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 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 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 The difference in the ratio of the maxillary anterior teeth mesiodistal to the golden proportion value after class I malocclusion treatment with Edgewise standard fixed appliance

2010 ◽  
Vol 22 (2) ◽  
Author(s):  
Agutina Suherman ◽  
Endah Mardiati ◽  
Tono Hambali ◽  
Bergman Thahar
Keyword(s):  
Orthodontic Treatment ◽  
T Test ◽  
Class I ◽  
Fixed Appliance ◽  
Golden Proportion ◽  
Premolar Extraction ◽  
Anterior Teeth ◽  
Study Population ◽  
The Difference ◽  
Descriptive Method

Introduction: The purpose of this study was to determine the difference in the ratio of maxillary anterior teeth as the results of Edgewise Standard fixed orthodontic treatment with and without extraction with golden proportion values. Methods: This study is using a retrospective analitist descriptive method. Sample divided at two groups of 13 patients with extraction of first premolar and 19 patients without first premolar extraction. The study population was patients who had completed the Edgewise Standard fixed orthodontic treatment at the Orthodontics Specialist Professional Program of the Faculty of Dentistry Universitas Padjadjaran at 2000-2009. The study was conducted using frontal intraoral photometry before and af-ter treatment with 3R photo size, then measured with electronic digital calliper software. Results: Evaluation is done by measuring the maxillary anterior teeth ratio using phimatrix software on frontal intra oral photometry of the post standard edgewise orthodontics patients with Class I malocclusion to the golden proportion, then proceed with statistical t-test. Conclusion: The conclusion of this study shows that the maxillary anterior teeth post standard edgewise orthodontic treatment in class I dento-skeletal patients with or without the first premolar extraction whose treated in orthodontic resident’s clinic Padjadjaran University shows a significant differences with the golden proportion.

scholarly journals THE USE OF MICRO-OSTEOPERFORATION CONCEPT FOR ACCELERATING DIFFERENTIAL TOOTH MOVEMENT

2021 ◽  
Vol 71 (3) ◽  
pp. 844-48
Author(s):  
Zoyia Ahsan ◽  
Mehwish Khan ◽  
Abdullah Jan ◽  
Tooba Ishtiaq Shah ◽  
Saad Naeem
Keyword(s):  
Tooth Movement ◽  
Armed Forces ◽  
Safe Procedure ◽  
Canine Retraction ◽  
Control Side ◽  
Quasi Experimental ◽  
Experimental Side ◽  
The Difference ◽  
The Right ◽  
And Control

Objective: To compare the rate of accelerated tooth movement in canine retraction with micro-osteoperforation on one side and control on the other. Study Design: Quasi experimental study. Place and Duration of Study: Orthodontics department, Armed Forces Institute of Dentistry, Rawalpindi Pakistan, from Jul 2018 to Jan 2019. Methodology: A total of 30 patients were inducted. After alignment and extraction of maxillary first premolars, canine retraction was started with closed NiTi coil spring on both sides of the maxillary arch. Micro-osteoperforation was done on the right side and other side was a control side. The distance between the lateral incisor and the canine was measured on both sides before micro-osteoperforation. The same measurements were recorded after three weeks of retraction. The difference between pre and post retraction measurements was recorded. The difference in the rate of canine retraction between both modalities was compared using independent sample t-test. Results: The study included 17 males (56%) and 13 females (43%). The mean rate of tooth movement at experimental side of maxilla was 1.6 ± 0.52 mm and on control side was 0.66 ± 0.31 mm (p<0.05). Conclusion: Micro-osteoperforation was an effective, comfortable, and safe procedure to accelerate tooth movement (1.6 times in accordance with this study). It significantly shorten the duration of orthodontic treatment.

scholarly journals Pulp volume changes after piezocision-assisted tooth movement: a randomized clinical trial

2021 ◽  
Author(s):  
Abdulkarim A. Hatrom ◽  
Mohammad S. Howait ◽  
Khalid H. Zawawi ◽  
Ghassan A. Al-Turki ◽  
Reem A. Alansari ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Root Length ◽  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Root Resorption ◽  
Volume Changes ◽  
Anterior Teeth ◽  
Length Changes ◽  
En Masse Retraction

Abstract Background Orthodontic treatment has some undesirable side effects, such as root resorption and a decrease in the size of the pulp tissue which are relatively associated with the duration of the orthodontic treatment. Piezocision-assisted tooth movement was introduced as a minimally invasive surgical procedure with an aim to shorten orthodontic treatment time. This prospective randomized clinical trial was aimed to compare the pulp volume changes of maxillary anterior teeth after en-masse retraction with or without piezocision-assisted orthodontics. Methods Patients who required orthodontic treatment with bilateral maxillary first premolar extractions and en-masse retraction were recruited. Patients were randomly divided into extraction with piezocision, or only extraction, serving as controls. Pulp volume and root length changes of the maxillary six anterior teeth were measured and compared between the two groups using a 3-Dimensional analytical software. Paired and independent sample t-tests were used to compare within and between groups. Bivariate correlation was done between the mean change in pulp volume and its corresponding root length. The significance level was set at α = 0.05. Results A total of 23 patients were included, 12 in the piezocision, and 11 in the control group. At the end of the en-masse retraction phase (mean = 122.74 ±3.06 days) pulp volume was significantly decreased in all six anterior teeth in both groups ( P < 0.01). The decrease in pulp volume was not statistically different between both groups, ( P > 0.05). There was a statistically significant but moderate correlation only between the pulp volume change of the right canine and its root length, r = 0.44, P = 0.034. Conclusions The effect of piezocision-assisted orthodontic tooth movement on the pulp volume was comparable to the conventional orthodontic treatment. The degree of change in pulp volume does not appear to be related to the amount of root resorption. Trial registration: NCT03180151.

scholarly journals Pulp volume changes after piezocision-assisted tooth movement: a randomized clinical trial

2020 ◽  
Author(s):  
Abdulkarim A. Hatrom ◽  
Mohamad S. Howait ◽  
Khalid H. Zawawi ◽  
Ghassan A. Al-Turki ◽  
Reem A. Alansari ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Root Length ◽  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Root Resorption ◽  
Volume Changes ◽  
Anterior Teeth ◽  
Length Changes ◽  
En Masse Retraction

Abstract Background: Orthodontic treatment may result in undesirable side effects, such as root resorption and a decrease in the size of the pulp tissue which could be associated with the duration of the orthodontic treatment. Piezocision-assisted tooth movement was introduced as a minimally invasive surgical procedure to shorten orthodontic treatment time. This prospective randomized clinical trial was aimed to compare the pulp volume changes of maxillary anterior teeth after en-masse retraction with or without piezocision-assisted orthodontics.Methods: Patients who required orthodontic treatment with bilateral maxillary first premolar extractions and en-masse retraction were recruited. Patients were randomly divided into extraction with piezocision, or only extraction, serving as controls. Pulp volume and root length changes of the maxillary six anterior teeth were measured and compared between the two groups using a 3-Dimensional analytical software. Paired and independent sample t-tests were used to compare within and between groups. Bivariate correlation was done between the mean change in pulp volume and its corresponding root length. The significance level was set at α = 0.05.Results: A total of 23 patients were included, 12 in the piezocision, and 11 in the control group. At the end of the en-masse retraction phase, (mean = 122.74 ±3.06 days) pulp volume was significantly decreased in all six anterior teeth in both groups (P < 0.01). The decrease in pulp volume was not statistically different between both groups, (P > 0.05). There was a statistically significant but moderate correlation only between the pulp volume change of the right canine and its root length, r = 0.44, P = 0.034.Conclusions: The effect of piezocision-assisted orthodontic tooth movement on the pulp volume was comparable to the conventional orthodontic treatment. The degree of change in pulp volume does not appear to be related to the amount of root resorption.Trial registration: NCT03180151. Registered December 25,2016, retrospectively registered, https://clinicaltrials.gov/ct2/show/record/NCT03180151

Clinical Application of Micro-Implant Anchorage in Initial Orthodontic Retraction

2015 ◽  
Vol 41 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Shaji Wahabuddin ◽  
Rohan Mascarenhas ◽  
Mahamad Iqbal ◽  
Akhter Husain
Keyword(s):  
Implant Stability ◽  
Orthodontic Anchorage ◽  
Anterior Teeth ◽  
Space Closure ◽  
The Stability ◽  
The Right ◽  
Micro Implants ◽  
Cephalometric Measurements ◽  
Implant Anchorage ◽  
Anchor Loss

Micro-implant is a device that is temporarily fixed to bone for the purpose of enhancing orthodontic anchorage either by supporting the teeth of the reactive unit or by obviating the need for the reactive unit altogether, and which is subsequently removed after use. The purpose of this study was to evaluate the clinical efficiency of micro-implants in reinforcing anchorage during the initial retraction of anterior teeth, check the rate of initial retraction for 8 weeks, and assess the stability of micro-implants during this period. Eighteen micro-implants were placed (10 in the maxilla and 8 in the mandible) and immediately loaded with 200–250 g of force using 9-mm closed coil Nitinol springs. The amount of space closure was measured every 2 weeks until the eighth week. Cephalometric measurements were made at the end of the study to evaluate anchor loss, if any. Micro-implant stability was also assessed. The rate of initial retraction in the maxilla at the end of 8 weeks was 1.65 mm/quadrant and 1.51 mm/quadrant in the mandible. The amount of retraction on the left side of the arches was 1.66 mm/quadrant and 1.49 mm/quadrant on the right side. The average initial retraction for both arches per month was 0.78 mm. An anchor loss of 0.1 mm (0.06%) was observed in the maxilla while no mandibular anchor loss was recorded. The rate of initial retraction observed in the maxilla was more than that achieved in the mandible. Initial retraction was also more on the left side of the arches. There was no anchor loss in the mandible. The micro-implant-reinforced anchorage was helpful in minimizing anchor loss and accepted heavy traction forces but did not bring about a faster rate of retraction.

scholarly journals Comparison of the rate of maxillary canine retraction with or without modified corticotomy facilitated orthodontic treatment

2021 ◽  
Vol 4 ◽  
pp. 8-13
Author(s):  
M. Kokila ◽  
Vinaya S. Pai ◽  
Siri Krishna ◽  
Gautham Kalladka ◽  
Shreyas Rajaram ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Contralateral Side ◽  
Maxillary Canine ◽  
Mean Velocity ◽  
Premolar Extraction ◽  
Canine Retraction ◽  
Effective Treatment Modality ◽  
Pre Treatment ◽  
Leveling And Alignment

Objectives: The aim of the study was to evaluate and compare the rate of maxillary canine retraction in cases with modified corticotomy versus without modified corticotomy. Clinical interventional study. Split mouth design was used. Materials and Methods: A sample size of ten patients and 20 sites were selected within the age group of 18–35 years following all criteria of the study. Before orthodontic leveling and alignment, upper first premolar extraction was carried out under local anesthesia. Pre-treatment OPG and IOPA were taken in relation to the maxillary canine and maxillary second premolar teeth. One extraction side was considered as the experimental site and contralateral side as control. Leveling and alignment were started with wire sequence. After modified corticotomy procedure, the canine retraction was started with 8 mm NiTi closed coil spring. The amount of tooth movement was recorded with the help of a Digital Vernier Caliper at an interval of 1 month till the completion of canine retraction. Results: Paired t-test showed higher mean velocity of tooth movement in modified corticotomy side (1.07 ± 0.25) as compared to the conventional side (0.91 ± 0.24), (P < 0.001). Conclusion: The modified corticotomy technique serves as an effective treatment modality for adults seeking orthodontic treatment with increased rate of orthodontic canine retraction.

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