Computer-aided surgical workflow in a surgery – First orthognathic approach to correct anterior open bite in a young adult with temporomandibular disorders

2021 ◽  
Author(s):  
Xiaoyue Xiao ◽  
Ye Cheng ◽  
Shujuan Zou ◽  
Jianwei Chen
Keyword(s):  
Young Adult ◽  
Temporomandibular Disorders ◽  
Open Bite ◽  
Anterior Open Bite ◽  
Surgical Workflow ◽  
Computer Aided ◽  
Surgery First

Occlusal Force and Condylar Motion in Patients with Anterior Open Bite

2005 ◽  
Vol 84 (2) ◽  
pp. 133-137 ◽  
Author(s):  
S. Miyawaki ◽  
Y. Araki ◽  
Y. Tanimoto ◽  
A. Katayama ◽  
A. Fujii ◽  
...  
Keyword(s):  
Temporomandibular Disorders ◽  
Hypothesis Test ◽  
Test Group ◽  
Normal Subjects ◽  
Open Bite ◽  
Control Groups ◽  
Anterior Open Bite ◽  
Occlusal Force ◽  
Control Subjects ◽  
And Control

Patients with open bite often show a weak occlusal force and temporomandibular disorders (TMDs). If these are the main cause of open bite, it may be hypothesized that both pre-pubertal and adult open-bite patients would show a weak occlusal force and abnormal condylar motion. The purpose of this study was to test this hypothesis. Test group subjects consisted of 13 consecutive pre-pubertal and 13 adult patients with anterior open bite. They were compared with age-matched normal subjects. The adult open-bite group showed a weaker occlusal force and a shorter range of condylar motion compared with the control subjects. In the pre-pubertal subjects, however, there were no significant differences in the occlusal force and range of condylar motion between the open-bite and control groups. Therefore, these results suggest that a weak occlusal force or TMDs may not be the main cause of open bite.

scholarly journals Treatment of adult patient with hyperdivergent retrognathic phenotype and anterior open bite: report of a case with non-surgical orthodontic approach

2020 ◽  
Vol 25 (4) ◽  
pp. 75-84
Author(s):  
Marinho Del Santo Jr
Keyword(s):  
Young Adult ◽  
Adult Patient ◽  
Orthognathic Surgery ◽  
Clinical Case ◽  
Open Bite ◽  
Therapeutic Result ◽  
Anterior Open Bite ◽  
Young Adult Patient ◽  
Molar Intrusion

ABSTRACT Adult patients with anterior open bite and hyperdivergent retrognathic phenotype demand complex treatments, as premolar extractions, molar intrusion or orthognathic surgery. In the present clinical case, a young adult patient without significant growth, with Class I and anterior open bite, was treated with four premolar extractions. The therapeutic result shows good intercuspation, good facial esthetic, good function balance, and stability in a two-year post-fixed treatment follow-up.

scholarly journals Mechanism of Multi-loop Edgewise Archwire technique in correcting anterior open bites of Class II malocclusion patients with temporomandibular disorders - cephalometric assessment

2020 ◽  
Author(s):  
Huanye Liu ◽  
Heeyeon Suh ◽  
Young-Eun Jung ◽  
Kaiyuan Xu ◽  
Dan Zhang ◽  
...  
Keyword(s):  
Temporomandibular Disorders ◽  
Orthodontic Treatment ◽  
Open Bite ◽  
Etiologic Factor ◽  
Class Ii Malocclusion ◽  
Anterior Open Bite ◽  
Anterior Teeth ◽  
Primary Mechanism ◽  
Cephalometric Measurements ◽  
Paired T Test

Abstract Background: An anterior open bite is considered challenging to treat because of its multifactorial etiology. Condylar resorption, which is one of the temporomandibular disorders (TMD) symptoms, has been identified as an etiologic factor of anterior open bites. It is essential to find an effective and efficient method to correct open bites while reducing the risk of exacerbating TMD during orthodontic treatment.Objectives: To evaluate the effect of the multi-loop edgewise archwire (MEAW) technique in correcting anterior open bite in patients with TMD. Materials and Methods: In this retrospective study, 20 patients with anterior open bites and TMD were included. 19 cephalometric measurements and 2 open bite indices were evaluated. A paired t-test was used to assess changes between pre- and post-treatments. Results: There were statistically significant changes after the treatment using the MEAW technique. The cephalometric measurements, including vertical positions of the incisors and molars, changed significantly. The maxillary and mandibular regional superimpositions for a subgroup of non-extraction patients showed slight intrusion of the upper molars (-0.6±1.0mm, p=0.04) and slight extrusion of the lower molars (1.0±1.1mm, p<0.01). Open bite correction was achieved predominantly through retraction and extrusion of the upper and lower incisors. Conclusions: The anterior open bite was successfully corrected by using the MEAW technique. However, the primary mechanism was the extrusion of the anterior teeth with a maintained vertical dimension. In the absence of apparent symptoms of joint discomfort, it is effective and relatively safe to use the MEAW technique to treat open bite patients with TMD.

scholarly journals Factors Affecting Total Treatment Time in Patients Treated with Orthognathic Surgery Using the Surgery-First Approach: Multivariable Analysis Using 3D CT and Scanned Dental Casts

2020 ◽  
Vol 9 (3) ◽  
pp. 641
Author(s):  
Jun-Young Kim ◽  
Jin Hoo Park ◽  
Hwi-Dong Jung ◽  
Young-Soo Jung
Keyword(s):  
Orthognathic Surgery ◽  
Treatment Time ◽  
Open Bite ◽  
3D Ct ◽  
Anterior Open Bite ◽  
Factors Affecting ◽  
Contact Points ◽  
Total Treatment Time ◽  
Total Treatment ◽  
Surgery First

The aim of this study was to analyze factors affecting treatment times in patients treated with the surgery-first approach (SFA) for orthognathic surgery. Fifty skeletal class III patients who had undergone SFA bimaxillary orthognathic surgery were enrolled. Retrospective chart reviews and analysis of 3D CT and digitally scanned casts were conducted to assess the total treatment time. Statistical analysis was then performed with multiple study variables. Longer treatment times were required for patients with severe maxillary or mandibular teeth crowding (p = 0.009), a preoperative anterior open bite (p = 0.021), and those undergoing orthodontic extractions (p < 0.001). Longer treatment times were also observed when setting surgical occlusion in the postoperative anterior open bite (p = 0.007) and in patients with postoperative dental midline deviation (p < 0.001) and transverse maxillary deficiencies (p = 0.035). Treatment times were shorter when a class I molar key was formed in the surgical occlusion setup (p = 0.002) and in bilateral anterior and posterior occlusion with a minimum of four contact points (p < 0.001). The number of contact points, the number of extracted teeth, and postoperative midline deviation were identified as significant predictors. These results suggest that proper patient selection is important when considering SFA and that surgeons can reduce total treatment time with an appropriate surgical occlusion setup.

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.

Mechanism of Multi-loop Edgewise Archwire technique in correcting Class II anterior open bites with temporomandibular disorders – a retrospective cephalometric study in Chinese patients 

2020 ◽  
Author(s):  
Huanye Liu ◽  
Heeyeon Suh ◽  
Young-Eun Jung ◽  
Kaiyuan Xu ◽  
Dan Zhang ◽  
...  
Keyword(s):  
Temporomandibular Disorders ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Open Bite ◽  
Chinese Patients ◽  
Etiologic Factor ◽  
Anterior Open Bite ◽  
Anterior Teeth ◽  
Cephalometric Study ◽  
Cephalometric Measurements

Abstract Background: An anterior open bite is considered challenging to treat because of its multifactorial etiology. Condylar resorption, which is one of the temporomandibular disorders (TMD) symptoms, has been identified as an etiologic factor of anterior open bites. It is essential to find an effective and efficient method to correct open bites while reducing the risk of exacerbating TMD during orthodontic treatment.Objectives: To evaluate the effect of the multi-loop edgewise archwire (MEAW) technique in correcting anterior open bite in patients with TMD. Materials and Methods: In this retrospective study, 20 patients with anterior open bites and TMD were included. 19 cephalometric measurements and 2 open bite indices were evaluated. A paired t-test was used to assess changes between pre- and post-treatments. Results: There were statistically significant changes after the treatment using the MEAW technique. The cephalometric measurements, including vertical positions of the incisors and molars, changed significantly. The maxillary and mandibular regional superimpositions for a subgroup of non-extraction patients showed slight intrusion of the upper molars (-0.6±1.0mm, p=0.04) and slight extrusion of the lower molars (1.0±1.1mm, p<0.01). Open bite correction was achieved predominantly through retraction and extrusion of the upper and lower incisors. Conclusions: The MEAW technique can be an effective method in correcting anterior open bites in Class II patients with TMD. Anterior open bites were corrected mainly by extrusion and retraction of the anterior teeth. The vertical dimension was maintained for the upper molars, but the mandibular molars were extruded. During treatment, the patients who had TMD did not show evident recurrence or worsening of their TMD conditions, indicating that orthodontic treatment can be performed when required.

Oral Myofunctional and Articulation Disorders in Children with Malocclusions: A Systematic Review

2021 ◽  
pp. 1-16
Author(s):  
Zoë Thijs ◽  
Laura Bruneel ◽  
Guy De Pauw ◽  
Kristiane M. Van Lierde
Keyword(s):  
Systematic Review ◽  
Risk Of Bias ◽  
Open Bite ◽  
Anterior Open Bite ◽  
Eligibility Criteria ◽  
High Prevalence ◽  
Tongue Position ◽  
Articulation Disorders ◽  
Level 2 ◽  
Unclear Risk

<b><i>Background:</i></b> Relationships between malocclusion and orofacial myofunctional disorders (OMD), as well as malocclusions and articulation disorders (AD) have been described, though the exact relationships remain unclear. Given the high prevalence of these disorders in children, more clarity is needed. <b><i>Summary:</i></b> The purpose of this study was to determine the association between OMD (specifically, bruxism, deviate swallowing, caudal resting tongue posture, and biting habits), AD, and malocclusions in children and adolescents aged between 3 and 18 years. To conduct a systematic review, 4 databases were searched (MEDLINE, Embase, Web of Science, and Scopus). The identified articles were screened for the eligibility criteria. Data were extracted from the selected articles and quality assessment was performed using the tool of Munn et al. [Int J Health Policy Manag. 2014;3:123–81] in consensus. Using the search strategy, the authors identified 2,652 articles after the removal of duplicates. After reviewing the eligibility criteria, 17 articles were included in this study. One of the included articles was deemed to have an unclear risk of bias, whereas all other articles were considered to have a low risk of bias. The articles showed a relationship between anterior open bite and apico-alveolar articulatory distortions, as well as between anterior open bite and deviate swallowing. For the biting habits, bruxism, and low tongue position no clear conclusions could be drawn. <b><i>Key Messages:</i></b> The current review suggests a link between specific types of malocclusion and OMD and AD. However, more high-quality evidence (level 1 and level 2, Oxford Levels of Evidence) is needed to clarify the cooccurrence of other OMD, AD, and malocclusions.

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