Human temporomandibular joint eminence shape and load minimization

L. R. Iwasaki, M. J. Crosby, David B Marx, Y. Gonzalez, W. D. McCall, R. Ohrbach, J. C. Nickel

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Analysis of previous data suggested the hypothesis that temporomandibular joint (TMJ) eminence shapes develop ideally to minimize joint loads. Hence, we tested this hypothesis in nine females and eight males in each of two groups, with and without TMJ disc displacement. Participants provided anatomical data used in a joint load minimization numerical model to predict, and jaw-tracking data used to measure, eminence shapes. Coordinate data (x,y) of shapes were fit to third-order polynomials for two sessions, sides, and methods (predicted, measured) for each participant. Inter-session data were reliable and averaged. Those with, compared with those without, disc displacement had higher measured shape range (5:1) and left-right asymmetry prevalence (4:1). In 29 symmetrical individuals, ANCOVA and Bonferroni tests compared vertical dimensions (y) at 11 posteroanterior points (x), 0.5 mm apart. Model-predicted and measured shapes were significantly different (P ≤ 0.01) near the eminence crest, but joint load minimization was consistent with eminence shape for x < 3.0 mm.

Original languageEnglish (US)
Pages (from-to)722-727
Number of pages6
JournalJournal of Dental Research
Volume89
Issue number7
DOIs
StatePublished - Jul 1 2010

Fingerprint

Temporomandibular Joint
Joints
Temporomandibular Joint Disc
Vertical Dimension
Jaw

Keywords

  • Human
  • Jaw tracking
  • Numerical modeling
  • TMJ

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Iwasaki, L. R., Crosby, M. J., Marx, D. B., Gonzalez, Y., McCall, W. D., Ohrbach, R., & Nickel, J. C. (2010). Human temporomandibular joint eminence shape and load minimization. Journal of Dental Research, 89(7), 722-727. https://doi.org/10.1177/0022034510364492

Human temporomandibular joint eminence shape and load minimization. / Iwasaki, L. R.; Crosby, M. J.; Marx, David B; Gonzalez, Y.; McCall, W. D.; Ohrbach, R.; Nickel, J. C.

In: Journal of Dental Research, Vol. 89, No. 7, 01.07.2010, p. 722-727.

Research output: Contribution to journalArticle

Iwasaki, LR, Crosby, MJ, Marx, DB, Gonzalez, Y, McCall, WD, Ohrbach, R & Nickel, JC 2010, 'Human temporomandibular joint eminence shape and load minimization', Journal of Dental Research, vol. 89, no. 7, pp. 722-727. https://doi.org/10.1177/0022034510364492
Iwasaki LR, Crosby MJ, Marx DB, Gonzalez Y, McCall WD, Ohrbach R et al. Human temporomandibular joint eminence shape and load minimization. Journal of Dental Research. 2010 Jul 1;89(7):722-727. https://doi.org/10.1177/0022034510364492
Iwasaki, L. R. ; Crosby, M. J. ; Marx, David B ; Gonzalez, Y. ; McCall, W. D. ; Ohrbach, R. ; Nickel, J. C. / Human temporomandibular joint eminence shape and load minimization. In: Journal of Dental Research. 2010 ; Vol. 89, No. 7. pp. 722-727.
@article{b496d24cbefd4766ac42ca654c42c50b,
title = "Human temporomandibular joint eminence shape and load minimization",
abstract = "Analysis of previous data suggested the hypothesis that temporomandibular joint (TMJ) eminence shapes develop ideally to minimize joint loads. Hence, we tested this hypothesis in nine females and eight males in each of two groups, with and without TMJ disc displacement. Participants provided anatomical data used in a joint load minimization numerical model to predict, and jaw-tracking data used to measure, eminence shapes. Coordinate data (x,y) of shapes were fit to third-order polynomials for two sessions, sides, and methods (predicted, measured) for each participant. Inter-session data were reliable and averaged. Those with, compared with those without, disc displacement had higher measured shape range (5:1) and left-right asymmetry prevalence (4:1). In 29 symmetrical individuals, ANCOVA and Bonferroni tests compared vertical dimensions (y) at 11 posteroanterior points (x), 0.5 mm apart. Model-predicted and measured shapes were significantly different (P ≤ 0.01) near the eminence crest, but joint load minimization was consistent with eminence shape for x < 3.0 mm.",
keywords = "Human, Jaw tracking, Numerical modeling, TMJ",
author = "Iwasaki, {L. R.} and Crosby, {M. J.} and Marx, {David B} and Y. Gonzalez and McCall, {W. D.} and R. Ohrbach and Nickel, {J. C.}",
year = "2010",
month = "7",
day = "1",
doi = "10.1177/0022034510364492",
language = "English (US)",
volume = "89",
pages = "722--727",
journal = "Journal of Dental Research",
issn = "0022-0345",
publisher = "SAGE Publications Inc.",
number = "7",

}

TY - JOUR

T1 - Human temporomandibular joint eminence shape and load minimization

AU - Iwasaki, L. R.

AU - Crosby, M. J.

AU - Marx, David B

AU - Gonzalez, Y.

AU - McCall, W. D.

AU - Ohrbach, R.

AU - Nickel, J. C.

PY - 2010/7/1

Y1 - 2010/7/1

N2 - Analysis of previous data suggested the hypothesis that temporomandibular joint (TMJ) eminence shapes develop ideally to minimize joint loads. Hence, we tested this hypothesis in nine females and eight males in each of two groups, with and without TMJ disc displacement. Participants provided anatomical data used in a joint load minimization numerical model to predict, and jaw-tracking data used to measure, eminence shapes. Coordinate data (x,y) of shapes were fit to third-order polynomials for two sessions, sides, and methods (predicted, measured) for each participant. Inter-session data were reliable and averaged. Those with, compared with those without, disc displacement had higher measured shape range (5:1) and left-right asymmetry prevalence (4:1). In 29 symmetrical individuals, ANCOVA and Bonferroni tests compared vertical dimensions (y) at 11 posteroanterior points (x), 0.5 mm apart. Model-predicted and measured shapes were significantly different (P ≤ 0.01) near the eminence crest, but joint load minimization was consistent with eminence shape for x < 3.0 mm.

AB - Analysis of previous data suggested the hypothesis that temporomandibular joint (TMJ) eminence shapes develop ideally to minimize joint loads. Hence, we tested this hypothesis in nine females and eight males in each of two groups, with and without TMJ disc displacement. Participants provided anatomical data used in a joint load minimization numerical model to predict, and jaw-tracking data used to measure, eminence shapes. Coordinate data (x,y) of shapes were fit to third-order polynomials for two sessions, sides, and methods (predicted, measured) for each participant. Inter-session data were reliable and averaged. Those with, compared with those without, disc displacement had higher measured shape range (5:1) and left-right asymmetry prevalence (4:1). In 29 symmetrical individuals, ANCOVA and Bonferroni tests compared vertical dimensions (y) at 11 posteroanterior points (x), 0.5 mm apart. Model-predicted and measured shapes were significantly different (P ≤ 0.01) near the eminence crest, but joint load minimization was consistent with eminence shape for x < 3.0 mm.

KW - Human

KW - Jaw tracking

KW - Numerical modeling

KW - TMJ

UR - http://www.scopus.com/inward/record.url?scp=77953759606&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953759606&partnerID=8YFLogxK

U2 - 10.1177/0022034510364492

DO - 10.1177/0022034510364492

M3 - Article

VL - 89

SP - 722

EP - 727

JO - Journal of Dental Research

JF - Journal of Dental Research

SN - 0022-0345

IS - 7

ER -