A new method for the 3D measurement of postoperative swelling following orthognathic surgery

Kau, Chung How; Cronin, A.J.; Durning, Peter; Zhurov, Alexei I.; Sandham, Andrew; Richmond, Stephen

doi:10.1111/j.1601-6343.2006.00341.x

Cited by 104 publications

(61 citation statements)

References 36 publications

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“…1 Therefore, the present study analyzes the short-term soft tissue changes, and the rationale for recording changes 2 months after surgery was based on the assumption that most of the postoperative swelling had been resolved by then. 4 Kau et al 21 observed that 1 month after bimaxillary surgery the soft tissues had obtained 82% of the contour they had 6 months after surgery, and during the following 2 months they changed only by 6%. Potential relapse of the surgical correction might still not be fully expressed, but it was assumed to be moderate.…”

Section: Discussionmentioning

confidence: 99%

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Importance of the vertical incisor relationship in the prediction of the soft tissue profile after Class III bimaxillary surgery

Jakobsone

Stenvik

Espeland

2012

The Angle Orthodontist

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Objective: To quantify the relative soft tissue profile response to the skeletal changes resulting from bimaxillary surgery to correct Class III malocclusion in patients with different vertical incisor relationships presurgery. Materials and Methods: The sample comprised lateral cephalograms of 80 consecutive patients before and 2 months after surgery. All patients had one-piece Le Fort I and bilateral sagittal split osteotomies. Patients were divided in three subgroups according to their preoperative characteristics, as follows: (1) open-bite patients, (2) patients with positive overbite and the upper lip resting on upper incisors, and (3) patients with positive overbite and the upper lip resting on lower incisors (lipblock). Trimmed means of soft to hard tissue ratios were calculated for the subgroups. Regression analyses were performed to examine factors influencing the soft tissue changes. Results: There were strong correlations between the horizontal movement of upper incisors and upper lip in patients with open bite (r 5 0.77) and in patients with positive overbite and upper lip resting on upper incisors (r 5 0.85). The upper lip followed the maxilla with a ratio of 0.5:1. In patients with lip-block, the association between maxillary repositioning and upper lip changes was weak. In all groups a strong association between horizontal soft and hard tissue changes was observed for the lower lip and chin, but the pattern differed depending on the vertical movement of the mandible. Conclusions: In the prediction of soft tissue response it is important to take into account the vertical incisor relationship, particularly in patients with lip-block. (Angle Orthod. 2012;82:441-447.)

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Section: Discussionmentioning

confidence: 99%

“…Potential relapse of the surgical correction might still not be fully expressed, but it was assumed to be moderate. 21 The long-term response will be addressed in a future study. The variability in soft tissue changes (Figure 3) likely reflects the difference in the initial skeletal morphology and, accordingly, the skeletal changes as well.…”

Section: Discussionmentioning

confidence: 99%

Importance of the vertical incisor relationship in the prediction of the soft tissue profile after Class III bimaxillary surgery

Jakobsone

Stenvik

Espeland

2012

The Angle Orthodontist

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“…surgical treatment, evaluation of postoperative swelling, 3D prefabricated archwires, research, and distinction between different syndromes involving craniofacial deformities. 4,5 3D imaging using a laser scanning system proved reliable over 3 minutes and 3 days, with accuracy within 0.85 mm. 6 A recent in vitro study using a photogrammetric tool for 3D acquisition showed a system error within 0.2 mm.…”

Section: Introductionmentioning

confidence: 99%

Facial Morphology of Slovenian and Welsh White Populations Using 3-Dimensional Imaging

Bozic

Kau

Richmond

et al. 2009

The Angle Orthodontist

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Objective: To use 3-dimensional (3D) facial averages to test the hypothesis that the facial morphologies of 2 European white groups (Slovenia and Wales) have no differences. Methods: Fifty males and 50 females from Wales and 43 males and 44 females from Slovenia were included in the study. Subjects ranged from 18 to 30 years of age. Four subgroups were formed: Slovenian males (SM), Slovenian females (SF), Welsh males (WM), and Welsh females (WF). 3D data were acquired using a laser scanning system. An average face for each subgroup was obtained using a previously validated mathematical algorithm. Facial differences were quantified after average faces had been superimposed using a previously validated method. Results: A total of 187 subjects from Slovenia and Wales formed 4 gender-specific subgroups. Absolute differences between subgroups ranged from 0.36 mm to 1.51 mm. The mean linear facial difference between SF and WF was 0.64 Ϯ 0.51 mm, and between SM and WM was 0.36 Ϯ 0.41 mm. Similarities between subgroups ranged from 13.43% (SF, WF) to 70.23% (SM, WM). Slovenian males and females tend to express Class III facial morphology when compared with the Welsh gender-specific subgroups. Male faces, in general, have more pronounced nasal, brow, and frontal regions and mandibles when compared with females. Female faces have more prominent malar and periocular areas. Conclusion:The hypothesis is rejected. Morphologic differences exist between Slovenian and Welsh faces. (Angle Orthod. 2009;79:640-645.)

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“…30,31 Since 3D scanning enables not only linear measures of outcome of orthog nathic surgery to be determined, but also volumetric changes, it means that the effect of factors such as post operative period and differing pharmacological interventions on facial swelling follow ing surgery can also be assessed. 32,33 Where patients require facial recon struction after tissue loss, as a result of trauma or malignancy, 3D scanning techniques can be used to map the area of deformity, mirror the area from the unaffected opposite side of the face and via rapid prototyping, recreate a facial prosthesis. 34 …”

Section: Orthognathic and Craniofacial Surgerymentioning

confidence: 99%

3D surface imaging in dentistry – what we are looking at

et al. 2008

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A new method for the 3D measurement of postoperative swelling following orthognathic surgery

Abstract: The 3D laser-scanning device and the method described was a reliable and accurate measure of facial swelling following surgery.

Cited by 104 publications

References 36 publications

Importance of the vertical incisor relationship in the prediction of the soft tissue profile after Class III bimaxillary surgery

Importance of the vertical incisor relationship in the prediction of the soft tissue profile after Class III bimaxillary surgery

Facial Morphology of Slovenian and Welsh White Populations Using 3-Dimensional Imaging

3D surface imaging in dentistry – what we are looking at

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