Impact velocities of the teeth after a sudden unloading at various initial bite forces, degrees of mouth opening and distances of travel.

T. Nagashima, Geranda Slager, E. Otten, M.L. Broekhuijsen, J.D. van Willigen

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A potentially dangerous situation arises when an individual bites on hard and brittle food which suddenly breaks, since the impact velocity of the lower teeth onto the upper teeth after the food is broken can be high and may cause dental damage. The present experiments were designed to study the magnitude of the impact velocity after a sudden unloading at various initial bite forces, degrees of mouth opening, and distances of travel. Subjects were asked to perform a static biting task during which the resistance to the bite was suddenly removed. The upward mandible movement was arrested after a certain distance. The velocity of the lower teeth at impact was calculated just before the mandible came to a standstill in combinations of 4 different bite forces (100, 80, 60, and 40 N), 4 different initial degrees of mouth opening (33.5, 30.5, 27.5, and 24.5 mm), and 3 different distances of travel of the mandible (4.5, 3.0, and 1.5 mm). We found that the bite force rapidly declined after the unloading, resulting in a small impact velocity of the lower front teeth. This impact velocity largely depended on the magnitude of the initial bite force and the distance traveled; it was barely sensitive to variations in degree of initial mouth opening. The maximal velocity of the lower teeth was 0.43 m/s (at an initial bite force of 100 N). This maximum was reached after a distance of travel of about 4 mm in 12 ms. The data suggest that the rapid decline in bite force coupled with a limitation of impact velocity is due to the force-velocity properties of the active jaw muscles and is not caused by neural control.
Original languageEnglish
Pages (from-to)1751-1759
JournalJournal of dental research
Volume76
Issue number11
DOIs
Publication statusPublished - 1 Nov 1997
Externally publishedYes

Keywords

  • dentistry

Cite this

@article{657bd24362ee4d77841dcd0541e752d2,
title = "Impact velocities of the teeth after a sudden unloading at various initial bite forces, degrees of mouth opening and distances of travel.",
abstract = "A potentially dangerous situation arises when an individual bites on hard and brittle food which suddenly breaks, since the impact velocity of the lower teeth onto the upper teeth after the food is broken can be high and may cause dental damage. The present experiments were designed to study the magnitude of the impact velocity after a sudden unloading at various initial bite forces, degrees of mouth opening, and distances of travel. Subjects were asked to perform a static biting task during which the resistance to the bite was suddenly removed. The upward mandible movement was arrested after a certain distance. The velocity of the lower teeth at impact was calculated just before the mandible came to a standstill in combinations of 4 different bite forces (100, 80, 60, and 40 N), 4 different initial degrees of mouth opening (33.5, 30.5, 27.5, and 24.5 mm), and 3 different distances of travel of the mandible (4.5, 3.0, and 1.5 mm). We found that the bite force rapidly declined after the unloading, resulting in a small impact velocity of the lower front teeth. This impact velocity largely depended on the magnitude of the initial bite force and the distance traveled; it was barely sensitive to variations in degree of initial mouth opening. The maximal velocity of the lower teeth was 0.43 m/s (at an initial bite force of 100 N). This maximum was reached after a distance of travel of about 4 mm in 12 ms. The data suggest that the rapid decline in bite force coupled with a limitation of impact velocity is due to the force-velocity properties of the active jaw muscles and is not caused by neural control.",
keywords = "dentistry, tandheelkunde",
author = "T. Nagashima and Geranda Slager and E. Otten and M.L. Broekhuijsen and {van Willigen}, J.D.",
year = "1997",
month = "11",
day = "1",
doi = "10.1177/00220345970760110601",
language = "English",
volume = "76",
pages = "1751--1759",
journal = "Journal of dental research",
issn = "0022-0345",
publisher = "International Association for Dental Research",
number = "11",

}

Impact velocities of the teeth after a sudden unloading at various initial bite forces, degrees of mouth opening and distances of travel. / Nagashima, T.; Slager, Geranda; Otten, E.; Broekhuijsen, M.L.; van Willigen, J.D.

In: Journal of dental research, Vol. 76, No. 11, 01.11.1997, p. 1751-1759.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Impact velocities of the teeth after a sudden unloading at various initial bite forces, degrees of mouth opening and distances of travel.

AU - Nagashima, T.

AU - Slager, Geranda

AU - Otten, E.

AU - Broekhuijsen, M.L.

AU - van Willigen, J.D.

PY - 1997/11/1

Y1 - 1997/11/1

N2 - A potentially dangerous situation arises when an individual bites on hard and brittle food which suddenly breaks, since the impact velocity of the lower teeth onto the upper teeth after the food is broken can be high and may cause dental damage. The present experiments were designed to study the magnitude of the impact velocity after a sudden unloading at various initial bite forces, degrees of mouth opening, and distances of travel. Subjects were asked to perform a static biting task during which the resistance to the bite was suddenly removed. The upward mandible movement was arrested after a certain distance. The velocity of the lower teeth at impact was calculated just before the mandible came to a standstill in combinations of 4 different bite forces (100, 80, 60, and 40 N), 4 different initial degrees of mouth opening (33.5, 30.5, 27.5, and 24.5 mm), and 3 different distances of travel of the mandible (4.5, 3.0, and 1.5 mm). We found that the bite force rapidly declined after the unloading, resulting in a small impact velocity of the lower front teeth. This impact velocity largely depended on the magnitude of the initial bite force and the distance traveled; it was barely sensitive to variations in degree of initial mouth opening. The maximal velocity of the lower teeth was 0.43 m/s (at an initial bite force of 100 N). This maximum was reached after a distance of travel of about 4 mm in 12 ms. The data suggest that the rapid decline in bite force coupled with a limitation of impact velocity is due to the force-velocity properties of the active jaw muscles and is not caused by neural control.

AB - A potentially dangerous situation arises when an individual bites on hard and brittle food which suddenly breaks, since the impact velocity of the lower teeth onto the upper teeth after the food is broken can be high and may cause dental damage. The present experiments were designed to study the magnitude of the impact velocity after a sudden unloading at various initial bite forces, degrees of mouth opening, and distances of travel. Subjects were asked to perform a static biting task during which the resistance to the bite was suddenly removed. The upward mandible movement was arrested after a certain distance. The velocity of the lower teeth at impact was calculated just before the mandible came to a standstill in combinations of 4 different bite forces (100, 80, 60, and 40 N), 4 different initial degrees of mouth opening (33.5, 30.5, 27.5, and 24.5 mm), and 3 different distances of travel of the mandible (4.5, 3.0, and 1.5 mm). We found that the bite force rapidly declined after the unloading, resulting in a small impact velocity of the lower front teeth. This impact velocity largely depended on the magnitude of the initial bite force and the distance traveled; it was barely sensitive to variations in degree of initial mouth opening. The maximal velocity of the lower teeth was 0.43 m/s (at an initial bite force of 100 N). This maximum was reached after a distance of travel of about 4 mm in 12 ms. The data suggest that the rapid decline in bite force coupled with a limitation of impact velocity is due to the force-velocity properties of the active jaw muscles and is not caused by neural control.

KW - dentistry

KW - tandheelkunde

UR - https://www.ncbi.nlm.nih.gov/pubmed/9372792

UR - http://journals.sagepub.com/doi/pdf/10.1177/00220345970760110601

U2 - 10.1177/00220345970760110601

DO - 10.1177/00220345970760110601

M3 - Article

VL - 76

SP - 1751

EP - 1759

JO - Journal of dental research

JF - Journal of dental research

SN - 0022-0345

IS - 11

ER -