scholarly journals INTRUSION ARC IN ORTHODONTIC:

2021 ◽  
Vol 1 (06) ◽  
Author(s):  
Mirna Liz da Cruz ◽  
Glaucia Alves Paiva ◽  
Angelita S. Mendes de Castro
Keyword(s):  
Successful Treatment ◽  
Clinical Characteristics ◽  
Mechanical Stability ◽  
Anterior Segment ◽  
Posterior Teeth ◽  
Deep Bite ◽  
Alloy Wire ◽  
Anterior Teeth ◽  
Constant Magnitude ◽  
Division 2

The intrusion arch is a device for orthodontic anterior teeth intrusion, having been introduced by Burstone in 1977 for the treatment of deep bite, especially in the case of Class II division 2. But they are based on the origin of malocclusion and the patient's clinical characteristics, such as smile line, vertical dimension, predicted growth, among others. Use of this arc is governed by the principles of mechanical intrusion, which include obtaining a pure no intrusion proclination movements, therefore, necessary for successful treatment. Among these we can highlight to get a constant magnitude of force and the choice of point of application of force in the anterior segment, which would determine whether the motion would be pure intrusion or intrusion inclined. The mechanical stability of this is making it more advantageous in the treatment of deep bite in relation to treatment with extrusion of posterior teeth, which is notoriously prone to relapse. Thus, based on the principles of mechanics and its stability, several authors have developed some type of intrusion arches, using the original biomechanics, but differing mainly in the type of alloy wire and the point of application of force to the center of resistance to achieve the goals of the treatment

scholarly journals Full mouth rehabilitation of Kennedy class 1 edentulous situation complicated with excessive deep bite: an interdisciplinary approach

2018 ◽  
Vol 4 (6) ◽  
pp. 1493
Author(s):  
Bhushan Kumar ◽  
A. Navin Kumar ◽  
Prabhdeep Kaur Sandhu
Keyword(s):  
Anterior Segment ◽  
Interdisciplinary Approach ◽  
Functional Improvement ◽  
Oral Rehabilitation ◽  
Posterior Teeth ◽  
Deep Bite ◽  
Anterior Teeth ◽  
Class 1 ◽  
Full Mouth Rehabilitation ◽  
Natural Dentition

<p class="abstract">Oral rehabilitation of bilateral mandibular edentulous posterior segments becomes even more difficult if patient had severe deep bite in natural dentition. This case report demonstrates the intelligent way of managing severe deep-bite by adapting multi-disciplinary approach. Involved steps are: Mandibular subapical osteotomy of mandibular anterior segment to lower down the fragment; secondly, the maxillary anteriors were done with crown lengthening followed by decreased incisal display and thirdly by restoring vertical dimension of occlusion by replacement of missing posterior teeth. The addition of surgical intervention (anterior mandibular osteotomy) in the present case has found to be effective and quick adjunctive in achieving functional improvement in occlusion by reducing anterior teeth overlap (deep bite), by decreasing incisal guidance steepness and esthetic display of anterior teeth. Bilateral edentulous situation was managed by precision attachment retained cast partial denture. A satisfactory functional and esthetic result was obtained.</p>

scholarly journals Orthodontically Management of Non-extraction Class-II Division 2 Malocclusion- A Case Report

2013 ◽  
Vol 2 (2) ◽  
pp. 46-47
Author(s):  
Hasnat Jahan ◽  
Himadri Shekhar Roy Chowdhury ◽  
Mohammad Emadul Haq ◽  
Md Zakir Hossain
Keyword(s):  
Case Report ◽  
Class Ii ◽  
Deep Bite ◽  
Orthodontic Therapy ◽  
Anterior Teeth ◽  
Division 2

A patient of 21 years old presented with Class II division 2 malocclusion and deep overbite, was treated by fixed orthodontic therapy. After completion of the treatment, extreme deep bite was corrected, proclination of upper anterior teeth and patient was satisfied with new position of his upper anterior teeth. DOI: http://dx.doi.org/10.3329/bjodfo.v2i2.16166 Ban J Orthod & Dentofac Orthop, April 2012; Vol-2, No.2, 46-47

scholarly journals A Case report of Class II Division 2 Malocclusion in Adult women treated by Fixed appliance with CIA and removable anchor plate incorporated bite plane: Biomechanical Considerations

2013 ◽  
Vol 1 (2) ◽  
pp. 18-24
Author(s):  
MH Sattar
Keyword(s):  
Class Ii ◽  
Nickel Titanium ◽  
Molar Tooth ◽  
Anchor Plate ◽  
Deep Bite ◽  
Anterior Teeth ◽  
Soft Tissue Profile ◽  
Division 2 ◽  
Gummy Smile ◽  
Lower Incisors

This article describes our treatment of Class II, division 2 adult patients requiring premolar extractions. Division 2 cases are often characterized by severe deep bites, lingually inclined upper central and lower incisors, and labially flared maxillary lateral incisors. This patients also tend to exhibit problems with the upper and lower occlusal planes, such as deep curves of Spee, High lip line, marked labiomental depression. Because of the deep bite and supra eruption of the maxillary incisors, the gingival margins of the maxillary anterior teeth are malaligned, and the lingually inclined mandibular incisors have excessively high gingival margins ( Fig. 1 ). The treatment protocol for this patients includes extraction of premolars both upper and lower in right side to relieve crowding, with simultaneous correction of the deep bite by intrusion of the upper and/or lower incisors. Intrusion mechanics are performed with a bite opening bend on a preformed nickel titanium arch wire. Space closure is accomplished with power chain and guard behind the extracted site in anchor plate. Extraction of upper premolar and lower 1st molar (tooth no 36) in left side was done earlier. A 21 years old women with Cl-II Div-II malocclusion type B came to Dental Centre, Dhaka, with chief complaint of an unhappy smile. Retroclined 4 Incisors, Deep bite, Crowding, deficient lower facial height, Gummy smile and a moderately convex hard- and soft-tissue profile because of a retrusive mandible with over jet of 1.5mm and over bite of 6 mm was observed. The mechanics plan should be individualized based on the specific treatment goals. Camouflage Treatment was done with the help of an anchor plate incorporated anterior incline plane. Intrusion mechanics are performed with preformed nickel titanium Connecticut Intrusion Arch (CIA) and anchor plate incorporated bite plane. Treatment was successfully completed with extractions of both pre-molars in right side and left lower 1st molar (Tooth no 36) and upper 1st premolar(Tooth no 24) already extracted ( Fig. 2 A) before starting of orthodontic treatment. Treatment of 20 months which improves incisor inclination, Deep bite correction; eliminate crowding, normal smile line and improvement of gummy smile. With the above mentioned protocol normal inclination of both upper-lower incisor, normal over jet and over bite were also achieved. DOI: http://dx.doi.org/10.3329/bjodfo.v1i2.15987 Ban J Orthod & Dentofac Orthop, April 2011; Vol-1, No.2, 18-24

scholarly journals Bruxismo Infantil: Uma Revisão de Literatura / Children's Bruxism: A Literature Review

2021 ◽  
Vol 15 (58) ◽  
pp. 1-10
Author(s):  
Adrielle Barbosa Neves ◽  
Carla De Oliveira Freire ◽  
Edite Novais Borges Pinchemel
Keyword(s):  
Literature Review ◽  
Clinical Characteristics ◽  
Signs And Symptoms ◽  
Pediatric Dentistry ◽  
Masticatory Muscles ◽  
Accurate Diagnosis ◽  
Posterior Teeth ◽  
Etiological Factors ◽  
Anterior Teeth ◽  
Common Sign

Resumo: O objetivo do presente estudo foi discutir aspectos do bruxismo infantil através de uma revisão de literatura, abordando os fatores etiológicos bem como sinais, sintomas e características clínicas desta condição. É de grande importância o domínio dos sinais e sintomas para um diagnóstico mais preciso pelos profissionais da odontopediatria.  O  tratamento é multidisciplinar para esta condição parafuncional. Os resultados demonstraram ser o bruxismo um hábito não funcional da função mastigatória, que se caracteriza , pelo  ato de apertar ou ranger os dentes, ocorrendo tanto durante o dia como no momento do sono. A etiologia é multifatorial e a literatura apresenta diversos, tais como fatores associados: dentário, fisiológico,  psicológico e neurológico. O sinal mais comum é um certo desgaste nas  faces incisais, principalmente dos dentes anteriores e, oclusais nos dentes posteriores. Também tende a ocasionar hipersensibilidade dentária, fratura  de cúspides e restaurações e hipertonicidade dos músculos  mastigatórios.  Concluiu-se que conhecer os fatores etiológicos e as  características clínicas do bruxismo na infância é importante para um diagnóstico o mais  rápido possível, permitindo um tratamento precoce que favoreça o bem-estar da criança. Palavras-chave: bruxismo; crianças; odontopediatria.  Abstract: The aim of this study was to discuss aspects of childhood bruxism through a literature review, addressing the etiological factors as well as signs, symptoms and clinical characteristics of this condition. It is very important to master the signs and symptoms for a more accurate diagnosis by pediatric dentistry professionals. Treatment is multidisciplinary for this parafunctional condition. The results showed that bruxism is a non-functional habit of the masticatory function, which is characterized by the act of squeezing or grinding the teeth, occurring both during the day and during sleep. The etiology is multifactorial and the literature presents several, such as associated factors: dental, physiological, psychological and neurological. The most common sign is some wear on the incisal surfaces, especially on the anterior teeth, and occlusal on the posterior teeth. It also tends to cause tooth hypersensitivity, fracture of the cusps and restorations, and hypertonicity of masticatory muscles. It was concluded that knowing the etiological factors and clinical characteristics of bruxism in childhood is important for a diagnosis as quickly as possible, allowing an early treatment that favors the child's well-being.Keywords: bruxism; kids; pediatric dentistry.

scholarly journals Initial forces experienced by the anterior and posterior teeth during dental-anchored or skeletal-anchored en masse retraction in vitro

2016 ◽  
Vol 87 (4) ◽  
pp. 549-555 ◽  
Author(s):  
David Lee ◽  
Giseon Heo ◽  
Tarek El-Bialy ◽  
Jason P. Carey ◽  
Paul W. Major ◽  
...  
Keyword(s):  
Anterior Segment ◽  
Nickel Titanium ◽  
Skeletal Anchorage ◽  
Posterior Teeth ◽  
Treatment Groups ◽  
Anterior Teeth ◽  
Retraction Force ◽  
En Masse Retraction ◽  
Maxillary Arch

ABSTRACT Objective: To investigate initial forces acting on teeth around the arch during en masse retraction using an in vitro Orthodontic SIMulator (OSIM). Materials and Methods: The OSIM was used to represent the full maxillary arch in a case wherein both first premolars had been extracted. Dental and skeletal anchorage to a posted archwire and skeletal anchorage to a 10-mm power arm were all simulated. A 0.019 × 0.025-inch stainless steel archwire was used in all cases, and 15-mm light nickel-titanium springs were activated to approximately 150 g on both sides of the arch. A sample size of n = 40 springs were tested for each of the three groups. Multivariate analysis of variance (α = 0.05) was used to determine differences between treatment groups. Results: In the anterior segment, it was found that skeletal anchorage with power arms generated the largest retraction force (P &lt; .001). The largest vertical forces on the unit were generated using skeletal anchorage, followed by skeletal anchorage with power arms, and finally dental anchorage. Power arms were found to generate larger intrusive forces on the lateral incisors and extrusive forces on the canines than on other groups. For the posterior anchorage unit, dental anchorage generated the largest protraction and palatal forces. Negligible forces were measured for both skeletal anchorage groups. Vertical forces on the posterior unit were minimal in all cases (&lt;0.1 N). Conclusions: All retraction methods produced sufficient forces to retract the anterior teeth during en masse retraction. Skeletal anchorage reduced forces on the posterior teeth but introduced greater vertical forces on the anterior teeth.

scholarly journals Intrusion Effects on Maxillary Anteriors using Mini Implant Anchorage and K-Sir Loop in Subjects with Deep Overbite- A Cohort Study

2020 ◽  
Author(s):  
Purva Verma ◽  
Ravindra Kumar Jain
Keyword(s):  
Cohort Study ◽  
T Test ◽  
P Value ◽  
Posterior Teeth ◽  
Deep Bite ◽  
Anterior Teeth ◽  
Lateral Cephalograms ◽  
Group A ◽  
Group B ◽  
Implant Anchorage

Introduction: Various options to treat deep bites nonsurgically involve extrusion of posterior teeth or intrusion of anterior teeth. Intrusion of anterior teeth is required in patients with excessive incisal display and to correct deep bite in adult patients when extrusion of posterior teeth is not desirable. Aim: To compare the rate of intrusion and dento-alveolar effects on maxillary anterior teeth by Kalra-Simultaneous Intrusion and Retraction loop (K-SIR loop) and Mini implant anchorage in subjects with deep overbite. Materials and Methods: This prospective cohort study included 12 patients with Class I or Class II Div 1 malocclusion having an overbite and overjet of >4 mm treated with therapeutic extractions of upper first premolars. Group A included six subjects treated using orthodontic Mini implants, while Group B had six subjects treated with K-SIR loop. Lateral cephalograms were taken before intrusion and retraction (T1) and at the end of six months (T2) into intrusion and retraction. Independent t-test and paired t-test was done for intergroup and intragroup comparison respectively. Results: The rate of intrusion was 0.38 mm/month and 0.31 mm/month for Group A and Group B, respectively. The amount of intrusion was significantly more in Temporary Anchorage Devices (TAD) group (p-value <0.01). Conclusion: In the TAD group, rate and amount of intrusion was significantly higher. There is no difference in vertical control between the two modalities statistically significant amount of molar extrusion was seen with the K-SIR loop group.

scholarly journals Severe Gingival Recession Caused by Traumatic Occlusion and Mucogingival Stress: A Case Report

2008 ◽  
Vol 02 (02) ◽  
pp. 127-133 ◽  
Author(s):  
Kemal Ustun ◽  
Zafer Sari ◽  
Hasan Orucoglu ◽  
Ismetdir Duran ◽  
Sema S Hakki
Keyword(s):  
Maxillofacial Surgery ◽  
Anterior Segment ◽  
Gingival Recession ◽  
Root Surface ◽  
Periodontal Treatment ◽  
Gingival Tissue ◽  
Class Iii ◽  
Deep Bite ◽  
Anterior Teeth ◽  
Attached Gingiva

ABSTRACTGingival recession is displacement of the soft tissue margin apically leading to root surface exposure. Tooth malpositions, high muscle attachment, frenal pull have been associated with gingival tissue recession. Occlusal trauma is defined as injury resulting in tissue changes within the attachment apparatus as a result of occlusal forces. Trauma from occlusion may cause a shift in tooth position and the direction of the movement depends on the occlusal force. We present the clinical and radiological findings and the limitation of periodontal treatment of a severe gingival recession in a case with traumatic occlusion. A 16 years old male, systemically healthy and nonsmoking patient presented to our clinic with severe gingival recession of mandibular canines and incisors. Clinical evaluation revealed extensive gingival recession on the vestibules of mandibular anterior segment. Patient has an Angle class III malocclusion and deep bite. To maintain the teeth until orthodontic therapy and maxillofacial surgery, mucogingival surgeries were performed to obtain attached gingiva to provide oral hygiene and reduce inflammation. After mucogingival surgeries, limited attached gingiva was gained in this case. Regular periodontal maintenance therapy was performed at 2 month intervals to preserve mandibular anterior teeth. Multidisciplinary approach should be performed in this kind of case for satisfactory results. Unless occlusal relationship was corrected, treatment of severe gingival recession will be problematic. For satisfactory periodontal treatment, early diagnosis of trauma from occlusion and its treatment is very important. (Eur J Dent 2008;2:127-133)

scholarly journals Etiologies and clinical characteristics of young patients with angle-closure glaucoma: a 15-year single-center retrospective study

2021 ◽  
Author(s):  
Feng Gao ◽  
Jiajian Wang ◽  
Junyi Chen ◽  
Xiaolei Wang ◽  
Yuhong Chen ◽  
...  
Keyword(s):  
Clinical Characteristics ◽  
Anterior Segment ◽  
Young Patients ◽  
Case Series ◽  
Neovascular Glaucoma ◽  
Angle Closure Glaucoma ◽  
Angle Closure ◽  
Primary Angle Closure Glaucoma ◽  
Uncommon Presentation ◽  
Underlying Causes

Abstract Purpose To investigate the etiologies and the clinical characteristics of angle-closure glaucoma (ACG) patients younger than 40 years old in Chinese. Methods Inpatients with diagnosis of ACG and diagnosed age younger than or equal to 40 years old, who were admitted in Eye, Ear, Nose, and Throat Hospital Fudan University from 2002 to 2017, were included in this retrospective non-comparative case series. The underlying causes and clinical features for all the patients were analyzed by comprehensive review of medical charts. Results A total of 298 patients (463 eyes) met the criteria, including 153 females (51.3%) and 145 males (48.7%); the mean age was 25.6 ± 13.0 years. Primary angle-closure glaucoma (PACG), uveitis, and anterior segment dysgenesis (ASD) were the top three etiologies in our patients, which accounted for 32.6%, 20.3%, and 15.1% of the total patients respectively. PACG mainly occurs after 30 years of age and ASD is the top reason of ACG in patients younger than 20 years old. Other known etiologies include iridocorneal endothelial syndrome, neovascular glaucoma, nanophthalmos, retinitis pigmentosa, spherophakia, bestrophinopathy, persistent fetal vasculature, iridociliary cysts, congenital retinoschisis, Marfan’s syndrome, retinopathy of prematurity, familial exudative vitreoretinopathy, congenital retinal folds, Coat’s disease, and neurofibromatosis. Conclusions We described the uncommon presentation of ACG in Chinese young patients. Although unusual, most of the etiologies could be identified. Therefore, more careful and comprehensive examinations are needed for early detection and timely treatment for young ACG patients.

scholarly journals Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Youn-Gyeong Moon ◽  
Kyung-Min Lee
Keyword(s):  
Third Molar ◽  
Careful Consideration ◽  
Missing Teeth ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Posterior Quadrant ◽  
Left Posterior ◽  
The Right ◽  
Best Fit ◽  
Posterior Area

Abstract Objective To compare the accuracy of complete-arch scans and quadrant scans obtained using a direct chairside intraoral scanner. Material and methods Intraoral scans were obtained from 20 adults without missing teeth except for the third molar. Maxillary and mandibular complete-arch scans were carried out, and 4 quadrant scans for each arch were performed to obtain right posterior, right anterior, left anterior, and left posterior quadrant scans. Complete-arch scans and quadrant scans were compared with corresponding model scans using best-fit surface-based registration. Shell/shell deviations were computed for complete-arch scans and quadrant scans and compared between the complete-arch scans and each quadrant scans. In addition, shell/shell deviations were calculated also for each individual tooth in complete-arch scans to evaluate factors which influence the accuracy of intraoral scans. Results Complete-arch scans showed relatively greater errors (0.09 ~ 0.10 mm) when compared to quadrant scans (0.05 ~ 0.06 mm). The errors were greater in the maxillary scans than in the mandibular scans. The evaluation of errors for each tooth showed that the errors were greater in posterior teeth than in anterior teeth. Comparing the right and left errors, the right side posterior teeth showed a more substantial variance than the left side in the mandibular scans. Conclusion The scanning accuracy has a difference between complete-arch scanning and quadrant scanning, particularly in the posterior teeth. Careful consideration is needed to avoid scanning inaccuracy for maxillary or mandibular complete-arch, particularly in the posterior area because a complete-arch scan might have potential error than a quadrant scan.

scholarly journals Dual-section versus conventional archwire for en-masse retraction of anterior teeth with direct skeletal anchorage: a finite element analysis

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ryo Hamanaka ◽  
Daniele Cantarella ◽  
Luca Lombardo ◽  
Lorena Karanxha ◽  
Massimo Del Fabbro ◽  
...  
Keyword(s):  
Finite Element ◽  
Tooth Movement ◽  
Occlusal Plane ◽  
Skeletal Anchorage ◽  
Element Analysis ◽  
Posterior Teeth ◽  
Posterior Portion ◽  
Anterior Teeth ◽  
Retraction Force ◽  
En Masse Retraction

Abstract Background The aim of this study is to compare the biomechanical effects of the conventional 0.019 × 0.025-in stainless steel archwire with the dual-section archwire when en-masse retraction is performed with sliding mechanics and skeletal anchorage. Methods Models of maxillary dentition equipped with the 0.019 × 0.025-in archwire and the dual-section archwire, whose anterior portion is 0.021 × 0.025-in and posterior portion is 0.018 × 0.025-in were constructed. Then, long-term tooth movement during en-masse retraction was simulated using the finite element method. Power arms of 8, 10, 12 and 14 mm length were employed to control anterior torque, and retraction forces of 2 N were applied with a direct skeletal anchorage. Results For achieving bodily movement of the incisors, power arms longer than 14 mm were required for the 0.019 × 0.025-in archwire, while between 8 and 10 mm for the dual-section archwire. The longer the power arms, the greater the counter-clockwise rotation of the occlusal plane was produced. Frictional resistance generated between the archwire and brackets and tubes on the posterior teeth was smaller than 5% of the retraction force of 2 N. Conclusions The use of dual-section archwire might bring some biomechanical advantages as it allows to apply retraction force at a considerable lower height, and with a reduced occlusal plane rotation, compared to the conventional archwire. Clinical studies are needed to confirm the present results.

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