A systematic review on soft-to-hard tissue ratios in orthognathic surgery part II: Chin procedures

Moragas, Joan San Miguel; Oth, Olivier; Büttner, Michael; Mommaerts, Maurice Y.

doi:10.1016/j.jcms.2015.07.032

Cited by 52 publications

(31 citation statements)

References 48 publications

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“…13,25 The B, Pog, and Me in our study responded at a ratio of nearly 0.9 to the corresponding hard tissues. The historical reports of mandibular setback surgery showed a 1:1 horizontal ratio at Pog and point B 20,21,28 ; however, the ratio for the same points reported in other studies was 0.9:1. 13,25 …”

Section: Discussionmentioning

confidence: 51%

Soft Tissue Changes Measured With Three-Dimensional Software Provides New Insights for Surgical Predictions

Chang

Ruellas

Yatabe

et al. 2017

Journal of Oral and Maxillofacial Surgery

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Purpose Although computer-aided craniofacial reconstructions allow for simulation of hard tissue changes, the prediction of the final soft tissue facial changes remains a challenge. The purpose of the present study was to evaluate the 3-dimensional (3D) soft tissue changes in patients undergoing 2-jaw orthognathic surgery. Patients and Methods For the present retrospective cohort study, 40 consecutive patients (11 men and 29 women; mean age 23.5 ± 4.9 years) who had undergone 2-jaw orthognathic surgery were selected. We obtained the medical and dental records from 3 weeks before surgery and 6 months after surgery. We used image processing software to segment, superimpose, and quantify the hard and soft tissue displacements in 3 dimensions before and after surgery at 15 paired locations. The soft tissue and hard tissue changes were determined through quantification of homologous landmark displacements between the preoperative and postoperative computed tomography data. We measured the 3D soft and hard tissue changes and the anteroposterior, inferosuperior, and transverse components of the changes. We quantified the ratios between the soft and hard tissue changes, tested Pearson’s correlation between these changes, and developed a predictive regression equation for the observations at each location. Results We found that soft tissue movement followed the hard tissue movement, with a correlation nearly equal to 0.9 (range 0.85 to 0.98), suggesting that in general the soft tissues of the maxillary and mandibular landmarks are affected similarly by the skeletal movements. The anteroposterior component of the soft tissue 3D displacements followed the hard tissue movement with a ratio greater than 0.9 and with high correlation (r > 0.9) in the mandible. Conclusion The results of the present study provide surgeons with a ratio of hard to soft tissue change and the strength of the correlations, which will allow for more accurate 3D predictions for both midline and lateral structures in bimaxillary orthognathic surgical cases. In addition, predictive equations for various landmarks were developed and can be used in computer-based prediction programs to aid in treatment planning of soft tissue changes.

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Section: Discussionmentioning

confidence: 51%

Soft Tissue Changes Measured With Three-Dimensional Software Provides New Insights for Surgical Predictions

Chang

Ruellas

Yatabe

et al. 2017

Journal of Oral and Maxillofacial Surgery

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“…El diagnóstico de sujetos con patología creaneofacial tradicionalmente se ha realizado con tecnología 2D utilizando cefalogramas bidimensionales (2D); bajo esa metodología se han desarrollado la mayoría de las investigaciones (San Miguel de Moragas et al, 2014;San Miguel de Moragas et al, 2015;Olate et al, 2016); sin embargo, las mismas investigaciones han demostrado variabilidad en resultados toda vez que la condición tridimensional (3D) del rostro limitan el consenso y precisión en los análisis 2D. Swennen et al (2006) indicaron que los estudios 2D son factibles de presentar sesgo en términos de relación entre tejidos duros y blandos; sin embargo, los estudios 3D no han mostrado claridad en los resultados presentados y se han observado múltiples sesgos en las investigaciones publicadas que aumentan las limitaciones observadas en los estudios (Olate et al, 2017).…”

Section: Discussionunclassified

Comparación entre las Técnicas de Ricketts y McNamara para la Determinación de la Posición del Maxilar y la Mandíbula en Jóvenes del Ecuador

2018

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1,4,5 GUERRERO, M.; OCAMPO, J. & OLATE, S.Comparación entre las técnicas de Ricketts y McNamara para la determinación de la posición del maxilar y la mandíbula en jóvenes del Ecuador. Int. J. Morphol., 36(1):169-174, 2018. RESUMEN:Los análisis cefalométricos, a partir de una radiografía lateral de cráneo, son amplios y variados considerando tanto los patrones funcionales como los de estética facial. Entre las técnicas de medición en cefalometría, Ricketts y de McNamara son ampliamente utilizados; ambas le entregan importancia a determinar la posición del maxilar y de la mandíbula con diferentes relaciones esqueletales. El objetivo de esta investigación es comparar ambas técnicas en una población joven de Ecuador; se realizó un análisis de concordancia utilizando el índice kappa de Cohen entre los resultados de las mediciones correspondientes a 44 radiografías cefálicas laterales de sujetos jóvenes entre 18 y 27 años de edad, de ambos sexos. En relación a la posición maxilar, el 56,82 % (IC 95 %: 42,18 % -71,45 %) coinciden en el diagnóstico de protrusión maxilar; el índice de concordancia kappa de Cohen fue de 0,599 (IC 95 %: 0,354 -0,854) con un valor p<0,05. En relación a la posición mandibular, el 50,0 % (IC 95 %: 35,23 % -64,77 %) coinciden en el diagnóstico de retrusión mandibular; el índice kappa de Cohen fue de 0,460 (IC 95 % 0,229 -0,691) con un valor p<0,05. Se concluye que, a pesar de manejar puntos de referencia cefalométricos diferentes, las dos técnicas de medición cráneo-facial son útiles para el estudio de posición de maxila y mandíbula. Existen diferencias entre algunos analisis de ambos estudios que pueden incidir en la selección terapéutica de potenciales pacientes.

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“…Trauner and Obwegeser (3) were the first surgeons to perform a chin advancement osteotomy via an intraoral approach and called it « ge-e86 nioplasty ». This technique was then modified by several others and used to move the chin in all three dimensions of space: setback genioplasty, impaction genioplasty, vertical height augmentation genioplasty, narrowing genioplasty and widening genioplasty (4). To obtain the best results in genioplasty, it is essential to make an optimal surgical plan.…”

Section: Introductionmentioning

confidence: 99%

Genioplasty with surgical guide using 3D-printing technology: A systematic review

Oth¹,

Durieux²,

Orellana³

et al. 2020

J Clin Exp Dent

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Background: The purpose of this systematic review is to evaluate the current state of the art of making genioplasties using 3D printing technology. Material and Methods: A multi-database single-reviewer systematic review identified sixteen papers that fulfilled the selection criteria. There were mainly case series and case reports available (Level IV of the Oxford Evidence-based medicine scale); only two prospective study (Level III) evaluated this subject. These articles are analyzed in details and summarized in this review. Results: The realization of genioplasties with surgical guide using 3D-printing technology could improve predictability and accuracy. It protects anatomical structures in the environment of the surgery, reducing by this way the morbidity and providing safer results. The type of printer and material used as well as the sterilization techniques should be further developed by the authors. The use of open-access software should also be further explored to allow the use of these new technologies by the largest number of surgeons. Conclusions: Finally, prospective multi-center studies with larger samples should be performed to definitively conclude the benefits of this new technology and allow for its routine use. This article is the first systematic review on this topic.

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A systematic review on soft-to-hard tissue ratios in orthognathic surgery part II: Chin procedures

Cited by 52 publications

References 48 publications

Soft Tissue Changes Measured With Three-Dimensional Software Provides New Insights for Surgical Predictions

Soft Tissue Changes Measured With Three-Dimensional Software Provides New Insights for Surgical Predictions

Comparación entre las Técnicas de Ricketts y McNamara para la Determinación de la Posición del Maxilar y la Mandíbula en Jóvenes del Ecuador

Genioplasty with surgical guide using 3D-printing technology: A systematic review

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