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.

scholarly journals THREE-DIMENSIONAL ASSESSMENT OF THE SAGITTAL CONDYLAR INCLINATION IN SKELETAL CLASS II PATIENTS BASED ON COMPUTER AIDED DIAGNOSIS AXIOGRAPH AND CONE-BEAM COMPUTED TOMOGRAPHY

2021 ◽  
pp. 2140016
Author(s):  
PAN JIANG ◽  
YUXING BAI ◽  
FEI HU ◽  
XUEYANG ZHANG ◽  
QUN YANG ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Three Dimensional ◽  
Class Ii ◽  
Cone Beam ◽  
Skeletal Class ◽  
Average Value ◽  
Skeletal Class Ii ◽  
Computer Aided ◽  
Aided Diagnosis

Great variation has been found in sagittal condylar inclination (SCI) values among individuals with different skeletal structures. Therefore, average value articulators cannot fully represent the physiological characteristics of the mandible, or reproduce its sagittal movements. The purpose of this study was to measure the SCI value of skeletal Class II patients by two different three-dimensional assessments, and to evaluate the correlation and consistency between the two methods. A total of 23 patients (aged 15–65 years) diagnosed with skeletal Class II malocclusion were recruited from the Stomatological Center of Shunde Hospital, Southern Medical University. Subjects were divided into three groups based on different A point–nasion–B point angle (ANB), and angle between the upper central incisor and Frankfort horizontal plane (U1-FH). Bilateral SCI values were measured using computer-aided diagnosis axiography (CADIAX) and cone-beam computed tomography (CBCT). Statistical analysis showed that the SCI value measured by CADIAX was significantly higher than that measured by CBCT. Significant differences were found among different ANB and U1-FH groups, and the average value of the [Formula: see text] group was the highest. Our findings indicate that the measurement of SCI by CADIAX cannot be replaced by CBCT, and it is recommended that personalized measurements of SCI values in skeletal class II patients be carried out. Individual SCI measurement can help coordinate the physiological characteristics of patients in dental treatment, benefit the health of temporomandibular joint and improve the long-term outcome. Our results suggest that the SCI values obtained by CBCT is different from the real SCI values of patients, and we will look for a simpler and more accurate clinical method to measure SCI value in future research.

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.

Abordagem precoce da má oclusão de Classe II esquelética com atresia maxilar e mordida aberta anterior e o uso de alinhadores ClearCorrect – relato de caso

2021 ◽  
Vol 14 (53) ◽  
pp. 97-106
Author(s):  
Roberto Hideo Shimizu ◽  
Isabela Almeida Shimizu ◽  
Ana Cláudia M. Melo Toyoffuku ◽  
Rebecca Marquesini ◽  
Tatiane Travizan Lima ◽  
...  
Keyword(s):  
Treatment Time ◽  
Low Complexity ◽  
Class Ii ◽  
Open Bite ◽  
Class Ii Malocclusion ◽  
Anterior Open Bite ◽  
Skeletal Class ◽  
Posterior Crossbite ◽  
Skeletal Class Ii ◽  
High Predictability

Adequate planning and early treatment of Angle Class II malocclusion with maxillary atresia and anterior open bite provides harmonization of maxillomandibular bone bases in the three planes of space. Orthodontic aligners have emerged as an alternative treatment having the following advantages: being more aesthetic and more comfortable for the patient, less treatment time when they are correctly indicated, less chairside time, less complications, possibility of remote monitoring, easier feeding, and dental hygiene. On the other hand, they offer difficulties to treat adults with severe skeletal Class II malocclusions, posterior crossbite and anterior open bite. Therefore, the objective of this clinical case report is to early correct skeletal Class II malocclusion with maxillary atresia through the use of mechanical orthopedics and devices that help eliminate habits and close the anterior open bite, and later the use of orthodontic aligners to finish the treatment. It was concluded that the early interceptive treatment of malocclusion was efficient to harmonize the bone bases in the anteroposterior, vertical, and transversal directions, changing this malocclusion from high to low complexity and, consequently, highly predictable and with an excellent prognosis for treatment with orthodontic aligners. The treatment with ClearCorrect aligners corrected the occlusion in a shorter period of time when compared to corrective orthodontics and with a high predictability in relation to the virtual setup.

A New Proposal for Three-Dimensional Positioning of the Chin Using a Single Computer-Aided Design/Computer-Aided Manufacturing Surgical Guide

2018 ◽  
Vol 29 (7) ◽  
pp. 1963-1964 ◽  
Author(s):  
Pedro Jorge Cavalcante Costa ◽  
Maurício Silva Demétrio ◽  
Pedro Thalles Bernardo Carvalho Nogueira ◽  
Larissa Raposo Rodrigues ◽  
Paulo Domingos Ribeiro Júnior
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Aided Manufacturing ◽  
Surgical Guide ◽  
Computer Aided ◽  
Aided Design

scholarly journals Nonsurgical and nonprosthetic camouflage treatment of skeletal Class II open bite with bilaterally missing lower first molars

2018 ◽  
Vol 89 (3) ◽  
pp. 505-517. ◽  
Author(s):  
Tung Nguyen ◽  
Eui Seon Baek ◽  
Soonshin Hwang ◽  
Kyung-Ho Kim ◽  
Chooryung J. Chung
Keyword(s):  
Treatment Outcome ◽  
Three Dimensional ◽  
Class Ii ◽  
Open Bite ◽  
Third Molars ◽  
Second Molar ◽  
Skeletal Class ◽  
Long Term Stability ◽  
Skeletal Class Ii

ABSTRACT This report illustrates the successful nonsurgical and nonprosthetic camouflage treatment of a skeletal Class II open bite malocclusion combined with missing mandibular first molars bilaterally. In the mandible, the second and third molars were uprighted and protracted, substituting for the missing first molars. In the maxilla, anterior bodily retraction and full-arch intrusion were achieved following premolar and second molar extraction, which also induced autorotation of the mandible. The treatment outcome and prognosis were confirmed with three-dimensional superimposition techniques, along with long-term stability.

scholarly journals Surgical Orthodontic Treatment of Severe Skeletal Class II

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Fahad F. Alsulaimani ◽  
Maisa O. Al-Sebaei ◽  
Ahmed R. Afify
Keyword(s):  
Orthodontic Treatment ◽  
Anterior Segment ◽  
Class Ii ◽  
Mandibular Advancement ◽  
Sagittal Split Ramus Osteotomy ◽  
Skeletal Class ◽  
Maxillary Osteotomy ◽  
Skeletal Class Ii ◽  
Segment 8 ◽  
Jaw Surgery

This paper describes an adult Saudi male patient who presented with a severe skeletal class II deformity. The case was managed with a combination of presurgical orthodontic treatment followed by a double jaw orthognathic surgery and then another phase of orthodontic treatment for final occlusal detailing. Extraction of the four first premolars was done during the presurgical orthodontic phase of treatment to decompensate upper and lower incisors and to give room for surgical setback of the maxillary anterior segment. Double jaw surgery was performed: bilateral sagittal split ramus osteotomy for 8 mm mandibular advancement combined with three-piece Le Fort I maxillary osteotomy, 6 mm setback of the anterior segment, 8 mm impaction of the maxilla, and 5 mm advancement genioplasty. Although the anteroposterior discrepancy and the facial convexity were so severe, highly acceptable results were obtained, both esthetically as well as occlusally.

scholarly journals Three-dimensional effects of the mini-implant–anchored Forsus Fatigue Resistant Device: A randomized controlled trial

2015 ◽  
Vol 86 (2) ◽  
pp. 292-305 ◽  
Author(s):  
Sherif A. Elkordy ◽  
Amr M. Abouelezz ◽  
Mona M. Salah Fayed ◽  
Khaled H. Attia ◽  
Ramy Abdul Rahman Ishaq ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Three Dimensional ◽  
Class Ii ◽  
Control Group ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Skeletal Effects ◽  
Implant Anchorage ◽  
Mandibular Incisors ◽  
Forsus Fatigue Resistant Device

ABSTRACT Objective:  To detect three-dimensionally the effects of using mini-implant anchorage with the Forsus Fatigue Resistant Device (FFRD). Materials and Methods:  The sample comprised 43 skeletal Class II females with deficient mandibles. They were randomly allocated into three groups: 16 patients (13.25 ± 1.12 years) received FFRD alone (Forsus group), 15 subjects (13.07 ± 1.41 years) received FFRD and mini-implants (FMI group), and 12 subjects (12.71 ± 1.44 years) were in the untreated control group. Three-dimensional analyses of cone beam computed tomographic images were completed, and the data were statistically analyzed. Results:  Class I relationship and overjet correction were achieved in 88% of the cases. None of the two treatment groups showed significant mandibular skeletal effects. In the FMI group, significant headgear effect, decrease in maxillary width, and increase in the lower facial height were noted. In the FMI group, retroclination of maxillary incisors and distalization of maxillary molars were significantly higher. Proclination and intrusion of mandibular incisors were significantly greater in the Forsus group. Conclusions:  FFRD resulted in Class II correction mainly through dentoalveolar effects and with minimal skeletal effects. Utilization of mini-implant anchorage effectively reduced the unfavorable proclination and intrusion of mandibular incisors but did not produce additional skeletal effects.

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