Study of the velocity of upper canine retraction after alveolar corticotomy

The purpose of this study was to evaluate the efficacy of alveolar corticotomy on orthodontic tooth movement when retracting upper canines compared with the conventionnal treatment. The sample consisted of 30 patients with a mean age of 21 ± 2 years requiring the therapeutic extraction of the maxillary first premolars, with subsequent retraction of the maxillary canines. The subjects were divided into two groups, one receiving orthodontic treatment assisted corticotomy (experimental group) and the other conventional treatment (control group). The velocity of the retraction of the upper canine was evaluated by measuring the distance between the canine and second premolar on each side of the mouth for both groups at 2 months, and 4 months after canine retraction. Results: the velocity of canine was significantly higher on the experimental group than the control group by two times during the first two months after canine retraction. This rate declined to 1.25 times higher after four months. Conclusion: alveolar corticotomy increased orthodontic tooth movement when retracting upper canines.

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Effect of platelet-rich plasma on the rate of orthodontic tooth movement:

The Angle Orthodontist ◽

10.2319/072119-483.1 ◽

2020 ◽

Vol 90 (3) ◽

pp. 354-361 ◽

Cited By ~ 1

Author(s):

Ahmed El-Timamy ◽

Fouad El Sharaby ◽

Faten Eid ◽

Amr El Dakroury ◽

Yehya Mostafa ◽

...

Keyword(s):

Tooth Movement ◽

Platelet Rich Plasma ◽

Orthodontic Tooth Movement ◽

The Other ◽

Positive Potential ◽

Canine Retraction ◽

Steady Rate ◽

Significant Difference ◽

To Receive ◽

Retraction Force

ABSTRACT Objective To investigate the effect of local injection of platelet-rich plasma (PRP) on the rate of orthodontic tooth movement. Materials and Methods Sixteen female patients were randomly allocated in a split-mouth study design to receive PRP injections with CaCl2 activating solution on one side (intervention side) while the other side received CaCl2 injection only (control side). Canine retraction was performed on 0.017 × 0.025-inch stainless steel archwire applying 1.5 N retraction force. PRP and CaCl2 injections were done at 0, 3, and 6 weeks. The duration of the study was 4 months. Data were collected from digitized models. Assessment of pain accompanying the procedure was done using a visual analogue scale. Results The rate of canine retraction was faster on the intervention side in the first 2 months, with a statistically significant difference in the first month (P = .049). On the other hand, the rate was statistically significantly slower on the intervention side in the third month following cessation of PRP injections (P = .02). Pain increased following injections on both sides. Conclusions PRP showed a positive potential to accelerate the rate of tooth movement when injected in the first 2 months. Repeated injections of PRP to maintain a steady rate of accelerated tooth movement warrant further investigation.

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Comparison of Rate of Canine Retraction and Secondary Outcomes Associated With Conventional Fixed Orthodontic Treatment and Minimally Invasive Techniques (MOPs): A Randomized Control Trial

The Journal of Indian Orthodontic Society ◽

10.1177/0301574220963502 ◽

2020 ◽

pp. 030157422096350

Author(s):

Ajit Vikram Parihar ◽

Shivam Verma ◽

TP Chaturvedi ◽

Naresh Kumar ◽

A Kavin Prasanth ◽

...

Keyword(s):

Orthodontic Treatment ◽

Tooth Movement ◽

Root Resorption ◽

Control Group ◽

P Value ◽

Pain Level ◽

Canine Retraction ◽

Significant Difference ◽

Secondary Outcomes ◽

Anchorage Loss

Introduction: The objective of the study was to assess the rate of canine retraction and secondary outcomes associated with conventional fixed orthodontic treatment (CFO) and CFO with micro-osteoperforation (CFO + MOP), that is, anchorage loss, root resorption, vitality of tooth, pain and discomfort level during the procedure. Methods: A total of 16 patients with Class II Division 1 malocclusion who required upper first premolar extraction with lower non-extraction/single incisor extraction were divided into the test group (MOP) and positive control group (CFO + MOP) for a split-mouth study. Both maxillary canines were retracted with nickel–titanium (NiTi) closed coil springs. Patients were reviewed after 24 hours, 7 days, 28 days, and 4, 8, and 16 weeks to assess the rate of tooth movement, anchorage loss, root resorption, vitality of tooth, pain and discomfort level. Results: There was a statistically significant difference in the rate of tooth movement between the CFO and CFO + MOP groups after the first 4 weeks ( P-value = .026), whereas no statistically significant difference was observed at 8, 12, and 16 weeks ( P-value = .33, .99, and .08, respectively). In the CFO group, there was no statistically significant difference in tooth movement between different time intervals ( P-value > .05). There was no significant difference in root resorption between the groups. The pain level was higher in the MOP group in the first 24 hours ( P-value < .05) after the procedure. Later on, the difference in pain level between the groups was not significant ( P-value > .05). The vitality of retracted canines in both groups was healthy. Conclusion: The study recommends that the CFO + MOP procedure has substantial potential to be used as an adjunct to the routine mechanotherapy for faster tooth movement, as it may reduce the treatment time by half in the first 4 weeks after the MOP procedure. There are no potential differences in anchorage loss, tipping, vitality, and apical and lateral root resorption between the CFO and CFO + MOP groups. This trial was registered at Clinical Trial Registry, India.

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Ultrasonographic evaluation of periodontal changes during orthodontic tooth movement - work in progress

Medicine and Pharmacy Reports ◽

10.15386/cjmed-663 ◽

2017 ◽

Vol 90 (1) ◽

pp. 93-98

Author(s):

Adela Zimbran ◽

Diana Dudea ◽

Cristina Gasparik ◽

Sorin Dudea

Keyword(s):

Orthodontic Treatment ◽

Tooth Movement ◽

Orthodontic Tooth Movement ◽

Correlation Coefficients ◽

Strongly Correlated ◽

Bone Apposition ◽

Periodontal Tissues ◽

Canine Retraction ◽

High Resolution Ultrasonography

Background and aim. Orthodontic tooth movement (OTM) is a process whereby the application of a force induces bone resorption on the pressure side and bone apposition on the tension side of the lamina dura. However, only limited data are available on the in vivo behavior of the periodontal tissues. The aim of this study was to assess the changes of periodontal tissues, induced by the orthodontic canine retraction, using 40 MHz ultrasonography.Methods. Ultrasonographic evaluation of periodontal tissues was conducted in 5 patients with indication for orthodontic treatment. The upper first premolars were extracted bilaterally due to severe crowding, and the canines were distalized using elastomeric chain with a net force of 100 cN. Ultrasonographic scans (US scans) were performed before, during and after retraction, in three distinct areas of the canines buccal surface: mesial, middle and distal. The reference point was the bracket, which appeared hyperechoic on the US scan. Four different dimensions were obtained: D1 (depth of the sulcus), D2 (thickness of the gingiva), D3 (length of the supracrestal fibers), D4 (width of periodontal space).Results. An increase of D1 was observed in all three areas of the periodontium, during orthodontic treatment. D3 was strongly correlated before and immediately after force delivery only for the mesial area (r=0.828, p<0.05). In total, 228 variables were statistically analyzed using Pearson’s correlation coefficients, in order to demonstrate the relationship between periodontal findings during orthodontic tooth movement.Conclusions. High-resolution ultrasonography has the capability to obviate changes in periodontal ligament space and free gingiva during orthodontic tooth movement.

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Comparison of rate of maxillary canine movement with or without modified corticotomy facilitated orthodontic treatment: A prospective clinical trial

APOS Trends in Orthodontics ◽

10.4103/2321-1407.159410 ◽

2015 ◽

Vol 5 ◽

pp. 138-143 ◽

Cited By ~ 3

Author(s):

Harshal N. Suryavanshi ◽

Vaishali R. Das ◽

Aashish Deshmukh ◽

Raj Rai ◽

Mena Vora

Keyword(s):

Orthodontic Treatment ◽

Tooth Movement ◽

Root Resorption ◽

Treatment Time ◽

Orthodontic Tooth Movement ◽

Radiographic Examination ◽

Maxillary Canine ◽

Mean Velocity ◽

Canine Retraction ◽

Extraction Therapy

Background and Objectives The average orthodontic treatment time for extraction therapy is 31 months. One of the main disadvantages of orthodontic treatment is time. Alveolar corticotomies have been used in conjunction with orthodontics to reduce the treatment time by increasing the rate of tooth movement. Concerns about the possible risks of corticotomy procedure have led to the modification of this technique. Germeç et al. reported a case treated by their modified corticotomy technique and noted reduced treatment time without any adverse effects on the periodontium and the vitality of teeth with their new conservative corticotomy technique. This study was undertaken to clinically evaluate the efficacy of the aforesaid technique. Materials and Methods A split-mouth study design was carried out to compare the rate of maxillary canine movement with and without modified corticotomy facilitated orthodontic treatment in 10 patients requiring maxillary first premolar extractions. The modified corticotomy procedure was performed on the maxillary arch unilaterally. The upper arch was immediately activated bilaterally after surgical procedure using equal orthodontic forces for retraction of the maxillary canines. The amount of tooth movement was recorded at an interval of every month till the completion of canine retraction. The rate of canine movement on experimental and control site was compared. The patients were followed for 6 months to check the occurrence of undesired effects such as root resorption, periodontal damage and loss of vitality of teeth on the experimental side. Results Higher mean velocity was observed in canines with modified corticotomy facilitated retraction compared to conventionally retracted canines; with the difference in mean velocity between the two groups was found to be clinically significant as well as statistically significant (P < 0.001). Interpretation and Conclusion The results suggested that modified corticotomy technique serves as an effective and safe way to accelerate orthodontic tooth movement, without adversely affecting the periodontium, root resorption, and the vitality of the teeth, as concluded by clinical and radiographic examination.

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Effect of Methotrexate Injection on Orthodontic Tooth Movement: An Experimental Study on Rats

International Journal of Dentistry ◽

10.1155/2021/8451522 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Amin Golshah ◽

Khaled Omidi ◽

Nafiseh Nikkerdar ◽

Hedaiat Moradpoor ◽

Fatemeh Ghorbani

Keyword(s):

Blood Vessels ◽

Orthodontic Treatment ◽

Tooth Movement ◽

Root Resorption ◽

Orthodontic Tooth Movement ◽

Volume Ratio ◽

Negative Control Group ◽

Negative Control ◽

Bone Volume ◽

Control Group

Introduction. Knowledge about the effects of medications, vitamins, and various supplements on orthodontic tooth movement (OTM) is imperative for orthodontists. This study aimed to assess the effect of methotrexate (MTX) injection on OTM in rats. Materials and Methods. Twenty-eight male Wistar rats were randomized into four groups (n = 7). The first molar and central incisor were connected using a nickel-titanium (NiTi) coil spring with a 50 g load in each rat. The two experimental groups received 0.75 mg/kg and 1.5 mg/kg MTX, respectively, intraperitoneally for 21 days. The negative control group did not receive any injection and did not undergo orthodontic treatment. The positive control group underwent orthodontic treatment and received 0.9% saline (NaCl) injections for 21 days. All rats were sacrificed with chloroform inhalation after 21 days; their maxilla was resected, and the mean number of Howship’s lacunae, blood vessels, osteoclasts, and resorption lacunae was counted. The reduction in bone volume (bone volume to total volume ratio (BV/TV)) at the site of the maxillary molar was quantified by microcomputed tomography (micro-CT). Results. OTM, the number of osteoclasts, and the number of blood vessels significantly increased in rats treated with MTX ( P < 0.05 ). However, the increase in the number of Howship’s lacunae and resorption lacunae was not significant ( P > 0.05 ). Lower BV/TV in the MTX groups was in agreement with the increased number of osteoclasts. Conclusion. Injection of MTX can significantly increase OTM and decrease root resorption in rats.

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Effect of micro-osteoperforation on the rate of orthodontic tooth movement—a systematic review and a meta-analysis

European Journal of Orthodontics ◽

10.1093/ejo/cjz049 ◽

2019 ◽

Vol 42 (2) ◽

pp. 211-221 ◽

Cited By ~ 4

Author(s):

Mostafa Shahabee ◽

Hooman Shafaee ◽

Mostafa Abtahi ◽

Abdolrasoul Rangrazi ◽

Erfan Bardideh

Keyword(s):

Systematic Review ◽

Adverse Effects ◽

Orthodontic Treatment ◽

Randomized Clinical Trials ◽

Tooth Movement ◽

Root Resorption ◽

Meta Analysis ◽

Orthodontic Tooth Movement ◽

Mean Difference ◽

Canine Retraction

Abstract Background The micro-osteoperforation can be used to increase the rate of tooth movement, simplify complex orthodontic movements, and also help adjust the anchorage but there are conflicting reports on the effectiveness and adverse effects of this intervention. Objectives The aim of our systematic review and meta-analysis was to evaluate the effects of micro-osteoperforation on the rate of tooth movement in patients undergoing orthodontic treatment. Search methods A comprehensive search of MEDLINE, ISI web of science, EMBASE, Scopus, and CENTRAL online databases for studies measuring the effects of micro-osteoperforation on the rate of orthodontic tooth movement from inception to February 2019 was performed. Selection criteria Based on the PICO model, human studies which evaluated the effects of MOP on the rate of tooth movement in patients undergoing orthodontic treatment were selected for this review. Data collection and analysis The relevant data from the eligible studies were extracted using piloted custom extraction forms. The data were combined and analysed using inverse-variance random-effect meta-analysis and the mean difference was used for comparing the outcome measures. Results Six randomized clinical trials were finally included in this meta-analysis. The rate of canine retraction per month was significantly higher in the MOP group [mean difference (MD) = 0.45 mm, 95% CI = 0.17–0.74]. These results were similar with regard to different malocclusions, the jaw on which it was performed, and MOP methods. The patients did not report any significant differences in terms of pain severity levels after MOP. With regard to the adverse effects, one study reported higher amounts of root resorption among patients undergoing MOP. Conclusions The rate of tooth movement was increased after performing MOP but in at least one study higher root resorption was observed. Therefore, the use of MOP can be recommended after weighing the benefits and disadvantages this intervention can bring for each patient. Registration The protocol for this review was registered via crd.york.ac.uk/prospero with the ID CRD42019115499.

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Effects of Gradually Increasing Force Generated by Permanent Rare Earth Magnets for Orthodontic Tooth Movement

The Angle Orthodontist ◽

10.2319/071805-237 ◽

2006 ◽

Vol 76 (6) ◽

pp. 1004-1009 ◽

Cited By ~ 8

Author(s):

Ryo Tomizuka ◽

Hiroyasu Kanetaka ◽

Yoshinaka Shimizu ◽

Akihiro Suzuki ◽

Kaoru Igarashi ◽

...

Keyword(s):

Rare Earth ◽

Tooth Movement ◽

Root Resorption ◽

Orthodontic Tooth Movement ◽

Male Rats ◽

Control Group ◽

Pathological Changes ◽

Group I ◽

Group Ii ◽

Experimental Group

Abstract Objective: To examine the effects of gradually increasing force generated by permanent rare earth magnets for orthodontic tooth movement by using a novel experimental rat model and computer simulation. Materials and Methods: Fifty-five male rats (age 18 weeks) were used as animal experiments. Magnetic (experimental groups) or titanium (control group) cuboids (1.5 × 1.5 × 0.7 mm) were bonded to the lingual surface of the maxillary first molars. The initial distance between materials was 1.0 mm, generating 4.96 gf (experimental group I), or 1.5 mm, generating 2.26 gf (experimental group II). Tooth movement was measured and periodontal structures were observed with microfocus x-ray computed tomography radiographs. Results: The distance between the magnets decreased with time in experimental groups I and II (P < .001), whereas there was no tooth displacement in the control group. Experimental group I showed rapid tooth movement in the initial phase followed by slower tooth movement. Experimental group II showed gradual tooth movement. Horizontal sections on microfocus computed tomgraphy radiographs revealed no pathological changes, such as root resorption, on the compressed side in the experimental groups. Conclusions: The initial light force and gradual increasing force in magnetic attractive force induced effective tooth movement in rats without inducing any pathological changes.

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Effects of Achievement Motivation Training on Academic Performance of Underachievers

Psychological Reports ◽

10.2466/pr0.1980.47.2.567 ◽

1980 ◽

Vol 47 (2) ◽

pp. 567-574 ◽

Cited By ~ 3

Author(s):

Allan Markle ◽

Roger C. Rinn ◽

Brenda Goodwin

Keyword(s):

Academic Performance ◽

Training Program ◽

Achievement Motivation ◽

Treated Group ◽

The Other ◽

Control Group ◽

Present Program ◽

Treatment Control ◽

Treatment Control Group

In an attempt to help underachieving students improve academic performance, an Achievement Motivation Training program was developed. Although similar to other programs focusing on achievement motivation, substantial differences exist, particularly since the present program is presented in an outpatient format rather than integrated into the classroom. 54 students (Grades 3 to 11), referred by their counselors, were subjects; half of these completed our Achievement Motivation Training program, the other half served as a no-treatment control group. The treated group showed a significant improvement in grades from before training to follow-up as well as significantly greater improvement than the control group. Also, a new methodology was offered and tested, demonstrating that a no-treatment group may not be necessary when grades are the primary dependent variable.

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The Role of Low-Intensity Biostimulation Laser Therapy in Transforming Growth Factor β1, Bone Alkaline Phosphatase and Osteocalcin Expression during Orthodontic Tooth Movement in Cavia porcellus

European Journal of Dentistry ◽

10.1055/s-0039-1688655 ◽

2019 ◽

Vol 13 (01) ◽

pp. 102-107 ◽

Cited By ~ 1

Author(s):

Ida Bagus Narmada ◽

Muhammad Rubianto ◽

Suhartono Taat Putra

Keyword(s):

Orthodontic Treatment ◽

Transforming Growth Factor ◽

Tooth Movement ◽

Orthodontic Tooth Movement ◽

Transforming Growth Factor Β1 ◽

Bone Alkaline Phosphatase ◽

Control Group ◽

Cavia Porcellus ◽

Low Intensity ◽

Tgf Β1

Abstract Objective The aim of this study is to analyze the low-intensity laser therapy (LILT) biostimulation mechanism as adjuvant therapy within orthodontic treatment as a means of accelerating bone remodeling by transforming growth factor β1 (TGF-β1), bone alkaline phosphatase (BALP), and osteocalcin (OSC) expression. Materials and Methods An analytical experimental method incorporating a posttest only randomized the control group design. The sample consisted of 24 3- to 4-month-old male Cavia porcellus weighing between 300 and 500 g divided into three groups (group 1: control, group 2: received orthodontic treatment, and group 3: received orthodontic treatment with irradiation LILT). LILT biostimulation at a dose of 4 joule/cm2 was performed daily for 3 min on the mesial-distal labial-palatal of the first dextra and sinistra incisor for 2 weeks. The TGF-β1, BALP, and OSC expression was subjected to immunohistochemical analysis. An analysis of variance with multiple comparison, a Tukey's honestly significant difference test, a Kruskal–Wallis test, and a Wilcoxon–Mann–Whitney test were all performed (p < 0.05). Results TGF-β1 expression was significantly different (p = 0.047; p < 0.05) in the tension area, but not in the compression side (p = 0.154; p > 0.05). BALP expression was significantly different in both the tension (p = 0.009) and compression areas (p = 0.005; p < 0.05). OSC expression was significantly different (p = 0.034; p < 0.05) in the tension side, but not in the compression area (p = 1.194; p > 0.05). Conclusion LILT biostimulation can increase TGF-β1, BALP, and OSC expression during orthodontic tooth movement.

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Osteoprotegerin Level Differences in Orthodontic Treatment with Self-ligating and Conventional Preadjusted Brackets at Early Aligning and Leveling Phase

World Journal of Dentistry ◽

10.5005/jp-journals-10015-1497 ◽

2018 ◽

Vol 9 (1) ◽

pp. 2-7

Author(s):

Retno Widayati ◽

Muhammad SK Adiwirya ◽

Nurtami Soedarsono

Keyword(s):

Orthodontic Treatment ◽

Tooth Movement ◽

Gingival Crevicular Fluid ◽

Contralateral Side ◽

The Self ◽

Control Group ◽

Dependent Manner ◽

Irregularity Index ◽

Anterior Teeth ◽

Experimental Group

ABSTRACT Aim This study aims to investigate the differences in osteoprotegerin (OPG) concentrations in early aligning and leveling of orthodontic treatments using self-ligating and conventional preadjusted brackets. Materials and methods Three groups consisting of two experimental groups and one control group participated in this study. A total of 18 patients were selected according to the following inclusion criteria: Little's irregularity index on maxillary anterior teeth ranging from 4 to 9 mm, nonextraction orthodontic treatment on the experimental group, and no previous orthodontic treatment. The experimental group received orthodontic treatment with either a passive self-ligating or conventional preadjusted bracket system, while the control group did not receive orthodontic treatment. Gingival crevicular fluid (GCF) collection was done at baseline, 1, 24, and 168 hours on five points of maxillary anterior proximal sites, from the mesiolabial side of the canine to the mesiolabial side of its contralateral side. The OPG concentration was assessed by enzyme-linked immunoabsorbent assay (ELISA). Results The OPG concentration on both bracket systems was decreased in a time-dependent manner. Decreasing concentration was maintained up until 168 hours on the self-ligating bracket, while conventional preadjusted bracket showed significantly increasing concentration at 168 hours (p = 0.004). Levels of OPG were significantly lower on self-ligating bracket compared with the conventional bracket at 1, 24, and 168 hours (p < 0.005). Conclusion Both bracket systems showed decreasing OPG concentration up to 24 hours after orthodontic activation. A maintained decreasing level of OPG was observed on the self-ligating bracket group at 168 hours, and it showed significant lower OPG concentration compared with the conventional preadjusted bracket group at 1, 24, and 168 hours after initial force application. Clinical significance The maintained decreasing level of OPG could indicate bone resorption that allows tooth movement into correct alignment that still occurs on self-ligating bracket up to 168 hours after initial activation. How to cite this article Widayati R, Adiwirya MSK, Soedarsono N. Osteoprotegerin Level Differences in Orthodontic Treatment with Self-ligating and Conventional Preadjusted Brackets at Early Aligning and Leveling Phase. World J Dent 2018;9(1):2-7.

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