Phil Marsden - Academia.edu (original) (raw)
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Papers by Phil Marsden
British Dental Journal, 2010
by accuracy? Do population differences in dental maturity infl uence accuracy? There is an urgent... more by accuracy? Do population differences in dental maturity infl uence accuracy? There is an urgent need for an evidencebased reference to address some of these questions. The fi rst aim of this study was to calculate the bias (difference between dental and real age) of age-estimating methods that use mandibular third molar (M3) root formation. The probability of being at least 18 given M3 root stage is also of interest. The second aim was to apply diagnostic tests of accuracy showing how root stage discriminates between individuals at least 18 years of age and those younger and to apply this knowledge to predict the likelihood of age 18 for a single individual. For this part of this study we used a separate reference sample of 1,663 radiographs. We propose an age interval for M3 root stages to aid interpretation of the term 'on the balance of probabilities'. We highlight the similarity in M3 apex maturity between world groups from published data and illustrate how a small group difference in average age has little impact on the confi dence interval of estimated age for an individual.
Following a mass fatality event there is a requirement to establish the identities of the decease... more Following a mass fatality event there is a requirement to establish the identities of the deceased individuals as quickly as possible, but with sufficient certainty. Comparison of post-mortem dentition with ante-mortem records remains one of the most cost-effective methods of achieving this reliably and in a timely manner. The relatively recent introduction of post-mortem CT scanning into the Disaster Victim Identification (DVI) environment has brought with it an abundance of additional detailed information that can be used in a variety of novel ways. Here we present a case where 3D printing was used to produce a model of a victim's dentition, enabling confident odontological identification without resorting to disfiguring incisions in a charred body. On-site access to a 3D printer of sufficient quality meant that there was no significant delay in the identification process, and the cost of consumables used to manufacture the model totalled less than £1.
Dental Nursing, 2010
Human identification (ID) by dental means is well known to the general public and the phrase ‘the... more Human identification (ID) by dental means is well known to the general public and the phrase ‘the body was identified by dental records’ is quite a familiar one. This article provide a brief introduction into the roles and responsibilities of the forensic odontologist
British Dental Journal, 2010
by accuracy? Do population differences in dental maturity infl uence accuracy? There is an urgent... more by accuracy? Do population differences in dental maturity infl uence accuracy? There is an urgent need for an evidencebased reference to address some of these questions. The fi rst aim of this study was to calculate the bias (difference between dental and real age) of age-estimating methods that use mandibular third molar (M3) root formation. The probability of being at least 18 given M3 root stage is also of interest. The second aim was to apply diagnostic tests of accuracy showing how root stage discriminates between individuals at least 18 years of age and those younger and to apply this knowledge to predict the likelihood of age 18 for a single individual. For this part of this study we used a separate reference sample of 1,663 radiographs. We propose an age interval for M3 root stages to aid interpretation of the term 'on the balance of probabilities'. We highlight the similarity in M3 apex maturity between world groups from published data and illustrate how a small group difference in average age has little impact on the confi dence interval of estimated age for an individual.
Following a mass fatality event there is a requirement to establish the identities of the decease... more Following a mass fatality event there is a requirement to establish the identities of the deceased individuals as quickly as possible, but with sufficient certainty. Comparison of post-mortem dentition with ante-mortem records remains one of the most cost-effective methods of achieving this reliably and in a timely manner. The relatively recent introduction of post-mortem CT scanning into the Disaster Victim Identification (DVI) environment has brought with it an abundance of additional detailed information that can be used in a variety of novel ways. Here we present a case where 3D printing was used to produce a model of a victim's dentition, enabling confident odontological identification without resorting to disfiguring incisions in a charred body. On-site access to a 3D printer of sufficient quality meant that there was no significant delay in the identification process, and the cost of consumables used to manufacture the model totalled less than £1.
Dental Nursing, 2010
Human identification (ID) by dental means is well known to the general public and the phrase ‘the... more Human identification (ID) by dental means is well known to the general public and the phrase ‘the body was identified by dental records’ is quite a familiar one. This article provide a brief introduction into the roles and responsibilities of the forensic odontologist