Elimination of transverse dental compensation is critical for treatment of patients with severe facial asymmetry

Sekiya, Toshiko; Nakamura, Yoshiki; Oikawa, Takashi; Ishii, Hiroaki; Hirashita, Ayao; Seto, Kanichi

doi:10.1016/j.ajodo.2007.10.064

Cited by 33 publications

(20 citation statements)

References 7 publications

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“…3,11,12 Mandibular asymmetry should be described three-dimensionally using three angles: pitch, roll, and yaw. Pitch refers to the rotation of the object around the transverse axis, roll refers to the rotation of the object around the anteroposterior axis, and yaw refers to the rotation of the object around the vertical axis.…”

Section: Introductionmentioning

confidence: 99%

“…For patients with facial asymmetry, accurate diagnosis and surgical treatment planning and adequate removal of transverse dental compensations in the maxillary and mandibular arches is a requisite for successful management of facial asymmetry. [2][3][4] Traditionally, two-dimensional (2D) cephalometric radiographs, such as posteroanterior (PA) cephalograms and submentovertex radiographs, have been essential tools for evaluating facial asymmetry. In 2003, Kusayama et al 5 showed a high correlation between skeletal asymmetry and dental compensation by analyzing PA radiographs and three-dimensional (3D) dental models.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional analysis of molar compensation in patients with facial asymmetry and mandibular prognathism

Tyan

Park

Munkhshur

et al. 2015

The Angle Orthodontist

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Objective: To evaluate the characteristic transverse dental compensations in patients with facial asymmetry and mandibular prognathism and to compare features of dental compensations between two types of mandibular asymmetry using 3-dimensional (3D) cone-beam computed tomography (CBCT). Materials and Methods: Seventy-eight adult patients with skeletal Class I (control group; n 5 33; 19 men and 14 women) or skeletal Class III with facial asymmetry (experimental group; n 5 45; 23 men and 22 women) were included. The experimental group was subdivided into two groups according to the type of mandibular asymmetry: translation type (T-type; n 5 20) and roll type (R-type; n 5 19). CBCT images were acquired before orthodontic treatment and 3D analyses were performed. Results: The transverse dental distance was significantly different between the two groups only at the palatal root apex of the maxillary first molar (P , .05). In the experimental group, the first molar axes were compensated significantly on both arches except the maxillary nondeviated side. The vertical molar heights were different between the two groups only on the maxillary arch (P , .001). The R-type showed greater mandibular ramal length difference and menton deviation than the T-type (P , .001). In the R-type, transverse compensation of the maxillary first molars was more obvious than with the T-type, which resulted in canting in the maxillary occlusal plane. Conclusions: Mandibular asymmetry with prognathism showed a characteristic transverse dental compensation pattern. The mandibular asymmetry type influenced the amount and direction of molar compensation on the maxillary arch. (Angle Orthod. 2016;86:421-430.)

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-dimensional analysis of molar compensation in patients with facial asymmetry and mandibular prognathism

Tyan

Park

Munkhshur

et al. 2015

The Angle Orthodontist

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“…It is very important to understand the components of facial asymmetry in order to outline an accurate and effective treatment plan (7)(8)(9)(10). The analysis of posteroanterior cephalometric radiographs determines if the asymmetry is related to the maxilla, mandible or both, in the sagittal or transverse directions, and if the anomaly is also associated with dental compensations.…”

Section: Discussionmentioning

confidence: 99%

“…Most studies have demonstrated that transverse dental compensation is correlated with skeletal asymmetry (8,(10)(11)(12). Inclinations of the occlusal plane greater than 4 o and mentum deviations observed in the posteroanterior cephalograms are important characteristics to determine the presence and extension of facial asymmetry (13,14).…”

Section: Discussionmentioning

confidence: 99%

Orthodontic-surgical treatment of class III malocclusion with mandibular asymmetry

et al. 2011

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Class III skeletal malocclusion may present several etiologies, among which maxillary deficiency is the most frequent. Bone discrepancy may have an unfavorable impact on esthetics, which is frequently aggravated by the presence of accentuated facial asymmetries. This type of malocclusion is usually treated with association of Orthodontics and orthognathic surgery for correction of occlusion and facial esthetics. This report presents the treatment of a patient aged 15 years and 1 month with Class III skeletal malocclusion, having narrow maxilla, posterior open bite on the left side, anterior crossbite and unilateral posterior crossbite, accentuated negative dentoalveolar discrepancy in the maxillary arch, and maxillary and mandibular midline shift. Clinical examination also revealed maxillary hypoplasia, increased lower one third of the face, concave bone and facial profiles and facial asymmetry with mandibular deviation to the left side. The treatment was performed in three phases: presurgical orthodontic preparation, orthognathic surgery and orthodontic finishing. In reviewing the patient's final records, the major goals set at the beginning of treatment were successfully achieved, providing the patient with adequate masticatory function and pleasant facial esthetics.

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“…It is important to diagnose the components causing asymmetry to obtain satisfactory treatment results (3)(4)(5)(6). The analysis of posteroanterior cephalometric radiographs determines if the asymmetry is related to the maxilla, mandible, or both and if the anomaly is also associated with dental compensations (7).…”

Section: Discussionmentioning

confidence: 99%

Orthodontics-Surgery-Prosthodontics Teamwork

Yılmaz¹,

Küçükkeleş²,

Bakkalbaşı³

et al. 2016

Bezmialem Science

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The consciousness and expectations of orthodontic patients have evolved with the increasing esthetic requirements of the society. Therefore, interdisciplinary intervention is crucial to achieve better results. A 19-year-old female patient presenting with posterior cross-bite, anterior open-bite, and laterognathia applied for treatment with the chief complaint of her unpleasant general facial appearance. The treatment plan included surgically assisted rapid maxillary expansion (SARME), double jaw surgery, and prosthetic restoration of the anterior teeth. The corticotomy was performed under general anesthesia and was followed by SARME. After leveling, stainless steel wires were placed, and Class II elastics were used for the decompensation of incisor teeth inclination. During surgery, maxillary advancement and mandibular set back were performed. The laterognathia was corrected with the rotation of the maxilla and bone removal from the hypertrophic side of the mandibular corpus. Following the removal of the orthodontic appliances, home bleaching and prosthodontic rehabilitations were performed. The patient ended up with the ideal facial criteria and an esthetic smile after 18 months of treatment.

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Elimination of transverse dental compensation is critical for treatment of patients with severe facial asymmetry

Cited by 33 publications

References 7 publications

Three-dimensional analysis of molar compensation in patients with facial asymmetry and mandibular prognathism

Three-dimensional analysis of molar compensation in patients with facial asymmetry and mandibular prognathism

Orthodontic-surgical treatment of class III malocclusion with mandibular asymmetry

Orthodontics-Surgery-Prosthodontics Teamwork

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