Correction of mandibular prognathism by double-oblique intraoral osteotomy: A new technique

Wilbanks, James L.

doi:10.1016/0030-4220(71)90154-x

Cited by 14 publications

(1 citation statement)

References 4 publications

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“…According to the location of the sagittal jaw problem in adult skeletal Class III cases, orthognathic surgical treatment is accomplished by a mandibular setback, a maxillary advancement, or a combination of both. The two most frequently used operations to correct mandibular prognathism are the sagittal split ramus osteotomy (SSRO) (13, 14) and the intraoral vertical ramus osteotomy (IVRO) (15–17). Both are suitable for patients in whom a desirable occlusal relationship can be obtained with setback of the mandible, each having its own advantages.…”

Section: Introductionmentioning

confidence: 99%

Craniofacial morphometric analysis of mandibular prognathism

Chang

Liu

Yang

et al. 2006

J of Oral Rehabilitation

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The purpose of this study was to provide more information about the morphological characteristics of the craniofacial complex in mandibular prognathism. Forty young adult males having mandibular prognathism were compared with 40 having normal occlusion. This was conducted to carry out geometric morphometric assessments to localize alterations, using Procrustes analysis and thin-plate spline analysis, in addition to conventional cephalometric techniques. Procrustes analysis indicated that the mean craniofacial, midfacial and mandibular morphology was significantly different in prognathic subjects compared with normal controls. This finding was corroborated by the multivariate Hotelling T(2)-test of cephalometric variables. Mandibular prognathism demonstrated a shorter and slightly retropositioned maxilla, a greater total length and anterior positioning of the mandible. Thin-plate spline analysis revealed a developmental diminution of the palatomaxillary region anteroposteriorly and a developmental elongation of the mandible anteroposteriorly, leading to the appearance of a prognathic mandibular profile. In conclusion, thin-plate spline analysis seems to provide a valuable supplement for conventional cephalometric analysis because the complex patterns of craniofacial shape change are visualized suggestive by means of grid deformations.

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Section: Introductionmentioning

confidence: 99%

Craniofacial morphometric analysis of mandibular prognathism

Chang

Liu

Yang

et al. 2006

J of Oral Rehabilitation

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Surgical treatment of mandibular prognathism in collaboration with orthodontic treatment in Korea

Park

Yoo²,

Park³

1994

Aesth. Plast. Surg.

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Mandibular prognathism is defined by John Hunter as follows: "The lower jaw projecting too far forward so that the foreteeth pass before those of the upper jaw, therefore disfigurement and malocclusion are two of the main facial characteristics." Other distinguishing features are the coexistence of class III malocclusion, incomplete closure of lip, deviation of the midline, and decrease of labiomental fold. Generally, the functional occlusal relationship and balanced facial harmony cannot be obtained by surgical or orthodontic treatment alone. Its success depends on careful conjoint, supplementary diagnostic, and treatment planning. As a cardinal principle the authors made the following combined surgical and orthodontic treatment plans: (1) Orthodontic treatment relocates and decompensates the malpositioned teeth (remove the masking effect of teeth) and, therefore, skeletal deformity is exposed maximally. (2) Surgical treatment eliminates the maximally exposed skeletal defect. Therefore, dramatic facial balance and functional occlusal relationship are obtained. Treatment planning includes the pre- and postoperative orthodontic treatment, lateral cephalometric prediction tracing (LCPT), and model surgery with dental cast. The authors made it easy with the use of an acrylic dental wafer to coordinate exact occlusal relationship after surgery. We treated mandibular prognathism by using Dautrey's modification of the sagittal split ramus osteotomy (SSRO) (10 cases) and intraoral vertical ramus osteotomy (IVRO) (5 cases) and sometimes additional genioplasty (2 cases). IVRO was used in those cases where (1) the amount of setback was more than 10 mm and (2) where there was a flat gonial angle.(ABSTRACT TRUNCATED AT 250 WORDS)

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