Primary stability and histomorphometric bone-implant contact of self-drilling and self-tapping orthodontic microimplants

Çehreli, Sevi Burçak; Arman-Özçırpıcı, Ayça

doi:10.1016/j.ajodo.2011.07.020

Cited by 41 publications

(38 citation statements)

References 26 publications

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“…IT presented a substantial negative correlation with PTV, as has previously been found. 20,24,26 The correlation between PTV and PS was also negative. The two mechanical measures used to evaluate stability axially (IT and PS) presented strong positive correlation, in agreement with previous studies.…”

Section: Discussionmentioning

confidence: 86%

“…Cortical BMD presented no valid correlation with IT, PS, or PTV, in disagreement with previous studies. 16,24,16 However, the methodology of BMD evaluation differed. While this study evaluated BMD three-dimensionally by means of micro-CT, a more accurate method, 35 the others used CT slices.…”

Section: Discussionmentioning

confidence: 99%

“…There is no consensus about the reliability of the Periotest for assessing implant stability. Some authors consider the Periotest a good tool for measuring stability in dental implants [19][20][21][22] and mini-implants 23,24 ; others disagree. 25 In our study, there was correlation between the PTV value and the other two stability measures.…”

Section: Discussionmentioning

confidence: 99%

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Is trabecular bone related to primary stability of miniscrews?

Marquezan

Lima

Lopes

et al. 2013

The Angle Orthodontist

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Objective: To compare the primary stability of miniscrews inserted into bone blocks of different bone mineral densities (BMDs) with and without cortical bone, and investigate whether some trabecular properties could influence primary stability. Materials and Methods: Fifty-two bone blocks were extracted from fresh bovine pelvic bone. Four groups were created based on bone type (iliac or pubic region) and presence or absence of cortical bone. Specimens were micro-computed tomography imaged to evaluate trabecular thickness, trabecular number, trabecular separation, bone volume density (BV/TV), BMD, and cortical thickness. Miniscrews 1.4 mm in diameter and 6 mm long were inserted into the bone blocks, and primary stability was evaluated by insertion torque (IT), mini-implant mobility (PTV), and pull-out strength (PS). Results: Intergroup comparison showed lower levels of primary stability when the BMD of trabecular bone was lower and in the absence of cortical bone (P # .05). The Pearson correlation test showed correlation between trabecular number, trabecular thickness, BV/TV, trabecular BMD, total BMD, and IT, PTV, and PS. There was correlation between cortical thickness and IT and PS (P # .05). Conclusion: Cancellous bone plays an important role in primary stability of mini-implants in the presence or absence of cortical bone. (Angle Orthod. 2014;84:500-507.)

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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Is trabecular bone related to primary stability of miniscrews?

Marquezan

Lima

Lopes

et al. 2013

The Angle Orthodontist

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“…The ability to hold the screw in the bone is defined by parameters such as: 1. tightening torque and 2. pull out force. Experimental studies have revealed a positive correlation between these two variables and the thickness and density of the cortical plate and density of the cancellous bone, [21][22][23][24] further supported by the results of research on human cadavers. 25 Motoyoshi et al have established that the critical thickness ensuring sufficient primary stability is 1 mm.…”

Section: Bone Anatomy and Histologymentioning

confidence: 63%

Fundamental factors related to orthodontic micro-implant stability: Review of the literature

Łyczek¹,

Antoszewska-Smith²

2017

Dent. Med. Probl.

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The development and introduction of temporary intraoral anchorage devices (TISAD) in the beginning of the 21 st century had a great impact on contemporary orthodontics. The enhancement of the scope of orthodontic treatment, improved efficiency, reduction of both the treatment time and need for the patient's compliance, all of these are the crucial advantages the TISAD have provided to our profession. However, there are also some limiting factors pertaining to this anchorage reinforcement technique which must be borne in mind prior to clinical application. Among some others, premature failure of the micro-implants is the most significant problem related to their utilization, as it entails a repetition of the insertion procedure, increasing the cost and duration of treatment and causing the patient's discomfort. Therefore, recognition of the factors related to the stability of orthodontic micro-implants is necessary for their efficient clinical application and maximum survival rates. Since over the last decade there has been noteworthy progress in the research investigating the issue of micro-implant stability, a review of the most current literature pertaining to this topic was the aim of our article, and ultimately providing clinical recommendations.

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“…The same absence of statistical significance (p = 0.3139) of the static load influence on stability was disclosed in [38,40]. Çehreli and Arman-Ozçirpici ranked insertion torque values in different ranges according to clinical needs, the values lower than 5 Ncm being considered poor for clinical applications [41]. The values of our removal torque after dynamic loads of 5 N were below 5 Ncm (3.6 ± 2.22 Ncm), which demonstrated the detrimental effect of the intermittent loads applied by the dynamic cycles in the primary stability of the temporary screws.…”

Section: Discussionmentioning

confidence: 87%

Primary Stability of Temporary Screws after Dentary and Orthopedic Forces under Static and Dynamic Load Cycles

Fernandes

Barbosa

Ferreira

et al. 2017

Metals

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Abstract:The objective was to analyze the influence of dentary and orthopedic forces under static and dynamic loads in temporary screw stability. Self-drilling titanium (Ti6Al4V) screws (6 × 1.5 mm) were inserted and removed from pig ribs. Screws were loaded by static loads of 2 N and 5 N for 5 weeks. Dynamic force was applied during 56,000 cycles for simulations of a patient's opening-closing mouth movements. Dynamic applied loads ranged from 2 to 5 N and from 5 to 7 N under a frequency of 1 Hz.Torque peak values at placement and removal were measured before and after static and dynamic cycles. Similarities in torque peaks (p = 0.3139) were identified at placement (12.54 Ncm) and removal (11.2 Ncm) of screws after a static load of 2 N. Statistical comparisons showed significant stability loss after dynamic cycles under loads of 2 N (64.82% at p = 0.0005) and 5 N (64.63% at p = 0.0026). Limited stability loss occurred in temporary screws submitted to 2 N static forces (p = 0.3139). The detrimental effects of dynamic cycles in temporary screws stability was attested after the simulation of dentary and skeletal forces, being intermittent forces more relevant in the loss of mechanical stability.

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Primary stability and histomorphometric bone-implant contact of self-drilling and self-tapping orthodontic microimplants

Cited by 41 publications

References 26 publications

Is trabecular bone related to primary stability of miniscrews?

Is trabecular bone related to primary stability of miniscrews?

Fundamental factors related to orthodontic micro-implant stability: Review of the literature

Primary Stability of Temporary Screws after Dentary and Orthopedic Forces under Static and Dynamic Load Cycles

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