scholarly journals Treatment of Class II malocclusion with bialveolar protrusion by means of unusual extractions and anchorage mini-implant

2012 ◽  
Vol 17 (5) ◽  
pp. 165-177
Author(s):  
Jong-Moon Chae
Keyword(s):  
Class Ii ◽  
Posterior Teeth ◽  
Facial Profile ◽  
Second Molar ◽  
Premolar Extraction ◽  
Anterior Teeth ◽  
Total Treatment ◽  
Maxillary Tuberosity ◽  
Sufficient Space ◽  
En Masse Retraction

INTRODUCTION: Patients with dental Class II bialveolar protrusion are generally treated by extracting the four first premolars or two first and two second premolars, and retracting the anterior teeth. This case report describes the treatment of an adult patient with bialveolar protrusion, a Class II canine and molar relationship, and lip protrusion. METHODS: In this patient, the maxillary right second molar (1.7) had to be extracted due to extensive caries. To create sufficient space to retract the anterior teeth, the maxillary right posterior teeth were distalized with a maxillary posterior mini-implant (1.2~1.3 mm in diameter, 10 mm long), which was placed into the maxillary tuberosity area and allowed an en masse retraction of the maxillary anterior teeth. RESULTS: Overall, mini-implant can provide anchorage to produce a good facial profile even without additional premolar extraction in cases of dental Class II bialveolar protrusion with the hopeless second molar. CONCLUSION: The total treatment period was 42 months and the results were acceptable for 34 months after debonding.

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.

scholarly journals Evaluation of Angular Changes of Canine in En Masse Retraction of Maxillary Anterior Teeth Using Power Arm and Titanium Mini-Implant - A Split Mouth Randomised Control Study

2021 ◽  
Vol 10 (8) ◽  
pp. 522-526
Author(s):  
Harshil Naresh Joshi ◽  
Santosh Kumar Goje ◽  
Narayan Kulkarni ◽  
Romil Shah ◽  
Samarth Chellani ◽  
...  
Keyword(s):  
Tooth Movement ◽  
Angular Position ◽  
Clinical Situation ◽  
Maxillary Canine ◽  
Premolar Extraction ◽  
Anterior Teeth ◽  
The Difference ◽  
The Right ◽  
Implant Anchorage ◽  
En Masse Retraction

BACKGROUND This study was conducted to determine angular changes of maxillary canine in en masse retraction of anterior teeth in a new modified power arm with a conventional intraoral anchorage unit compared to a mini-implant anchorage in the first premolar extraction case. We wanted to compare angular changes of maxillary canine between modified conventional anchorage with a power arm and titanium mini-implant anchorage in en masse retraction. METHODS A total of 15 participants requiring maxillary first premolar extraction was selected for this study. In each participant, the en mass retraction was carried out with miniimplants on one side & modified conventional anchorage with a power arm on the other side. The choice of mode of retraction on the right and the left side was done based on the coin flip method. Angular position of the maxillary canine was evaluated on orthopantomogram (OPG) & diagnostic cast. RESULTS A mean disto-palatal rotation observed post retraction was of 9° on the conventional anchorage side & 9.86° on the mini-implant anchorage side. A mean difference in maxillary canine angulations post retraction was 1.13° on the conventional anchorage side and 0.93° on the mini-implant side. An increase in angle suggested the tipping of canine teeth. The difference was very small which was not statistically & clinically significant. CONCLUSIONS There was no difference in the type of tooth movement during retraction by miniimplant and power arm suggesting minimal variation in teeth movement in the anterior region. So, the choice mainly depends on the type of the anchorage required in the given clinical situation. KEY WORDS Anchorage, Mini-Implant, Power Arm, Type of Tooth Movement

scholarly journals Perawatan Kaninus Ektopik Menggunakan Teknik Begg dengan Pencabutan Premolar Kedua

2016 ◽  
Vol 1 (1) ◽  
pp. 39
Author(s):  
Puspita Ndaru Putri ◽  
Prihandini Iman ◽  
JCP Heryumani
Keyword(s):  
Orthodontic Treatment ◽  
Facial Profile ◽  
Deep Bite ◽  
Anterior Crowding ◽  
Premolar Extraction ◽  
Dental Crowns ◽  
Skeletal Malocclusion ◽  
Anterior Teeth ◽  
Profile Changes ◽  
Lower Arch

Ektopik kaninus seringkali dijumpai dalam praktek bidang ortodontik. Sebagian orang yang merasa terganggu dengan keadaan ini akan datang ke dokter gigi untuk mendapatkan perawatan. Perawatan ortodontik dilakukan untuk mengoreksi gigi yang ektopik dan memperbaiki fungsi estetik. Pada perawatan kasus ektopik kaninus ini, pencabutan gigi premolar kedua dilakukan karena tidak diperlukan perubahan profil. Teknik Begg merupakan teknik ortodontik yang menggunakan gaya ringan dengan kawat busur berpenampang bulat. Kawat busur akan bergerak bebas tanpa friksi dan menghasilkan gerak tipping mahkota gigi. Tujuan dari studi kasus ini adalah untuk memaparkan perawatan kaninus ektopik dalam tahapan teknik Begg. Pasien perempuan usia 19 tahun mengeluhkan gigi depan yang gingsul dan berjejal. Hasil pemeriksaan objektif menunjukkan ektopik pada gigi 13, 23 dan 33, overbite 5 mm, crowding anterior mandibula, dan crossbite anterior pada gigi 22 dan 33. Maloklusi kelas I skeletal dengan protrusif bimaksiler dan protrusif bidental, ektopik kaninus maksila bilateral, ektopik kaninus mandibula unilateral, deep bite, crowding anterior mandibula dan crossbite anterior. Dilakukan perawatan ortodontik cekat teknik Begg multiloop dengan pencabutan 15, 25, 36 dan 46. Sembilan bulan setelah perawatan, crossbite anterior, dan gigi 13, 23 dan 33 yang ektopik telah terkoreksi. Crowding anterior mandibula telah mengalami perbaikan dan perawatan masih berlanjut hingga saat ini. Perawatan teknik Begg multiloop dengan pencabutan gigi premolar kedua merupakan alternatif perawatan untuk koreksi ektopik kaninus, jika tidak diperlukan perubahan profil wajah pasien. ABSTRACT: Ectopic Canines Treatment Using Begg Technique with Second Premolar Extraction. Ectopic canines are often found in the field of orthodontic practice. People who are annoyed with this situation usually come to an orthodontist to seek for treatment. Orthodontic treatment has been performed to correct ectopic teeth and improve the function of aesthetics. In this case of ectopic canines, a second premolars tooth was extracted because profile changes are not required. Begg orthodontic technique is a technique that uses light forces by using round archwire. Archwire will move freely without friction and produce a tipping movement of dental crowns. A 19 year old female patient complained of ectopic and crowding anterior teeth. The objective examinations find ectopic of 13, 23 and 33, overbite: 5 mm, anterior mandibular crowding, and anterior crossbite of 22 and 33. Class I skeletal malocclusion, bimaxillar protrusive, bidental protrusive, bilateral ectopic canine maxilla and lateral ectopic canine mandibula, deep bite, anterior crowding and anterior crossbite. A fixed orthodontic treatment was performed by multiloop Begg technique with tooth extraction of 15, 25, 36, and 46. 9 months after treatment, anterior crossbite and ectopic 13, 23, 33 have been corrected by using multiloop Begg technique. Crowding in the lower arch has improved compared to initial condition and treatment still continues to this day. Multiloop Begg technique with second premolars extraction is an alternative treatment for ectopic canines correction if patient’s facial profile changes are not required.

scholarly journals Effect of Incisor Angulation on Overjet and Overbite in Class II Camouflage Treatment

2007 ◽  
Vol 77 (6) ◽  
pp. 1011-1018 ◽  
Author(s):  
Yasinee Sangcharearn ◽  
Christopher Ho
Keyword(s):  
Class Ii ◽  
Regression Coefficients ◽  
Lower Incisor ◽  
Skeletal Class ◽  
Premolar Extraction ◽  
Anterior Teeth ◽  
Skeletal Class Ii ◽  
Set Up ◽  
Extraction Treatment ◽  
Lower Incisors

Abstract Objectives: To determine the amount of variation in overjet and overbite that may result from changes in upper and lower incisor angulations following upper first premolar extraction treatment in Class II malocclusions. Materials and Methods: Typodonts were set up to simulate a skeletal Class II occlusion treated with upper first premolar extractions. The upper incisor angulation was altered through a range from 100° to 120° to the palatal plane by 2° increments. The overjet and overbite were measured with every 2° of upper incisor angulation change. A regression analysis was performed on the experimental data, and the regression coefficients, slope, and intercept were estimated. Results: Excessive proclination of the lower incisors will result in an abnormal overjet and overbite relationship for any magnitude of upper incisor angulation. A normal lower incisor angulation facilitates the attainment of an optimal occlusion. Excessive palatal root torque of the upper incisors will result in an increase in overjet and a consequent decrease in overbite. If the upper incisors are excessively retroclined, an edge-to-edge incisor relationship will result. Conclusion: Class II camouflage treatment with upper first premolar extractions requires correctly angulated incisors to achieve optimal buccal segment interdigitation and incisor relationship. Labial root torque and interproximal reduction of the lower anterior teeth should be considered when the lower incisors are excessively proclined.

scholarly journals Unusual Extraction Treatment in Class II division 1 Using C-Orthodontic Mini-Implants

2007 ◽  
Vol 77 (1) ◽  
pp. 155-166 ◽  
Author(s):  
Kyu-Rhim Chung ◽  
Jae-Hee Cho ◽  
Seong-Hun Kim ◽  
Yoon-Ah Kook ◽  
Mauro Cozzani
Keyword(s):  
Treatment Plan ◽  
Class Ii ◽  
Orthodontic Appliances ◽  
Posterior Teeth ◽  
Anterior Crowding ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Mandibular Molar ◽  
Division 1 ◽  
Class Ii Division 1

Abstract This paper describes the treatment of a female patient, aged 23 years and 5 months, with a Class II division 1 malocclusion, who showed severe anterior protrusion and lower anterior crowding. Specially-designed orthodontic mini-implants were placed bilaterally in the interdental space between both the upper and the lower posterior teeth. Both lower first molars showed severe apical lesions. Therefore, the treatment plan consisted of extraction of both upper first premolars and lower first molars, en masse retraction of the upper six anterior teeth, lower anterior alignment, and protraction of all the lower molars. C-implants® were used as substitutes for maxillary posterior anchorage teeth during anterior retraction and as hooks for mandibular molar protraction. The correct overbite and overjet were obtained by intruding and retracting the upper six anterior teeth into their proper positions. The dentition was detailed using conventional orthodontic appliances. The upper C-implants contributed to an improvement in facial balance, and the lower C-implants made it possible to protract the lower second and third molars with less effect on the axis of the lower anterior teeth. The active treatment period was 29 months and the patient's teeth continued to be stable 11 months after debonding.

scholarly journals “TRIPLET APPROACH”- COMBINATION OF ORTHOPEDIC, MYOFUNCTIONAL AND FIXED MECHANOTHERAPY

2020 ◽  
Vol 6 (1) ◽  
pp. 67-71
Author(s):  
Manish Goyal ◽  
Mukesh Kumar ◽  
Sumit Kumar ◽  
Shalini Mishra
Keyword(s):  
Phase I ◽  
Female Patient ◽  
Phase Ii ◽  
Clinical Examination ◽  
Treatment Time ◽  
Class Ii ◽  
Facial Profile ◽  
Nasolabial Angle ◽  
Total Treatment Time ◽  
Total Treatment

Abstract- A 13 year old female patient came to our department with chief complain of excessive gum show. On Clinical examination patient presented with convex facial profile, obtuse nasolabial angle, mesocephalic, mesoprosopic, incompetent lips and increased interlabial gap.  Intraorally she had class II canine and molar relation bilaterally with crowding irt 31, 32, 33, 41, 42, 43. Patient was really concerned about her facial profile. So we decided to manage the same with triplet approach i.e the combination of orthopedic, myofunctional and fixed mechanotherapy. The total treatment time was 28 months which include 13 month phase I therapy and 15 months phase II therapy and the results were exuberant.

scholarly journals Comprehensive approach to simultaneous molar intrusion and canine retraction in the treatment of Class II anterior open bite using miniscrew anchorage

2020 ◽  
Vol 25 (3) ◽  
Author(s):  
Kaori Shirasaki ◽  
Yoshihito Ishihara ◽  
Hiroki Komori ◽  
Takashi Yamashiro ◽  
Hiroshi Kamioka
Keyword(s):  
Treatment Duration ◽  
Class Ii ◽  
Open Bite ◽  
Prolonged Treatment ◽  
Anterior Open Bite ◽  
Posterior Teeth ◽  
Canine Retraction ◽  
Maxillary Molars ◽  
Anterior Teeth ◽  
Molar Intrusion

ABSTRACT Introduction: Anterior open bite is one of the most difficult malocclusions to correct in orthodontic treatment. Molar intrusion using miniscrew anchorage has been developed as a new strategy for open bite correction; however, this procedure still has an important concern about prolonged treatment duration in the patient with anteroposterior discrepancy due to the separate step-by-step movement of anterior and posterior teeth. Objective: This article illustrates a comprehensive orthodontic approach for dentoalveolar open bite correction of an adult patient, by using miniscrew. Case report: A woman 19 years and 5 months of age had chief complaints of difficulty chewing with the anterior teeth and maxillary incisor protrusion. An open bite of -2.0 mm caused by slight elongation of the maxillary molars was found. The patient was diagnosed with Angle Class II malocclusion with anterior open bite due to the vertical elongation of maxillary molars. After extraction of the maxillary first premolars, concurrent movements of molar intrusion and canine retraction were initiated with the combined use of sectional archwires, elastic chains and miniscrews. Results: At 4 months after the procedure, positive overbite was achieved subsequent to the intrusion of maxillary molars by 1.5 mm and without undesirable side effects. Class I canine relation was also achieved at the same time. The total active treatment period was 21 months. The resultant occlusion and satisfactory facial profile were maintained after 54 months of retention. Conclusion: The presented treatment shows the potential to shorten the treatment duration and to contribute to the long-term stability for open bite correction.

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 < .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 (<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 En Masse Retraction and Two-Step Retraction of Maxillary Anterior Teeth in Adult Class I Women

2007 ◽  
Vol 77 (6) ◽  
pp. 973-978 ◽  
Author(s):  
Wook Heo ◽  
Dong-Seok Nahm ◽  
Seung-Hak Baek
Keyword(s):  
Class I ◽  
Female Adult ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Lateral Cephalograms ◽  
Group 2 ◽  
Anchorage Loss ◽  
Root Apices ◽  
En Masse Retraction ◽  
Group 1

Abstract Objective: To compare the amount of anchorage loss of the maxillary posterior teeth and amount of retraction of the maxillary anterior teeth between en masse retraction and two-step retraction of the anterior teeth. Materials and Methods: The sample consisted of 30 female adult patients with Class I malocclusion and lip protrusion who needed maximum posterior anchorage. The sample was subdivided into group 1 (n = 15, mean age = 21.4 years, en masse retraction) and group 2 (n = 15, mean age = 24.6 years, two-step retraction). Lateral cephalograms were taken before (T1) and after treatment (T2). Nine skeletal and 10 anchorage variables were measured, and independent t-test was used for statistical analysis. Results: Although the amount of horizontal retraction of the maxillary anterior teeth was not different between the two groups, there was mild labial movement of the root apices of the upper incisors in group 2 at T2. There were no significant differences in the degree of anchorage loss of the maxillary posterior teeth between the two groups. Bodily and mesial movements of the upper molars occurred in both groups. Approximately 4 mm of the retraction of the upper incisal edges resulted from 1 mm of anchorage loss in the upper molars in both groups. Conclusion: No significant differences existed in the degree of anchorage loss of the upper posterior teeth and the amount of retraction of the upper anterior teeth associated with en masse retraction and two-step retraction of the anterior teeth.

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