Mandibular prognathism

Cohen, Melvin I.

doi:10.1016/0002-9416(65)90049-7

Cited by 16 publications

(3 citation statements)

References 4 publications

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“…Several methods have been proposed for this type of prediction [2][3][4][5][6][7][8]. Wolford et al [9] and Proffit [10] presented the most systematic approaches, either by moving templates (template method) or by repositioning an overlay tracing of the patient's cephalogram (overlay method).…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing the Accuracy of Cephalometric Prediction of Soft Tissue Profile Changes Following Orthognathic Surgery

Kolokitha

Chatzistavrou²

2011

J. Maxillofac. Oral Surg.

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The cephalometric prediction of orthognathic treatment outcome is an important part of the surgical planning and the process of informed consent. The orthodontic and surgical changes must be described accurately prior to treatment in order to assess the treatment's feasibility, to optimize case management and to increase patient's understanding and acceptance of the recommended treatment. The aim of the present article was to investigate on the factors that could influence the accuracy of cephalometric prediction in planning orthognathic surgery. Review of the literature revealed that, besides factors directly related to the prediction method and its use, there exist a considerable number of factors which could affect significantly the accuracy of soft tissue response. These factors could be biological ones such as relapse, centre of mandibular rotation and individual variation in response to treatment and others such as gender, race, pre-operative soft tissue thickness and data bases for mean ratios of soft to hard tissue movement changes. Some of the factors affecting the accuracy of prediction of soft tissue response following orthognathic surgery are inevitable and there are others, difficult to control and predict. However, patients should be informed that predictions are only a guide, may not represent the actual result of the surgical outcome, and as such they should be implemented.

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Section: Introductionmentioning

confidence: 99%

Factors Influencing the Accuracy of Cephalometric Prediction of Soft Tissue Profile Changes Following Orthognathic Surgery

Kolokitha

Chatzistavrou²

2011

J. Maxillofac. Oral Surg.

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“…A much simpler and quicker technique of cutting round and repositioning segments of a tracing only was described by Cohen (1965), but as with sectional photographs, this method doesn't take into account the differential soft tissue movement within each cut section (Harradine and Birnie, 1985).…”

Section: Combined Cephalometric Tracings and Photographsmentioning

confidence: 99%

The Validity of 3dMD Vultus in Predicting Soft Tissue Morphology Following Orthognathic Surgery

Ullah

Turner

Khambay

2014

British Journal of Oral and Maxillofacial Surgery

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Objectives:To determine the validity of 3dMD Vultus in predicting soft tissue morphology following orthognathic surgery. Methods:Thirteen patients with a skeletal discrepancy that required surgical correction limited to a Le Fort I surgical advancement osteotomy were included within the study. These patients had previously undergone a CBCT scan immediately before surgery (T1) and 6 months after surgery (T2).To permit validation, hard and soft tissues were linked for each time point and the hard tissues superimposed on the cranial vault and base. Using 3dMD Vultus virtual surgery was carried out to position the mandible and maxilla at T1 to the post-surgical position at T2. The resulting 3D soft tissue prediction mesh was then compared to the actual soft tissue mesh at T2 by segmenting both meshes at distinct anatomically areas of the face. The absolute distance between meshes for each region was then calculated using a custom developed computer program.

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“…Historically, the first method to determine the amount of posterior movement of the mandible needed to produce satisfactory facial esthetics following mandibular surgery was described by Cohen [23]. A tracing of the maxilla, maxillary teeth, mandible, mandibular teeth, and soft tissue profile was made from the original cephalogram.…”

Section: Manual Methodsmentioning

confidence: 99%

Cephalometric Methods of Prediction in Orthognathic Surgery

Kolokitha

Topouzelis

2011

J. Maxillofac. Oral Surg.

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Over the past decade the growing number of adult patients seeking for orthodontic treatment made orthognathic surgery popular. Surgical and orthodontic techniques have developed to the point where combined orthodontic and surgical treatment is now feasible to manage dentofacial deformity problems very satisfactorily. The prediction of orthognathic treatment outcome is an important part of orthognathic planning and the process of patient' inform consent. The predicted results must be presented to the patients prior to treatment in order to assess the treatment's feasibility, optimize case management and increase patient understanding and acceptance of the recommended treatment. Cephalometrics is a routine part of the diagnosis and treatment planning process and also allows the clinician to evaluate changes following orthognathic surgery. Traditionally cephalometry has been employed manually; nowadays computerized cephalometric systems are very popular. Cephalometric prediction in orthognathic surgery can be done manually or by computers, using several currently available software programs, alone or in combination with video images. Both manual and computerized cephalometric prediction methods are two-dimensional and cannot fully describe three-dimensional phenomena. Today, three-dimensional prediction methods are available, such as three-dimensional computerized tomography (3DCT), 3D magnetic resonance imaging (3DMRI) and surface scan/cone-beam CT. The aim of this article is to present and discuss the different methods of cephalometric prediction of the orthognathic surgery outcome.

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Mandibular prognathism

Cited by 16 publications

References 4 publications

Factors Influencing the Accuracy of Cephalometric Prediction of Soft Tissue Profile Changes Following Orthognathic Surgery

Factors Influencing the Accuracy of Cephalometric Prediction of Soft Tissue Profile Changes Following Orthognathic Surgery

The Validity of 3dMD Vultus in Predicting Soft Tissue Morphology Following Orthognathic Surgery

Cephalometric Methods of Prediction in Orthognathic Surgery

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