Atypical orthodontic extraction pattern managed by differential en-masse retraction against a temporary skeletal anchorage device in the treatment of bimaxillary protrusion

Chung, Kyu‐Rhim; Choo, HyeRan; Lee, Jinhwa; Kim, Seong Hun

doi:10.1016/j.ajodo.2009.08.036

Cited by 17 publications

(17 citation statements)

References 8 publications

(8 reference statements)

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“…10,30 The longer head part reduces the risk of screw loosening because of the surface treatment of the screw, thereby enhancing osseointegration. Mini-implants can be used as a preliminary restorative aid when the morphology of the alveolar bone is not ideal.…”

mentioning

confidence: 99%

Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

Choi

Lee²,

et al. 2011

Korean J Orthod

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Objective: To evaluate the extent and aspect of stress to the cortical bone after application of a lateral force to a two-component orthodontic mini-implant (OMI, mini-implant) by using three-dimensional finite element analysis (FEA). Methods: The 3D-finite element models consisted of the maxilla, maxillary first molars, second premolars, and OMIs. The screw part of the OMI had a diameter of 1.8 mm and length of 8.5 mm and was placed between the roots of the upper second premolar and the first molar. The cortical bone thickness was set to 1 mm. The head part of the OMI was available in 3 sizes: 1 mm, 2 mm, and 3 mm. After a 2 N lateral force was applied to the center of the head part, the stress distribution and magnitude were analyzed using FEA. Results: When the head part of the OMI was friction fitted (tapped into place) into the inserted screw part, the stress was uniformly distributed over the surface where the head part was inserted. The extent of the minimum principal stress suggested that the length of the head part was proportionate with the amount of stress to the cortical bone; the stress varied between 10.84 and 15.33 MPa. Conclusions: These results suggest that the stress level at the cortical bone around the OMI does not have a detrimental influence on physiologic bone remodeling.

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confidence: 99%

Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

Choi

Lee²,

et al. 2011

Korean J Orthod

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“…According to Chung et al this could have been prevented by using different force levels on right and left sides. 5 However, in present case midline was later matched using asymmetric Class II elastics-double on right side and single on left side. After en masse retraction of lower anterior segment mandibular second premolar was distalized to bring it in the center of first molar space so that it can be used as abutment for first molar prosthesis.…”

Section: Discussionmentioning

confidence: 99%

An Innovative Treatment Approach with Atypical Orthodontic Extraction Pattern in Bimaxillary Protrusion Case

Miglani¹,

Kumar²,

Chopra³

et al. 2013

JIOS

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This case report describes the treatment of a 23-year-old female with severe bimaxillary dentoalveolar protrusion and missing left mandibular first molar. Her chief concern was significant facial convexity. Generally treatment plan of such cases involves extraction of first premolars but absence of first molar complicates situation with problem of space management, anchorage requirement and post-treatment occlusion. This case report introduces thought provoking treatment approach of selecting atypical teeth for orthodontic extraction without compromising the quality of treatment outcomes. However, three first bicuspids were extracted while the mandibular left second premolar was distalized into the missing molar space and used as an abutment for replacement of the missing first molar by prosthesis. Despite the unusual asymmetric extraction of teeth, superimposition of the pretreatment and post-treatment cephalometric tracings shows excellent treatment outcomes and reduction of facial convexity by maximum retraction of the anterior teeth.

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“…Unilateral problems are generally more difficult to treat than bilateral problems. The use of SA provides either stabilization of the side that does not need correction or selective force application to the side to be corrected …”

Section: Vertical Planementioning

confidence: 99%

“…The use of SA provides either stabilization of the side that does not need correction or selective force application to the side to be corrected. [35][36][37] Based on the current evidence, we have developed guidelines where dental movement assisted by SA is evaluated under three criteria: (1) whether the desired movement is possible, (2) whether it is reasonable to produce this direction of tooth movement, and (3) whether the result will be stable. Information regarding long-term stability is scarce, and further research is needed in order to adopt an evidence-based approach during treatment planning phase (see table II in Current Status of Skeletal Anchorage Dental Applications in Orthodontics Part I).…”

Section: Transversal Planementioning

confidence: 99%

Current Status of Skeletal Anchorage Dental Applications in Orthodontics, Part II

Wiechmann

Grauer

Swift³

2014

J Esthet Restor Dent

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Atypical orthodontic extraction pattern managed by differential en-masse retraction against a temporary skeletal anchorage device in the treatment of bimaxillary protrusion

Cited by 17 publications

References 8 publications

Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

An Innovative Treatment Approach with Atypical Orthodontic Extraction Pattern in Bimaxillary Protrusion Case

Current Status of Skeletal Anchorage Dental Applications in Orthodontics, Part II

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