Abstract
Objective: The aim of this study was to investigate whether labial tooth inclination and alveolar bone loss affect the moment per unit of force (Mt/F) in controlled tipping and consequent stresses on the periodontal ligament (PDL). Methods: Three-dimensional models (n = 20) of maxillary central incisors were created with different labial inclinations (5º, 10º, 15º, and 20º) and different amounts of alveolar bone loss (0, 2, 4, and 6 mm). The Mt/F necessary for controlled tipping (Mt/Fcont) and the principal stresses on the PDL were calculated for each model separately in a finite element analysis. Results: As labial inclination increased, Mt/Fcont and the length of the moment arm decreased. In contrast, increased alveolar bone loss caused increases in Mt/Fcont and the length of the moment arm. When Mt/F was near Mt/Fcont, increases in Mt/F caused compressive stresses to move from a predominantly labial apical region to a palatal apical position, and tensile stresses in the labial area moved from a cervical position to a mid-root position. Although controlled tipping was applied to the incisors, increases in alveolar bone loss and labial tooth inclination caused increases in maximum compressive and tensile stresses at the root apices. Conclusions: Increases in alveolar bone loss and labial tooth inclination caused increases in stresses that might cause root resorption at the root apex, despite the application of controlled tipping to the incisors.
| Original language | English |
|---|---|
| Pages (from-to) | 155-162 |
| Number of pages | 8 |
| Journal | Korean Journal of Orthodontics |
| Volume | 46 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2016 May |
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All Science Journal Classification (ASJC) codes
- Orthodontics
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Effect of labiolingual inclination of a maxillary central incisor and surrounding alveolar bone loss on periodontal stress : A finite element analysis. / Choi, Sung Hwan; Kim, Young Hoon; Lee, Kee Joon; Hwang, Chung Ju.
In: Korean Journal of Orthodontics, Vol. 46, No. 3, 05.2016, p. 155-162.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effect of labiolingual inclination of a maxillary central incisor and surrounding alveolar bone loss on periodontal stress
T2 - A finite element analysis
AU - Choi, Sung Hwan
AU - Kim, Young Hoon
AU - Lee, Kee Joon
AU - Hwang, Chung Ju
PY - 2016/5
Y1 - 2016/5
N2 - Objective: The aim of this study was to investigate whether labial tooth inclination and alveolar bone loss affect the moment per unit of force (Mt/F) in controlled tipping and consequent stresses on the periodontal ligament (PDL). Methods: Three-dimensional models (n = 20) of maxillary central incisors were created with different labial inclinations (5º, 10º, 15º, and 20º) and different amounts of alveolar bone loss (0, 2, 4, and 6 mm). The Mt/F necessary for controlled tipping (Mt/Fcont) and the principal stresses on the PDL were calculated for each model separately in a finite element analysis. Results: As labial inclination increased, Mt/Fcont and the length of the moment arm decreased. In contrast, increased alveolar bone loss caused increases in Mt/Fcont and the length of the moment arm. When Mt/F was near Mt/Fcont, increases in Mt/F caused compressive stresses to move from a predominantly labial apical region to a palatal apical position, and tensile stresses in the labial area moved from a cervical position to a mid-root position. Although controlled tipping was applied to the incisors, increases in alveolar bone loss and labial tooth inclination caused increases in maximum compressive and tensile stresses at the root apices. Conclusions: Increases in alveolar bone loss and labial tooth inclination caused increases in stresses that might cause root resorption at the root apex, despite the application of controlled tipping to the incisors.
AB - Objective: The aim of this study was to investigate whether labial tooth inclination and alveolar bone loss affect the moment per unit of force (Mt/F) in controlled tipping and consequent stresses on the periodontal ligament (PDL). Methods: Three-dimensional models (n = 20) of maxillary central incisors were created with different labial inclinations (5º, 10º, 15º, and 20º) and different amounts of alveolar bone loss (0, 2, 4, and 6 mm). The Mt/F necessary for controlled tipping (Mt/Fcont) and the principal stresses on the PDL were calculated for each model separately in a finite element analysis. Results: As labial inclination increased, Mt/Fcont and the length of the moment arm decreased. In contrast, increased alveolar bone loss caused increases in Mt/Fcont and the length of the moment arm. When Mt/F was near Mt/Fcont, increases in Mt/F caused compressive stresses to move from a predominantly labial apical region to a palatal apical position, and tensile stresses in the labial area moved from a cervical position to a mid-root position. Although controlled tipping was applied to the incisors, increases in alveolar bone loss and labial tooth inclination caused increases in maximum compressive and tensile stresses at the root apices. Conclusions: Increases in alveolar bone loss and labial tooth inclination caused increases in stresses that might cause root resorption at the root apex, despite the application of controlled tipping to the incisors.
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U2 - 10.4041/kjod.2016.46.3.155
DO - 10.4041/kjod.2016.46.3.155
M3 - Article
AN - SCOPUS:84969776657
VL - 46
SP - 155
EP - 162
JO - Korean Journal of Orthodontics
JF - Korean Journal of Orthodontics
SN - 2234-7518
IS - 3
ER -