Measurements Comparing the Initial Stability of Five Designs of Dental Implants: A Human Cadaver Study

O’Sullivan, Dominic; Sennerby, Lars; Meredith, Neil

doi:10.1111/j.1708-8208.2000.tb00110.x

Cited by 294 publications

(312 citation statements)

References 10 publications

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“…Because of its large diameter (4.1 mm), N1 required considerably high torque and force for lateral displacement consistent with previous studies. 22 In addition, both tests proved that tapered miniimplants were more stable than cylindrical ones with either single thread or double thread. 7,11 Because tapered mini-implants are wider in the neck, tighter engagement and greater contact with cortical bone is In this study, SA values were successfully computed using m-CT scans despite the complexity of the design of implants studied.…”

Section: Discussionmentioning

confidence: 99%

Stability comparison between commercially available mini-implants and a novel design: Part 1

Hong¹,

Lee²,

Webster³

et al. 2011

The Angle Orthodontist

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Objective: To compare mechanical stability among five mini-implant designs-a newly invented design and four commercially available designs that vary by shape and threading; to calculate external surface area of each design using high-resolution micro-computed tomography; and to evaluate the relationship between surface area and stability results. Materials and Methods: The four commercially available mini-implants-single-threaded and cylindrical (SC), single-threaded and tapered (ST), double-threaded and cylindrical (DC), doublethreaded and tapered (DT)-and a new implant that is designed to engage mostly in cortical bone with shorter and wider dimensions (N1) were inserted in simulated bone with cortical and trabecular bone layers. The mechanical study consisted of torque measurements and lateral displacement tests. External surface area was computed using a 25-mm micro-CT. Results: Maximum insertion torque, maximum removal torque, and force levels for displacements were the highest in N1, followed by DT, ST, DC, and SC (a 5 .05). The surface area was largest in DT, followed by N1, ST, DC, and SC. Surface area engaged in cortical bone, however, was the greatest in N1. The surface area of mini-implants had positive correlation with stability. Conclusion: Among commercial designs, both added tapering and double threading improved stability. N1 was the most stable design within this research design. The new design has the potential to be clinically superior; it has enhanced stability and there is diminished risk of endangering nearby anatomic structures during placement and orthodontic treatment, but the design requires refinements to reduce insertion torque to avoid clinical difficulty and patient discomfort. (Angle

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Section: Discussionmentioning

confidence: 99%

Stability comparison between commercially available mini-implants and a novel design: Part 1

Hong¹,

Lee²,

Webster³

et al. 2011

The Angle Orthodontist

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“…[2][3][4][5][6] Both tests provide anchorage estimates for immediately loaded MSIs. 7 Peak insertion torque has been shown to be a significant factor in determining the holding power of screw-type implants.…”

Section: Introductionmentioning

confidence: 99%

Pitch and Longitudinal Fluting Effects on the Primary Stability of Miniscrew Implants

Brinley¹,

Behrents

Kim

et al. 2009

The Angle Orthodontist

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Objective: To test the hypotheses that pitch and fluting have no effect on the primary stability of miniscrew implants (MSIs). Materials and Methods: Maximum placement torque and pullout strength of experimental MSIs were compared with those of control MSIs with the use of synthetic and cadaver bone. MSIs with 1.00 mm pitch were compared with those with 1.25 mm and 0.75 mm pitch; MSIs with three longitudinal flutes were compared with the same MSIs without flutes. A total of 60 MSIs (15 of each design) were evaluated with synthetic bone; a split-mouth cadaver model was used to compare the three experimental designs against the 1 mm control MSIs (total of 90 MSIs). Results: The synthetic bone model showed higher placement torque and pullout strength for the 0.75 pitch than for the 1.0 mm and 1.25 mm pitch MSIs, but differences were significant (P Ͻ .05) only for pullout strength. The cadaver model showed no significant differences in placement torque or pullout strength associated with pitch. Both synthetic and cadaver bone models showed that MSIs with flutes had significantly (P Ͻ .05) higher placement torque and pullout strength. Spearman correlations between placement torque and pullout strength were statistically significant for both synthetic (r ϭ .504) and cadaver (r ϭ .502) bone. Conclusion: Within limits, decreasing MSI pitch increases pullout strength, and fluting increases both placement torque and pullout strength.

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“…The comparison among different designs of implants was examined in several studies and noticed that conical implants have a higher insertion torque than cylindrical implants 3,9 . However, checking the resonant frequency, Browers et al 1 found higher values for the cylindrical implants compared with the conical, that confirms our results.…”

Section: Discussionmentioning

confidence: 99%

“…The large number of models available in the market or the absence of manufacturer's clarification the effectiveness of the different models leave the surgeon with doubts and raise questions about design features. Implant design should be widely studied by researchers in order to increase the surface area in contact with the bone, consequently the osseointegration, bone anchorage and load distribution [9][10] .…”

Section: Introductionmentioning

confidence: 99%

Effect of implant design and bone density in primary stability

Oliscovicz¹,

Shimano²,

Marcantonio³

et al. 2013

Braz. J. Oral Sci.

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Aim: To evaluate the influence of the format and surface treatment of implants, as well as the substrate used in primary stability. Methods: Thirty-two Conexão ® implants were used: 8 conical (CC) (11.5 x 3.5 mm) and 24 cylindrical (11.5 x 3.75 mm) -8 external hexagon implants without surface treatment (MS), 8 external hexagon implants with double Porous treatment (MP), 8 internal hexagon implants with Porous treatment (CA). They were inserted in Nacional ® polyurethane in three densities (15, 20 and 40 PCF). The insertion torque (IT) (N.cm) was quantified using the digital Mackena ® torque meter, and the pullout force (PF) (N) by means of axial traction force with a 200 kg load cell, performed in a Universal Test Machine (Emic ® DL-10000) and the Tesc 3.13 software. Data were analyzed statistically by ANOVA and Tukey's test with a significance level of 5%. Results: Difference was observed between groups (p<0.05). Regarding the IT, MP and MS inserted to the substrate 40PCF showed higher values with statistically significant difference with all interactions implants x substrate; the 15 and 20PCF densities was not significant in all groups of implants. MP, MS, CC and CA did not differ significantly, even inserted in a lower density, where CC showed better IT compared with other densities. For PF, the best performance was the interaction implant CA x 40PCF substrate, showing a difference from the other implants inserted in all substrates. Conclusions: The higher bone density and cylindrical implants with surface treatment provides greater IT and PF.

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Measurements Comparing the Initial Stability of Five Designs of Dental Implants: A Human Cadaver Study

Cited by 294 publications

References 10 publications

Stability comparison between commercially available mini-implants and a novel design: Part 1

Stability comparison between commercially available mini-implants and a novel design: Part 1

Pitch and Longitudinal Fluting Effects on the Primary Stability of Miniscrew Implants

Effect of implant design and bone density in primary stability

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