Traditional face-bow transfer versus three-dimensional virtual reconstruction in orthognathic surgery

Quast, Anja; Santander, Petra; Witt, Daria; Damm, A.; Moser, Norman; Schliephake, Henning; Meyer-Marcotty, Philipp

doi:10.1016/j.ijom.2018.09.001

Cited by 29 publications

(17 citation statements)

References 33 publications

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“…Previous comparative studies have shown that 3D simulation provides superior results for OGS treatment compared to 2D planning, with disparities between the studies for sample compositions, outcome measure tools, and endpoints of research 15,16,[28][29][30][31][32][37][38][39] . This study was designed to investigate possible differences of facial contour asymmetry after OGS treatment in a cohort of patients with clefts, depending on either 2D-or 3D-guided planning modality.…”

Section: Discussionmentioning

confidence: 99%

Outcome of facial contour asymmetry after conventional two-dimensional versus computer-assisted three-dimensional planning in cleft orthognathic surgery

Hsu

Denadai

Pai

et al. 2020

Sci Rep

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Computer-assisted 3D planning has overcome the limitations of conventional 2D planning-guided orthognathic surgery (OGS), but difference for facial contour asymmetry outcome has not been verified to date. This comparative study assessed the facial contour asymmetry outcome of consecutive patients with unilateral cleft lip and palate who underwent 2D planning (n = 37)-or 3D simulation (n = 38)-guided OGS treatment for correction of maxillary hypoplasia and skeletal Class III malocclusion between 2010 and 2018. Normal age-, gender-, and ethnicity-matched individuals (n = 60) were enrolled for comparative analyses. 2D (n = 60, with 30 images for each group) and 3D (n = 43, with 18 and 25 images for 2D planning and 3D simulation groups, respectively) photogrammetric-based facial contour asymmetry-related measurements were collected from patients and normal individuals. The facial asymmetry was further verified by using subjective perception of a panel composed of 6 blinded raters. On average, the facial contour asymmetry was significantly (all p < 0.05) reduced after 3D virtual surgery planning for all tested parameters, with no significant differences between post-OGS 3D simulation-related values and normal individuals. No significant differences were observed for pre-and post-OGS values in conventional 2D planning-based treatment, with significant (all p < 0.05) differences for all normal individuals-related comparisons. This study suggests that 3D planning presents superior facial contour asymmetry outcome than 2D planning.Orthognathic surgery (OGS) plays a key role for successful management of a myriad of facial deformities associated with malocclusion, with facial asymmetry feature being most frequently associated with skeletal class III malocclusion 1-3 . Particularly, patients with unilateral cleft lip and palate differ from the noncleft population, because they have a congenital orofacial defect compromising both the bone and soft tissues on the lesion side 4-6 , which may be expressed as facial asymmetry 7-15 . Skeletal mature patients with clefts frequently presents with maxillomandibular disharmony (maxillary hypoplasia and skeletal class III malocclusion) which requires OGS treatment 7-15 . As residual facial asymmetry after OGS treatment may negatively impact patients' perceptions about outcome requiring further revisionary surgical interventions [16][17][18][19] , the significance of preoperative prediction of this deformity should not be underestimated 15,16,20 . Therefore, it is of paramount that an accurate diagnosis of asymmetry is accomplished preoperatively for that a precise surgical planning and execution is performed 7,15,16,20 .In this setting, OGS planning has evolved over the past decades 15-24 . Traditionally, OGS planning has been constructed on two-dimensional (2D) cephalometry, 2D photographic analysis, articulators, and dental models 21,22 . However, this planning modality presents limitations for challenging clinical scenarios such as patients with clefts associated with malocclusion a...

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Section: Discussionmentioning

confidence: 99%

Outcome of facial contour asymmetry after conventional two-dimensional versus computer-assisted three-dimensional planning in cleft orthognathic surgery

Hsu

Denadai

Pai

et al. 2020

Sci Rep

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“…To ensure accuracy in this procedure, this step was manually corrected if necessary. The resulting 3D model was then aligned to the Frankfurt Horizontal Plane (FH) and cephalometrically analyzed equally to the 2D lateral cephalogram [14]. The sagittal and vertical measurements were projected onto the midsagittal plane to receive 2D angles and distances.…”

Section: Methodsmentioning

confidence: 99%

Orthodontic incisor decompensation in orthognathic therapy—success and efficiency in three dimensions

Quast¹,

Santander²,

Leding³

et al. 2020

Clin Oral Invest

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Objectives Sufficient dental decompensation is crucial for treatment success in combined orthodontic-surgical treatment. The study’s objective was to determine the treatment success and efficiency in sagittal, vertical, and transversal decompensation. Methods This longitudinal, observational study enrolled 52 adult patients, who underwent orthodontic-surgical treatment. Incisor inclinations and positions as well as skeletal changes were assessed pre-treatment (T1), pre-surgical (T2), and post-surgical (T3) by lateral cephalograms and CBCT scans. Results Incisor decompensation was insufficient in all three dimensions. Sagittal: treatment efficiency did not differ between class II and III patients. Vertical: patients with open bite demonstrated pre-surgical bite deepening and insufficient surgical reduction of the maxillomandibular plane angle. Transversal: Dental midline deviations were not adapted to the skeletal asymmetry so that menton deviations were not properly corrected. Conclusions Incisor decompensation was not as successful as requested in all three dimensions and the treatment ideal was seldom achieved. Clinical relevance To improve the skeletal outcome, the orthodontist has to treat the patient with the desired surgical movements in mind and should critically evaluate the pre-surgical incisor decompensation before referral to the surgical team.

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“…There are no doubts that the conventional planning methods provide sound clinical and esthetic results in orthognathic surgery and still widely used in many clinics. However, inherent errors originated from the impression of dentition, the fabrication of dental casts and face bow transfer should exist [16,17], and two-dimensional cephalometric tracing causes measurement errors [18]. Furthermore, the linear measurements on lateral and posteroanterior cephalograms inevitably have differences on the actual distance, and the prediction of three-dimensional (3D) movement of the maxilla and mandible after orthognathic surgery cannot be accurate as it is planned on the twodimensional (2D) plane [19][20][21].…”

Section: Application Of 3d Planningmentioning

confidence: 99%

Current status of surgery-first approach (part III): the use of 3D technology and the implication in obstructive sleep apnea

Jung

Moon

Kwon

2020

Maxillofac Plast Reconstr Surg

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Considering psychosocial needs of patients, it is not surprising that surgery-first approach (SFA) is becoming more popular than ever. Although the concept of SFA was introduced a few decades ago, the limitation of analysis method based on two-dimensional images makes surgeons reluctant to choose SFA. Recently, the advancement of three-dimensional technology allows us to perform SFA even without minimal pre-surgical orthodontic treatment, and the prediction of surgical outcome became more accurate, especially in obstructive sleep apnea (OSA) patients to whom the advantages of SFA should be more significant. Here, we describe the current trend of SFA and its implication in OSA patients.

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Traditional face-bow transfer versus three-dimensional virtual reconstruction in orthognathic surgery

Cited by 29 publications

References 33 publications

Outcome of facial contour asymmetry after conventional two-dimensional versus computer-assisted three-dimensional planning in cleft orthognathic surgery

Outcome of facial contour asymmetry after conventional two-dimensional versus computer-assisted three-dimensional planning in cleft orthognathic surgery

Orthodontic incisor decompensation in orthognathic therapy—success and efficiency in three dimensions

Current status of surgery-first approach (part III): the use of 3D technology and the implication in obstructive sleep apnea

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