Structural changes in the trabecular bone of the mandibular condyle of growing patients with sagittal jaw discrepancy treated with the twin‐block appliance

2021 ◽  
Author(s):  
Burçin Akan ◽  
Begüm Ünlü Kurşun
Keyword(s):  
Trabecular Bone ◽  
Structural Changes ◽  
Mandibular Condyle ◽  
Twin Block

Structural changes in trabecular bone in patients with hip fracture

1992 ◽  
Vol 17 ◽  
pp. 138 ◽  
Author(s):  
M.E.L. Duarte ◽  
R. Lauria ◽  
V.S. Gameiro
Keyword(s):  
Hip Fracture ◽  
Trabecular Bone ◽  
Structural Changes

A histomorphological investigation of the effect of cyclosporin on trabecular bone of the rat mandibular condyle

2001 ◽  
Vol 46 (12) ◽  
pp. 1105-1110 ◽  
Author(s):  
Earl Fu ◽  
Yao Dung Hsieh ◽  
Tai-Kum Mao ◽  
E.-Chin Shen
Keyword(s):  
Trabecular Bone ◽  
Mandibular Condyle

Characterization of Human Cortical and Trabecular Bone Structural Change by NMR and Micro-CT

2012 ◽  
Author(s):  
Qingwen Ni ◽  
Todd Bredbenner
Keyword(s):  
Trabecular Bone ◽  
Spin Relaxation ◽  
Structural Changes ◽  
Relaxation Times ◽  
Proton Nuclear Magnetic Resonance ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
T2 Relaxation ◽  
Ct Measurement

The techniques of low-field pulsed proton nuclear magnetic resonance (NMR) spin relaxation and Micro-CT are described for assessment of structural changes of human cortical and trabecular bone in vitro. The technique involves spin-spin relaxation measurement and inversion spin-spin spectral analysis methods for NMR. From NMR measurement, the CPMG T2 relaxation data can be inverted to T2 relaxation distribution and this distribution then can be transformed to a pore size distribution with the longer relaxation times corresponding to larger pores. In Micro-CT measurement, each trabecular bone specimen was individually scanned using a micro-computed tomography (micro-CT) system and 12 micron dimensionally-isotropic voxels were reconstructed. Due to the resolution limitation, Micro-CT measurement on cortical bone was not success, however, NMR measurement was success for both cortical and trabecular bones.

scholarly journals A Digital Model to Simulate Effects of Bone Architecture Variations on Texture at Spatial Resolutions of CT, HR-pQCT, and μCT Scanners

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
T. Lowitz ◽  
O. Museyko ◽  
V. Bousson ◽  
W. A. Kalender ◽  
J.-D. Laredo ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Texture Analysis ◽  
Cancellous Bone ◽  
Structural Changes ◽  
Bone Structure ◽  
Musculoskeletal Diseases ◽  
Digital Model ◽  
Bone Architecture ◽  
Reliable Determination ◽  
Texture Parameters

The quantification of changes in the trabecular bone structure induced by musculoskeletal diseases like osteoarthritis, osteoporosis, rheumatoid arthritis, and others by means of a texture analysis is a valuable tool which is expected to improve the diagnosis and monitoring of a disease. The reaction of texture parameters on different alterations in the architecture of the fine trabecular network and inherent imaging factors such as spatial resolution or image noise has to be understood in detail to ensure an accurate and reliable determination of the current bone state. Therefore, a digital model for the quantitative analysis of cancellous bone structures was developed. Five parameters were used for texture analysis: entropy, global and local inhomogeneity, local anisotropy, and variogram slope. Various generic structural changes of cancellous bone were simulated for different spatial resolutions. Additionally, the dependence of the texture parameters on tissue mineralization and noise was investigated. The present work explains changes in texture parameter outcomes based on structural changes originating from structure modifications and reveals that a texture analysis could provide useful information for a trabecular bone analysis even at resolutions below the dimensions of single trabeculae.

Trabecular bone ratio of the mandibular condyle according to the presence of teeth: a micro-CT study

2012 ◽  
Vol 34 (6) ◽  
pp. 519-526 ◽  
Author(s):  
D. Y. Choi ◽  
K. H. Sun ◽  
S. Y. Won ◽  
J. G. Lee ◽  
K. S. Hu ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Mandibular Condyle ◽  
Micro Ct

scholarly journals Evaluation of the effect of vitamin D3 on mandibular condyles in an ovariectomized mouse model: a micro-CT study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Szandra Körmendi ◽  
Bálint Vecsei ◽  
Szilvia Ambrus ◽  
Kaan Orhan ◽  
Csaba Dobó-Nagy
Keyword(s):  
Mouse Model ◽  
Trabecular Bone ◽  
Vitamin D3 ◽  
Sham Group ◽  
Mandibular Condyle ◽  
Bone Microstructure ◽  
Micro Ct ◽  
Trabecular Thickness ◽  
Ovariectomized Mouse ◽  
Significant Difference

Abstract Background This study aimed to investigate the effect of ovariectomy and vitamin D3 on bone microstructure; this effect was examined in three regions of interest at one femoral and two mandibular sampling sites bone in an ovariectomized mouse model. Methods Thirty-six week-old female mice were randomly divided into three groups: 10 subjects were given oral cholecalciferol (vitamin D3) daily for 6 weeks after undergoing bilateral ovariectomy (D3 group), while 10 ovariectomized subjects (OVX) and 10 subjects who underwent a sham operation (SHAM) received peanut oil daily during the investigation. After extermination, the left hemimandible and femur were removed and scanned by micro-CT. The bone micromorphology parameters were analyzed and the BMD was calculated. Results The bone volume fraction (BV/TV) was significantly lower in the trabecular bone of the mandibular condyle in the OVX group than in the SHAM and D3 groups. Also there was a significant difference between the SHAM and D3 groups. The specific bone surface (BS/BV) was significantly higher in the OVX and D3 groups than in the SHAM group. Trabecular thickness (Tb.Th) was significantly higher in the SHAM group, and the trabecular bone pattern factor (Tb.Pf) was significantly higher in the OVX group than in the other two groups. Bone mineral density (BMD) of the femur and the mandible was significantly lower in the OVX group than in the SHAM and D3 groups. Conclusions Our results show that ovariectomy causes a significantly weaker bone microstructure in the mandibular condyle, where the protective effect of vitamin D3 resulted in a partial resorption.

Sign in / Sign up

Export Citation Format

Share Document