Some 2,500 years ago Hippocrates developed the "Temperament Theory" of the four humors (fluids) he identified as blood, phlegm, yellow bile, and black bile which then led to the ancient medical concept known as "humorism." In Greco-Roman medicine, these humors were believed to be the influencers of an individual's relative wellness or ill-health, served as a means to classify illnesses, and subsequently guided medical diagnosis and treatment. Centuries later modifications to Hippocrates' hypothesis were suggested for use in dentistry when selecting denture teeth and later as a means to classify the mental status and personality of complete denture patients. This paper examines the historic transition of the terminology, characteristics, and thinking behind the four humors with mention of key thinkers in this journey. Of particular note is the evolution in the application of this theory from its suggested use in medicine, proposed by Hippocrates, to the descriptions of mental attitudes and personalities of complete denture patients first described by Neil and subsequently popularized by M. M. House.
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http://dx.doi.org/10.1111/jopr.13215 | DOI Listing |
J Dent
January 2025
Clinic of General-, Special Care- and Geriatric Dentistry, Center for Dental Medicine, University of Zurich, Zurich, Switzerland. Electronic address:
Objective: This study aimed to investigate the resin compounds from CAD-CAM 3D-printed denture resins, focusing on the identification and classification of free monomers and other components. The primary objective was to determine the chemical profile of these 3D-prinding resin materials.
Methods: Four 3D-printed denture resins, two base materials (1: DentaBASE, Asiga Ltd.
J Dent
January 2025
Clinic of General-, Special Care- and Geriatric Dentistry, Center for Dental Medicine, University of Zurich, Zurich, Switzerland; School of Dentistry, Federal University of Goiàs, Goiania, Brazil; Department of Reconstructive Dentistry, Division of Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
Objective: This study aimed to explore the feasibility and reliability of measuring the vertical dimension of occlusion/rest (OVD/RVD) on 3D facial scans of edentulous patients.
Methods: Nineteen edentulous participants rehabilitated with complete removable dental prostheses (CDs) participated in this study. Analog measurements (control) were obtained directly on the face for each participant with the jaws positioned at the rest position (without CDs, RVD) and at central occlusion (OVD), between the facial landmarks: Glabella (G) and Soft Pogonion (SP), Pronasale (PN) and SP, and Subnasale (SN) and SP.
Swiss Dent J
January 2025
Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
Due to effective preventive measures and advanced techniques in operative dentistry, tooth loss occurs later in life and implant restorations have become a common solution for replacement of missing teeth. Therefore, the use of removable dental prostheses (RDPs) is expected to decline over time. This study aims to evaluate the expected decrease in the production of RDPs in Swiss dental laboratories over the past decade.
View Article and Find Full Text PDFCureus
December 2024
Department of Oral and Maxillofacial Surgery, National Hospital Organization, Kyoto Medical Center, Kyoto, JPN.
This study aimed to reproduce a complete wooden plate denture, which was the first in the world to retain suction under negative pressure, using the same materials and methods from 400 years ago (i.e., the Edo period) to verify its masticatory performance.
View Article and Find Full Text PDFNutrients
December 2024
Research Centre in Dental Sciences (CICO-UFRO), Dental School, Universidad de La Frontera, Temuco 4781176, Chile.
Unlabelled: Given the rising global population of older adults and their association with edentulism and the use of complete removable prostheses [CRP], it is imperative to pursue solutions for issues such as the relationship between poor diets and masticatory deficiency.
Objective: To examine the research on the efficacy of dietary counseling in enhancing mastication and nutrition in older adults with CRP.
Methods: A systematic literature review was performed in the PubMed, Trip, and Web of Science databases.
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