Maxillary protraction with and without maxillary expansion

A finite element analysis of sutural stresses

Pawan Gautam, Ashima Valiathan, Raviraj Adhikari

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Introduction: In this finite element study, we compared the stress patterns along the various craniofacial sutures with maxillary protraction with and without expansion. Methods: Two 3-dimensional analytic models were developed, 1 simulating maxillary protraction and the other simulating maxillary protraction with expansion. The model consisted of 108799 10 node solid 92 elements (tetrahedron), 193633 nodes, and 580899 degrees of freedom. Results: The overall stresses after maxillary protraction with maxillary expansion were significantly higher than with a facemask alone. The magnitude of stress on the craniofacial sutures with maxillary protraction alone was in the range of a few millinewtons per square millimeter, whereas, with maxillary protraction with maxillary expansion, the stresses ranged from a few newtons per square millimeter to a few hundred newtons per square millimeter. The pattern of stress distribution also differed with the 2 treatment modalities as did the sutures experiencing maximum and minimum stresses. Conclusions: The osteogenic potential of such low stresses after maxillary protraction can be questioned. High stresses generated in various craniofacial sutures after maxillary protraction with expansion are responsible for disrupting the circummaxillary sutural system and presumably facilitating the orthopedic effect of the facemask.

Original languageEnglish
Pages (from-to)361-366
Number of pages6
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume136
Issue number3
DOIs
Publication statusPublished - 01-09-2009

Fingerprint

Palatal Expansion Technique
Finite Element Analysis
Sutures
Orthopedics

All Science Journal Classification (ASJC) codes

  • Orthodontics

Cite this

@article{206eacc88bf84db9b7cd330ef51b972b,
title = "Maxillary protraction with and without maxillary expansion: A finite element analysis of sutural stresses",
abstract = "Introduction: In this finite element study, we compared the stress patterns along the various craniofacial sutures with maxillary protraction with and without expansion. Methods: Two 3-dimensional analytic models were developed, 1 simulating maxillary protraction and the other simulating maxillary protraction with expansion. The model consisted of 108799 10 node solid 92 elements (tetrahedron), 193633 nodes, and 580899 degrees of freedom. Results: The overall stresses after maxillary protraction with maxillary expansion were significantly higher than with a facemask alone. The magnitude of stress on the craniofacial sutures with maxillary protraction alone was in the range of a few millinewtons per square millimeter, whereas, with maxillary protraction with maxillary expansion, the stresses ranged from a few newtons per square millimeter to a few hundred newtons per square millimeter. The pattern of stress distribution also differed with the 2 treatment modalities as did the sutures experiencing maximum and minimum stresses. Conclusions: The osteogenic potential of such low stresses after maxillary protraction can be questioned. High stresses generated in various craniofacial sutures after maxillary protraction with expansion are responsible for disrupting the circummaxillary sutural system and presumably facilitating the orthopedic effect of the facemask.",
author = "Pawan Gautam and Ashima Valiathan and Raviraj Adhikari",
year = "2009",
month = "9",
day = "1",
doi = "10.1016/j.ajodo.2008.02.021",
language = "English",
volume = "136",
pages = "361--366",
journal = "American Journal of Orthodontics and Dentofacial Orthopedics",
issn = "0889-5406",
publisher = "Mosby Inc.",
number = "3",

}

Maxillary protraction with and without maxillary expansion : A finite element analysis of sutural stresses. / Gautam, Pawan; Valiathan, Ashima; Adhikari, Raviraj.

In: American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 136, No. 3, 01.09.2009, p. 361-366.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Maxillary protraction with and without maxillary expansion

T2 - A finite element analysis of sutural stresses

AU - Gautam, Pawan

AU - Valiathan, Ashima

AU - Adhikari, Raviraj

PY - 2009/9/1

Y1 - 2009/9/1

N2 - Introduction: In this finite element study, we compared the stress patterns along the various craniofacial sutures with maxillary protraction with and without expansion. Methods: Two 3-dimensional analytic models were developed, 1 simulating maxillary protraction and the other simulating maxillary protraction with expansion. The model consisted of 108799 10 node solid 92 elements (tetrahedron), 193633 nodes, and 580899 degrees of freedom. Results: The overall stresses after maxillary protraction with maxillary expansion were significantly higher than with a facemask alone. The magnitude of stress on the craniofacial sutures with maxillary protraction alone was in the range of a few millinewtons per square millimeter, whereas, with maxillary protraction with maxillary expansion, the stresses ranged from a few newtons per square millimeter to a few hundred newtons per square millimeter. The pattern of stress distribution also differed with the 2 treatment modalities as did the sutures experiencing maximum and minimum stresses. Conclusions: The osteogenic potential of such low stresses after maxillary protraction can be questioned. High stresses generated in various craniofacial sutures after maxillary protraction with expansion are responsible for disrupting the circummaxillary sutural system and presumably facilitating the orthopedic effect of the facemask.

AB - Introduction: In this finite element study, we compared the stress patterns along the various craniofacial sutures with maxillary protraction with and without expansion. Methods: Two 3-dimensional analytic models were developed, 1 simulating maxillary protraction and the other simulating maxillary protraction with expansion. The model consisted of 108799 10 node solid 92 elements (tetrahedron), 193633 nodes, and 580899 degrees of freedom. Results: The overall stresses after maxillary protraction with maxillary expansion were significantly higher than with a facemask alone. The magnitude of stress on the craniofacial sutures with maxillary protraction alone was in the range of a few millinewtons per square millimeter, whereas, with maxillary protraction with maxillary expansion, the stresses ranged from a few newtons per square millimeter to a few hundred newtons per square millimeter. The pattern of stress distribution also differed with the 2 treatment modalities as did the sutures experiencing maximum and minimum stresses. Conclusions: The osteogenic potential of such low stresses after maxillary protraction can be questioned. High stresses generated in various craniofacial sutures after maxillary protraction with expansion are responsible for disrupting the circummaxillary sutural system and presumably facilitating the orthopedic effect of the facemask.

UR - http://www.scopus.com/inward/record.url?scp=69249233612&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69249233612&partnerID=8YFLogxK

U2 - 10.1016/j.ajodo.2008.02.021

DO - 10.1016/j.ajodo.2008.02.021

M3 - Article

VL - 136

SP - 361

EP - 366

JO - American Journal of Orthodontics and Dentofacial Orthopedics

JF - American Journal of Orthodontics and Dentofacial Orthopedics

SN - 0889-5406

IS - 3

ER -