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Biomedical subjects

Roberto Rocha

Publications and source records attributed to Roberto Rocha.

4 recordsLinked to original sources
PubMed2006

Severe skeletal Class III malocclusion treated without surgery or extraction.

Among the malocclusions involving skeletal discrepancies, Class III occurs with the least frequency; however, it is also severe in the majority of cases. Compared with a Class II malocclusion, the mesial occlusion invariably manifests itself with greater deforming characteristics of facial harmony. The deficiency in the middle third of the face and/or the excessive length of the lower third of the face leads to significant loss of the profile's harmony. Good treatment strategies for this type of malocclusion could involve anything from intervening in the mixed dentition and/or permanent dentition in young adults to the combined orthodontic and surgical approach in patients without growth potential, who do not allow for compensations. This case report illustrates a Class III adolescent patient with severe facial profile deformity during the pubescent growth spurt, treated without extractions or orthognathic surgery.

Cephalometry↗
PubMed2005

Prediction of lower permanent canine and premolars width by correlation methods.

The aim of this study was to determine linear regression equations to estimate the widths of unerupted lower permanent canines and premolars using measurements obtained from 45 degrees oblique teleradiographs. The sample consisted of 30 white Caucasian patients orthodontically treated at the Faculty of Dentistry, Universidade Federal do Rio de Janeiro. The records for each patient included a 45 degrees oblique teleradiograph (left side) in the mixed dentition period and a dental cast of the permanent dentition. Pearson's test was applied between each lower canine, first and second premolars measured on the radiograph, and the sum of their actual widths measured on the dental cast. The strongest correlation occurred for the first premolars for one side (.82) and both sides (.84). One linear regression equation was determined to estimate the widths of un-erupted lower canine and premolars of both sides from a single measurement of the first premolar.

Bicuspid↗
PubMed2004

Modeling guidelines for integration into clinical workflow.

The success of clinical decision-support systems requires that they are seamlessly integrated into clinical workflow. In the SAGE project, which aims to create the technological infra-structure for implementing computable clinical practice guide-lines in enterprise settings, we created a deployment-driven methodology for developing guideline knowledge bases. It involves (1) identification of usage scenarios of guideline-based care in clinical workflow, (2) distillation and disambiguation of guideline knowledge relevant to these usage scenarios, (3) formalization of data elements and vocabulary used in the guideline, and (4) encoding of usage scenarios and guideline knowledge using an executable guideline model. This methodology makes explicit the points in the care process where guideline-based decision aids are appropriate and the roles of clinicians for whom the guideline-based assistance is intended. We have evaluated the methodology by simulating the deployment of an immunization guideline in a real clinical information system and by reconstructing the workflow context of a deployed decision-support system for guideline-based care. We discuss the implication of deployment-driven guideline encoding for sharability of executable guidelines.

Decision Making, Computer-Assisted↗