Mini-implant stability at the initial healing period: A clinical pilot study

Nienkemper, Manuel; Wilmes, Benedict; Pauls, Alexander; Drescher, Dieter

doi:10.2319/040813-271.1

Cited by 32 publications

(30 citation statements)

References 26 publications

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“…Type A and Type C exhibited no significant correlation between IT and RF in both tests. Therefore, our finding is similar to that of Nienkemper et al [19], implying that higher IT does not significantly contribute to higher RF. Type A exhibited a significant correlation between IT and RT in the 90 and 45 tests.…”

Section: Mini-implantssupporting

confidence: 92%

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Evaluation of mechanical strengths of three types of mini‐implants in artificial bones

Tseng

Ting

et al. 2016

The Kaohsiung J of Med Scie

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We investigates the effect of the anchor area on the mechanical strengths of infrazygomatic mini-implants. Thirty mini-implants were divided into three types based on the material and shape: Type A (titanium alloy, 2.0×12 mm), Type B (stainless steel, 2.0×12 mm), and Type C (titanium alloy, 2.0×11 mm).The mini-implants were inserted at 90° and 45° into the artificial bone to a depth of 7 mm, without predrilling. The mechanical strengths [insertion torque (IT), resonance frequency (RF), and removal torque (RT)] and the anchor area were measured. We hypothesized that no correlation exists among the mechanical forces of each brand. In the 90° tests, the IT, RF, and RT of Type C (8.5 N cm, 10.2 kHz, and 6.1 N cm, respectively) were significantly higher than those of Type A (5.0 N cm, 7.7 kHz, and 4.7 N cm, respectively). In the 45° test, the RFs of Type C (9.2 kHz) was significantly higher than those of Type A (7.0 kHz) and Type B (6.7 kHz). The anchor area of the mini-implants was in the order of Type C (706 mm)>Type B (648 mm)>Type A (621 mm). Type C exhibited no significant correlation in intragroup comparisons, and the hypothesis was accepted. In the 90° and 45° tests, Type C exhibited the largest anchor area and the highest mechanical strengths (IT, RF, and RT) among the three types of mini-implants. The anchor area plays a crucial role in the mechanical strength of mini-implants.

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Section: Mini-implantssupporting

confidence: 92%

“…However, we found that the types with a smaller anchor area had lower RT values. Nienkemper et al [19] investigated the relationship between IT and RF and reported no significant correlation between them. In the present study, Type B exhibited a significant correlation between IT and RF in the 90 test.…”

Section: Mini-implantsmentioning

confidence: 99%

Evaluation of mechanical strengths of three types of mini‐implants in artificial bones

Tseng

Ting

et al. 2016

The Kaohsiung J of Med Scie

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“…Therefore, there is still controversy that mechanical forces (IT, RF, and RT) depend upon the material composition and shape of orthodontic microimplants. Nienkemper et al [15] reported that no significant correlation existed between the IT and RF. In the correlation analysis of the present study, the IT, RF, and RT were not significantly correlated in both the vertical and horizontal directions; therefore, our results are consistent with those of Nienkemper et al [15].…”

Section: Discussionmentioning

confidence: 97%

“…Nienkemper et al [15] reported that no significant correlation existed between the IT and RF. In the correlation analysis of the present study, the IT, RF, and RT were not significantly correlated in both the vertical and horizontal directions; therefore, our results are consistent with those of Nienkemper et al [15]. This implies that the IT cannot be used to infer the RF (primary stability), and similarly, the RF cannot be used to infer the RT.…”

Section: Discussionmentioning

confidence: 97%

Insertion torque, resonance frequency, and removal torque analysis of microimplants

Tseng

Ting

et al. 2016

The Kaohsiung J of Med Scie

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This study aimed to compare the insertion torque (IT), resonance frequency (RF), and removal torque (RT) among three microimplant brands. Thirty microimplants of the three brands were used as follows: Type A (titanium alloy, 1.5-mm × 8-mm), Type B (stainless steel, 1.5-mm × 8-mm), and Type C (titanium alloy, 1.5-mm × 9-mm). A synthetic bone with a 2-mm cortical bone and bone marrow was used. Each microimplant was inserted into the synthetic bone, without predrilling, to a 7 mm depth. The IT, RF, and RT were measured in both vertical and horizontal directions. One-way analysis of variance and Spearman's rank correlation coefficient tests were used for intergroup and intragroup comparisons, respectively. In the vertical test, the ITs of Type C (7.8 Ncm) and Type B (7.5 Ncm) were significantly higher than that of Type A (4.4 Ncm). The RFs of Type C (11.5 kHz) and Type A (10.2 kHz) were significantly higher than that of Type B (7.5 kHz). Type C (7.4 Ncm) and Type B (7.3 Ncm) had significantly higher RTs than did Type A (4.1 Ncm). In the horizontal test, both the ITs and RTs were significantly higher for Type C, compared with Type A. No significant differences were found among the groups, and the study hypothesis was accepted. Type A had the lowest inner/outer diameter ratio and widest apical facing angle, engendering the lowest IT and highest RF values. However, no significant correlations in the IT, RF, and RT were observed among the three groups.

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“…The impact of insertion site on stability was evaluated by comparison to a control group with median inserted mini‐implants of the same size from a previous pilot study (Nienkemper et al. ).…”

mentioning

confidence: 99%

Stability of paramedian inserted palatal mini‐implants at the initial healing period: a controlled clinical study

Nienkemper

Pauls²,

Ludwig³

et al. 2013

Clinical Oral Implants Res

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Mini-implant stability at the initial healing period: A clinical pilot study

Abstract: Mini-implant stability is subject to changes during the healing process. During weeks 3 and 4, a significant decrease of the stability was observed. After 4 weeks, the stability did not change significantly.

Cited by 32 publications

References 26 publications

Evaluation of mechanical strengths of three types of mini‐implants in artificial bones

Evaluation of mechanical strengths of three types of mini‐implants in artificial bones

Insertion torque, resonance frequency, and removal torque analysis of microimplants

Stability of paramedian inserted palatal mini‐implants at the initial healing period: a controlled clinical study

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