Fractal dimension and lacunarity analysis of dental radiographs

ABSTRACTObjectives: The aim was to assess whether Fractal Dimension and Lacunarity analysis can discriminate patients having different mandibular cortical shape.Methods: Panoramic radiographs of 52 patients were evaluated for mandibular cortical index. Weighted Kappa between the observations were varying between 0.718-0.805. These radiographs were scanned and converted to binary images. Fractal Dimension and Lacunarity were calculated from the regions where best represents the cortical morphology.Results: It was found that there were statistically significant difference between the Fractal Dimension and Lacunarity of radiographs which were classified as having Cl 1 and Cl 2 (Fractal Dimension P:0.000; Lacunarity P:0.003); and Cl 1 and Cl 3 cortical morphology (Fractal Dimension P:0.008; Lacunarity P:0.001); but there was no statistically significant difference between Fractal Dimension and Lacunarity of radiographs which were classified as having Cl 2 and Cl 3 cortical morphology (Fractal Dimension P:1.000; Lacunarity P:0.758).Conclusions: FD and L can differentiate Cl 1 mandibular cortical shape from both Cl 2 and Cl 3 mandibular cortical shape but cannot differentiate Cl 2 from Cl 3 mandibular cortical shape on panoramic radiographs. (Eur J Dent 2008;2:283-290)

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Fractal dimension on dental radiographs

Dentomaxillofacial Radiology ◽

10.1038/sj.dmfr.4600630 ◽

2001 ◽

Vol 30 (5) ◽

pp. 270-275 ◽

Cited By ~ 45

Author(s):

A-M Bollen ◽

A Taguchi ◽

P P Hujoel ◽

L G Hollender

Keyword(s):

Fractal Dimension ◽

Dental Radiographs

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Systematic review with hierarchical clustering analysis for the fractal dimension in assessment of skeletal bone mineral density using dental radiographs

Oral Radiology ◽

10.1007/s11282-014-0188-y ◽

2014 ◽

Vol 31 (1) ◽

pp. 1-13 ◽

Cited By ~ 5

Author(s):

André Ferreira Leite ◽

Paulo Tadeu de Souza Figueiredo ◽

Hugo Caracas ◽

Rafael Sindeaux ◽

Ana Tereza Bittencourt Guimarães ◽

...

Keyword(s):

Bone Mineral Density ◽

Systematic Review ◽

Fractal Dimension ◽

Hierarchical Clustering ◽

Bone Mineral ◽

Clustering Analysis ◽

Hierarchical Clustering Analysis ◽

Mineral Density ◽

Dental Radiographs ◽

Skeletal Bone

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Variation of loading directions in mandibular trabecular bone determined from fractal dimension minimum using digital dental radiographs

International Congress Series ◽

10.1016/j.ics.2005.03.016 ◽

2005 ◽

Vol 1281 ◽

pp. 1412

Author(s):

Won-Jin Yi ◽

Min-Suk Heo ◽

Sam-Sun Lee ◽

Soon-Chul Choi ◽

Kyung-Hoe Huh ◽

...

Keyword(s):

Fractal Dimension ◽

Trabecular Bone ◽

Dental Radiographs

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Fractal dimension and lacunarity analysis of mandibular bone on digital panoramic radiographs of tobacco users

Journal of Dental Research Dental Clinics Dental Prospects ◽

10.34172/joddd.2021.024 ◽

2021 ◽

Vol 15 (2) ◽

pp. 140-146

Author(s):

Suman Basavarajappa ◽

Vijayalakshmi Konddajji Ramachandra ◽

Shrawan Kumar

Keyword(s):

Fractal Dimension ◽

Trabecular Bone ◽

Control Group ◽

Healthy Controls ◽

Control Groups ◽

Panoramic Radiographs ◽

Significant Difference ◽

The Mean ◽

And Control ◽

Lacunarity Analysis

Background. This study aimed to evaluate and compare changes in the mandibular trabecular bone pattern using the fractal dimension (FD) and lacunarity analysis in tobacco users with healthy controls. Methods. This study was carried out on digital panoramic radiographs of 225 subjects divided into three groups: smokeless tobacco users (SLTs), smokers, and control (n=75). ImageJ program with FracLac plugin was used to assess the FD and lacunarity of mandibular trabecular bone on the digital panoramic radiographs. Results. The differences in the mean FD values of the study and control groups were statistically significant (P<0.001). Mean FD was lower in the case groups than the control group, with SLTs having the least FD value. A significant difference in lacunarity was noted between SLTs and controls (P<0.001). On the contrary, there was no significant difference in lacunarity between smokers and controls. Conclusions. FD values were lower in tobacco users, suggesting that tobacco users have a less complex trabecular bone pattern than healthy controls. Higher lacunarity values in SLTs indicated a more heterogeneous bone pattern. These findings signify that FD and lacunarity analysis on digital panoramic radiographs can serve as promising predictive tools to assess bone quality for osteoporotic changes in tobacco users, thereby facilitating prompt referral for further management.

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APPLICABILITY OF FRACTAL DIMENSION ANALYSIS IN DENTAL RADIOGRAPHS FOR THE EVALUATION OF RENAL OSTEODYSTROPHY

Fractals ◽

10.1142/s0218348x16500109 ◽

2016 ◽

Vol 24 (01) ◽

pp. 1650010 ◽

Cited By ~ 2

Author(s):

MAURÍCIO ANDERSON FERNANDES ◽

EDVALDO ANTÔNIO RIBEIRO ROSA ◽

ALINE CRISTINA BATISTA RODRIGUES JOHANN ◽

ANA MARIA TRINDADE GRÉGIO ◽

PAULA CRISTINA TREVILATTO ◽

...

Keyword(s):

Fractal Dimension ◽

Renal Osteodystrophy ◽

Chronic Renal Disease ◽

Regions Of Interest ◽

Mandibular Angle ◽

Digital Tool ◽

Dimension Analysis ◽

Mandibular Body ◽

Fractal Dimension Analysis ◽

Dental Radiographs

Objectives: To test the capacity of the digital tool, fractal dimension (FD) analysis, in identifying subtle differences in bone pattern in patients with renal osteodystrophy (RO), correlated with the time of hemodialysis, in different regions of interest, delineated on panoramic and periapical radiographs. Study design: A total of 34 patients with chronic renal disease undergoing hemodialysis were submitted to panoramic and periapical radiographs. Different regions of interest were delineated on the mandibular body and ramus. FD was analyzed by means of the software program ImageJ and correlated with the time of hemodialysis. Results: The sample consisted of 34 subjects. The time of hemodialysis varied from 1 to 286 months. There was significant correlation between the time of hemodialysis and the FD values in the region delineated in the mandibular angle ([Formula: see text]) and this was shown in the periapical radiographs as well ([Formula: see text]). Conclusions: FD analysis was a useful tool in detecting alterations caused by RO in bone pattern, in panoramic and periapical radiographs.

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