Influence of Invisalign treatment with interproximal enamel reduction (IER) on bone volume for adult crowding: a retrospective three-dimensional cone beam computed tomography study

Hellak, Andreas; Schmidt, Nicola; Schauseil, Michael; Stein, Steffen; Drechsler, Thomas; Korbmacher-Steiner, Heike

doi:10.1186/s12903-016-0281-1

Cited by 8 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Measurements at T0 and T1 were taken on the same sections following previously published methods [ 24 , 26 , 33 , 34 ]. The primary outcome measures were the alveolar bone crest levels and thicknesses.…”

Section: Methodsmentioning

confidence: 99%

“…4 a, b). The buccal and palatal bone plate thicknesses (BBPT and PBPT) were measured perpendicularly to the long axis of the canine at two different levels: 3 and 6 mm apical to the CEJ [ 34 ] (Fig. 4 c–f).…”

Section: Methodsmentioning

confidence: 99%

“…Alveolar bone thickness: buccal and palatal alveolar plate thicknesses were measured perpendicular to the long axis from the root surface to the corresponding buccal and palatal alveolar bone plate at two different distances from the CEJ: 3 mm (c, d) and 6 mm (e, f ). Root length was measured as the distance (g) along the long axis of the tooth perpendicular to two reference lines, the first line passing through the buccal and palatal CEJ of the canine and the other line through the canine root apex canine at two different levels: 3 and 6 mm apical to the CEJ [34] (Fig. 4c-f ).…”

Section: Cbct Imaging and Measurementsmentioning

confidence: 99%

See 2 more Smart Citations

Three-dimensional evaluation of the effects of injectable platelet rich fibrin (i-PRF) on alveolar bone and root length during orthodontic treatment: a randomized split mouth trial

et al. 2021

View full text Add to dashboard Cite

Background The role of injectable platelet rich fibrin (i-PRF) in orthodontic treatment has not been investigated with focus on its effect on dental and bony periodontal elements. Objective To evaluate the efficacy of i-PRF in bone preservation and prevention of root resorption. Methods A randomized split-mouth controlled trial included 21 patients aged 16–28 years (20.85 ± 3.85), who were treated for Class II malocclusion with the extraction of the maxillary first premolars. Right and left sides were randomly allocated to either experimental treated with i-PRF or control sides. After the leveling and alignment phase, the canines were retracted with 150gm forces. The i-PRF was prepared from the blood of each patient following a precise protocol, then injected immediately before canine retraction on the buccal and palatal aspects of the extraction sites. Localized maxillary cone beam computed tomography scans were taken before and after canine retraction to measure alveolar bone height and thickness and canine root length (indicative of root resorption), and the presence of dehiscence and fenestration. Paired sample t-tests and Wilcoxon signed rank tests were used to compare the changes between groups. Results No statistically significant differences in bone height, bone thickness were found between sides and between pre- and post-retraction period. However, root length was reduced post retraction but did not differ between sides. In both groups, postoperative dehiscence was observed buccally and palatally and fenestrations were recorded on only the buccal aspect. Conclusions I-PRF did not affect bone quality during canine retraction or prevent canine root resorption. I-PRF did not reduce the prevalence of dehiscence and fenestration. Trial registration ClinicalTrials.gov (identifier number: NCT 03399760. 16/01/2018).

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Cbct Imaging and Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional evaluation of the effects of injectable platelet rich fibrin (i-PRF) on alveolar bone and root length during orthodontic treatment: a randomized split mouth trial

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The cortical bone represents the limit for orthodontic tooth movement, which should be considered especially during treatment of crowding with proclination and expansion. 3 Interproximal reduction increases the amount of space available. It also offers an attractive alternative to dental extractions as the quantity of enamel removed can be calculated to match the amount of space required for the resolution of dental crowding.…”

Section: Introductionmentioning

confidence: 99%

Quantitative evaluation of implemented interproximal enamel reduction during aligner therapy:

Kalemaj¹,

Levrini²

2020

The Angle Orthodontist

View full text Add to dashboard Cite

Objectives To investigate the correspondence between programmed interproximal reduction (p-IPR) and implemented interproximal reduction (i-IPR) in an everyday-practice scenario. The secondary objective was to estimate factors that might influence i-IPR to make the process more efficient. Materials and Methods Fifty patients treated with aligner therapy by six orthodontists were included in this prospective observational study. Impressions were taken at the beginning of treatment and after the first set of aligners. Data on p-IPR, i-IPR and technical aspects of IPR were gathered for 464 teeth. Statistical analyses included the Wilcoxon signed-rank test, Kruskal-Wallis, and multilevel mixed regression. Results Mean difference between p-IPR and i-IPR was 0.15 mm (SD: 0.14 mm; P = .0001), with lower canines showing the highest discrepancy. Use of burs and measuring gauges resulted in a smaller difference (respectively: coeff.: 0.09, P = .029; coeff.: −0.06, P = .013). IPR was performed more accurately on the mesial surface of teeth than on the distal surface. Round tripping before IPR resulted in a slightly more precise i-IPR compared to the previous alignment (coeff.: −0.021, P = .041). Conclusions Implemented IPR tends to be less than p-IPR, especially for lower canines and distal surfaces of teeth. Burs tend to provide more precise i-IPR, especially compared to manual strips; however, there is variation between the techniques. Using a measuring gauge tends to increase the precision of i-iPR. As several factors influence the implementation of IPR, particular attention must be paid during the procedure to maximize its precision.

show abstract

“…Furthermore, non-isotropic voxels could lead to lower resolution of the reconstructed images compared with original axial scans. In the1990s, tomography systems such as cone beam CT (CBCT) were introduced for the head and neck imaging to overcome the limitations of CT. 1,2 In the recent years, CBCT has been increasingly used in different fields of dentistry 3,6 with several applications in implant treatment. 7 One of the advantages of CBCT software for dentists is the possibility to make linear measurements between anatomical locations.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Linear Measurements Made on Cone Beam Computed Tomography Scans at Different Magnifications

Ghaznavi¹,

Ghaznavi

Valizadeh

et al. 2019

J. contemp. med. sci.

View full text Add to dashboard Cite

Objective This study aimed to evaluate the accuracy of linear measurements made on cone beam computed tomography (CBCT) (New Tom VGi) scans with different image magnifications. Methods Forty-two titanium pins were inserted into seven dry sheep mandibles. Lengths of the pins were measured using a digital caliper with 0.01 mm readability, and the mandibles were radiographed using a CBCT unit. After reconstruction of CBCT images, three experienced radiologists measured the length and diameter of titanium pins at 100%, 200% and 400% magnifications. Accuracy of measurements was analyzed using descriptive statistics and one-way analysis of variance. P < 0.05 was considered statistically significant. Interobserver reliability was calculated using the intraclass correlation coefficient test. Results The mean differences of linear measurements from the actual lengths of pins were 0.1960, 0.2143 and 0.2047 mm at 100%, 200% and 400% magnifications, respectively (P > 0.05). The mean differences of linear measurements from the actual diameters of pins were 0.2206, 0.2063 and 0.1984 mm at 100%, 200% and 400% magnifications, respectively (P > 0.05). Interobserver reliability of pin length measurements was estimated to be 0.285, 0.707 and 0.479 at 100%, 200% and 400% magnifications, respectively. Interobserver reliability of pin diameter measurements was 0.078, 0.469 and 0.587 at 100%, 200% and 400% magnifications, respectively. Conclusion Based on the results, image magnification does not affect the accuracy of linear measurements made on CBCT scans. Interobserver reliability of pin length measurements was good at 200% magnification, while it was below the acceptable range at other magnifications. For measurement of pin diameters, this index was below the acceptable range at all magnifications.

show abstract

Influence of Invisalign treatment with interproximal enamel reduction (IER) on bone volume for adult crowding: a retrospective three-dimensional cone beam computed tomography study

Cited by 8 publications

References 26 publications

Three-dimensional evaluation of the effects of injectable platelet rich fibrin (i-PRF) on alveolar bone and root length during orthodontic treatment: a randomized split mouth trial

Three-dimensional evaluation of the effects of injectable platelet rich fibrin (i-PRF) on alveolar bone and root length during orthodontic treatment: a randomized split mouth trial

Quantitative evaluation of implemented interproximal enamel reduction during aligner therapy:

Accuracy of Linear Measurements Made on Cone Beam Computed Tomography Scans at Different Magnifications

Contact Info

Product

Resources

About