Study on changes of mandibular movement by aging. 1. Analysis of sagittal movements

Nihon Hotetsu Shika Gakkai zasshi
K Nishi

Abstract

It is known that the temporomandibular joint changes with age. However, it isn't clarified yet how these changes affect mandibular movements. Therefore, I investigated the changes which occur in mandibular movement with aging. This study details 62 cases whose age ranged from 20 to 79 years, and whose dentition was either complete or nearly so, and whose intercuspal position was firm. First, I investigated the path of protrusive movement at representative points on the mandible, such as incisor, canine, first molar, second molar, the condylar center and the kinematic axis point. Results were as follows: 1) Data obtained from the 20 to 29 year old age group differed little from the results of previous investigations, 2) The sagittal inclination of the condylar path became less acute in subjects 60 years and over than in the younger subjects. Second, I evaluated the vertical mobility of the condyle by the gap between opening path and closing path of the condyle in sagittal border movement and the location of the kinematic axis point. The results showed that the gap between the two paths of the condylar center was slightly larger and the kinematic axis point was tended to locate more anteriorly in subjects 50 years and up than in ...Continue Reading

Citations

Jan 9, 2007·Journal of Oral Rehabilitation·M A BaqaienD Muessig

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.