Mandibular anterior intrusion using miniscrews for skeletal anchorage: A 3-dimensional finite element analysis

McGrath, Mauricio González del Castillo; Araujo-Monsalvo, Víctor Manuel; Murayama, Noriko; Martínez-Cruz, Marcos; Justus-Doczi, Roberto; Domínguez-Hernández, Víctor Manuel; Ondarza-Rovira, R.

doi:10.1016/j.ajodo.2018.01.009

Cited by 20 publications

(8 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A distointrusive force was delivered directly from the mini-implants to the mandibular anterior teeth to improve the level of periodontal support (Figures 4B and 5). 27,28 However, achieving pure intrusion in teeth with severe alveolar bone loss could be challenging due to the risk of uncontrolled inclination. The intrusive force must pass through a displaced center of resistance of the target segment identified according to the amount of alveolar bone loss.…”

Section: Discussionmentioning

confidence: 99%

“…The intrusive force must pass through a displaced center of resistance of the target segment identified according to the amount of alveolar bone loss. [27][28][29][30] Additionally, the magnitude of force must be minimal and should not exceed 10 g per tooth. 29 Further, trauma from occlusion and oral hygiene should be controlled strictly during treatment, and the root status should be regularly monitored.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Conservative orthodontic treatment for severe pathologic migration following total glossectomy: A case report

et al. 2022

View full text Add to dashboard Cite

Glossectomy combined with radiotherapy causes different levels of tongue function disorders and leads to severe malocclusion, with poor periodontal status in cancer survivors. Although affected patients require regular access to orthodontic care, special considerations are crucial for treatment planning. This case report describes the satisfactory orthodontic management for the correction of severe dental crowding in a 43-year-old female 6 years after treatment for tongue cancer with total glossectomy combined with radiotherapy, to envision the possibility of orthodontic care for oral cancer survivors. Extraction was performed to correct dental crowding and establish proper occlusion following alignment, after considering the possibility of osteoradionecrosis. Orthodontic mini-implants were used to provide skeletal anchorage required for closure of the extraction space and intrusion of the anterior teeth. The dental crowding was corrected, and Class I occlusal relationship was established after 36 months of treatment. The treatment outcome was sustained after 15 months of retention, and long-term follow-up was recommended.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Conservative orthodontic treatment for severe pathologic migration following total glossectomy: A case report

et al. 2022

View full text Add to dashboard Cite

show abstract

“…5 The relationship between the CBT & MRP and the initial stability of MSI was studied by limited-sample researches or experimental studies in vivo or ex vivo previously. [6][7][8][9] Therefore, in this retrospective study, we conducted a large sample-sized observational clinical studies concerning CBT, MRP and other related factors for their effect on the success rate of MSI. The timing and insertion sites were chosen according to the treatment plans, while the length and diameter of the MSI were decided based on the anatomical structure.…”

Section: Introductionmentioning

confidence: 99%

“…Among all these factors, location related factors such as cortical bone thickness (CBT) and miniscrew implant root proximity (MRP) and insertion jaws are considered to be important 5 . The relationship between the CBT & MRP and the initial stability of MSI was studied by limited‐sample researches or experimental studies in vivo or ex vivo previously 6‐9 . Therefore, in this retrospective study, we conducted a large sample‐sized observational clinical studies concerning CBT, MRP and other related factors for their effect on the success rate of MSI.…”

Section: Introductionmentioning

confidence: 99%

The effects of cortical bone thickness and miniscrew implant root proximity on the success rate of miniscrew implant: A retrospective study

Zhang

Choi

et al. 2021

Orthod Craniofacial Res

View full text Add to dashboard Cite

Objective: To investigate the effects of cortical bone thickness (CBT), miniscrew implant root proximity (MRP) and other related factors on the success rate of miniscrew implant (MSI). Materials and Methods: Four hundred and five MSIs placed in 171 patients were analysed in this retrospective study. The primary predictor variables were CBT and MRP at MSI insertion sites. The predictor variables also included patient, location, MSI design and procedure related factors. The outcome variable was the survival of MSI. The differences in measurement data between success group and failed group were evaluated by the analysis of variance and independent samples t tests. Patient, location, MSI design and procedure related factors associated with the MSI prognosis were analysed by survival analysis with Cox proportional hazard regression model. The P value was set at .05. And the survival curves of independent factors were plotted. Results:The overall success rate of MSI was 82.7%. The age of MSI host, CBT, interdental root distance (IRD) and MRP at MSI sites showed no significant differences between failed group and success group. CBT and insertion jaws were independent prognosis factors screened out by Cox proportional hazard regression model. Failure risk (hazard ratio) of MSI with CBT <1 mm was 4.72. The failure risk in the mandible was 3.80 times as high as that in the maxilla. Conclusion:Inadequate CBT (<1 mm) contributed to the failure of MSI. MSI placed in the maxilla showed better prognosis compared to the mandible. MRP had no significant effect on the prognosis.

show abstract

“…The finite element (FE) analyses method uses mathematical calculations to evaluate the effects of external loads applied to three-dimensional (3D) structures. This method is suitable and reliable for the testing of the biomechanical effects of different mechanics in orthodontics [3,27,28,29,30], analyzing the stress and displacement of structures under various boundary and loading conditions and studying areas that are difficult or impossible to access without any risks to a human sample [31,32].…”

Section: Introductionmentioning

confidence: 99%

Pure Mandibular Incisor Intrusion: A Finite Element Study to Evaluate the Segmented Arch Technique

Brito

Marra

et al. 2019

Materials

View full text Add to dashboard Cite

Leveling the curve of Spee is a commonly-used strategy to correct deep bites. Although several techniques have been proposed to intrude mandibular incisors (MI), flaring of these teeth is often observed and in many instances undesired. A three-dimensional (3D) finite element model (FEM) was used to locate the ideal point of force application (PFA) to achieve pure MI intrusion with the three-piece arches’ technique. It comprised (1) a 0.021 × 0.025 in. stainless steel (SS) wire that passively filled the slots of the canine and premolar brackets and the first and second molar tubes, bilaterally; (2) a 0.0215 × 0.0275 in. SS intrusion base arch (IBA) inserted into the MI brackets, that presented a step down distal to the lateral incisors brackets and a posterior extension arm; (3) titanium-molybdenum tip-back springs designed to apply the intrusion force, fitted inside the first molar gingival tube. Four PFA on the IBA were simulated (FEM 1, 2, 3, and 4). FEM 3 resulted in pure MI and was considered the ideal PFA. FEM1 and 2 showed intrusion and buccal crown flaring of the MI, whereas FEM4 resulted in intrusion and lingual crown flaring of those teeth. Clinicians may consider three-piece arch mechanics to achieve pure MI intrusion. However, they must be aware that when force was applied anteriorly or posteriorly to the ideal PFA, the incisors would incline labially or lingually, respectively.

show abstract

Mandibular anterior intrusion using miniscrews for skeletal anchorage: A 3-dimensional finite element analysis

Cited by 20 publications

References 27 publications

Conservative orthodontic treatment for severe pathologic migration following total glossectomy: A case report

Conservative orthodontic treatment for severe pathologic migration following total glossectomy: A case report

The effects of cortical bone thickness and miniscrew implant root proximity on the success rate of miniscrew implant: A retrospective study

Pure Mandibular Incisor Intrusion: A Finite Element Study to Evaluate the Segmented Arch Technique

Contact Info

Product

Resources

About