Cortical bone thickness and bone density effects on miniscrew success rates: A systematic review and meta‐analysis

Lee, Dong-Wook; Park, Jae Hyun; Bay, R. Curtis; Choi, Sung-Kwon; Chae, Jong‐Moon

doi:10.1111/ocr.12453

Cited by 21 publications

(26 citation statements)

References 24 publications

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“…This is in agreement with the findings of Berens et al, who reported a failure rate of less than 10 % for palatal and buccal maxillary interdadicular locations when choosing a screw geometry that is well adapted to the space available [ 45 ]. A recent systematic review reported a similar loss rate for the interradicular insertion sites in the maxilla [ 46 ]. Moreover, these authors also found a slightly lower average loss rate for implants placed in the midpalatal and paramedian region (0–5 %).…”

Section: Discussionmentioning

confidence: 93%

Class II correction by maxillary en masse distalization using a completely customized lingual appliance and a novel mini-screw anchorage concept – preliminary results

Beyling¹,

Klang²,

Niehoff

et al. 2021

Head Face Med

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Background The aim of the study was to evaluate the efficacy of a novel en masse distalization method in the maxillary arch in combination with a completely customized lingual appliance (CCLA; WIN, DW Lingual Systems, Germany). Therefore, we tested the null-hypothesis of a significant deviation from an Angle-Class I canine relationship and a normal overjet defined by an individual target set-up after dentoalveolar compensation in Angle Class II subjects. Methods This retrospective study included 23 patients, (m/f 3/20, mean age 29.6 years (min/max, 13.6/50.9 years)), with inclusion criteria of an Angle Class II occlusion of more than half a cusp prior to en masse distalization and treatment completed consecutively with a CCLA in combination with a mini-screw (MS) anchorage for uni- or bilateral maxillary distalization (12 bilateral situations, totalling 35). Plaster casts taken prior to (T0) and following CCLA treatment (T3) were compared with the treatment plan / set-up (TxP, with a Class I canine relationship and a normal overjet as the treatment objective). MSs were placed following levelling and aligning (T1) and removed at the end of en masse distalization at T2. Statistical analysis was carried out using Schuirmann’s TOST [two one-sided tests] equivalence test, based on a one-sample t-test with α = 0.025 on each side (total α = 0.05). Results Ninety-seven percent of planned correction of the canine relationship was achieved (mean 3.6 of 3.7 mm) and also 97 % of the planned overjet correction (mean 3.1 of 3.2 mm), with a statistically significant equivalence (p < 0.0001) for canine relationship and overjet between the individual treatment plan (set-up) and the final outcome. Adverse effects were limited to the loss of n = 2 of 35 mini-screws. However, in each instance, the treatment was completed, as scheduled, without replacing them. Accordingly, the null-hypothesis was rejected. Conclusions The technique presented allows for a predictable correction of an Angle-Class II malocclusion via dentoalveolar compensation with maxillary en masse distalization.

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Section: Discussionmentioning

confidence: 93%

Class II correction by maxillary en masse distalization using a completely customized lingual appliance and a novel mini-screw anchorage concept – preliminary results

Beyling¹,

Klang²,

Niehoff

et al. 2021

Head Face Med

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“…The stability of a miniscrew is affected by stress applied to the surrounding bone [ 9 , 31 , 38 , 45 , 46 , 47 ]. In this study, we used a finite element analysis model to measure the stress values on the surrounding bone and miniscrew at each part.…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Head Hole Position on the Rotational Resistance and Stability of Orthodontic Miniscrews: A Three-Dimensional Finite Element Study

Choi

Kim

et al. 2021

Sensors

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The orthodontic miniscrew is driven into bone in a clockwise direction. Counter-clockwise rotational force applied to the implanted miniscrew can degrade the stability. The purpose of this three-dimensional finite element study was to figure out the effect of shifting the miniscrew head hole position from the long axis. Two miniscrew models were developed, one with the head hole at the long axis and the other with an eccentric hole position. One degree of counter-clockwise rotation was applied to both groups, and the maximum Von-Mises stress and moment was measured under various wire insertion angles from −60° to +60°. All Von-Mises stress and moments increased with an increase in rotational angle or wire insertion angle. The increasing slope of moment in the eccentric hole group was significantly higher than that in the centric hole group. Although the maximum Von-Mises stress was higher in the eccentric hole group, the distribution of stress was not very different from the centric hole group. As the positive wire insertion angles generated a higher moment under a counter-clockwise rotational force, it is recommended to place the head hole considering the implanting direction of the miniscrew. Clinically, multidirectional and higher forces can be applied to the miniscrew with an eccentric head hole position.

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“…4,5 Mechanical stability refers to stability over the entire duration of the active phase of treatment, which depends on the MS surface characteristics, screw length and diameter, type of access with or without pilot drilling, bone cortical thickness, and the patient's periodontal health. [6][7][8][9] Stability of MSs is a key for successful orthodontic treatment, especially in long-term loading cases to guard against displacement. 9 Modification of the MS surface seems to be a promising factor for improving stability and decreasing failure rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface treatment on the mechanical stability of orthodontic miniscrews:

Al-Thomali¹,

Basha²,

Mohamed³

2021

The Angle Orthodontist

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Objectives To provide collective quantitative evidence about the effect of surface treatments on the mechanical stability of orthodontic miniscrews (MSs). Materials and Methods The study was registered in PROSPERO (No. CRD42020209652). The research question was defined according to the PICO (population, intervention, control, and outcomes) format. Various research databases were searched for animal and human studies on effects of surface treatment on the mechanical stability of MSs. Both prospective and retrospective in vivo clinical studies published in English were included. The risk of bias was assessed using SYRCLE's risk of bias tool for animal studies. The meta-analysis was conducted using RevMan 5.4. Results A total of 109 articles were identified; 14 were included in the systematic review, and seven studies with sandblasting, acid etching (SLA) methods of surface treatment were included for meta-analysis. The number of study participants ranged from 6 to 24 (total n = 185), with a mean of 13.2. A total of 949 MSs were used with a mean of 67.8. The overall success rate for surface-treated MSs ranged from 47.9% to 100%. Forest plot of removal torque values showed significantly higher values for SLA surface-treated MSs compared with controls with a standard mean difference of 2.61 (95% confidence interval = 1.49–3.72, I2 = 85%). Forest plot of insertion torque showed a standard mean difference of –6.19 (95% confidence interval = –13.63–1.25, I2 = 98%, P = .10). Conclusions Surface treatment of MSs improved primary and secondary stability with good osseointegration at the bone-implant surface. However, significant heterogeneity across the studies included in the meta-analysis made it difficult to draw conclusions.

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Cortical bone thickness and bone density effects on miniscrew success rates: A systematic review and meta‐analysis

Cited by 21 publications

References 24 publications

Class II correction by maxillary en masse distalization using a completely customized lingual appliance and a novel mini-screw anchorage concept – preliminary results

Class II correction by maxillary en masse distalization using a completely customized lingual appliance and a novel mini-screw anchorage concept – preliminary results

Effect of Different Head Hole Position on the Rotational Resistance and Stability of Orthodontic Miniscrews: A Three-Dimensional Finite Element Study

Effect of surface treatment on the mechanical stability of orthodontic miniscrews:

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