Primary Stability of a Hybrid Self-Tapping Implant Compared to a Cylindrical Non-Self-Tapping Implant with Respect to Drilling Protocols in an Ex Vivo Model

Toyoshima, Takeshi; Wagner, Wilfried; Klein, Martine; Stender, E.; Wieland, Marco; Al‐Nawas, Bilal

doi:10.1111/j.1708-8208.2009.00185.x

Cited by 58 publications

(52 citation statements)

References 31 publications

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“…In 2012, Park et al [27] obtained the maximum insertion torque, angular momentum, and total insertion energy by torque curves, although quantitative analyses on whether torque curves were correlated with implant designs were not conducted. Furthermore, most conventional studies on torque have focused on measurement [28–31] of the maximum torque value and/or RT at the time of IT or the relationship between the RFA value and IT and/or RT [6, 13, 16, 18, 32]. The present study was not limited to measurements of IT and RT, as the characteristics of the torque curves were divided into four areas designated as the initial, parallel, tapered, and platform areas, and quantitative analyses were performed for each area.…”

Section: Discussionmentioning

confidence: 99%

Effect of implant design on primary stability using torque-time curves in artificial bone

et al. 2015

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BackgroundPrimary stability following implant placement is essential for osseointegration and is affected by both implant design and bone density. The aim of this study was to compare the relationships between torque-time curves and implant designs in a poor bone quality model.MethodsNine implant designs, with five implants in each category, were compared. A total of 90 implants (Straumann: Standard RN, Bone Level RC, Tapered Effect RN; Nobel Biocare: Brånemark MKIII, MKIV) were placed in type IV artificial bone. Torque-time curves of insertion and removal were recorded at the rate of 1000 samples/s by a torque analyzer.ResultsThe torque-time curves were divided into initial, parallel, tapered, and platform areas. The mean torque rise rate of the parallel area was smallest at 0.36 N · cm/s, with a significant difference from those of the other areas (p < 0.05). Values of 2.14, 2.33, and 2.65 N · cm/s were obtained for the initial, tapered, and platform areas, respectively. The removal torque for six of the implant designs (Bone Level RC 8, 10, and 12 mm; Tapered Effect RN 10 mm; Brånemark MKIII 10 mm, MKIV 10 mm) was significantly smaller than the corresponding insertion torque (p < 0.05). However, the removal torque for ST6, 8, and 10 was almost the same as or slightly greater than the corresponding insertion torque.ConclusionsThe insertion torque-time curves and design features of the implants were accurately transferred. Increasing implant taper angle appeared to increase the torque rate. Torque was mainly generated from the superior surface to the valley of the thread and the inferior and axial surfaces of the platform, while the inferior and axial surfaces of the thread did not significantly affect torque generation.

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Section: Discussionmentioning

confidence: 99%

Effect of implant design on primary stability using torque-time curves in artificial bone

et al. 2015

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“…The success rate for osseointegration of dental implants was shown to be very high for many different designs and brands of implants [3][4][5]. Primary stability, which is one of the most important criteria of implant integration and success rate in the early healing phase, depends mainly on the enosseous design of the implant (length, diameter, shape, and thread) besides the surgical technique, volume, and mechanical quality of local bone [3,4]. During the osseointegration period, bone gradually remodels to the implant threads and thus the secondary stability is attained by direct bone to implant contact [5].…”

Section: Introductionmentioning

confidence: 99%

“…According to the literature, more than 1,300 types of dental implants are available, in different materials, shapes, sizes, lengths, with different surface characteristics or coatings [2]. The success rate for osseointegration of dental implants was shown to be very high for many different designs and brands of implants [3][4][5]. Primary stability, which is one of the most important criteria of implant integration and success rate in the early healing phase, depends mainly on the enosseous design of the implant (length, diameter, shape, and thread) besides the surgical technique, volume, and mechanical quality of local bone [3,4].…”

Section: Introductionmentioning

confidence: 99%

Early outcome of an implant system with a resorbable adhesive calcium–phosphate coating—a prospective clinical study in partially dentate patients

Palarie¹,

Bicer²,

Lehmann³

et al. 2011

Clin Oral Invest

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This study aims to investigate the early outcome of a dental implant with bioactive calcium-phosphate (CaP) coating in the first year of usage in different clinical indications in partially edentulous patients, after early and delayed prosthetic loading. Therefore, in a prospective follow-up study, the cumulative survival and success rate of a conical, self-drilling and self-tapping implant system after 6 months and 1 year post-insertion was evaluated. A total of 311 CaP-coated implants were placed in 124 patients. Seventy-two implants in clinical high-quality bone situation were loaded after 2 weeks post-insertion with the definite restoration; the rest after 6 months. The indication for implant placement was treatment of partial dentate mandible and maxilla. One hundred sixty-three implants were placed in the posterior mandible, 117 in the posterior maxilla. In the frontal maxilla, 25 implants and in the frontal mandible, eight implants were used. In 126 cases (36%), bone augmentation procedures (guided bone regeneration and sinus lift) were performed concomitant with implant placement. The difference between primary and secondary stability (implant stability quotient (ISQ), Periotest, insertion torque), peri-implant clinical parameter as well as survival and success criteria were evaluated. In total, ISQ mean values after 6 months were higher than after implant placement. Periotest values increased in the period of the first 6 months and remained constant afterwards. After 6 months of insertion, the mean bone loss was 0.051 mm. After 12 months, a bone gain with a mean of +0.016 mm was observed; implants in the posterior maxilla showed significant less bone resorption than implants in the posterior mandible (p < 0.0001). In the most of the implants (74%), clinical normal gingival tissue could be observed. In 24%, a mild inflammation was analysed. In 35 implants, a provocation of peri-implant bleeding was possible. In the early loading group, no implant failure was seen. Altogether, one implant in D4 bone has been lost. The cumulative survival rate summed up to 99.7%. In general, implant success assessment analysis according to Albrektsson and Buser displayed success in 99.7% of the implants. With respect to the patient selection including 124 implants with minor and major augmentations as well as early loading prosthetic function, the 1-year clinical use of the studied implant system with CaP coating showed good results, comparable to that of conventional implants without a specific coating. After 1 year, neither special disadvantages nor benefits of CaP-coated implants could be evaluated. Long-term results are further needed.

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“…12 In this context, recent studies have shown that in order to induce controlled compression forces in the cortical bone layer during implant insertion, a new hybrid auto-implant has been specifically designed for use in critical-quality bone, which combines the advantages of a conical implant with those of a cylindrical shape. 13 Considering the increase in the complexity of the cases in oral rehabilitations, modifications in the macro-geometry in implants should seek to favor their insertion, promoting the cut and bone compaction to increase their primary stability. 14 This is of extreme importance for regions where there is low bone height and quality, where implant interlocking can be compromised.…”

mentioning

confidence: 99%

“…15 The development of implants with self-drilling apices plays the role of bone shear and compression and may influence the primary stability of the implant, favoring the success of the treatment. 13 To increase the primary stability and osseointegration of dental implants, new implant designs have been developed. Jo and Hobo 16 have shown that implants with their apical portion expanded through a screw can present success rates comparable to conventional implants.…”

mentioning

confidence: 99%

Evaluation of primary stability in modified implants: Analysis by resonance frequency and insertion torque

Sciasci

Casalle

Vaz

2018

Clin Implant Dent Rel Res

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Primary Stability of a Hybrid Self-Tapping Implant Compared to a Cylindrical Non-Self-Tapping Implant with Respect to Drilling Protocols in an Ex Vivo Model

Abstract: Hybrid self-tapping implants could achieve a high primary stability which predicts them for use in low-density bone. However, there is still a debate to clarify the influence of under-dimensioned drilling on primary stability.

Cited by 58 publications

References 31 publications

Effect of implant design on primary stability using torque-time curves in artificial bone

Effect of implant design on primary stability using torque-time curves in artificial bone

Early outcome of an implant system with a resorbable adhesive calcium–phosphate coating—a prospective clinical study in partially dentate patients

Evaluation of primary stability in modified implants: Analysis by resonance frequency and insertion torque

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