Predictability of upper lip soft tissue changes with maxillary advancement

Stella, John Paul; Streater, Mark R.; Epker, Bruce N.; Sinn, Douglas P.

doi:10.1016/s0278-2391(89)80008-4

Cited by 104 publications

(67 citation statements)

References 4 publications

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“…Stella et al 8 have suggested that in some cases an air pocket could be present between the maxillary dentoalveolar structures and the upper lip mucosa, and they proposed that maxillary advancement into this ''dead space'' would not result in a change in the soft tissue contours. This is in accordance with the observations in our subsample with lip-block, in which advancement of the maxilla did not affect the upper lip to any extent.…”

Section: Discussionmentioning

confidence: 99%

“…Investigations [6][7][8][9][10] of the soft tissue response after isolated maxillary advancement have reported a wide range of ratios (0.3:1 to 0.9:1) for upper lip change to maxillary movement with weak correlations. Factors that have been suggested to contribute to the unpredictable response of the upper lip are a ''dead space'' (lip-block) between a retrognathic maxilla and the upper lip 8 and adjunctive soft tissue procedures such as V-Y closure of the upper lip suture 11 and alar base cinch suture. 12 Bimaxillary surgery for Class III correction is often implemented to correct vertical discrepancies, to avoid large skeletal movements, or to meet esthetic or functional needs.…”

Section: Introductionmentioning

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%

Section: Introductionmentioning

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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“…The factors that have been suggested to influence postoperative stability of the soft tissues include the preoperative soft tissue thickness, [1][2][3] gender, 1,4 and the amount of surgical movement. 1,5 The relationship between hard tissue and soft tissue changes may be complex because soft tissue morphology, thickness, posture, and tonicity vary from person to person.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of long-term soft tissue changes after bimaxillary orthognathic surgery in Class III patients

Aydemir

Efendiyeva²,

Karasu

et al. 2014

The Angle Orthodontist

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Objective: To assess soft tissues in the short and long term after bimaxillary surgery in Class III patients by comparing the hard tissue changes and results between time periods. Materials and Methods: Twenty-six Class III adult patients treated with bimaxillary surgery were included in the study. Cephalometric records were taken before surgery (T1) and 5 months (T2), 1.4 years (T3), 3 years (T4), and 5 years (T5) after surgery.

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“…The stated reasons for the inconsistency between prediction tracings and the actual post operative profile for the labial regions are due to different lip tone, length, posture and mass of the lips along with individual variations in response to surgery (Quast et al,1983;Stella et al, 1989;Kazandjian et al,1999). Kaipatur and Flores-Mir (2009) and Magro-Filho et al (2010) have demonstrated very little overall differences in the predictive accuracy of the main orthognathic prediction software programs available on the market.…”

Section: Computerised Predictionmentioning

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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Predictability of upper lip soft tissue changes with maxillary advancement

Cited by 104 publications

References 4 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

Evaluation of long-term soft tissue changes after bimaxillary orthognathic surgery in Class III patients

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

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