Asymmetric maxillary expansion (AMEX) appliance for treatment of true unilateral posterior crossbite

Toroğlu, M. Serdar; Uzel, Erhan; Kayalioglu, Mustafa; Uzel, İ̇lter

doi:10.1067/mod.2002.125563

Cited by 29 publications

(26 citation statements)

References 38 publications

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“…Hicks 19 found that the molars on the affected side had greater palatal inclination than did those on the unaffected side. Toroglu et al 4 found that the affected buccal teeth were more vertical than on the unaffected side, and during asymmetric maxillary expansion, the angulation of the posterior teeth was balanced on both sides in a true unilateral posterior crossbite malocclusion. The molars had greater tipping (7.3u) on the affected side than on the unaffected side (2.5u).…”

Section: Discussionmentioning

confidence: 99%

“…To obtain this unilateral expansion, several designs, modifications, and surgical procedures have been suggested. 4,16,17 In this study, the ARME appliance was designed to strengthen the anchorage of the unaffected side by including, with the aid of an occlusal locking mechanism, the mandibular posterior teeth.…”

Section: Discussionmentioning

confidence: 99%

“…No previous orthodontic treatment or systemic disease. 4 Skeletal Class I (ANB 5 0u-4u), normal overbite (1 mm-3 mm), normal growth direction (SN-GoGn 5 26u-38u). 5 No amalgam filling or veneer crown.…”

Section: Methodsmentioning

confidence: 99%

“…[1][2][3] If conventional bilateral rapid maxillary expansion (RME) is used in the true unilateral posterior crossbite, undesirable overexpansion and buccal nonocclusion occur on the unaffected side. 4 To avoid these undesirable effects, Marshall et al 3 and Toroglu et al 4 recommended that the mandible be supported on the unaffected side. RME, in which heavy orthodontic force is transmitted to the maxilla through the teeth, is commonly used to correct maxillary posterior crossbite and constriction.…”

Section: Introductionmentioning

confidence: 99%

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Alveolar bone changes after asymmetric rapid maxillary expansion

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et al. 2014

The Angle Orthodontist

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Objective: To quantitatively evaluate the effects of asymmetric rapid maxillary expansion (ARME) on cortical bone thickness and buccal alveolar bone height (BABH), and to determine the formation of dehiscence and fenestration in the alveolar bone surrounding the posterior teeth, using conebeam computed tomography (CBCT). Materials and Methods: The CBCT records of 23 patients with true unilateral posterior skeletal crossbite (10 boys, 14.06 6 1.08 years old, and 13 girls, 13.64 6 1.32 years old) who had undergone ARME were selected from our clinic archives. The bonded acrylic ARME appliance, including an occlusal stopper, was used on all patients. CBCT records had been taken before ARME (T1) and after the 3-month retention period (T2). Axial slices of the CBCT images at 3 vertical levels were used to evaluate the buccal and palatal aspects of the canines, first and second premolars, and first molars. Paired samples and independent sample t-tests were used for statistical comparison. Results:The results suggest that buccal cortical bone thickness of the affected side was significantly more affected by the expansion than was the unaffected side (P , .05). ARME significantly reduced the BABH of the canines (P , .01) and the first and second premolars (P , .05) on the affected side. ARME also increased the incidence of dehiscence and fenestration on the affected side. Conclusions: ARME may quantitatively decrease buccal cortical bone thickness and height on the affected side. (Angle Orthod. 2015;85:799-805.)

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Alveolar bone changes after asymmetric rapid maxillary expansion

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Baka

İleri

et al. 2014

The Angle Orthodontist

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“…These appliances, however, produced orthodontic expansion or an undesirable bilateral expansion effect or revealed a need for asymmetric relapse after bilateral widening rather than orthopedic expansion. 2,8,9 To avoid these restrictions and undesirable effects, Marshall et al 2 recommended a bonded RME appliance that attempts to resist lateral movement on the normal side by incorporating an occlusal index into the acrylic.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric rapid maxillary expansion in true unilateral crossbite malocclusion: A prospective controlled clinical study

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Başçiftçi

2015

The Angle Orthodontist

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Objective: To investigate the short-term effects of the asymmetric rapid maxillary (ARME) appliance on the vertical, sagittal, and transverse planes in patients with true unilateral posterior crossbite. Materials and Methods: Subjects were divided into two groups. The treatment group was comprised of 21 patients with unilateral posterior crossbite (mean age 5 13.3 6 2.1 years). Members of this group were treated with the ARME appliance. The control group was comprised of 17 patients with Angle Class I who were kept under observation (mean age 5 12.3 6 0.8 years). Lateral and frontal cephalograms were taken before the expansion (T1), immediately after expansion (T2), and at postexpansion retention (T3) in the treatment group and at preobservation (T1) and postobservation (T2) in the control group. A total of 34 measurements were assessed on cephalograms. For statistical analysis, the Wilcoxon test and analysis of covariance were used. Results: The ARME appliance produced significant increases in nasal, maxillary base, upper arch, and lower arch dimensions (P , .01) and a clockwise rotation of the occlusal plane (P 5 .001). Conclusion: The ARME appliance created asymmetric increments in the transversal dimensions of the nose, maxilla, and upper arch in the short term. Asymmetric expansion therapy for subjects with unilateral maxillary deficiency may provide satisfactory outcomes in adolescents, with the exception of mandibular arch expansion. The triangular pattern of expansion caused clockwise rotation of the mandible and the occlusal plane and produced significant alterations in the vertical facial dimensions, whereas it created no displacement in maxilla in the sagittal plane. (Angle Orthod. 2015;85:245-252.)

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