. All the initial impressions taken from the mucosal surfaces of complete dentures were made from alginate impression materials, and the maxillary casts were made from hard dental plaster. Secondly, all 146 casts were trimmed so that all the areas except for the rugae area were removed. Subsequently, 50 examiners were given the 48 casts from the old dentures and were then asked to compare them with the other 98 casts for possible matches. The case numbers, which matched correctly, were recorded. The median percentage of correct matches among the 50 examiners was 94%, despite variations in their experience with forensic identification, and this accuracy does not differ significantly from that in dentate cases, as described in previous publications. The median percentage of correct matches among the 48 cases was 90%. Analyzing the incidence of obtaining a correct match in each case revealed that there were three major misleading shapes that could give rise to a low rate of correct matches; (1) severely low and poorly demarcated eminences of rugae, (2) change of palatal height, and (3) non-complex rugae pattern. These features are mainly due to the shape of the edentulous palate itself and rarely due to the dentures, and could lead to difficulties in finding unique points for use in matching rugae patterns. The results suggest that an appropriate selection of cases, taking into consideration the above misleading shapes, may establish an increased rate of accuracy for identification with this method, thereby bringing the percentage of correct matches closer to 100% in edentulous cases, which is also the percentage of correct matches previously reported in dentate cases.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

pA  
A01 01  1    @0 0379-0738
A02 01      @0 FSINDR
A03   1    @0 Forensic sci. int.
A05       @2 176
A06       @2 2-3
A08 01  1  ENG  @1 Indication and limitations of using palatal rugae for personal identification in edentulous cases
A11 01  1    @1 OHTANI (Maki)
A11 02  1    @1 NISHIDA (Naoki)
A11 03  1    @1 CHIBA (Takashi)
A11 04  1    @1 FUKUDA (Masayuki)
A11 05  1    @1 MIYAMOTO (Yoji)
A11 06  1    @1 YOSHIOKA (Naofumi)
A14 01      @1 Division of Forensic Sciences, Department of Social Medicine, Akita University School of Medicine @2 1-1-1 Hondo, Akita 010-8543 @3 JPN @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 6 aut.
A14 02      @1 Division of Dentistry and Oral Surgery, Akita University School of Medicine @3 JPN @Z 4 aut. @Z 5 aut.
A20       @1 178-182
A21       @1 2008
A23 01      @0 ENG
A43 01      @1 INIST @2 15440 @5 354000173691000110
A44       @0 0000 @1 © 2008 INIST-CNRS. All rights reserved.
A45       @0 8 ref.
A47 01  1    @0 08-0184648
A60       @1 P
A61       @0 A
A64 01  1    @0 Forensic science international
A66 01      @0 GBR
C01 01    ENG  @0 To explore the availability and the limitations of using the palatal rugae pattern in forensic practice for personal identification in edentulous cases, we set up an experiment, which involved 48 patients who had both old and new complete dentures and we observed their rugae. First, we made 48 pairs of maxillary casts from their old and new dentures and a further 50 maxillary casts from complete dentures at random, to use as variables. All the initial impressions taken from the mucosal surfaces of complete dentures were made from alginate impression materials, and the maxillary casts were made from hard dental plaster. Secondly, all 146 casts were trimmed so that all the areas except for the rugae area were removed. Subsequently, 50 examiners were given the 48 casts from the old dentures and were then asked to compare them with the other 98 casts for possible matches. The case numbers, which matched correctly, were recorded. The median percentage of correct matches among the 50 examiners was 94%, despite variations in their experience with forensic identification, and this accuracy does not differ significantly from that in dentate cases, as described in previous publications. The median percentage of correct matches among the 48 cases was 90%. Analyzing the incidence of obtaining a correct match in each case revealed that there were three major misleading shapes that could give rise to a low rate of correct matches; (1) severely low and poorly demarcated eminences of rugae, (2) change of palatal height, and (3) non-complex rugae pattern. These features are mainly due to the shape of the edentulous palate itself and rarely due to the dentures, and could lead to difficulties in finding unique points for use in matching rugae patterns. The results suggest that an appropriate selection of cases, taking into consideration the above misleading shapes, may establish an increased rate of accuracy for identification with this method, thereby bringing the percentage of correct matches closer to 100% in edentulous cases, which is also the percentage of correct matches previously reported in dentate cases.
C02 01  X    @0 002B24
C02 02  X    @0 002B30A10
C02 03  X    @0 002B01
C03 01  X  FRE  @0 Indication @5 02
C03 01  X  ENG  @0 Indication @5 02
C03 01  X  SPA  @0 Indicación @5 02
C03 02  X  FRE  @0 Palais @5 03
C03 02  X  ENG  @0 Palate @5 03
C03 02  X  SPA  @0 Paladar @5 03
C03 03  X  FRE  @0 Identification @5 05
C03 03  X  ENG  @0 Identification @5 05
C03 03  X  SPA  @0 Identificación @5 05
C03 04  X  FRE  @0 Etude cas @5 06
C03 04  X  ENG  @0 Case study @5 06
C03 04  X  SPA  @0 Estudio caso @5 06
C03 05  X  FRE  @0 Dentier @5 08
C03 05  X  ENG  @0 Denture @5 08
C03 05  X  SPA  @0 Dentadura @5 08
C03 06  X  FRE  @0 Médecine légale @5 09
C03 06  X  ENG  @0 Legal medicine @5 09
C03 06  X  SPA  @0 Medicina legal @5 09
C03 07  X  FRE  @0 Aspect médicolégal @5 25
C03 07  X  ENG  @0 Forensic aspect @5 25
C03 07  X  SPA  @0 Aspecto forense @5 25
C03 08  X  FRE  @0 Police scientifique @5 26
C03 08  X  ENG  @0 Forensic science @5 26
C03 08  X  SPA  @0 Ciencia forense @5 26
N21       @1 112
N44 01      @1 OTO
N82       @1 OTO

Format Inist (serveur)

NO : PASCAL 08-0184648 INIST
ET : Indication and limitations of using palatal rugae for personal identification in edentulous cases
AU : OHTANI (Maki); NISHIDA (Naoki); CHIBA (Takashi); FUKUDA (Masayuki); MIYAMOTO (Yoji); YOSHIOKA (Naofumi)
AF : Division of Forensic Sciences, Department of Social Medicine, Akita University School of Medicine/1-1-1 Hondo, Akita 010-8543/Japon (1 aut., 2 aut., 3 aut., 6 aut.); Division of Dentistry and Oral Surgery, Akita University School of Medicine/Japon (4 aut., 5 aut.)
DT : Publication en série; Niveau analytique
SO : Forensic science international; ISSN 0379-0738; Coden FSINDR; Royaume-Uni; Da. 2008; Vol. 176; No. 2-3; Pp. 178-182; Bibl. 8 ref.
LA : Anglais
EA : To explore the availability and the limitations of using the palatal rugae pattern in forensic practice for personal identification in edentulous cases, we set up an experiment, which involved 48 patients who had both old and new complete dentures and we observed their rugae. First, we made 48 pairs of maxillary casts from their old and new dentures and a further 50 maxillary casts from complete dentures at random, to use as variables. All the initial impressions taken from the mucosal surfaces of complete dentures were made from alginate impression materials, and the maxillary casts were made from hard dental plaster. Secondly, all 146 casts were trimmed so that all the areas except for the rugae area were removed. Subsequently, 50 examiners were given the 48 casts from the old dentures and were then asked to compare them with the other 98 casts for possible matches. The case numbers, which matched correctly, were recorded. The median percentage of correct matches among the 50 examiners was 94%, despite variations in their experience with forensic identification, and this accuracy does not differ significantly from that in dentate cases, as described in previous publications. The median percentage of correct matches among the 48 cases was 90%. Analyzing the incidence of obtaining a correct match in each case revealed that there were three major misleading shapes that could give rise to a low rate of correct matches; (1) severely low and poorly demarcated eminences of rugae, (2) change of palatal height, and (3) non-complex rugae pattern. These features are mainly due to the shape of the edentulous palate itself and rarely due to the dentures, and could lead to difficulties in finding unique points for use in matching rugae patterns. The results suggest that an appropriate selection of cases, taking into consideration the above misleading shapes, may establish an increased rate of accuracy for identification with this method, thereby bringing the percentage of correct matches closer to 100% in edentulous cases, which is also the percentage of correct matches previously reported in dentate cases.
CC : 002B24; 002B30A10; 002B01
FD : Indication; Palais; Identification; Etude cas; Dentier; Médecine légale; Aspect médicolégal; Police scientifique
ED : Indication; Palate; Identification; Case study; Denture; Legal medicine; Forensic aspect; Forensic science
SD : Indicación; Paladar; Identificación; Estudio caso; Dentadura; Medicina legal; Aspecto forense; Ciencia forense
LO : INIST-15440.354000173691000110
ID : 08-0184648

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Pascal:08-0184648

Le document en format XML

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<div type="abstract" xml:lang="en">To explore the availability and the limitations of using the palatal rugae pattern in forensic practice for personal identification in edentulous cases, we set up an experiment, which involved 48 patients who had both old and new complete dentures and we observed their rugae. First, we made 48 pairs of maxillary casts from their old and new dentures and a further 50 maxillary casts from complete dentures at random, to use as variables. All the initial impressions taken from the mucosal surfaces of complete dentures were made from alginate impression materials, and the maxillary casts were made from hard dental plaster. Secondly, all 146 casts were trimmed so that all the areas except for the rugae area were removed. Subsequently, 50 examiners were given the 48 casts from the old dentures and were then asked to compare them with the other 98 casts for possible matches. The case numbers, which matched correctly, were recorded. The median percentage of correct matches among the 50 examiners was 94%, despite variations in their experience with forensic identification, and this accuracy does not differ significantly from that in dentate cases, as described in previous publications. The median percentage of correct matches among the 48 cases was 90%. Analyzing the incidence of obtaining a correct match in each case revealed that there were three major misleading shapes that could give rise to a low rate of correct matches; (1) severely low and poorly demarcated eminences of rugae, (2) change of palatal height, and (3) non-complex rugae pattern. These features are mainly due to the shape of the edentulous palate itself and rarely due to the dentures, and could lead to difficulties in finding unique points for use in matching rugae patterns. The results suggest that an appropriate selection of cases, taking into consideration the above misleading shapes, may establish an increased rate of accuracy for identification with this method, thereby bringing the percentage of correct matches closer to 100% in edentulous cases, which is also the percentage of correct matches previously reported in dentate cases.</div>
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<NO>PASCAL 08-0184648 INIST</NO>
<ET>Indication and limitations of using palatal rugae for personal identification in edentulous cases</ET>
<AU>OHTANI (Maki); NISHIDA (Naoki); CHIBA (Takashi); FUKUDA (Masayuki); MIYAMOTO (Yoji); YOSHIOKA (Naofumi)</AU>
<AF>Division of Forensic Sciences, Department of Social Medicine, Akita University School of Medicine/1-1-1 Hondo, Akita 010-8543/Japon (1 aut., 2 aut., 3 aut., 6 aut.); Division of Dentistry and Oral Surgery, Akita University School of Medicine/Japon (4 aut., 5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Forensic science international; ISSN 0379-0738; Coden FSINDR; Royaume-Uni; Da. 2008; Vol. 176; No. 2-3; Pp. 178-182; Bibl. 8 ref.</SO>
<LA>Anglais</LA>
<EA>To explore the availability and the limitations of using the palatal rugae pattern in forensic practice for personal identification in edentulous cases, we set up an experiment, which involved 48 patients who had both old and new complete dentures and we observed their rugae. First, we made 48 pairs of maxillary casts from their old and new dentures and a further 50 maxillary casts from complete dentures at random, to use as variables. All the initial impressions taken from the mucosal surfaces of complete dentures were made from alginate impression materials, and the maxillary casts were made from hard dental plaster. Secondly, all 146 casts were trimmed so that all the areas except for the rugae area were removed. Subsequently, 50 examiners were given the 48 casts from the old dentures and were then asked to compare them with the other 98 casts for possible matches. The case numbers, which matched correctly, were recorded. The median percentage of correct matches among the 50 examiners was 94%, despite variations in their experience with forensic identification, and this accuracy does not differ significantly from that in dentate cases, as described in previous publications. The median percentage of correct matches among the 48 cases was 90%. Analyzing the incidence of obtaining a correct match in each case revealed that there were three major misleading shapes that could give rise to a low rate of correct matches; (1) severely low and poorly demarcated eminences of rugae, (2) change of palatal height, and (3) non-complex rugae pattern. These features are mainly due to the shape of the edentulous palate itself and rarely due to the dentures, and could lead to difficulties in finding unique points for use in matching rugae patterns. The results suggest that an appropriate selection of cases, taking into consideration the above misleading shapes, may establish an increased rate of accuracy for identification with this method, thereby bringing the percentage of correct matches closer to 100% in edentulous cases, which is also the percentage of correct matches previously reported in dentate cases.</EA>
<CC>002B24; 002B30A10; 002B01</CC>
<FD>Indication; Palais; Identification; Etude cas; Dentier; Médecine légale; Aspect médicolégal; Police scientifique</FD>
<ED>Indication; Palate; Identification; Case study; Denture; Legal medicine; Forensic aspect; Forensic science</ED>
<SD>Indicación; Paladar; Identificación; Estudio caso; Dentadura; Medicina legal; Aspecto forense; Ciencia forense</SD>
<LO>INIST-15440.354000173691000110</LO>
<ID>08-0184648</ID>
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