<abstract xmlns="http://www.w3.org/1999/xhtml">

Objective: An orthodontic malocclusion may affect the temporomandibular joint structures in susceptible individuals. This study aims to investigate the bone density of the mandibular condyles in patients presenting with different dentofacial skeletal patterns.
Methods: Panoramic radiographs of 200 randomly selected patients with a skeletal and dental Class I, Class II division 1, Class II division 2 and Class III malocclusion were evaluated. Bone density of the right and left mandibular condyles was measured using fractal analysis.
Results: No significant difference was detected between the right and left condyles in the various malocclusion groups. However, post-hoc tests showed that Class I patients had significantly higher FD values than Class III and Class II division 1 patients in both right and left condyles following intergroup comparisons. The only significant difference between the genders was detected in the left condyle of Class II division 1 patients, as male patients were found to have significantly higher FD values than females.
Conclusions: The results of the present study showed that Class II division 1 and Class III patients displayed significantly lower fractal dimension (FD) values in their mandibular condyles when compared to Class I patients. This might be associated with the possible presence of a temporomandibular disorder in Class II division I patients which resulted in changes to condylar structure, and with less bone complexity in the temporomandibular joint of older Class III patients likely due to continued condylar growth.
</abstract>

Objective: An orthodontic malocclusion may affect the temporomandibular joint structures in susceptible individuals. This study aims to investigate the bone density of the mandibular condyles in patients presenting with different dentofacial skeletal patterns.
Methods: Panoramic radiographs of 200 randomly selected patients with a skeletal and dental Class I, Class II division 1, Class II division 2 and Class III malocclusion were evaluated. Bone density of the right and left mandibular condyles was measured using fractal analysis.
Results: No significant difference was detected between the right and left condyles in the various malocclusion groups. However, post-hoc tests showed that Class I patients had significantly higher FD values than Class III and Class II division 1 patients in both right and left condyles following intergroup comparisons. The only significant difference between the genders was detected in the left condyle of Class II division 1 patients, as male patients were found to have significantly higher FD values than females.
Conclusions: The results of the present study showed that Class II division 1 and Class III patients displayed significantly lower fractal dimension (FD) values in their mandibular condyles when compared to Class I patients. This might be associated with the possible presence of a temporomandibular disorder in Class II division I patients which resulted in changes to condylar structure, and with less bone complexity in the temporomandibular joint of older Class III patients likely due to continued condylar growth.

Evaluation of the trabecular structure of the mandibular condyles by fractal analysis in patients with different dentofacial skeletal patterns

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Objective: An orthodontic malocclusion may affect the temporomandibular joint structures in susceptible individuals. This study aims to investigate the bone...

Group	Side	FD (Mean ± SD)		p
Group	Side	Male	Female	p
Class I	Right	1.391 ± 0.076	1.419 ± 0.091	0.251
Class I	Left	1.368 ± 0.091	1.401 ± 0.087	0.201
Class II division 1	Right	1.358 ± 0.095	1.342 ± 0.089	0.543
Class II division 1	Left	1.368 ± 0.072	1.298 ± 0.089	0.004
Class II division 2	Right	1.394 ± 0.104	1.354 ± 0.107	0.181
Class II division 2	Left	1.348 ± 0.087	1.344 ± 0.108	0.869
Class III	Right	1.356 ± 0.097	1.312 ± 0.110	0.141
Class III	Left	1.346 ± 0.090	1.302 ± 0.087	0.083

Group	FD (Mean ± SD)		p
Group	Right TMJ	Left TMJ	p
Class I	1.405 ± 0.084	1.385 ± 0.090	0.257
Class II division 1	1.350 ± 0.092	1.333 ± 0.088	0.362
Class II division 2	1.375 ± 0.109	1.346 ± 0.100	0.174
Class III	1.334 ± 0.105	1.324 ± 0.090	0.609

Test	Right TMJ		Left TMJ
One-way ANOVA (p value)	0.002		0.007
Pairwise comparison by Tukey test (p value)	I-III	0.002	I-III	0.005
	I-II.1	0.026	I-II.1	0.027
	I-II.2	0.421	I-II.2	0.155
	II.2-III	0.157	II.2-III	0.623
	II.1-II.2	0.577	II.1-II.2	0.900
	II.1-III	0.850	II.1-III	0.956

Evaluation of the trabecular structure of the mandibular condyles by fractal analysis in patients with different dentofacial skeletal patterns

Article Category: research-article

Publié en ligne: 13 juil. 2021

Pages: 93 - 99

DOI: https://doi.org/10.21307/aoj-2021-010

© 2021 Yasemin Nur Korkmaz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Figure 2.

Figure 3.

Intragroup comparison of fractal dimensions between male and female patients using Student’s t-test.

Intragroup comparison of fractal dimensions between right and left condyles in skeletal Class I, II div 1, II div 2 and III groups using Student’s t-test.

Intergroup comparison of fractal dimensions using One-way ANOVA and post-hoc Tukey tests.