Diagnostic group differences in temporomandibular joint energy densities

L. M. Gallo, L. R. Iwasaki, Y. M. Gonzalez, H. Liu, D. B. Marx, J. C. Nickel

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Objectives: Cartilage fatigue, due to mechanical work, may account for precocious development of degenerative joint disease in the temporomandibular joint (TMJ). This study compared energy densities (mJ/mm 3 ) in TMJs of three diagnostic groups. Setting and Sample Population: Sixty-eight subjects (44 women, 24 men) gave informed consent. Diagnostic criteria for temporomandibular disorders (DC/TMD) and imaging were used to group subjects according to presence of jaw muscle or joint pain (+P) and bilateral disk displacement (+DD). Material and Methods: Subjects (+P+DD, n = 16; -P+DD, n = 16; and -P-DD, n = 36) provided cone-beam computed tomography and magnetic resonance images, and jaw-tracking data. Numerical modeling was used to determine TMJ loads (F normal ). Dynamic stereometry was used to characterize individual-specific data of stress-field dynamics during 10 symmetrical jaw-closing cycles. These data were used to estimate tractional forces (F traction ). Energy densities were then calculated as W/Q (W = work done or mechanical energy input=tractional force × distance of stress-field translation, Q = volume of cartilage). anova and Tukey-Kramer post hoc analyses tested for intergroup differences. Results: Mean ± standard error energy density for the +P+DD group was 12.7 ± 1.5 mJ/mm 3 and significantly greater (all adjusted p < 0.04) when compared to -P+DD (7.4 ± 1.4 mJ/mm 3 ) and -P-DD (5.8 ± 0.9 mJ/mm 3 ) groups. Energy densities in -P+DD and -P-DD groups were not significantly different. Conclusion: Diagnostic group differences in energy densities suggest that mechanical work may be a unique mechanism, which contributes to cartilage fatigue in subjects with pain and disk displacement.

Original languageEnglish (US)
Pages (from-to)164-169
Number of pages6
JournalOrthodontics and Craniofacial Research
Volume18
Issue numberS1
DOIs
StatePublished - Apr 1 2015

Fingerprint

Temporomandibular Joint
Jaw
Cartilage
Fatigue
Temporomandibular Joint Disorders
Cone-Beam Computed Tomography
Myalgia
Arthralgia
Traction
Informed Consent
Osteoarthritis
Magnetic Resonance Spectroscopy
Pain
Population

Keywords

  • Cartilage
  • Fatigue
  • Human
  • Mechanics
  • Temporomandibular joint

ASJC Scopus subject areas

  • Orthodontics
  • Surgery
  • Oral Surgery
  • Otorhinolaryngology

Cite this

Gallo, L. M., Iwasaki, L. R., Gonzalez, Y. M., Liu, H., Marx, D. B., & Nickel, J. C. (2015). Diagnostic group differences in temporomandibular joint energy densities. Orthodontics and Craniofacial Research, 18(S1), 164-169. https://doi.org/10.1111/ocr.12074

Diagnostic group differences in temporomandibular joint energy densities. / Gallo, L. M.; Iwasaki, L. R.; Gonzalez, Y. M.; Liu, H.; Marx, D. B.; Nickel, J. C.

In: Orthodontics and Craniofacial Research, Vol. 18, No. S1, 01.04.2015, p. 164-169.

Research output: Contribution to journalArticle

Gallo, LM, Iwasaki, LR, Gonzalez, YM, Liu, H, Marx, DB & Nickel, JC 2015, 'Diagnostic group differences in temporomandibular joint energy densities', Orthodontics and Craniofacial Research, vol. 18, no. S1, pp. 164-169. https://doi.org/10.1111/ocr.12074
Gallo, L. M. ; Iwasaki, L. R. ; Gonzalez, Y. M. ; Liu, H. ; Marx, D. B. ; Nickel, J. C. / Diagnostic group differences in temporomandibular joint energy densities. In: Orthodontics and Craniofacial Research. 2015 ; Vol. 18, No. S1. pp. 164-169.
@article{02682454d662429788f8280aaae55a6f,
title = "Diagnostic group differences in temporomandibular joint energy densities",
abstract = "Objectives: Cartilage fatigue, due to mechanical work, may account for precocious development of degenerative joint disease in the temporomandibular joint (TMJ). This study compared energy densities (mJ/mm 3 ) in TMJs of three diagnostic groups. Setting and Sample Population: Sixty-eight subjects (44 women, 24 men) gave informed consent. Diagnostic criteria for temporomandibular disorders (DC/TMD) and imaging were used to group subjects according to presence of jaw muscle or joint pain (+P) and bilateral disk displacement (+DD). Material and Methods: Subjects (+P+DD, n = 16; -P+DD, n = 16; and -P-DD, n = 36) provided cone-beam computed tomography and magnetic resonance images, and jaw-tracking data. Numerical modeling was used to determine TMJ loads (F normal ). Dynamic stereometry was used to characterize individual-specific data of stress-field dynamics during 10 symmetrical jaw-closing cycles. These data were used to estimate tractional forces (F traction ). Energy densities were then calculated as W/Q (W = work done or mechanical energy input=tractional force × distance of stress-field translation, Q = volume of cartilage). anova and Tukey-Kramer post hoc analyses tested for intergroup differences. Results: Mean ± standard error energy density for the +P+DD group was 12.7 ± 1.5 mJ/mm 3 and significantly greater (all adjusted p < 0.04) when compared to -P+DD (7.4 ± 1.4 mJ/mm 3 ) and -P-DD (5.8 ± 0.9 mJ/mm 3 ) groups. Energy densities in -P+DD and -P-DD groups were not significantly different. Conclusion: Diagnostic group differences in energy densities suggest that mechanical work may be a unique mechanism, which contributes to cartilage fatigue in subjects with pain and disk displacement.",
keywords = "Cartilage, Fatigue, Human, Mechanics, Temporomandibular joint",
author = "Gallo, {L. M.} and Iwasaki, {L. R.} and Gonzalez, {Y. M.} and H. Liu and Marx, {D. B.} and Nickel, {J. C.}",
year = "2015",
month = "4",
day = "1",
doi = "10.1111/ocr.12074",
language = "English (US)",
volume = "18",
pages = "164--169",
journal = "Orthodontics and Craniofacial Research",
issn = "1601-6335",
publisher = "Wiley-Blackwell",
number = "S1",

}

TY - JOUR

T1 - Diagnostic group differences in temporomandibular joint energy densities

AU - Gallo, L. M.

AU - Iwasaki, L. R.

AU - Gonzalez, Y. M.

AU - Liu, H.

AU - Marx, D. B.

AU - Nickel, J. C.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Objectives: Cartilage fatigue, due to mechanical work, may account for precocious development of degenerative joint disease in the temporomandibular joint (TMJ). This study compared energy densities (mJ/mm 3 ) in TMJs of three diagnostic groups. Setting and Sample Population: Sixty-eight subjects (44 women, 24 men) gave informed consent. Diagnostic criteria for temporomandibular disorders (DC/TMD) and imaging were used to group subjects according to presence of jaw muscle or joint pain (+P) and bilateral disk displacement (+DD). Material and Methods: Subjects (+P+DD, n = 16; -P+DD, n = 16; and -P-DD, n = 36) provided cone-beam computed tomography and magnetic resonance images, and jaw-tracking data. Numerical modeling was used to determine TMJ loads (F normal ). Dynamic stereometry was used to characterize individual-specific data of stress-field dynamics during 10 symmetrical jaw-closing cycles. These data were used to estimate tractional forces (F traction ). Energy densities were then calculated as W/Q (W = work done or mechanical energy input=tractional force × distance of stress-field translation, Q = volume of cartilage). anova and Tukey-Kramer post hoc analyses tested for intergroup differences. Results: Mean ± standard error energy density for the +P+DD group was 12.7 ± 1.5 mJ/mm 3 and significantly greater (all adjusted p < 0.04) when compared to -P+DD (7.4 ± 1.4 mJ/mm 3 ) and -P-DD (5.8 ± 0.9 mJ/mm 3 ) groups. Energy densities in -P+DD and -P-DD groups were not significantly different. Conclusion: Diagnostic group differences in energy densities suggest that mechanical work may be a unique mechanism, which contributes to cartilage fatigue in subjects with pain and disk displacement.

AB - Objectives: Cartilage fatigue, due to mechanical work, may account for precocious development of degenerative joint disease in the temporomandibular joint (TMJ). This study compared energy densities (mJ/mm 3 ) in TMJs of three diagnostic groups. Setting and Sample Population: Sixty-eight subjects (44 women, 24 men) gave informed consent. Diagnostic criteria for temporomandibular disorders (DC/TMD) and imaging were used to group subjects according to presence of jaw muscle or joint pain (+P) and bilateral disk displacement (+DD). Material and Methods: Subjects (+P+DD, n = 16; -P+DD, n = 16; and -P-DD, n = 36) provided cone-beam computed tomography and magnetic resonance images, and jaw-tracking data. Numerical modeling was used to determine TMJ loads (F normal ). Dynamic stereometry was used to characterize individual-specific data of stress-field dynamics during 10 symmetrical jaw-closing cycles. These data were used to estimate tractional forces (F traction ). Energy densities were then calculated as W/Q (W = work done or mechanical energy input=tractional force × distance of stress-field translation, Q = volume of cartilage). anova and Tukey-Kramer post hoc analyses tested for intergroup differences. Results: Mean ± standard error energy density for the +P+DD group was 12.7 ± 1.5 mJ/mm 3 and significantly greater (all adjusted p < 0.04) when compared to -P+DD (7.4 ± 1.4 mJ/mm 3 ) and -P-DD (5.8 ± 0.9 mJ/mm 3 ) groups. Energy densities in -P+DD and -P-DD groups were not significantly different. Conclusion: Diagnostic group differences in energy densities suggest that mechanical work may be a unique mechanism, which contributes to cartilage fatigue in subjects with pain and disk displacement.

KW - Cartilage

KW - Fatigue

KW - Human

KW - Mechanics

KW - Temporomandibular joint

UR - http://www.scopus.com/inward/record.url?scp=84926467803&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84926467803&partnerID=8YFLogxK

U2 - 10.1111/ocr.12074

DO - 10.1111/ocr.12074

M3 - Article

C2 - 25865545

AN - SCOPUS:84926467803

VL - 18

SP - 164

EP - 169

JO - Orthodontics and Craniofacial Research

JF - Orthodontics and Craniofacial Research

SN - 1601-6335

IS - S1

ER -