scholarly journals Effects of insertion angle and implant thread type on the fracture properties of orthodontic mini-implants during insertion

2012 ◽  
Vol 83 (4) ◽  
pp. 698-704 ◽  
Author(s):  
Il-Sik Cho ◽  
Tae-Woo Kim ◽  
Sug-Joon Ahn ◽  
Il-Hyung Yang ◽  
Seung-Hak Baek
Keyword(s):  
Periodontal Ligament ◽  
Insertion Torque ◽  
Peak Time ◽  
Human Tissues ◽  
Fracture Properties ◽  
Insertion Angle ◽  
Single Thread ◽  
Mini Implants ◽  
Artificial Materials ◽  
Critical Contact

ABSTRACT Objective: To determine the effects of insertion angle (IA) and thread type on the fracture properties of orthodontic mini-implants (OMIs) during insertion. Materials and Methods: A total of 100 OMIs (self-drilling cylindrical; 11 mm in length) were allocated into 10 groups according to thread type (dual or single) and IA (0°, 8°, 13°, 18°, and 23°) (n  =  10 per group). The OMIs were placed into artificial materials simulating human tissues: two-layer bone blocks (Sawbones), root (polymethylmethacrylate stick), and periodontal ligament (Imprint-II Garant light-body). Maximum insertion torque (MIT), total insertion energy (TIE), and peak time (PT) were measured and analyzed statistically. Results: There were significant differences in MIT, TIE, and PT among the different IAs and threads (all P < .001). When IA increased, MIT increased in both thread groups. However, TIE and PT did not show significant differences among 0°, 8°, and 13° IAs in the dual-thread group or 8°, 13°, and 18° IAs in the single-thread group. The dual-thread groups showed higher MIT at all IAs, higher TIE at 0° and 23° IAs, and longer PT at a 23° IA than the single-thread groups. In the 0°, 8°, and 13° IA groups, none of the OMIs fractured or became deformed. However, in the 18° IA group, all the OMIs were fractured or deformed. Dual-thread OMIs showed more fracturing than deformation compared to single-thread OMIs (P < .01). In the 23° IA group, all OMIs penetrated the artificial root without fracturing and deformation. Conclusions: When OMIs contact artificial root at a critical contact angle, the deformation or fracture of OMIs can occur at lower MIT values than those of penetration.

scholarly journals Insertion Angle Impact on Primary Stability of Orthodontic Mini-Implants

2008 ◽  
Vol 78 (6) ◽  
pp. 1065-1070 ◽  
Author(s):  
Benedict Wilmes ◽  
Yu-Yu Su ◽  
Dieter Drescher
Keyword(s):  
Bone Quality ◽  
Primary Stability ◽  
Insertion Torque ◽  
Insertion Angle ◽  
Oblique Direction ◽  
Mini Implants ◽  
Local Bone ◽  
Torque Values ◽  
The Impact ◽  
Root Contact

Abstract Objective: To analyze the impact of the insertion angle on the primary stability of mini-implants. Materials and Methods: A total of 28 ilium bone segments of pigs were embedded in resin. Two different mini-implant sizes (Dual-Top Screw 1.6 × 8 mm and 2.0 × 10 mm) were inserted at seven different angles (30°, 40°, 50°, 60°, 70°, 80°, and 90°). The insertion torque was recorded to assess primary stability. In each bone, five Dual-Top Screws were used to compensate for differences in local bone quality. Results: The angle of mini-implant insertion had a significant impact on primary stability. The highest insertion torque values were measured at angles between 60° and 70° (63.8° for Dual-Top 1.6 mm and 66.7° for Dual-Top 2.0 mm). Very oblique insertion angles (30°) resulted in reduced primary stability. Conclusions: To achieve the best primary stability, an insertion angle ranging from 60° to 70° is advisable. If the available space between two adjacent roots is small, a more oblique direction of insertion seems to be favorable to minimize the risk of root contact.

scholarly journals Effects of wobbling angle on the stability measures of orthodontic mini-implants during insertion and removal procedures

2013 ◽  
Vol 83 (6) ◽  
pp. 1009-1014 ◽  
Author(s):  
Il-Sik Cho ◽  
Sang-Ho Baek ◽  
Young Ho Kim
Keyword(s):  
Insertion Torque ◽  
Peak Time ◽  
Cylindrical Shape ◽  
Artificial Bone ◽  
Removal Torque ◽  
Mini Implants ◽  
Significant Difference ◽  
The Stability ◽  
Driving Torque ◽  
Maximum Removal

ABSTRACT Objective: To investigate the effects of wobbling angle on the stability measures of orthodontic mini-implants (OMIs) during insertion and removal procedures in artificial bone blocks. Materials and Methods: A total of 36 OMIs (self-drilling type, cylindrical shape, 7 mm in length, 1.45 mm in diameter) were allocated into three groups according to the amount of wobbling angle (W-0°, W-2°, and W-4° groups; N = 12 per group). The OMIs were installed and subsequently removed from artificial bone blocks (Sawbone) using a driving torque tester with a uniform speed of 28 rpm. Insertion peak time (IPT), maximum insertion torque (MIT), total insertion energy (TIE), near-peak insertion energy (NPIE), maximum removal torque (MRT), and near-peak removal energy (NPRE) were measured. Results: The W-4° group showed the longest IPT and highest TIE and NPIE, followed by the W-2° and W-0° groups (W-0° < W-2° < W-4°, all P < .001). The W-2° and W-4° groups showed significant increase in MIT compared with the W-0° group (W-0° < [W-4°,W-2°]; P < .001). Although there was no significant difference in NPRE among the three groups, the W-4° group showed a decrease in MRT compared with the W-0° and W-2° groups (W-4° < {W-2°,W-0°]; P < .05). Although the W-4° group showed a 14.5% (2.9 Ncm) increase in MIT compared with the W-0° group, there was only a 6% (1.3 Ncm) decrease in MRT from the W-0° group to the W-4° group. Conclusion: Slight wobbling during the OMI insertion procedure may be acceptable in terms of the stability measures of OMIs during insertion and removal procedures.

scholarly journals Geometrical design characteristics of orthodontic mini-implants predicting maximum insertion torque

2014 ◽  
Vol 44 (4) ◽  
pp. 177 ◽  
Author(s):  
Višnja Katić ◽  
Ervin Kamenar ◽  
David Blažević ◽  
Stjepan Špalj
Keyword(s):  
Insertion Torque ◽  
Geometrical Design ◽  
Mini Implants ◽  
Design Characteristics

Is there an ideal insertion angle and position for orthodontic mini-implants in the anterior palate? A CBCT study in humans

2019 ◽  
Vol 156 (3) ◽  
pp. 345-354 ◽  
Author(s):  
Kathrin Becker ◽  
Justine Unland ◽  
Benedict Wilmes ◽  
Nour Eldin Tarraf ◽  
Dieter Drescher
Keyword(s):  
Insertion Angle ◽  
Mini Implants

Insertion torque values and success rates for paramedian insertion of orthodontic mini-implants

2018 ◽  
Vol 79 (2) ◽  
pp. 109-115 ◽  
Author(s):  
Bruno Di Leonardo ◽  
Björn Ludwig ◽  
Jörg Alexander Lisson ◽  
Luca Contardo ◽  
Rossano Mura ◽  
...  
Keyword(s):  
Insertion Torque ◽  
Success Rates ◽  
Mini Implants ◽  
Torque Values

scholarly journals An in vitro investigation of peak insertion torque values of six commercially available mini-implants

2010 ◽  
Vol 33 (6) ◽  
pp. 660-666 ◽  
Author(s):  
C. Z. Y. Whang ◽  
D. Bister ◽  
M. Sherriff
Keyword(s):  
Insertion Torque ◽  
Mini Implants ◽  
In Vitro Investigation ◽  
Torque Values

Insertion torque and success of orthodontic mini-implants: A systematic review

2012 ◽  
Vol 142 (5) ◽  
pp. 596-614.e5 ◽  
Author(s):  
Reint A. Meursinge Reynders ◽  
Laura Ronchi ◽  
Luisa Ladu ◽  
Faridi van Etten-Jamaludin ◽  
Shandra Bipat
Keyword(s):  
Systematic Review ◽  
Insertion Torque ◽  
Mini Implants

scholarly journals Cortical Piezo-Puncture as a Minimally Invasive Method for Reducing MiniScrew Implant Insertion Torque: A Preliminary in vitro Study

2018 ◽  
Vol 8 ◽  
pp. 124-130
Author(s):  
Juan Pablo Gomez ◽  
Lisbetd Giraldo ◽  
Daniela Montoya ◽  
Miguel Urrea
Keyword(s):  
In Vitro Study ◽  
Control Group ◽  
Insertion Torque ◽  
Miniscrew Implants ◽  
Mini Implants ◽  
Intact Bone ◽  
Invasive Method ◽  
Miniscrew Implant ◽  
Experimental Group

Objective The objective of this study was to determine the effect of cortical piezo-puncture (CPP) on maximum insertion torque (MIT), maximum removal torque (MRT), and maximum axial load (MAL) during the insertion of self-drilling miniscrew implants (MSI), in an experimental model with proximal epiphysis of bovine tibia. Materials and Methods A comparative study was conducted using two groups of 20 self-drilling MSI inserted in intact bone (control group) and in bone with previous CPP (experimental group). MIT, MRT, and MAL of the 20 mini implants of each group were measured. Using SPSS software, Student’s t-test was applied to compare MIT and MRT and the U-test Mann–Whitney test was applied to compare MAL in both groups as well as Pearson and Spearman correlation. Results In the experimental group, average values of 12.85 (±4,32) Newton x centimeters (Ncm), 13.7 (±4,54) Ncm, and 22,474 (±895,95) gF for MIT, MRT, and MAL were found, respectively. In the control group, average values found for MIT, MRT, and MAL were 20.2 (±4,7) Ncm, 22.3 (±5,17) Ncm, and 4688,7 (±320,18) gF, respectively. Statistically significant differences were observed in MIT, MRT, and MAL between control and experimental groups (P < 0,001). Conclusions CPP before insertion of orthodontic MSI in bovine tibia significantly reduces MIT, MRT, and MAL.

Evaluation of Insertion Torque and Initial Stability of Single Thread Implants versus Double and Triple Thread Implants: An Animal Study

2021 ◽  
Vol 67 (3) ◽  
pp. 1995-2006
Author(s):  
Ayman Serag Eldeen ◽  
Hamdy Hamed ◽  
Hesham Fattouh ◽  
Mohammed Abdel Rasoul
Keyword(s):  
Animal Study ◽  
Insertion Torque ◽  
Single Thread ◽  
Initial Stability

scholarly journals Effect of vertical placement angle on the insertion torque of mini-implants in human alveolar bone

2016 ◽  
Vol 21 (5) ◽  
pp. 47-52 ◽  
Author(s):  
Rafael Ribeiro Maya ◽  
◽  
Célia Regina Maio Pinzan-Vercelino ◽  
Julio de Araujo Gurgel ◽  
Keyword(s):  
Alveolar Bone ◽  
Ex Vivo ◽  
Primary Stability ◽  
Insertion Torque ◽  
Significance Level ◽  
Mini Implants ◽  
Implant Placement ◽  
Human Cadavers ◽  
Ex Vivo Study ◽  
Posterior Area

ABSTRACT Objective: The aim of the present ex-vivo study was to evaluate the effect of the vertical placement angle of mini-implants on primary stability by analyzing maximum insertion torque (MIT). Methods: Mini-implants were placed in 30 human cadavers, inserted at either a 90° or 60° angle to the buccal surface of the maxillary first molar. Out of 60 self-drilling mini-implants used, half were of the cylindrical type and half were of the conical type. Primary stability was assessed by means of measuring the MIT. Data were subjected to analysis of variance (ANOVA) and Newman-Keuls tests. A significance level of 5% was adopted. Results: The MIT was higher for both mini-implant types when they were placed at a 90° angle (17.27 and 14.40 Ncm) compared with those placed at a 60° angle (14.13 and 11.40 Ncm). Conclusions: MIT values were differed according to the vertical mini-implant placement angle in the maxillary posterior area. Regardless of the type of mini-implant used, placement at a 90° angle resulted in a higher MIT.

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