scholarly journals The effect of hard tissue surgical changes on soft tissue displacement: a pilot CBCT study

2017 ◽  
Vol 22 (5) ◽  
pp. 39-46 ◽  
Author(s):  
Leonardo Koerich ◽  
Daniel Paludo Brunetto ◽  
Eduardo Terumi Blatt Ohira
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Hard Tissue ◽  
Upper Lip ◽  
Dimensional Changes ◽  
Case Selection ◽  
Tissue Changes ◽  
Surgery Outcomes ◽  
Lower Incisors

ABSTRACT Introduction: This pilot study had as main objective to test the reliability of a new method to evaluate orthognathic surgery outcomes and also, to understand the effect of hard tissue changes on soft tissue displacement. Methods: The sample consisted of eight patients that underwent bimaxillary advancement and had CBCT at two time points (before surgery and 6-8 months follow-up). Voxel-based cranial base superimposition was used to register the scans. A different technique of iterative closest point (ICP) was used to measure and correlate the changes. The average displacement of 15 areas (4 hard tissue and 11 soft tissue) were measured twice. Results: ICC was > 0.99 for all areas. Changes in the tip of the nose did not correlate with changes in any maxillary area, whereas soft tissue A point, A point and upper lips had correlation with several areas. The highest correlation for the maxilla was between the upper lip and the left/right supra cheilion (p< 0.001, r= 0.91 and p< 0.001, r= 0.93, respectively). In the mandible, the majority of the correlations involved soft tissue pogonion, pogonion and lower incisors, with the strongest one between pogonion and lower incisors (p< 0.001, r= 0.98). Conclusion: With the proper case selection, ICP is a reliable method that can be used to assess three-dimensional changes.

Three-dimensional soft-tissue and hard-tissue changes in the treatment of bimaxillary protrusion

2013 ◽  
Vol 144 (2) ◽  
pp. 218-228 ◽  
Author(s):  
R. Christian Solem ◽  
Richard Marasco ◽  
Luis Guiterrez-Pulido ◽  
Ib Nielsen ◽  
Seong-Hun Kim ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Hard Tissue ◽  
Tissue Changes ◽  
Bimaxillary Protrusion

scholarly journals Soft tissue response after Class III bimaxillary surgery

2012 ◽  
Vol 83 (3) ◽  
pp. 533-539 ◽  
Author(s):  
Gundega Jakobsone ◽  
Arild Stenvik ◽  
Lisen Espeland
Keyword(s):  
Soft Tissue ◽  
Tissue Response ◽  
Hard Tissue ◽  
Upper Lip ◽  
Short Term ◽  
Face Height ◽  
Soft Tissue Response ◽  
The Impact

ABSTRACT Objective: To analyze the impact of surgical change in anterior face height and skeletal relapse on the long-term soft tissue profile. Materials and Methods: Cephalometric radiographs of 81 patients taken before surgery and at five time points during a 3-year follow-up period were analyzed. All patients had Le Fort I and bilateral sagittal split osteotomies. The patients were divided into three subgroups according to the change in anterior face height during surgery. Calculations of soft to hard tissue ratios were based on the long-term soft tissue response relative to the surgical repositioning. Results: The horizontal surgical repositioning varied considerably, depending on whether anterior face height was increased or decreased. For upper lip prominence, the pattern of long-term change was the same irrespective of change in face height. In all groups, upper lip thickness decreased in both the short term and the long term, particularly in patients with surgical increase in face height. Lower lip thickness increased in the short term but decreased during the follow-up period. There were significant associations between horizontal soft tissue and corresponding hard tissue changes, except for soft tissue A-point and upper lip, when face height was increased. The ratios were higher for mandibular variables than for maxillary variables, particularly for B-point and pogonion when anterior face height had decreased. Conclusion: A change in facial height influences the soft tissue response. The mandibular soft tissues closely follow skeletal relapse beyond 2 months postsurgery. The findings have clinical implications for the relative maxillary and mandibular repositioning when planning surgery.

scholarly journals Three‐dimensional soft tissue changes in orthodontic extraction and non‐extraction patients: a prospective study

2021 ◽  
Author(s):  
Roberto Rongo ◽  
Line Nissen ◽  
Cécile Leroy ◽  
Ambrosina Michelotti ◽  
Paolo M. Cattaneo ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Prospective Study ◽  
Three Dimensional ◽  
Tissue Changes ◽  
Soft Tissue Changes ◽  
A Prospective Study

scholarly journals Dentoskeletal and soft tissue changes associated with miniscrew anchorage in customized lingual orthodontics

2018 ◽  
Vol 47 (1) ◽  
pp. 84-95
Author(s):  
Dawei Liu ◽  
Jing Li ◽  
Feifei Lei ◽  
Xuedong Wang ◽  
Yanheng Zhou
Keyword(s):  
Soft Tissue ◽  
Clinical Effectiveness ◽  
Upper Lip ◽  
Lingual Orthodontics ◽  
Premolar Extraction ◽  
Anterior Teeth ◽  
Mandibular Plane ◽  
Space Closure ◽  
Tissue Changes ◽  
Soft Tissue Changes

Objectives The goal of this study was to analyze skeletal, dental, and soft tissue changes of patients treated with customized lingual systems and to evaluate the clinical effectiveness of miniscrew anchorage. Methods Nine upper first premolar extraction patients who were treated with customized lingual appliances were included in this study. Miniscrews were used for reinforcement of molar anchorage. Cephalometric films and study models were obtained before treatment (T1), after alignment (T2), and after treatment (T3). Treatment effects were analyzed by cephalometric radiographs and study models. Results The upper anterior teeth were retracted significantly at T2 and T3 (4.41 ± 4.14 mm and 5.51 ± 2.48 mm, respectively). During space closure, the upper first molars showed slight mesial movement (1.50 ± 1.97 mm). The intercanine width of the upper arch increased at T2 (1.59 ± 1.81 mm), but decreased at T3 (0.11 ± 1.00 mm). The sella-nasion-A, A-nasion-B, and mandibular plane angles were not significantly changed at T3. The upper lip showed continuous retraction at both T2 and T3 (1.40 ± 1.46 mm and 2.32 ± 2.48 mm, respectively). Conclusions By using miniscrew anchorage for lingual orthodontics, patients’ dental and soft tissue changes considerably improved and molar anchorage was reinforced.

scholarly journals Study of soft tissue changes in the upper lip and nose after backward movement of the maxilla in orthognathic surgery

2020 ◽  
Vol 46 (6) ◽  
pp. 385-392
Author(s):  
Suyun Seon ◽  
Hyun-Woo Lee ◽  
Bong-Jin Jeong ◽  
Baek-Soo Lee ◽  
Yong-Dae Kwon ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Orthognathic Surgery ◽  
Upper Lip ◽  
Tissue Changes ◽  
Soft Tissue Changes
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