Comparative evaluation of displacement and stress distribution pattern during maxillary arch distalization with Infra Zygomatic Screw- A three dimensional finite element study

Khan, Junaid Iqbal; Goyal, Manish; Kumar, Mukesh; Kushwah, Ashish; Kaur, Amandeep; Sharma, Madhur

doi:10.1016/j.ortho.2021.03.006

Cited by 9 publications

(15 citation statements)

References 19 publications

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“…The highest amount of stress was 85.65MPa in Case 2, which is far below the ultimate tensile strength, indicating that both cases were clinically safe. Khan et al 23 and Kushwah et al 27 also found that during distalization and en-masse retraction process, a von Mises stress below 135MPa is safe.…”

Section: Discussionmentioning

confidence: 98%

“…The achieved distalization can sometimes differ at the crown and root level, which can be attributed to the distal tipping that can occur due to various reasons. 20,21 Khan et al 23 also found that distally placed infrazygomatic crest (IZC) implants show more distalization in the maxillary dentition. In the present study, the distally placed buccal-shelf implant presented higher amount of distalization, in comparison to the mesially placed inter-radicular implant.…”

Section: Lateral Incisor Caninementioning

confidence: 99%

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Comparative evaluation of displacement and stress distribution pattern during mandibular arch distalization with extra and inter-radicular mini-implants: a three-dimensional finite element study

MAHESHWARI,

CHAWDA,

KUSHWAH

et al. 2023

Dental Press J. Orthod.

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Objective: To compare the initial stress distribution and displacement on mandibular dentition using extra and inter-radicular mini-implants for arch distalization, by means of finite element analysis. Methods: For this study, two finite element models of the mandible were designed. The models consisted of periodontal ligament (PDL) and alveolar bone of all teeth until second molars. In the Case 1, bilateral extra-radicular buccal-shelf stainless steel mini-implants (10.0-mm length; 2.0-mm diameter) were placed between first and second permanent molars. In the Case 2, bilateral inter-radicular stainless steel mini-implants (10.0-mm length; 1.5-mm diameter) were placed between second premolar and first permanent molar. Power hook was attached between canine and first premolar at a fixed height of 8mm. In the two cases, 200g of distalization force was applied. ANSYS v. 12.1 software was used to analyze and compare von Mises stress and displacement in the mandibular dentition, PDL and bone. Results: Higher stresses were observed in mandibular dentition with the inter-radicular implant system. The amount of von Mises stress was higher for cortical bone (85.66MPa) and cancellous bone (3.64MPa) in Case 2, in comparison to cortical bone (41.93MPa) and cancellous bone (3.43MPa) in Case 1. The amount of arch distalization was higher for mandible in Case 1 (0.028mm), in comparison to Case 2 (0.026mm). Conclusion: Both systems were clinically safe, but extra-radicular implants showed more effective and controlled distalization pattern, in comparison to inter-radicular implants, in Class III malocclusion treatment.

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Section: Discussionmentioning

confidence: 98%

Section: Lateral Incisor Caninementioning

confidence: 99%

Comparative evaluation of displacement and stress distribution pattern during mandibular arch distalization with extra and inter-radicular mini-implants: a three-dimensional finite element study

MAHESHWARI,

CHAWDA,

KUSHWAH

et al. 2023

Dental Press J. Orthod.

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“…Further, Junaid K et al 20 inferred that von mises stress in alveolar bone (cortical bone) was maximum when IZC was placed at mesiobuccal root of first molar mesialy (107.79 MPa) at the screw fixation site that was within the optimum limit (135 MPa).…”

Section: Discussionmentioning

confidence: 99%

Clinical applicability of IZC’s in orthodontics - A review

Lovely

Raghav²,

Reddy³

2023

JCO

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IZC as orthodontic bone screws (OBSs) are well-established and reliable devices that considerably expand the scope for conservative treatment of severe and complex malocclusions. Despite of few documentations, some orthodontists have incorporated these devices into routine clinical practice. Therefore, it is clear that IZC bone screws will substantially impact the future of orthodontics and dentofacial orthopaedics.

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“…Junaid et al . [ 21 ] found that the best IZC site is distal to the anatomic ridge and buccal to the mesiobuccal root of the second maxillary molar.…”

Section: Discussionmentioning

confidence: 99%

Dentoalveolar and airway changes following en masse distal movement of the maxillary dentition with infrazygomatic crest anchorage: A prospective study

Jain¹,

Ramsundar²,

Balakrishnan³

2023

JISPCD

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A BSTRACT Aims and Objectives: Mini screws placed buccal to the maxillary first or second molars in the infra zygomatic crest (IZC) region can be used as anchors for various types of tooth movement. En masse distal movement of the maxillary dentition with IZC anchorage is routinely practiced nowadays as more patients demand a non-extraction treatment and it should be evaluated. The goal of this study was to assess dentoalveolar and airway changes in individuals with class II malocclusion after en masse distal movement of the maxillary dentition utilizing infrazygomatic anchorage. Materials and Methods: This prospective study included patients who required en masse distal movement of the maxillary dentition. Following initial leveling and aligning, mini screws were placed in the IZC region, and the maxillary arch was distalized en-masse. Pre (T0) and post distalization (T1) lateral cephalograms were traced for dentoalveolar and airway changes. Statistical tests were done with SPSS software. Shapiro-Wilk test for normality and paired T test for comparison between before and after en masse distalization were done. Results: The changes in dental angular and linear measurements such as U1 to N-A, L1 to N-B and interincisal angle, U1 to N-A and U1 to point A distance, U1 to palatal plane, L1 to N-B, L1 to Apo line distance, U6 to PtV were statistically significant ( P > 0.05). Linear parameters such as L1 to ApO line, upper airway, and lower airway were not statistically significant (<0.05). Conclusion: Class II div I malocclusions can be efficiently corrected without extractions using IZC anchorage by en masse distal movement of the maxillary dentition. Significant reduction in upper anterior inclination, intrusion of maxillary anterior teeth, and distal movement of the posterior teeth were noted. No changes in airway dimensions were noted.

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Comparative evaluation of displacement and stress distribution pattern during maxillary arch distalization with Infra Zygomatic Screw- A three dimensional finite element study

Cited by 9 publications

References 19 publications

Comparative evaluation of displacement and stress distribution pattern during mandibular arch distalization with extra and inter-radicular mini-implants: a three-dimensional finite element study

Comparative evaluation of displacement and stress distribution pattern during mandibular arch distalization with extra and inter-radicular mini-implants: a three-dimensional finite element study

Clinical applicability of IZC’s in orthodontics - A review

Dentoalveolar and airway changes following en masse distal movement of the maxillary dentition with infrazygomatic crest anchorage: A prospective study

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