A comparative study of different intrusion methods and their effect on maxillary incisors

Goel, Prachi; Tandon, Ragni; Agrawal, Kaushal Kishor

doi:10.1016/j.jobcr.2014.11.007

Cited by 12 publications

(10 citation statements)

References 16 publications

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“…Our results showed that overall root resorption was 2.15 ± 0.85 mm with no statistically significant differences between the two groups. Other studies of incisor intrusion have obtained lower root resorption values when using miniscrews [7,19,31] or conventional intrusion archwires [14,32,33]. These differences may be due to the amount of intrusion produced, as there is a positive correlation between intrusion and resorption rates, as the present study demonstrates, the amount of intrusion found in the present study being higher than amounts reported in other studies (3.84 ± 2.96 mm).…”

Section: Discussioncontrasting

confidence: 64%

One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study

et al. 2020

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Background: Miniscrews are effective devices for performing upper incisor intrusion. Different mechanics can be applied depending on the treatment objectives. This study aimed to evaluate the efficacy of one or two anterior miniscrews for upper incisor correction in cases of overbite and angulation in adult patients. Methods: Forty-four adults with deep overbite were divided into two groups: group 1 was treated with one miniscrew between upper central incisors and group 2 with two miniscrews between upper lateral incisors and canines. Incisor intrusion and length were measured from lateral cephalograms before treatment, after treatment and at least 12 months into retention (T0, T1 and T2). Forces were applied (90 g) from the miniscrews to the archwire using elastomeric chains. ANOVA analysis was used to determine whether differences between evaluation times were statistically significant. Results: Mean root resorption was 2.15 ± 0.85 mm, which ceased after active treatment. Overbite mean correction was − 3.23 ± 1.73 mm with no statistically significant relapse. Overbite correction and incisor intrusion were significantly greater in group 2 (− 3.80 ± 1.43 versus − 2.75 ± 1.63 for OB and 8.19 ± 3.66 versus 5.69 ± 2.66 for intrusion). Resorption and overbite correction were positively related. No counterclockwise rotation of the mandibular plane was observed. Conclusions: Overbite correction can be performed by means of upper incisor intrusion without rotation of the mandibular plane. Correction of upper incisor intrusion and overbite is greater in patients treated with two miniscrews. The increase in upper incisor buccal angulation is greater with one miniscrew. Root resorption is positively related to the extent of intrusion. Stability is satisfactory regardless of whether one or two miniscrews are used.

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Section: Discussioncontrasting

confidence: 64%

One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study

et al. 2020

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“…In previous studies of root resorption occurring during maxillary incisor intrusion obtained with conventional methods and screened with periapical X-rays, resorption varied between 0.6 mm and 2.5 mm. [16][17][18][19][20] Using utility arches, McFadden et al 18 found 0.84 mm of intrusion but 1.84 mm of resorption after termination of treatment (28.8 6 7.4 months); Goel et al 19 observed 1.56 mm of root shortening for 1.60 mm of intrusion during a 4.32-month period. Using a Burstone intrusion arch, Costopoulos and Nanda 16 observed 0.6 mm of resorption after 1.9 mm of apical movement of C R over 4.6 months with intrusive forces of 15 g per teeth.…”

Section: Anterior Vs Posterior Mini-implant-assisted Incisor Intrusionmentioning

confidence: 99%

Comparison of anterior and posterior mini-implant-assisted maxillary incisor intrusion: Root resorption and treatment efficiency

Aras

Tuncer

2016

The Angle Orthodontist

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Objective: To compare, through cone-beam computed tomography (CBCT), the root resorption and treatment efficiency of two different mini-implant-assisted modalities in intruding the maxillary incisors. Materials and Methods: Thirty-two adults who had deep bite and elongated maxillary incisors were randomly allocated to two groups: anterior mini-implant group (AMG) and posterior miniimplant group (PMG). In the AMG, approximately 40 g of force was applied per side with elastic chains from mini-implants placed between the lateral incisors and canines and in the PMG, with beta-titanium wires from mini-implants placed between the second premolars and first molars. This study was conducted on CBCT scans taken before intrusion and after 4 months of intrusion. Data were analyzed by means of a paired t-test, independent t-test, and Pearson's correlation test. Results: One patient was excluded from the AMG due to mini-implant loosening. While the incisors showed a significant reduction in length and volume, this amount was greater in the AMG, especially in the central incisors (P , .05). Together with the mean intrusion rates of 0.62 and 0.39 mm/mo in the AMG and PMG respectively, the center of resistance of the incisors showed distal movement with labial tipping; these changes were greater in the PMG (P , .001). Volumetric root resorption was correlated with the amount of intrusion (P , .05). Conclusions: Intrusion anchoring from posterior mini-implants is preferred in cases of upright incisors, as the use of such mechanics directs the roots into the spongiosa where they undergo less root resorption and more labial tipping. (Angle Orthod. 2016;86:746-752.)

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“…8 Thus, effective incisor intrusion mechanics could be performed. 9 In addition, miniscrews are well established in the literature as an excellent source for anchorage reinforcement with high rates of success and low frequencies of adverse effects. 10 Consequently, identifying the plausible effects of miniscrews and other different intrusive mechanics would be of pronounced importance to clinicians.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of miniscrew-supported maxillary incisor intrusion in deep-bite correction: A systematic review and meta-analysis

Sosly

Mohammed

Rizk

et al. 2019

The Angle Orthodontist

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Objectives: To evaluate systematically the effectiveness of miniscrew-supported maxillary incisor intrusion compared with other nonsurgical intrusive mechanics for deep-bite correction. Materials and Methods: Unrestricted electronic searches in Embase, Web of Science, MEDLINE, LILACS, and Cochrane's CENTRAL as well as manual searches were conducted up to August 2019. Only randomized clinical trials (RCTs) were included. Study selection, data extraction, and bias assessment were done by two independent reviewers. The Cochrane risk-of-bias tool was used, and the quality of evidence was graded using the GRADE approach. A random-effects meta-analysis of continuous data, with its 95% confidence intervals (CIs), was used. Results: Seven RCTs were included in the quantitative synthesis, and the overall quality of evidence was very low to low. When compared with intrusion arches, miniscrews resulted in a more efficient deep-bite reduction with a standardized mean difference (SMD) of −0.48 (95% CI, −0.89 to −0.07). When miniscrews were used, a statistically significant difference was observed favoring less maxillary molar extrusion (SMD, −0.86; 95% CI, −1.46 to −0.27) and more incisor intrusion as measured from centroid to palatal plane (SMD, −0.95; 95% CI, −1.41 to −0.49). Results also showed a statistically nonsignificant difference regarding the amount of resultant root resorption between miniscrews and intrusion arches. Conclusions: There is weak evidence indicating efficient deep-bite correction using miniscrews. Root resorption seems to be an associated adverse effect that occurs regardless of the intrusive mechanics used. These conclusions should be viewed with great caution as further well-designed long-term research is recommended.

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A comparative study of different intrusion methods and their effect on maxillary incisors

Abstract: a b s t r a c tIntroduction: To evaluate and compare the rate of intrusion and root resorption of maxillary

Cited by 12 publications

References 16 publications

One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study

One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study

Comparison of anterior and posterior mini-implant-assisted maxillary incisor intrusion: Root resorption and treatment efficiency

Effectiveness of miniscrew-supported maxillary incisor intrusion in deep-bite correction: A systematic review and meta-analysis

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