Biomechanical aspects of initial intraosseous stability and implant design: a quantitative micro‐morphometric analysis

Akça, Kıvanç; Chang, Ting-Ling; Tekdemi̇r, İbrahi̇m; Fanuscu, Mete I.

doi:10.1111/j.1600-0501.2006.01265.x

Cited by 90 publications

(79 citation statements)

References 22 publications

(31 reference statements)

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“…However, the results also depend of the bone quality, site of implant placement and surgical technique. Alsaadi [42]. In our study, the dense bone quality exhibited the highest torque placement with 50 Ncm.…”

Section: Discussionmentioning

confidence: 73%

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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Section: Discussionmentioning

confidence: 73%

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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“…During placement of osseointegrated implants, the insertion torque may result in varied levels of compressive stresses transmitted to the adjacent bone, given that the implant bed is slightly narrower than the diameter of the implant to be placed in order to optimize primary stabilization (9,10). Clinical studies have demonstrated a close relationship between initial stabilization and the success of an osseointegrated implant (11)(12)(13), which can be measured by the insertion torque during implant placement (12). The insertion torque must exceed 30 Ncm to obtain predictable success rates (12,14), aiming at avoiding implant micromovement and consequent connective tissue formation (6,13).…”

Section: Introductionmentioning

confidence: 99%

Influence of high insertion torque on implant placement: an anisotropic bone stress analysis

et al. 2010

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The aim of this study was to evaluate the influence of the high values of insertion torques on the stress and strain distribution in cortical and cancellous bones. Based on tomography imaging, a representative mathematical model of a partial maxilla was built using Mimics 11.11 and Solid Works 2010 softwares. Six models were built and each of them received an implant with one of the following insertion torques: 30, 40, 50, 60, 70 or 80 Ncm on the external hexagon. The cortical and cancellous bones were considered anisotropic. The bone/implant interface was considered perfectly bonded. The numerical analysis was carried out using Ansys Workbench 10.0. The convergence of analysis (6%) drove the mesh refinement. Maximum principal stress (σ max ) and maximum principal strain (ε max ) were obtained for cortical and cancellous bones around to implant. Pearson's correlation test was used to determine the correlation between insertion torque and stress concentration in the periimplant bone tissue, considering the significance level at 5%. The increase in the insertion torque generated an increase in the σ max and ε max values for cortical and cancellous bone. The σ max was smaller for the cancellous bone, with greater stress variation among the insertion torques. The ε max was higher in the cancellous bone in comparison to the cortical bone. According to the methodology used and the limits of this study, it can be concluded that higher insertion torques increased tensile and compressive stress concentrations in the periimplant bone tissue.

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“…A polyurethane block (Polyurethane F16 Axson, Cercy -France) was made in the metal matrix (95 x 45 x 20 mm 3) , that similar to the matrix found in the literature 26 . Polyurethane has an elastic modulus of 3.6 GPa, which is similar to the elastic modulus of bone tissue.…”

Section: Fabrication Of the Master Modelmentioning

confidence: 99%

“…The longevity of implant-supported dental prostheses is obtained by stability, passive fit of prosthetic infrastructures on the implant connections [1][2][3]. The absence of satisfactory fit induces the irregular distribution of masticatory loads, resulting in deformation of the adjacent bone tissue3 and of the prosthetic components [4][5], compromising the therapeutic success of the implant and its components [6].…”

Section: Introductionmentioning

confidence: 99%

Microdeformation of Infrastructure for Implant-Supported fixed Dental Prosthesis by Strain-Gauge Method: Influence of Technique and Material Impression

Tonetto¹,

Ebrahim²,

Nogueira³

et al. 2015

Pesqui. bras. odontopediatria clín. integr.

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Objective: To verify the structural microdeformation by strain gages, around implants that have metal infrastructure, obtained by different materials and techniques impressions. Material and Methods: Three internal hexagon implants in polyurethane block (master model) with abutments were taken the impression with differents materials and techniques impression (n=4): addition silicon and transfer for open tray technique (Group I), condensation silicon and transfer for closed tray technique (Group II); and polyether and transfer for open tray techniques (Group III). Impressions were poured with type IV stone. Metallic infrastructure were made and installed in the master model by an aid of a manual ratchet wrench. A torque of 20N was used to install the metallic infrastructure. Microdeformation analysis was performed around the implants by strain gauge method. Two gauges were inserted into the polyurethane base, and three measurements were taken for each infrastructure. Data were analyzed using descriptive statistics and inference. Kruskal-Wallis test was used to verify association between materials and impression techniques and deformation around the implants, at 5% confidence. Results: Microdeformations around the implants showed no statistically significant difference (p = 0.123) between the experimental groups, Group I (215.8 µε), Group II (194.9 µε) and Group III (297.4 µε). Conclusion: The use of different materials and techniques impression to made of infrastructures for fixed implant-supported dental prosthesis did not present difference in microdeformation values around implants.

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Biomechanical aspects of initial intraosseous stability and implant design: a quantitative micro‐morphometric analysis

Abstract: Bone micro-morphology has a prevailing effect over implant design on intraosseus initial implant stability, and ITV is more sensitive in terms of revealing biomechanical properties at the bone-implant interface in comparison with ISQ.

Cited by 90 publications

References 22 publications

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

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

Influence of high insertion torque on implant placement: an anisotropic bone stress analysis

Microdeformation of Infrastructure for Implant-Supported fixed Dental Prosthesis by Strain-Gauge Method: Influence of Technique and Material Impression

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