scholarly journals Surgical treatment of a skeletal Class III patient using customized brackets based on the CAD/CAM virtual orthodontic system

2021 ◽  
Author(s):  
Eun-Hack Andrew Choi ◽  
Jin-Ho Park ◽  
Tselmuun Erdenebat ◽  
Chung-Ju Hwang ◽  
Jung-Yul Cha
Keyword(s):  
Computer Aided Design ◽  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Treatment Time ◽  
Three Dimensional ◽  
Class Iii ◽  
Efficient Treatment ◽  
Skeletal Class ◽  
Computer Aided ◽  
Cad Cam

ABSTRACT The computer-aided design/computer-aided manufacturing (CAD/CAM) virtual orthodontic system produces customized brackets, indirect bonding jigs, and archwires based on a three-dimensional virtual setup. In surgical cases, this system helps to visualize the final occlusion during diagnosis and to efficiently plan individualized presurgical orthodontic treatments. A 20-year-old female patient with a skeletal Class III malocclusion, maxillary protrusion, and lip protrusion was successfully treated with orthognathic surgery and orthodontic treatment with maxillary first premolar extractions. The CAD/CAM system was applied for efficient treatment, with a total active treatment time of 16 months. In this case report, the applicability of the CAD/CAM virtual orthodontic system for orthognathic surgery cases is demonstrated. Suggestions are also made to overcome the limitations and to maximize the advantages of this system during orthodontic treatment of patients undergoing orthognathic surgery.

scholarly journals Camouflage treatment for skeletal Class III patient with facial asymmetry using customized bracket based on CAD/CAM virtual orthodontic system:

2019 ◽  
Vol 90 (4) ◽  
pp. 607-618
Author(s):  
Ha Na Sha ◽  
Sun Young Lim ◽  
Sun Mi Kwon ◽  
Jung-Yul Cha
Keyword(s):  
Computer Aided Design ◽  
Orthodontic Treatment ◽  
Facial Asymmetry ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Mandibular Asymmetry ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

ABSTRACT When considering camouflage orthodontic treatment for Class III malocclusion with skeletal facial asymmetry, it is crucial to preserve the favorable compensated posterior occlusion. Once the inclination of the compensated occlusion is changed during orthodontic treatment, unstable occlusion, such as crossbite or scissor bite may occur. A 23-year-old female patient had anterior spacing with Class III malocclusion and a mandibular asymmetry. A nonsurgical approach was adopted. The treatment objectives were to establish a Class I molar relationship with compensated inclination of the posterior dentition and to correct the midline deviation. To achieve these goals, the computer-aided design/computer-aided manufacturing (CAD/CAM) orthodontic system plus customized brackets was applied, and miniscrews were used to distalize the left mandibular dentition for midline correction. The results suggested that the CAD/CAM-based customized brackets can be efficiently used in camouflage treatment to achieve a correct final occlusion.

scholarly journals Computer-Aided Planning in Orthognathic Surgery: A Comparative Study with the Establishment of Burstone Analysis-Derived 3D Norms

2019 ◽  
Vol 8 (12) ◽  
pp. 2106 ◽  
Author(s):  
Cheng-Ting Ho ◽  
Rafael Denadai ◽  
Hsin-Chih Lai ◽  
Lun-Jou Lo ◽  
Hsiu-Hsia Lin
Keyword(s):  
Orthognathic Surgery ◽  
Three Dimensional ◽  
Computer Assisted ◽  
Class Iii ◽  
Facial Soft Tissue ◽  
Skeletal Class ◽  
Nasolabial Angle ◽  
Normal Occlusion ◽  
Computer Aided ◽  
Cephalometric Measurements

Three-dimensional (3D) computer-aided simulation has revolutionized orthognathic surgery treatment, but scarce 3D cephalometric norms have been defined to date. The purposes of this study were to (1) establish a normative database of 3D Burstone cephalometric measurements for adult male and female Chinese in Taiwan, (2) compare this 3D norm dataset with the two-dimensional (2D) Burstone norms from Caucasian and Singaporean Chinese populations, and (3) apply these 3D norms to assess the outcome of a computer-aided simulation of orthognathic surgery. Three-dimensional Burstone cephalometric analysis was performed on 3D digital craniofacial image models generated from cone-beam computed tomography datasets of 60 adult Taiwanese Chinese individuals with normal occlusion and balanced facial profile. Three-dimensional Burstone analysis was performed on 3D image datasets from patients with skeletal Class III pattern (n = 30) with prior computer-aided simulation. Three-dimensional Burstone cephalometric measurements showed that Taiwanese Chinese males had significantly (p < 0.05) larger anterior and posterior facial heights, maxillary length, and mandibular ramus height than females, with no significant (p > 0.05) difference for facial soft-tissue parameters. The 3D norm dataset revealed Taiwanese Chinese-specific facial characteristics, with Taiwanese presenting (p < 0.05) a more convex profile, protrusive maxillary apical bases, protruding mandible, protruding upper and lower lips, and a shorter maxillary length and lower facial height than Caucasians. Taiwanese had significantly (p < 0.05) larger maxillary projection, vertical height ratio, lower face throat angle, nasolabial angle, and upper lip protrusion than Singaporean Chinese. No significant (p > 0.05) difference was observed between 3D norms and computer-aided simulation-derived 3D patient images for horizontal skeletal, vertical skeletal, and dental measurements, with the exception of two dental parameters (p < 0.05). This study contributes to literature by providing gender- and ethnic-specific 3D Burstone cephalometric norms, which can assist in the multidisciplinary-based delivery of orthodontic surgical care for Taiwanese Chinese individuals worldwide, including orthodontic management, computer-assisted simulation, and outcome assessment.

scholarly journals Postsurgical Stability of Temporomandibular Joint of Skeletal Class III Patients Treated with 2-Jaw Orthognathic Surgery via Computer-Aided Three-Dimensional Simulation and Navigation in Orthognathic Surgery (CASNOS)

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Ling-Chun Wang ◽  
Yi-Hao Lee ◽  
Chi-Yu Tsai ◽  
Te-Ju Wu ◽  
Ya-Ying Teng ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Three Dimensional ◽  
Class Iii ◽  
Skeletal Class ◽  
Computer Aided ◽  
Before And After ◽  
Bimaxillary Orthognathic Surgery ◽  
The Mean ◽  
Dimensional Simulation ◽  
The Right

Objective. The aim of this study is to clarify the postsurgical stability of temporomandibular joints in skeletal class III patients treated with 2-jaw orthognathic surgery which was performed utilizing computer-aided three-dimensional simulation and navigation in orthognathic surgery (CASNOS) protocol. Materials and Methods. 23 consecutive nongrowing skeletal class III patients with mandibular prognathism associated with maxillary retrognathism treated with 2-jaw orthognathic surgery between 2018 and 2019 were enrolled in this study. The surgery was planned according to the standardized protocol of CASNOS (computer-aided three-dimensional simulation and navigation in orthognathic surgery). Computed tomography (CT) scans were performed in all patients 3 weeks presurgically and 6 months postsurgically. ITKSNAP and 3D Slicer software were used to reconstruct three-dimensional facial skeletal images, to carry out image segmentation, and to superimpose and quantify the TMJ position changes before and after surgery. Amount of displacement of the most medial and lateral points of the condyles and the change of intercondylar angles were measured to evaluate the postsurgical stability of TMJ. Results. A total amount of 23 skeletal class III patients female : male = 12 : 11 with age ranged from 20.3 to 33.5 years (mean: 24.39 ± 4.8   years   old ) underwent Le Fort I maxillary advancement and BSSO setback of the mandible. The surgical outcome revealed the satisfactory correction of their skeletal deformities. The mean displacement of the right most lateral condylar point (RL-RL ′ ) was 1.04 ± 0.42   mm and the mean displacement of the left most lateral condylar point (LL-LL ′ ) was 1.19 ± 0.41   mm . The mean displacement of the right most medial condylar point (RM-RM ′ ) was 1.03 ± 0.39   mm and the left most medial condylar point (LM-LM ′ ) was 0.96 ± 0.39   mm . The mean intercondylar angle was 161.61 ± 5.08 ° presurgically and 159.28 ± 4.92 ° postsurgically. Conclusion. The postsurgical position of TM joint condyles in our study only presented a mild change with all the landmark displacement within a range of 1.2 mm. This indicates the bimaxillary orthognathic surgery via 3D CASNOS protocol can achieve a desired and stable result of TMJ position in treating skeletal class III adult patients with retrognathic maxilla and prognathic mandible.

scholarly journals Disentangling the effects of CAD/CAM customized appliances and piezocision in orthodontic treatment: New evidence

2021 ◽  
Author(s):  
Carole Charavet ◽  
Dorien Van Hede ◽  
Nathalie Maes ◽  
Adelin Albert ◽  
France Lambert
Keyword(s):  
Computer Aided Design ◽  
Orthodontic Treatment ◽  
Treatment Time ◽  
Fine Tuning ◽  
Overall Treatment Time ◽  
End Of Treatment ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
New Evidence

ABSTRACT Objectives To discern the effects of computer-aided design (CAD)/computer-aided manufactured (CAM) customized appliances and piezocision on orthodontic treatment (OT). Materials and Methods The study combined findings from two previously published randomized controlled trials: (1) standard OT vs piezocision-assisted standard OT, and (2) CAD/CAM OT vs piezocision-assisted CAD/CAM OT. Piezocision is a minimally invasive corticotomy surgical procedure used to accelerate orthodontic treatment and CAD/CAM refers to CAD/CAM customized brackets and archwires. The outcomes were the overall treatment time, and the durations of the alignment phase and fine-tuning phase. Clinical and radiological features also were evaluated. Results The combined study included 48 patients with similar baseline characteristics. Compared to the standard treatment, CAD/CAM technology alone significantly decreased the overall median OT time from 543 to 394 days (P &lt; .001) and from 543 to 254 days (P &lt; .0001) when combined with piezocision. Although piezocision significantly reduced the duration of the alignment phase in the mandible and maxilla, CAD/CAM technology considerably shortened the fine-tuning phase. All periodontal and radiographic parameters remained stable from the start to the end of treatment in all groups. Conclusions CAD/CAM technology combined with piezocision accelerates the entire OT process, during the alignment phase for piezocision and during the fine-tuning phase for CAD/CAM, with a global reduction of the overall treatment time of more than 50%.

scholarly journals Three-dimensional surgical guide approach to correcting skeletal Class II malocclusion with idiopathic condylar resorption

2020 ◽  
Author(s):  
Hongzhe Wang ◽  
Chaoran Xue ◽  
En Luo ◽  
Wenyu Dai ◽  
Rui Shu
Keyword(s):  
Computer Aided Design ◽  
Treatment Time ◽  
Three Dimensional ◽  
Class Ii ◽  
Sagittal Split Ramus Osteotomy ◽  
Skeletal Class ◽  
Surgical Guide ◽  
Centric Relation ◽  
Skeletal Class Ii ◽  
Computer Aided

ABSTRACT Treatment of skeletal Class II patients with dual bite and idiopathic condylar resorption (ICR) is challenging for orthodontists because of the unstable position of the mandible as well as skeletal relapse attributed to improper seating of the mandibular condyles. This case report describes the successful treatment of an 18-year-old Mongolian man diagnosed with centric relation–maximum intercuspation discrepancy and ICR. After making a definitive diagnosis from verified centric relation using bilateral manipulation, orthodontic treatment was initiated followed by three-dimensional computer-aided design/computer-aided manufacturing prebent titanium plate–guided sagittal split ramus osteotomy and genioplasty. Postoperative 3D superimposition demonstrated that this surgical guide approach provided accurate repositioning of the condyles, which were well positioned in the fossae. Complete orthodontic and surgical treatment time was 24 months. The patient's facial appearance and occlusion improved significantly, and a stable result was obtained with a 1-year follow-up.

Three-dimensional virtual surgical planning (3D-VSP) in orthognathic surgery: Advantages, disadvantages and pitfalls

2020 ◽  
pp. 146531252095487
Author(s):  
Chris D Donaldson ◽  
Mehmet Manisali ◽  
Farhad B Naini
Keyword(s):  
Computer Aided Design ◽  
Orthognathic Surgery ◽  
Surgical Planning ◽  
Three Dimensional ◽  
Open Bite ◽  
Anterior Open Bite ◽  
Skeletal Class ◽  
Virtual Surgical Planning ◽  
Skeletal Class Ii ◽  
Computer Aided

In this article, the advantages, disadvantages and pitfalls of three-dimensional virtual surgical planning (3D-VSP) compared to traditional two-dimensional (2D) planning methods in orthognathic surgery are discussed, alongside a standardised protocol that can be utilised. A skeletal Class II, skeletal Class III and an anterior open bite clinical case along with their 3D-VSP management are presented, highlighting modifications that can be made to computer-aided design/computer-aided manufacture (CAD/CAM) cutting guide and plate designs.

Three-Dimensional Pharyngeal Airway Changes After 2-Jaw Orthognathic Surgery With Segmentation in Dento-Skeletal Class III Patients

2019 ◽  
Vol 30 (5) ◽  
pp. 1533-1538 ◽  
Author(s):  
Su Keng Tan ◽  
Alexander T.H. Tang ◽  
Wai Keung Leung ◽  
Roger A. Zwahlen
Keyword(s):  
Orthognathic Surgery ◽  
Three Dimensional ◽  
Class Iii ◽  
Skeletal Class ◽  
Pharyngeal Airway
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