Surgical prediction of skeletal and soft tissue changes in treatment of Class II

Lira, Ana de Lourdes Sá de; Moura, Walter Leal de; Artese, Flávia; Bittencourt, Marcos Alan Vieira; Nojima, Lincoln Issamu

doi:10.1016/j.jcms.2012.07.009

Cited by 11 publications

(4 citation statements)

References 19 publications

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“…A similar result of low prediction accuracy for the lower lip region is reported by Pektas et al [11]. Conversely, two articles affirmed that the statistical differences between Dolphin soft tissue prediction and the real outcome of the patient did not invalidate the software prediction, as it was close to real surgical results [12,13].…”

Section: Discussionsupporting

confidence: 65%

“…In both groups, surgeries have been more extensive than planned; facial convexity and the distance between the lips and the cranial base presented similar values between t2 and t3. The conclusion of the authors was that statistical differences in the considered measurements did not invalidate surgical prediction performed with the software, because forecasted changes were sufficiently close to of the surgical outcomes [12]. Lira et al followed the same approach of the previous article on two groups of patients; the former underwent Le Fort I without segmental surgery, while on the latter, in addition to LFI surgery, mandibular setback was performed with an SSRO.…”

Section: Journalmentioning

confidence: 99%

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3D Soft-Tissue Prediction Methodologies for Orthognathic Surgery—A Literature Review

et al. 2019

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Three-dimensional technologies have had a wide diffusion in several fields of application throughout the last decades; medicine is no exception and the interest in their introduction in clinical applications has grown with the refinement of such technologies. We focus on the application of 3D methodologies in maxillofacial surgery, where they can give concrete support in surgical planning and in the prediction of involuntary facial soft-tissue changes after planned bony repositioning. The purpose of this literature review is to offer a panorama of the existing prediction methods and software with a comparison of their reliability and to propose a series of still pending issues. Various software are available for surgical planning and for the prediction of tissue displacements, but their reliability is still an unknown variable in respect of the accuracy needed by surgeons. Maxilim, Dolphin and other common planning software provide a realistic result, but with some inaccuracies in specific areas of the face; it also is not totally clear how the prediction is obtained by the software and what is the theoretical model they are based on.

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Section: Discussionsupporting

confidence: 65%

Section: Journalmentioning

confidence: 99%

3D Soft-Tissue Prediction Methodologies for Orthognathic Surgery—A Literature Review

et al. 2019

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“…Others have suggested that there were significant individual variations for the changes in the soft tissue following the extraction treatment because of many influencing factors, such as soft tissue thickness, soft tissue areas, the underlying skeletal patterns [7], the soft tissue remodeling during orthodontic treatment and the strain of soft tissue upon the anterior teeth. Though it is now possible to simulate soft tissue changes for patients with dental protrusion and extraction treatment by using some visual treatment objective (VTO) software, it is still difficult to accurately predict the soft tissue changes in the chin area following the orthodontic incisor retraction [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study

Zhang

et al. 2020

BMC Oral Health

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Background: To investigate the area and morphological changes around the soft tissue chin after orthodontic incisor retraction. Methods: Fifty-nine female adults with bimaxillary protrusion requiring extraction of four premolars were included in the study. Cephalograms were taken before (T0) and after (T1) orthodontic treatment. The soft tissue changes, including the area, thickness and morphology were measured. Paired-t tests were performed for statistical comparisons. Pearson correlation analyses and backward multivariate regression analyses were used to identify the relationship between the soft tissue changes and incisor retraction. Results: Following the incisor retractions (5.35 ± 1.79 mm and 4.42 ± 1.62 mm for the upper and lower, respectively), there was a significant increase in the soft tissue thickness of L1c-LL (0.64 ± 1.67 mm, P = 0.025) and Pog-Pog' (0.44 ± 1.10 mm, P = 0.022), and a significant decrease in the soft tissue thickness of B-B′ (1.21 ± 1.34 mm, P < 0.01). Changes in the area of soft tissue chin and lower lip were not statistically significant (P > 0.05). Pearson coefficient between the thickness changes of B-B′ and the retraction of lower incisors was − 0.376. The multiple correlations between the soft tissue thickness changes and incisor retractions were Y = 1.02-0.42a + 0.42b for L1c-LL, and Y = 0.17-0.31b for B-B′. Conclusions:The orthodontic incisor retraction could cause soft tissue thickness changes (i.e. an increase in L1c-LL and Pog-Pog' and a decrease in B-B′) without area changes.

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“…Over the last few years, there has been an enormous demand for orthodontic-surgical treatment seeking to correct the most varied types of skeletal malocclusions (6). The increasing demand for this treatment modality is related to both the quest for dental and facial harmony (7).…”

Section: Introductionmentioning

confidence: 99%

Impact of Orthognathic Correction of Class II Malocclusion on the Perception of Social Characteristics

et al. 2017

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Objective: To evaluate the influence on the perception of social characteristics after orthognathic treatment for the correction of Class II malocclusion. Methods:A cross-sectional study was conducted with the participation of 240 observers who evaluated images of individuals before and after orthognathic surgery for the correction of malocclusion. Based on the images, two different questionnaires were applied containing 44 questions each for evaluating social competence, intellectual ability, psychological adjustment, and attractiveness. The mean scores for evaluations of the images were compared using the Mann-Whitney U test at 5% level of significance (α=0.05).Results: Orthognathic treatment significantly (p<0.05) improved the evaluation of individuals in the requisites of the score attributed to the image (p=0.008), extroversion (p=0.026), happiness (p=0.006), self-confidence (p=0.046), and attractiveness (p=0.015). Conclusion:Orthognathic treatment for the correction of Class II malocclusions has a positive effect on the perception of social characteristics of individuals. The individuals subjected to orthognathic surgery were evaluated as being more attractive, intelligent, socially competent, and psychologically adjusted.

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Surgical prediction of skeletal and soft tissue changes in treatment of Class II

Cited by 11 publications

References 19 publications

3D Soft-Tissue Prediction Methodologies for Orthognathic Surgery—A Literature Review

3D Soft-Tissue Prediction Methodologies for Orthognathic Surgery—A Literature Review

Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study

Impact of Orthognathic Correction of Class II Malocclusion on the Perception of Social Characteristics

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