Immediate changes in condylar position after rapid maxillary expansion

Melgaço, Camilo Aquino; Neto, José Columbano; Jurach, Estela Maris; Nojima, Matilde da Cunha Gonçalves; Nojima, Lincoln Issamu

doi:10.1016/j.ajodo.2014.01.024

Cited by 28 publications

(36 citation statements)

References 31 publications

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“…The following inclination of the mandibular condyle was obtained in grade by CT in a closed‐mouth: the horizontal condylar inclination angle formed between the long axis of the condyle and sagittal midline in the axial plane. Sagittal midline corresponds to the line passing through the basion and the crista galli apophysis 20,30‐32 (Figure 2). Sagittal condylar inclination: angle formed between the axis of the condyle and the tangent of the mandibular branch in the sagittal plane.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Association between temporomandibular joint disc position evaluated by magnetic resonance imaging and mandibular condyle inclination evaluated by computed tomography

Stefano

Guercio-Mónaco

Hernández-Andara³

et al. 2020

J of Oral Rehabilitation

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The temporomandibular joint (TMJ) is part of the craniofacial complex and is made up of a large number of structures and elements, making its operation complex, so that small alterations can cause a wide variety of functional problems. 1. These problems are known as temporomandibular disorders (TMD), a generic term covering a group of musculoskeletal and neuromuscular conditions that affect the TMJ, the masticatory muscles and all associated tissues. 2,3 AbstractTemporomandibular joint disc displacement is common in the world's population and could be associated with bone and functional characteristics of the temporomandibular joint. The aim of these study was to analyse the association between temporomandibular joint disc position evaluated by magnetic resonance imaging (MRI) and the inclination of the mandibular condyle evaluated by computed tomography (CT).One hundred and seventy temporomandibular joints (TMJ) were retrospectively analysed. The temporomandibular disc position was evaluated by MRI and classified into three types: normal (N), disc displacement with reduction (DDWR) and disc displacement without reduction (DDWoR). The mandibular condyle measurements evaluated by CT included horizontal, sagittal and coronal inclination. ANOVA followed by post hoc Tukey's test was used to evaluate the interaction between condylar inclination and disc position. There was an association between disc position and the horizontal and sagittal condylar inclination (P < .05). There are statistically significant differences in the mean of horizontal and sagittal inclination of the mandibular condyle between the DDWoR and the other disc positions (P = .002 and P = .004). Disc position was not statistical associated with coronal inclination of condyle (P > .05). These results indicate that the inclination of the mandibular condyle may be different in TMJ with various disc position. A more medial horizontal inclination and a more posterior sagittal inclination of the mandibular condyle are associated with DDWoR. K E Y W O R D Scomputed tomography, magnetic resonance imaging, mandibular condyle, temporomandibular joint, temporomandibular joint disc |The TMD are a major health problem, affecting more than 50% of the world's population at some point in their lives and usually occurs in children, youth and adults of all ages and gender. 4,5 TMD can be classified into two major categories: temporomandibular joint disorders and masticatory muscle disorders. 2,3 Among the disorders of the TMJ are the alterations of the intra-articular mobility and the disorders of the disc-condyle complex. 2,6 Disorders of the disc-condyle complex consist of an abnormal position of the articular disc with respect to the mandibular condyle and the articular eminence. [7][8][9] Abnormal disc position or disc displacement has often been diagnosed in patients of diverse populations and can occur even in the growing population and is considered to be a condition that may worsen over time. 10,11 It has been observed that disc displacement of the TMJ is ab...

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Section: Methodsmentioning

confidence: 99%

“…CC: condyle centre located in the axial plane at the intersection of the largest lateromedial diameter with the largest anteroposterior diameter. PLS: intersection of a tangent to the condyle's upper edge with a tangent to the condyle's side edge in the coronal section where the centre of the mandibular condyle is located 32 (Figure 4).…”

Section: Methodsmentioning

confidence: 99%

Association between temporomandibular joint disc position evaluated by magnetic resonance imaging and mandibular condyle inclination evaluated by computed tomography

Stefano

Guercio-Mónaco

Hernández-Andara³

et al. 2020

J of Oral Rehabilitation

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“…Of these, one study was eliminated because it was a protocol proposal to be followed in future studies, 15 one for evaluating pre-and post-intervention changes through gypsum models and bite registration, 16 one for assessing condylar change by means of zonograms, 17 and five studies were excluded since they examined patients who underwent slow maxillary expansion. 10,[18][19][20][21] Therefore, seven articles from the systematic search were included for qualitative analysis; [22][23][24][25][26][27][28] as well as one record found by hand search (n ¼ 1); 29 totaling eight articles included in this review ( Table 1). A quantitative analysis was not feasible given the heterogeneity in the methodology of the selected articles.…”

Section: Selection and Characteristics Of The Studiesmentioning

confidence: 99%

“…28 The sample size ranged from 10 patients 25 to 39 patients. 27 Regarding the method used to measure changes, three articles used MRI, of which two evaluated the articular disc, 23,24 and the other one evaluated remodeling of the head and the condylar branch. 22 Five articles evaluated the condylar position and articular spaces by means of tomography: two by conventional tomography 25,26 and three by cone beam tomography.…”

Section: Selection and Characteristics Of The Studiesmentioning

confidence: 99%

Effects of rapid maxillary expansion on temporomandibular joints:

Torres¹,

Lopes²,

Magno³

et al. 2020

The Angle Orthodontist

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Objective To evaluate the impact of rapid maxillary expansion (RME) on the condylar position, disc joint, joint space, and interarticular relationship in growing patients. Materials and Methods A systematic search was performed in nine databases. The clinical studies selected included those with pre- and post-magnetic resonance, conventional computed tomography or cone beam tomography in growing patients. Risk of bias assessment was performed using the Cochrane Collaboration tool for controlled clinical studies and National Heart, Lung, and Blood Institute (NHLBI) Quality Assessment for Before-After Studies With No Control Group. Results Initially, 4303 records were identified. Only eight studies fulfilled the criteria and were included in the qualitative analysis. Of those, two were controlled clinical studies with a risk of uncertain to high bias. The remaining papers had a low to moderate risk of bias. Results showed that RME in children and adolescents promoted the following: remodeling in the head and or condylar branch, changes in condylar position and joint space, maintenance of improved symmetry between the condyles, and no ability to modify the position or shape of the articular disc. Conclusions RME in growing patients is able, in the short term, to modify the condyle-fossa relationship but does not change the position or shape of the articular disc. The intercondylar symmetric relationship is maintained or improved. Although the NHLBI score shows low to moderate risk of bias, the clinical relevance of these review findings is limited by Cochrane and Grades of Recommendation, Assessment, Development and Evaluation scores.

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“…In this study we have modified the methodology of Melgaco et al 13 in two ways. First, the head orientation was not reestablished after land mark orientation.…”

Section: 8mentioning

confidence: 99%

3D CBCT Evaluation of Condyle Position in Skeletal Class I & Class III Growing Subjects

2018

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Introduction: Evaluation of temporo-mandibular joint (TMJ) anatomy and function is an essential part of orthodontic diagnosis and treatment planning. It has been hypothesized that dental and skeletal malocclusions alter the functional loading of TMJ which can affect joint morphology.Objective: Three dimensional (3D) evaluation of condylar position using CBCT in skeletal Class I and Class III growing subjects. Result: Paired t-Test revealed no significant difference between right and left sides of condyle in skeletal Class I as well as Class III subjects. Independent t-test and Mann-Whitney U test showed no significant difference between position of condyle in Class I and Class III subjects.Conclusion: 3D CBCT analysis shows no significant difference in condylar position of skeletal Class I and Class III subjects.

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Immediate changes in condylar position after rapid maxillary expansion

Cited by 28 publications

References 31 publications

Association between temporomandibular joint disc position evaluated by magnetic resonance imaging and mandibular condyle inclination evaluated by computed tomography

Association between temporomandibular joint disc position evaluated by magnetic resonance imaging and mandibular condyle inclination evaluated by computed tomography

Effects of rapid maxillary expansion on temporomandibular joints:

3D CBCT Evaluation of Condyle Position in Skeletal Class I & Class III Growing Subjects

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