Effects of wear time differences of removable functional appliances in class II patients: prospective MRI study of TMJ and masticatory muscle changes

Cesur, Emre; Özdiler, Orhan; Köklü, Ayşegül; Orhan, Kaan; Seki, Umut

doi:10.1007/s11282-019-00379-0

Cited by 9 publications

(21 citation statements)

References 28 publications

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“…The aim of treatments utilizing functional appliances to correct Class II anomalies due to mandibular underdevelopment is to lengthen the mandible by inducing cell activity in the condylar cartilage. [1][2][3][4] In their study investigating the long-term effects of protrusive function, McNamara and Bryan 5 reported that mandibular length increased with remodeling of the posterior and postero-superior surfaces of the condyle. Contrary to these studies, other authors [6][7][8] reported that functional orthopedic treatment induced little change in the bony elements of the craniofacial system and argued that the effect was limited to the dentoalveolar region.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the effects of functional orthodontic treatment on mandibular osseous structure using fractal dimension analysis of dental panoramic radiographs

Cesur¹,

Bayrak²,

Kurşun-Çakmak³

et al. 2020

The Angle Orthodontist

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Objective To evaluate the effects of functional appliance treatment on mandibular trabecular structure using fractal dimension (FD) analysis of dental panoramic radiographs. Materials and Methods This study was conducted using digital panoramic radiographs of 45 patients with Class II malocclusion treated with functional appliances (treatment group, mean age: 11.39 ± 0.97 years; 23 girls, 22 boys) acquired before (T0) and after (T1) treatment and the panoramic radiographs of 45 control subjects who had undergone no orthodontic treatment (control group, mean age: 11.31 ± 0.87 years; 23 girls, 22 boys). FD values in the condylar process, mandibular corpus, and mandibular angle were analyzed from the panoramic radiographs of both groups. Results Analysis of changes in FD between T0 and T1 revealed significant increases in the FD values of the right and left condylar processes and right mandibular corpus in the treatment group (P < .001) and in the right condylar process in the control group (P < .05). Between-group comparisons demonstrated that the treatment group showed greater changes in the condylar process (right, P < .001; left, P < .05) and right mandibular corpus (P < .05) compared to controls. Correlation analysis between the cephalometric and FD changes in the treatment group showed the right condylar process changes were negatively correlated with GoGn/SN angle (P < .05) and positively correlated with Co-Go (P < .05), although these correlations were weak. Conclusions FD analysis demonstrated significant changes in trabeculation of the condyle and mandibular corpus in the treatment group compared to the control group. Functional appliance treatment may lead to skeletal correction by altering skeletal form and trabeculation of the mandibular bone.

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Section: Introductionmentioning

confidence: 99%

Evaluating the effects of functional orthodontic treatment on mandibular osseous structure using fractal dimension analysis of dental panoramic radiographs

Cesur¹,

Bayrak²,

Kurşun-Çakmak³

et al. 2020

The Angle Orthodontist

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“…SIRs on MRI provide a standardized way of measuring and comparing signal intensities of structures of interest from different patients and MRI scans 17 . A high signal intensity measurement of the disc and retrodiscal tissue is regarded as an objective sign of inflammation 18 . When there is inflammation of these structures, it is characterized by haemorrhagic infiltration and the appearance of newly formed capillaries 10 .…”

Section: Discussionmentioning

confidence: 99%

“…Brain grey matter (GM) and white matter (WM) were measured in order to normalize differences in signal intensity. SIR values were calculated by custom Java software (JBuilder 10.0; Embarcadero Technologies, Austin, Texas, USA), using the following formula: SIR = (SI measured À SI GM )/(SI WM À SI GM ) 17,18 . These values could then be compared to the respective synovitis grading scores of one arthroscopy observer to assess if the two methods showed a correlation when scoring inflammation in these structures.…”

Section: Arthroscopy and Mri Scoringmentioning

confidence: 99%

The agreement between magnetic resonance imaging and arthroscopic findings in temporomandibular joint disorders

Verhelst

Vervaeke

Orhan

et al. 2021

International Journal of Oral and Maxillofacial Surgery

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The aim of this retrospective observational study was to assess the potential agreement between independent magnetic resonance imaging (MRI) and arthroscopic findings and their respective contributions to a final diagnosis in patients with refractory temporomandibular joint disorders. Two dentomaxillofacial radiologists and two oral and maxillofacial surgeons scored 50 joints. All observers, who were blinded to additional clinical information, used a specific scoring form and selected one or more diagnostic labels. Agreement between MRI and arthroscopy and their contributions to the final diagnosis were assessed as primary outcomes using Fleiss' kappa. Intra-modality agreement and the correlation between signal intensity ratio (SIR) measurements on MRI and synovitis grading on arthroscopy were assessed as secondary outcomes. Agreement between MRI and arthroscopy was poor. A fair level of agreement was only reached for reduction capacity of the disc and disc perforation. Arthroscopic diagnostic labels matched better with the final diagnosis, suggesting a bigger contribution to that diagnosis. Higher SIR measurements correlated with higher synovitis grading scores for the retrodiscal tissue and the posterior band of the disc. Intra-modality agreement was better in arthroscopy. When blinded to clinical information, arthroscopy and MRI observations can lead to different conclusions. The diagnostic outcomes of both examinations should be considered and integrated into a final diagnosis.

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“…4). The advantages such as high diagnostic quality of MRI in the TMJ region, being pain-free and non-invasive, and no ionizing radiation to the patient have allowed it to be used for the evaluation of spatial changes occurring in the joint area with functional orthopedic treatment (Ruf and Pancherz, 1998;Pancherz et al, 1999;Ruf et al, 2002;Cesur et al, 2020). 2014) compared the efficacy of panoramic radiography, cephalometric radiography, MRI, CBCT and CT using cadaveric human heads in evaluating the length of the mandibular ramus and condylar process, and reported that all 3D imaging methods gave similar results.…”

Section: Magnetic Resonance Imaging (Mri)mentioning

confidence: 99%

Applications of Contemporary Imaging Modalities in Orthodontics

Cesur¹,

Orhan²

2021

J Exp Clin Med

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The validity of orthodontic diagnosis and treatment planning depends on the accuracy of the photos, models and radiograps to be obtained from the patient. One of the most important parts of diagnosis and treatment planning is the use of appropriate imaging method. Although lateral cephalometric radiographs are still the most preferred imaging method, other methods such as hand-wrist radiographs, panoramic radiographs, cone beam computerized tomography (CBCT), magnetic resonance imaging (MRI), and ultrasound are also frequently used. For this reason, it is important to know the advantages and disadvantages of all imaging methods for orthodontists in order to select the most suitable method for the patient.

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Effects of wear time differences of removable functional appliances in class II patients: prospective MRI study of TMJ and masticatory muscle changes

Cited by 9 publications

References 28 publications

Evaluating the effects of functional orthodontic treatment on mandibular osseous structure using fractal dimension analysis of dental panoramic radiographs

Evaluating the effects of functional orthodontic treatment on mandibular osseous structure using fractal dimension analysis of dental panoramic radiographs

The agreement between magnetic resonance imaging and arthroscopic findings in temporomandibular joint disorders

Applications of Contemporary Imaging Modalities in Orthodontics

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