The research problem addressed in this thesis is the lack of understanding of dentistry in practice, and the limited amount of work from a HCI-perspective in dental informatics. The aim of this thesis is to gain a deeper understanding of the area as a socio-technical domain from a Distributed cognition-perspective using workplace studies. Dentistry is a complex socio-technical domain where humans, technology, tools and artifacts together form a system. The ubiquitous presence of computers has made a mark on the dental profession with e.g. record systems and digital x-ray, and the integration of IT-system in the dental field may inform how dentists make decisions for their patients and how they perform their work. The problem is that not much work has been done in the dental informatics field from a HCI-perspective. This thesis applies workplace studies and Distributed cognition as an approach to HCI to gain an understanding of dentistry in practice and also draw conclusions how Distributed cognition could be applied as a method in HCI. This thesis presents a detailed account of work in dentistry regarding the propagation of information through representational stages and the roles, tasks and artifacts that are present in the complex socio-technical domain of dentistry. The thesis also provide implications for Distributed cognition regarding how it could be developed to fit into today’s complex socio-technical domains both as a method in HCI and as a theoretical framework. Key words: Dental informatics, Human-computer interaction, Distributed cognition, Workplace studies.

Indiana University-Purdue University Indianapolis (IUPUI) / Periodontal disease (PD) affects 42% of US population resulting in compromised quality of life, the potential for tooth loss and influence on overall health. Despite significant understanding of PD etiology, limited longitudinal studies have investigated PD change in response to various treatments. A major barrier is the difficulty of conducting randomized controlled trials with adequate numbers of patients over a longer time. Electronic dental record (EDR) data offer the opportunity to study outcomes following various periodontal treatments. However, using EDR data for research has challenges including quality and missing data. In this dissertation, I studied a cohort of patients with PD from EDR to monitor their disease status over time. I studied retrospectively 28,908 patients who received comprehensive oral evaluation at the Indiana University School of Dentistry between January 1st-2009 and December 31st-2014. Using natural language processing and automated approaches, we 1) determined PD diagnoses from periodontal charting based on case definitions for surveillance studies, 2) extracted clinician-recorded diagnoses from clinical notes, 3) determined the number of patients with disease improvement or progression over time from EDR data. We found 100% completeness for age, sex; 72% for race; 80% for periodontal charting findings; and 47% for clinician-recorded diagnoses. The number of visits ranged from 1-14 with an average of two visits. From diagnoses obtained from findings, 37% of patients had gingivitis, 55% had moderate periodontitis, and 28% had severe periodontitis. In clinician-recorded diagnoses, 50% patients had gingivitis, 18% had mild, 14% had moderate, and 4% had severe periodontitis. The concordance between periodontal charting-generated and clinician-recorded diagnoses was 47%. The results indicate that case definitions for PD are underestimating gingivitis and overestimating the prevalence of periodontitis. Expert review of findings identified clinicians relying on visual assessment and radiographic findings in addition to the case definition criteria to document PD diagnosis. / 2021-08-10

A tecnologia CAD-CAM vem sendo aplicada há mais de uma década para a confecção de trabalhos protéticos odontológicos e bucomaxilofaciais. A tecnologia de prototipagem rápida permite a construção de um modelo em tempo reduzido por meio do sistema CAD (computer-aided design) e CAM (computer-aided manufacturing), permitindo absoluta fidelidade ou discrepância desprezível. Assim, o objetivo deste trabalho será analisar a viabilidade da aplicação da tecnologia CAD-CAM por prototipagem rápida na confecção de estrutura metálica da prótese parcial removível, comparando-a ao método convencional. O projeto visa à obtenção de melhores benefícios funcionais e econômicos aos pacientes, trazendo à luz inovações tecnológicas, novos conceitos e melhores condições para o restabelecimento da saúde bucal. A metodologia empregada partiu da reprodução de um modelo padrão de uma arcada inferior parcialmente desdentada, classe III Mod-1 de Kennedy. Quatro pilares metálicos foram posicionados no local dos primeiros pré-molares e molares. Com o auxílio de um scanner digital 3D, obteve-se um modelo virtual da arcada, no qual foi modelado digitalmente o desenho da estrutura protética. Oito estruturas de PPR foram confeccionadas utilizando-se a tecnologia de prototipagem rápida e, posteriormente fundidas em liga de cobalto-cromo. Outras oito estruturas foram confeccionadas seguindo o protocolo para confecção de PPR de forma convencional. A análise comparativa foi realizada avaliando o peso perdido. A avaliação por peso está dividida em dois grupos. O primeiro, denominado Grupo AP (Ajuste e Polimento), possui quatro estruturas convencionais (Grupo AP-C) e quatro prototipadas (Grupo AP-P). O segundo, chamado Grupo A (Ajuste) realizado somente ajuste sem polimento, com quatro estruturas convencionais (Grupo A-C) e quatro prototipadas (Grupo A-P). Análise comparativa por peso mensurou a porcentagem de material perdido necessário para o adequado assentamento dos apoios das estruturas metálicas pela técnica convencional e por prototipagem em seus respectivos descansos. Os resultados mostraram que as estruturas foram passíveis de serem obtidas pela tecnologia proposta. A análise comparativa mostrou que o Grupo AP-P apresentou um desgaste médio de 0,9826g, correspondente a 13,5188% de seu peso inicial; o Grupo AP-C apresentou um desgaste médio de 0,7529g, correspondente a 12,4380% de seu peso inicial. A análise por meio de Teste t independente mostrou uma diferença estatisticamente significante com valor de p=0,0386, p<0,05. No Grupo A-P houve um desgaste médio de 0,1045g, correspondente a 1,4455% de seu peso inicial. No Grupo A-C houve um desgaste médio de 0,1473g, correspondente a 2,3188% de seu peso inicial. A análise por meio de Teste t independente mostrou uma diferença estatisticamente significante com valor de p=0,0038, p<0,01. Foi viável a aplicação da tecnologia CAD-CAM por prototipagem rápida na confecção de estrutura metálica da prótese parcial removível. / The CAD-CAM technology has been applied for more than a decade for the manufacturing of dental and maxillofacial prosthesis. The rapid prototyping technology allows for the construction of a model in reduced time by using the CAD (computer-aided design) and CAM (computer-aided manufacturing) systems, allowing absolute preciseness or negligible discrepancies. Thus, the purpose of this research is to analyze the viability of the application of the CAD-CAM technology of rapid prototyping in the manufacturing of removable partial dentures(RPD) compared to the conventional method. The purpose of this research was to obtain functional and financial benefits for the patient, demonstrate recent technological advances and concepts and improve the resources for the reestablishment of oral health. The methodology used to determine effectiveness of the CAD-CAM system started with the reproduction of a Kennedy Class III Modification 1 cast of an inferior partially edentulous dental arch,. Four metallic pins were positioned in place of the first premolars and molars. A 3D scanner was used to construct a virtual model of the arch on which the design of the prosthetic structure was digitally formed. Eight RPD frameworks were manufactured using the fast prototyping technology with subsequent casting with a cobalt-chromium alloy; eight others followed the standard RPD waxing/casting procedure. The analysis between procedures evaluated the weight lost when each of the respective frameworks were processing. The results were divided into two groups. The first group, named AP (Adjusted and Polished), had four standard (Group AP-C) and four prototyped (Group AP-P) frameworks. The second group, named A (Adjusted), also includes eight frameworks (four standard, Group A-C, and four prototyped, Group A-P) which were cast and adjustted but not polished. In the comparative analysis, the variation of the weight determined the percentage of the material lost needed for the adequate settling of the rests in their respective seat with the standard and prototyped methods. The data indicated that frameworks can be obtained with the proposed technology. The comparative analysis results showed an average wear of 0.9826g on Group AP-P, corresponding to 13.5188% of its initial weight. In the Group AP-C, average wear was 0.7529g, 12.4380% of its initial weight. With the independent t-test, a significant statistical difference of p=0.0386, p<0.05 was found. The average wear for Group A-P wasf 0,1045g, 1.4455% of its initial weight, while in Group A-C the value was 0.1473g, corresponding to 2.3188% of its initial weight. The independent t-test analysis for these cases shows a significant statistical difference of p=0.0038, p<0.01. The application of the CAD-CAM technology of fast prototyping is viable for the manufacturing of removable partial dentures.

A tecnologia CAD-CAM vem sendo aplicada há mais de uma década para a confecção de trabalhos protéticos odontológicos e bucomaxilofaciais. A tecnologia de prototipagem rápida permite a construção de um modelo em tempo reduzido por meio do sistema CAD (computer-aided design) e CAM (computer-aided manufacturing), permitindo absoluta fidelidade ou discrepância desprezível. Assim, o objetivo deste trabalho será analisar a viabilidade da aplicação da tecnologia CAD-CAM por prototipagem rápida na confecção de estrutura metálica da prótese parcial removível, comparando-a ao método convencional. O projeto visa à obtenção de melhores benefícios funcionais e econômicos aos pacientes, trazendo à luz inovações tecnológicas, novos conceitos e melhores condições para o restabelecimento da saúde bucal. A metodologia empregada partiu da reprodução de um modelo padrão de uma arcada inferior parcialmente desdentada, classe III Mod-1 de Kennedy. Quatro pilares metálicos foram posicionados no local dos primeiros pré-molares e molares. Com o auxílio de um scanner digital 3D, obteve-se um modelo virtual da arcada, no qual foi modelado digitalmente o desenho da estrutura protética. Oito estruturas de PPR foram confeccionadas utilizando-se a tecnologia de prototipagem rápida e, posteriormente fundidas em liga de cobalto-cromo. Outras oito estruturas foram confeccionadas seguindo o protocolo para confecção de PPR de forma convencional. A análise comparativa foi realizada avaliando o peso perdido. A avaliação por peso está dividida em dois grupos. O primeiro, denominado Grupo AP (Ajuste e Polimento), possui quatro estruturas convencionais (Grupo AP-C) e quatro prototipadas (Grupo AP-P). O segundo, chamado Grupo A (Ajuste) realizado somente ajuste sem polimento, com quatro estruturas convencionais (Grupo A-C) e quatro prototipadas (Grupo A-P). Análise comparativa por peso mensurou a porcentagem de material perdido necessário para o adequado assentamento dos apoios das estruturas metálicas pela técnica convencional e por prototipagem em seus respectivos descansos. Os resultados mostraram que as estruturas foram passíveis de serem obtidas pela tecnologia proposta. A análise comparativa mostrou que o Grupo AP-P apresentou um desgaste médio de 0,9826g, correspondente a 13,5188% de seu peso inicial; o Grupo AP-C apresentou um desgaste médio de 0,7529g, correspondente a 12,4380% de seu peso inicial. A análise por meio de Teste t independente mostrou uma diferença estatisticamente significante com valor de p=0,0386, p<0,05. No Grupo A-P houve um desgaste médio de 0,1045g, correspondente a 1,4455% de seu peso inicial. No Grupo A-C houve um desgaste médio de 0,1473g, correspondente a 2,3188% de seu peso inicial. A análise por meio de Teste t independente mostrou uma diferença estatisticamente significante com valor de p=0,0038, p<0,01. Foi viável a aplicação da tecnologia CAD-CAM por prototipagem rápida na confecção de estrutura metálica da prótese parcial removível. / The CAD-CAM technology has been applied for more than a decade for the manufacturing of dental and maxillofacial prosthesis. The rapid prototyping technology allows for the construction of a model in reduced time by using the CAD (computer-aided design) and CAM (computer-aided manufacturing) systems, allowing absolute preciseness or negligible discrepancies. Thus, the purpose of this research is to analyze the viability of the application of the CAD-CAM technology of rapid prototyping in the manufacturing of removable partial dentures(RPD) compared to the conventional method. The purpose of this research was to obtain functional and financial benefits for the patient, demonstrate recent technological advances and concepts and improve the resources for the reestablishment of oral health. The methodology used to determine effectiveness of the CAD-CAM system started with the reproduction of a Kennedy Class III Modification 1 cast of an inferior partially edentulous dental arch,. Four metallic pins were positioned in place of the first premolars and molars. A 3D scanner was used to construct a virtual model of the arch on which the design of the prosthetic structure was digitally formed. Eight RPD frameworks were manufactured using the fast prototyping technology with subsequent casting with a cobalt-chromium alloy; eight others followed the standard RPD waxing/casting procedure. The analysis between procedures evaluated the weight lost when each of the respective frameworks were processing. The results were divided into two groups. The first group, named AP (Adjusted and Polished), had four standard (Group AP-C) and four prototyped (Group AP-P) frameworks. The second group, named A (Adjusted), also includes eight frameworks (four standard, Group A-C, and four prototyped, Group A-P) which were cast and adjustted but not polished. In the comparative analysis, the variation of the weight determined the percentage of the material lost needed for the adequate settling of the rests in their respective seat with the standard and prototyped methods. The data indicated that frameworks can be obtained with the proposed technology. The comparative analysis results showed an average wear of 0.9826g on Group AP-P, corresponding to 13.5188% of its initial weight. In the Group AP-C, average wear was 0.7529g, 12.4380% of its initial weight. With the independent t-test, a significant statistical difference of p=0.0386, p<0.05 was found. The average wear for Group A-P wasf 0,1045g, 1.4455% of its initial weight, while in Group A-C the value was 0.1473g, corresponding to 2.3188% of its initial weight. The independent t-test analysis for these cases shows a significant statistical difference of p=0.0038, p<0.01. The application of the CAD-CAM technology of fast prototyping is viable for the manufacturing of removable partial dentures.

A importância dos serviços de assistência odontológica prestada pela Faculdade de Odontologia da Universidade de São Paulo reflete nos dados obtidos do Anuário Estatístico da Universidade de São Paulo. Somente na disciplina de Cirurgia, foram realizados 1075 atendimentos cirúrgicos, no ano de 2000 saltando para 5686 em 2007. A cada paciente gera-se um prontuário que contém informações de cunho pessoal, da história médica, odontológicas, e de imagens que lhe atribui alto valor legal e de pesquisa. Com a alta procura pelos serviços oferecidos pela faculdade, o número de documentos gerados por paciente cresce proporcionalmente e constata-se que o arquivamento dos prontuários de toda a faculdade é frágil e sujeito à ocorrência de eventos que poderiam danificar o material. A morosidade na busca por dados dos pacientes, a perda de informações, e a dificuldade em realizar estudos epidemiológicos levaram à motivação para o desenvolvimento e avaliação de um prontuário virtual e seu respectivo Banco de Dados da disciplina de Cirurgia da Faculdade de Odontologia da Universidade de São Paulo. Um modelo de ficha para transcrição eletrônica, com os mesmos itens da ficha clínico-cirúrgica, foi elaborado e utilizado para a transcrição das informações dos pacientes atendidos no ambulatório de Cirurgia, no curso noturno, no ano de 2008. Um protótipo de prontuário virtual foi desenvolvido e os dados coletados de 417 pacientes foram inseridos e armazenados localmente num Banco de Dados desenvolvido para WEB, visando uma nova forma de acesso à informação. A partir dos testes de uso retrospectivo e prospectivo, concluímos que o protótipo do prontuário virtual representa uma importante ferramenta baseada em tecnologias de informação, de uso epidemiológico, de pesquisa e de avaliação dos requisitos necessários para o desenvolvimento de um prontuário virtual com mais robustez e flexibilidade. / The importance of the dental aid services offered by the School of Dentistry of the University of São Paulo reflects on the data from the Statistical Yearbook of the University of São Paulo. In the discipline of Oral Surgery by itself, 1075 surgical appointments were done in 2000, which has increased greatly to 5686 in 2007. To every new patient admitted by the service, a record file is created and contains personal information, health and dental history, and images, thus setting a high legal and research value on the patient record file for the institution. With the high demand for these dental services, the number of documents by patient proportionally augments and it can be seen in the entire institution fragility of the files archiving and risk of events occurrence that could damage the material. The slowness of retrieving patient data, lack of information, and difficulties motivate the development and evaluation of an electronic health record and its respective database in the discipline of Oral Surgery of the School of Dentistry of the University of São Paulo. A sheet form for electronic transcription, with the same content of the surgical-clinical questionnaire form, was elaborated to transcript the health information of the patients admitted at the Oral Surgery Service, in the nocturnal graduation course during 2008. A prototype of an electronic health record was created and the collected data were processed and stored in a web-based local database, aiming to an innovative access mode to information. By the tests of retrospective and prospective use of the electronic health record, we concluded the prototype of the electronic health record represents an important tool based in technologies of information, useful to epidemiology, research and evaluation of required features to development of an electronic health record more robust and flexible.

Workplace studies in Human-Computer Interaction (HCI) is a research field that has expanded in an explosive way during the recent years. Today there is a wide range of theoretical approaches and methods to choose from, which makes it problematic to make methodological choices both in research and system design. While there have been several studies that assess the different approaches to workplace studies, there seems to be a lack of studies that explore the theoretical and methodological differences between more structured methods within the research field. In this thesis, a comparative theoretical and empirical analysis of three methods for workplace studies is being conducted to deal with the following research problem: What level of theoretical depth and methodological structure is appropriate when conducting methods for workplace studies to inform design of complex socio-technical systems? When using the two criterions descriptive power and application power, to assess Contextual Design (CD), Determining Information Flow Breakdown (DIB), and Capturing Semi-Automated Decision-Making (CASADEMA), important lessons are learned about which methods are acceptable and useful when the purpose is to inform system design.

A importância dos serviços de assistência odontológica prestada pela Faculdade de Odontologia da Universidade de São Paulo reflete nos dados obtidos do Anuário Estatístico da Universidade de São Paulo. Somente na disciplina de Cirurgia, foram realizados 1075 atendimentos cirúrgicos, no ano de 2000 saltando para 5686 em 2007. A cada paciente gera-se um prontuário que contém informações de cunho pessoal, da história médica, odontológicas, e de imagens que lhe atribui alto valor legal e de pesquisa. Com a alta procura pelos serviços oferecidos pela faculdade, o número de documentos gerados por paciente cresce proporcionalmente e constata-se que o arquivamento dos prontuários de toda a faculdade é frágil e sujeito à ocorrência de eventos que poderiam danificar o material. A morosidade na busca por dados dos pacientes, a perda de informações, e a dificuldade em realizar estudos epidemiológicos levaram à motivação para o desenvolvimento e avaliação de um prontuário virtual e seu respectivo Banco de Dados da disciplina de Cirurgia da Faculdade de Odontologia da Universidade de São Paulo. Um modelo de ficha para transcrição eletrônica, com os mesmos itens da ficha clínico-cirúrgica, foi elaborado e utilizado para a transcrição das informações dos pacientes atendidos no ambulatório de Cirurgia, no curso noturno, no ano de 2008. Um protótipo de prontuário virtual foi desenvolvido e os dados coletados de 417 pacientes foram inseridos e armazenados localmente num Banco de Dados desenvolvido para WEB, visando uma nova forma de acesso à informação. A partir dos testes de uso retrospectivo e prospectivo, concluímos que o protótipo do prontuário virtual representa uma importante ferramenta baseada em tecnologias de informação, de uso epidemiológico, de pesquisa e de avaliação dos requisitos necessários para o desenvolvimento de um prontuário virtual com mais robustez e flexibilidade. / The importance of the dental aid services offered by the School of Dentistry of the University of São Paulo reflects on the data from the Statistical Yearbook of the University of São Paulo. In the discipline of Oral Surgery by itself, 1075 surgical appointments were done in 2000, which has increased greatly to 5686 in 2007. To every new patient admitted by the service, a record file is created and contains personal information, health and dental history, and images, thus setting a high legal and research value on the patient record file for the institution. With the high demand for these dental services, the number of documents by patient proportionally augments and it can be seen in the entire institution fragility of the files archiving and risk of events occurrence that could damage the material. The slowness of retrieving patient data, lack of information, and difficulties motivate the development and evaluation of an electronic health record and its respective database in the discipline of Oral Surgery of the School of Dentistry of the University of São Paulo. A sheet form for electronic transcription, with the same content of the surgical-clinical questionnaire form, was elaborated to transcript the health information of the patients admitted at the Oral Surgery Service, in the nocturnal graduation course during 2008. A prototype of an electronic health record was created and the collected data were processed and stored in a web-based local database, aiming to an innovative access mode to information. By the tests of retrospective and prospective use of the electronic health record, we concluded the prototype of the electronic health record represents an important tool based in technologies of information, useful to epidemiology, research and evaluation of required features to development of an electronic health record more robust and flexible.