scholarly journals Total Face Approach (TFA) 3D Cephalometry and Superimposition in Orthognathic Surgery: Evaluation of the Vertical Dimensions in a Consecutive Series

2021 ◽  
Vol 4 (2) ◽  
pp. 36
Author(s):  
Giovanna Perrotti ◽  
Giulia Baccaglione ◽  
Tommaso Clauser ◽  
Riccardo Scaini ◽  
Roberta Grassi ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Cranial Base ◽  
Cone Beam ◽  
Consecutive Series ◽  
Advantages And Disadvantages ◽  
Post Surgery ◽  
Lower Jaw ◽  
Bimaxillary Orthognathic Surgery ◽  
3D Cephalometry

Background: Cephalometry is fundamental in diagnosis, analysis, and planning of orthodontic-surgical treatment as it reveals skeletal relationship between the upper and lower jaw as well as facial aesthetic parameters. Nevertheless, 3D cephalometry has still not become the exam of choice in orthognathic treatment even though today CBCT (Cone Beam Computed Tomography) is routinely used in other branches of dentistry. Methods: In a sample of 13 patients undergoing bimaxillary orthognathic surgery a chin-vertex CBCT exam was prescribed prior to orthodontic treatment (OT) and 12 months after surgery (T1). The DICOM files uploaded to MaterialiseSimplant Ortho software pro 2.1 (Materialise Co., Leuven, Belgium) were analyzed following the multiplane 3D Total Face cephalometry protocol (TFA). Results: Results comparing pre-op and post-op TFA 3D cephalometry, were then evaluated considering reference values reported in literature. The CBCT, carried out pre- and post-surgery, were subsequently analyzed employing the superimposition method using cranial base as reference. The aim of this study is to evaluate the advantages and disadvantages of the two methods in orthognathic surgery. Conclusions: Multiplane 3D TFA allows the clinician to locate where major or minor skeletal discrepancies are found with respect to ideal parameters and is also useful in classifying skeletal intermaxillary relation. The superimposition method is highly intuitive but does not provide information on the quantity and location of osteotomic movement.

scholarly journals Apical Resorption of Upper Incisors and Canines During Orthodontic Treatment in Class III Orthognathic Surgery Patients – a Longitudinal Cone Beam Computer Tomography Study

2017 ◽  
Vol 17 (1) ◽  
pp. 23-28
Author(s):  
Ieva Gavare ◽  
Ilga Urtane ◽  
Gundega Jakobsone ◽  
Laura Neimane
Keyword(s):  
Root Length ◽  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Cone Beam ◽  
Class Iii ◽  
Crown Root ◽  
Post Surgery ◽  
Dentofacial Deformity ◽  
Cone Beam Computer Tomography

Summary Introduction. Although severe root resorption is rare, it is a side effect of orthodontic treatment which affects tooth prognosis. Patients with severe dentofacial deformity, for whom orthodontic treatment and orthognathic surgery was done at the age of 18 and later, had long duration orthodontic treatment and orthognathic surgery, and are at a high risk of root resorption. The impact of orthognathic surgery on root resorption has not been sufficiently studied, and therefore is an interesting topic to research. Aim of the Study. To identify the risk factors for apical root resorption of maxillary incisors and canines as a result of orthodontic and surgical treatment of Class III malocclusion involving LeFort I osteotomy. Material and methods. The root lengths of upper incisors and canines were measured on cone beam computer tomography (CBCT) scans obtained from a database of orthognathic surgery patients. As a criteria for root resorption was chosen the difference in root lengths between different time points. The measurements were performed using the scans taken before orthodontic treatment (T1), before surgery (T2), and after post surgery orthodontic treatment (T3), of 28 subjects, aged 20.5 ± 3.81 years, with the mean presurgery treatment time of 19.9 ± 8.8 months, and post-surgery time of 7.1 ± 3.1 months. Changes in root lengths during different time spans were correlated with treatment duration, the initial crown/root ratio, and the severity of dentofacial deformity (Wits appraisal, ANB angle, and overjet). Results. During T1 - T2 the roots of the lateral incisors shortened by a maximum of 0.78 ± 0.83 mm (p < 0.001), at a rate of 0.04 mm per month. During T2 - T3 the lengths of the central incisor roots decreased most by 0.49 ± 0.52 (p < 0.001) at a rate of 0.07 mm per month. The resorption speed for canines increased from 0.03 mm to 0.1 mm per month before and after surgery. There were statistically significant correlations between the crown-root ratio and the incisor root length (r = 0.319 for lateral and r = 303 for central, both p<0,05) and for canines (r = 482, p<0.01). The associations between the shortened root length, in different time spans for different teeth, and the severity of malocclusion were inconsistent. Conclusions. Overall, the shortened root length during combined orthodontic and surgical treatment might not be clinically significant. After surgery, the rate of root resorption (mm per month) increased, especially for canines. The teeth with initially shorter roots showed more resorption during treatment.

scholarly journals Cone Beam Computed Tomography Study on the Incidence of Endodontic Filling Biomaterials Resorption in Patients With/Without Orthodontic Treatment

2021 ◽  
Vol 6 (2) ◽  
pp. 103-107
Author(s):  
Eugen Bud ◽  
Mariana Păcurar ◽  
Alexandru Vlasa ◽  
Cristina Bica ◽  
Krisztina Martha ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Orthodontic Treatment ◽  
Periodontal Diseases ◽  
Correct Diagnosis ◽  
Cone Beam ◽  
Total Length ◽  
Lower Jaw ◽  
Starting Point ◽  
Study Population ◽  
The Mean

Abstract Background: The differential diagnosis of endodontic and periodontal diseases can sometimes be clinically difficult, but it is vital to establish a correct diagnosis so that predictable treatment can be offered. Aim: The aim of this study was to highlight the prevalence of endo-periodontal lesions in the frontal dental group of the lower jaw depending on the degree of bone resorption as well as endodontic filling resorption in different patients, some of them with orthodontic treatment, using conical beam computed tomography (CBCT). Materials and methods: A number of 31 CBCT imaging volumes and the medical records of these patients were selected for analysis by an experienced examiner. The sites selected for analysis were divided into two subgroups, one where the endodontic treatment was performed with Endomethasone™ (Colthene, Creteil, France) (7 patients), and the other where it was performed with Adseal™ (Meta Biomed, Seoul, South Korea) (6 patients). Results: The mean age of the study population was 24.1 years, and 35.8% presented previous orthodontic treatment in their medical history. There were no statistically significant differences (p = 0.54) between groups regarding the length of the endodontic filling, the Endomethasone group showing a total length of 11.24 millimeters while the Adseal group showed a total length of 10.85 millimeters. Conclusions: The image obtained in clinical situations in which patients present combined endodontic-periodontal lesions is of real help because in many cases, with the help of CBCT, the starting point of a combined lesion can be highlighted, whether it is endodontic or periodontal.

scholarly journals Compensatory orthodontic treatment of skeletal Class III malocclusion with anterior crossbite

2014 ◽  
Vol 19 (1) ◽  
pp. 113-122 ◽  
Author(s):  
José Valladares Neto
Keyword(s):  
Case Report ◽  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Cranial Base ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Orthodontic Movement ◽  
Main Complaint ◽  
Clinical Stability

INTRODUCTION: This case report describes the orthodontic treatment of an adult patient with skeletal Class III malocclusion and anterior crossbite. A short cranial base led to difficulties in establishing a cephalometric diagnosis. The patient's main complaint comprised esthetics of his smile and difficulties in mastication. METHODS: The patient did not have the maxillary first premolars and refused orthognathic surgery. Therefore, the treatment chosen was orthodontic camouflage and extraction of mandibular first premolars. For maxillary retraction, the vertical dimension was temporarily increased to avoid obstacles to orthodontic movement. RESULTS: At the end of the treatment, ideal overjet and overbite were achieved. CONCLUSION: Examination eight years after orthodontic treatment revealed adequate clinical stability. This case report was submitted to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO) as part of the requirements to become a BBO diplomate.

scholarly journals Evaluation of upper airways after bimaxillary orthognathic surgery in patients with skeletal Class III pattern using cone-beam computed tomography

2016 ◽  
Vol 21 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Marília Spínola Azevêdo ◽  
Andre Wilson Machado ◽  
Inêssa da Silva Barbosa ◽  
Lucas Senhorinho Esteves ◽  
Vanessa Álvares Castro Rocha ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Orthognathic Surgery ◽  
Upper Airway ◽  
Cone Beam ◽  
Class Iii ◽  
Upper Airways ◽  
Mandibular Setback ◽  
Maxillary Advancement ◽  
Bimaxillary Orthognathic Surgery

Introduction: It has been suggested that mandibular setback surgery, combined or not with maxillary advancement as a treatment alternative for patients with mandibular prognathism, can induce changes in upper airway space (UAS). Therefore, this study aimed to assess the response of the upper airway in the oropharynx region of patients with Class III skeletal pattern that underwent bimaxillary orthognathic surgery (maxillary advancement and mandibular setback) combined with mentoplasty. Material and Methods: The sample comprised 26 cone-beam computed tomography (CBCT) scans of 13 patients. The examination was taken before and after surgery. UAS volume, sagittal area, length and minimal axial area with its width, depth and location, were measured with the aid of Dolphin ImagingTM software version 11.5 Premium. Data were statistically treated by applying Shapiro-Wilk test and Student's paired t-test, considering as statistically significant the results of which p-value was lower than 0.05. Results: No statistically significant differences were found in any measurements evaluated. Conclusions: No significant changes were observed in the oropharynx after bimaxillary orthognathic surgery and mentoplasty.

scholarly journals Cone beam computed tomography for the diagnosis of external root resorption associated with orthodontic treatment: A review.

2020 ◽  
Vol 8 (3) ◽  
pp. e037
Author(s):  
Mariela Burgos-Urey ◽  
Jhoana Mercedes Llaguno-Rubio
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Imaging Techniques ◽  
Cone Beam ◽  
Advantages And Disadvantages ◽  
External Root Resorption ◽  
Management Protocol

External root resorption (ERR) is a highly prevalent, multifactorial problem frequently associated with orthodontic treatment. Treatment is complex due to the lack of solid knowledge regarding predisposing factors, systematic management for diagnosis and follow-up protocols or thefundamental theoretical bases of adequate imaging tools for each situation. This review describes the indications of the use of cone beam computed tomography (CBCT) and the factors related to its development and the characteristics of the techniques used in the diagnosisand monitoring of ERR in orthodontics. We compared the advantages and disadvantages of CBCT based on the risk/benefits. Methods: We have reviewed and summarized the information and the risk factors available on ERR in orthodontics and the use of CBCT in the diagnosis and follow-up of ERR with the aim of developing a management protocol. Likewise, CBCT is compared with other imaging techniques frequently used in ERR. The articles reviewed in this study coincide in terms of the advantages of precision of CBCT in the detection and linear and volumetric measurement of ERR associated with orthodontics over two-dimensional techniques. However, CBCT cannot completely replace other imaging techniques since its effectiveness is not significantly greater in cases with moderate ERR compromise. The use of CBCT should be optimized following specific criteria for its application. 

Two-Year Postoperative Upper Airway Cone-Beam Computed Tomographic Outcomes Based on a Verified Upper Airway Analysis Following Bimaxillary Orthognathic Surgery

2019 ◽  
Vol 77 (7) ◽  
pp. 1435-1445 ◽  
Author(s):  
Sirwan Fernandez Gurani ◽  
Gabriele Di Carlo ◽  
Jens Jørgen Thorn ◽  
Janne Ingerslev ◽  
Paolo Maria Cattaneo ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Upper Airway ◽  
Cone Beam ◽  
Computed Tomographic ◽  
Bimaxillary Orthognathic Surgery ◽  
Airway Analysis
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