Relationship between temporomandibular joint internal derangement and facial asymmetry in women

Ahn, Sug-Joon; Lee, Seung–Pyo; Nahm, Dong-Seok

doi:10.1016/j.ajodo.2004.06.038

Cited by 70 publications

(59 citation statements)

References 18 publications

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“…Only subjects with bilateral normal disk status (BN), bilateral disk displacement with reduction (DDR), and bilateral disk displacement without reduction (DDNR) were included in this study, because possible dentofacial changes associated with unilateral ID would have been obscured by the averaging of right and left landmarks used in determining their locations. 15 All cephalograms were traced by a single investigator and recorded using a digitizer with a desktop computer. Twenty-one landmarks were digitized on each radiograph, from which 35 variables were calculated.…”

Section: Methodsmentioning

confidence: 99%

Dentofacial characteristics of women with oversized mandible and temporomandibular joint internal derangement

Moon¹,

Yang²,

Ahn³

2011

The Angle Orthodontist

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Introduction: To analyze dentofacial characteristics of temporomandibular joint internal derangement (TMJ ID) in orthodontic patients with oversized mandible (skeletal Class III pattern). Materials and Methods: The sample consisted of 66 women whose mandibular body length to anterior cranial base ratio is greater than 1.12. They were divided into three groups based on magnetic resonance images of bilateral TMJs: bilateral normal disk position (BN), bilateral disk displacement with reduction (DDR), and bilateral disk displacement without reduction (DDNR). Thirty-five cephalometric variables regarding their lateral cephalograms were analyzed by KruskalWallis test to evaluate differences in dentofacial morphology among the three groups. Results: Subjects with TMJ ID had a clockwise rotation of the ramus, with backward position of mandible, labial tipping of mandibular incisors, and protrusion of upper and lower lips. However, TMJ ID did not significantly influence vertical skeletal relationships. Most of the significant dentofacial changes were found between BN and DDR, and dentofacial changes between DDR and DDNR were minimal. Conclusions: This study suggests that dentofacial changes associated with TMJ ID begin to appear when TMJ ID develops to DDR from BN in patients with oversized mandible. (Angle Orthod. 2011;81:469-477.)

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Section: Methodsmentioning

confidence: 99%

Dentofacial characteristics of women with oversized mandible and temporomandibular joint internal derangement

Moon¹,

Yang²,

Ahn³

2011

The Angle Orthodontist

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“…16 Facial asymmetry can be easily assessed on posteroanterior cephalograms using the analysis described by Reyneke, 17 based on constructed triangles.…”

Section: Introductionmentioning

confidence: 99%

Posteroanterior cephalometric changes in subjects with temporomandibular joint disorders

Almășan

Băciuţ²,

Hedeșiu³

et al. 2013

Dentomaxillofacial Radiology

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Objectives: The aim of the study was to establish the changes in posteroanterior cephalometric variables in subjects with temporomandibular joint disorders (TMDs). Methods: Posteroanterior cephalograms of 61 subjects (age range 16-36.6 years, standard deviation 4.88 years) were used to determine cephalometric differences. Subjects were classified according to the Research Diagnostic Criteria for Temporomandibular Joint Disorders into three groups: unilateral TMD, bilateral TMD and no TMD. 14 linear and angular measurements were assessed on the posteroanterior cephalogram. For assessing facial asymmetry, the asymmetry index for bilateral measurements was calculated between the right and the left side. In cases with unilateral TMD, the asymmetry index was calculated using the difference between the unaffected and affected side. The differences among multiple groups were analysed using the one-way analysis of variance test and Scheffé post hoc test. Results: 47 subjects were females (77%) and 14 were males (23%). 19 subjects had unilateral TMDs and 16 subjects had bilateral TMDs. The asymmetry index of the distance from the horizontal plane to the antegonion was higher in subjects with unilateral TMD than in patients with bilateral or no TMD (p , 0.05). Also, the asymmetry index of the distances from the vertical plane to the condyle (p 5 0.05), gonion (Go) (p 5 0.0004), antegonion (p 5 0.002) and chin (Ch) (p 5 0.02) was higher in subjects with unilateral TMDs. The asymmetry index of the O point-Go-Go9 and O point-Ch-Ch9 angles differed significantly in subjects with unilateral TMDs (p , 0.05). Conclusions: Unilateral TMDs are associated with changes in posteroanterior cephalometric measurements. The assessment of posteroanterior cephalometric variables could be used as a key factor for evaluating the presence of TMDs.

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“…It has been also called hemimandibular hypertrophy (2), temporomandibular joint (TMJ) condylar hyperplasia (3) and hypercondylia (4). CH is a distinct, unilateral disorder characterized by diffuse enlargement of the condyle, the condylar neck and the ramus and body of the mandible, thus affecting facial symmetry and occlusion, and may be associated with pain and dysfunction (1).…”

Section: Introductionmentioning

confidence: 99%

Two-Stage Treatment of Facial Asymmetry Caused by Unilateral Condylar Hyperplasia

et al. 2014

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Condylar hyperplasia (CH) is a rare, self-limiting process manifesting between the first and third decades of life. CH causes facial asymmetry and derangement of the occlusion. Management involves resection of the condylar head and orthognathic surgery. This paper describes the case of a 37-year-old woman with spontaneous onset of CH over a span of approximately 25 years. The condition was managed with resection of the condyle alone, which dramatically improved facial asymmetry and altered the occlusion within a few months of follow up. Orthodontic treatment was then carried out and the patient underwent orthognathic surgery after 3 years. The patient is currently satisfied with her appearance and function and there are no signs of recurrence. T w o -S t a g e T r e a t m e n t o f F a c i a l A s y m m e t r y C a u s e d b y Unilateral Condylar Hyperplasia

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Relationship between temporomandibular joint internal derangement and facial asymmetry in women

Cited by 70 publications

References 18 publications

Dentofacial characteristics of women with oversized mandible and temporomandibular joint internal derangement

Dentofacial characteristics of women with oversized mandible and temporomandibular joint internal derangement

Posteroanterior cephalometric changes in subjects with temporomandibular joint disorders

Two-Stage Treatment of Facial Asymmetry Caused by Unilateral Condylar Hyperplasia

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