Biomechanical aspects of marginal bone resorption around osseointegrated implants: considerations based on a three‐dimensional finite element analysis

Kitamura, Eriko; Stegaroiu, Roxana; Nomura, Sadahiro; Miyakawa, Osamu

doi:10.1111/j.1600-0501.2004.01022.x

Cited by 207 publications

(153 citation statements)

References 46 publications

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“…Increased strain at the distal side of the implant loading side has been reported in several in vitro studies using parallel (30,37,39) and inclined (40) implants. Furthermore, the increased strain observed on the lingual surface of the vertically oriented implant at the nonloading side in this study is consistent with another investigation (41), in which the authors reported increased lingual stresses near the implant neck. The upper edges of the cortical bone demonstrated a tendency to be displaced inward within the horizontal plane.…”

Section: Discussionsupporting

confidence: 82%

Peri-implant strain around mesially inclined two-implant-retained mandibular overdentures with Locator attachments

2017

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This study aimed to evaluate the periimplant strain around mesially inclined implants used to retain mandibular overdentures with Locator resilient attachments. Four mandibular edentulous acrylic resin models received two implants in the canine areas with 0°, 5°, 10°, and 20° mesial inclinations. Overdentures were connected to the implants using Locator attachments. Pink nylon inserts (light retention) were used for all implant inclinations, and red inserts were used for 20° inclination (20°red). Four strain gages were bonded on the mesial (M), distal (D), buccal (B), and lingual (L) surfaces of each implant. Peri-implant strains were measured during bilateral and unilateral loading. The 20° inclination showed the highest strain, followed by 10° and 5°, and both 0° and 20°red presented with the lowest strain. Site D was associated with the highest strain, followed by M, B, and L, which showed the lowest strain values. Unilateral loading and the loading side presented with significantly higher strain values than bilateral loading and the nonloading side, respectively. Hence, in this study, strains around the two-implant-retained overdentures with Locator attachments increased with increases in mesial implant angulation, except when red male inserts were used.

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Section: Discussionsupporting

confidence: 82%

Peri-implant strain around mesially inclined two-implant-retained mandibular overdentures with Locator attachments

2017

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“…When pathological overloading occurs (over 4,000 microstrain), strain gradients exceed the physiological limits of the bone, which may cause micro-fractures at the bone-implant interface, and bone resorption 47) . The increased strain at lingual and buccal surfaces on the loading side during first premolar loading concurred with another investigation 48) in which the authors reported that the upper edges of the cortical bone plate had the potential tendency to be displaced inward and outward in the horizontal plane. They added that the presence of the rigid implant hindered these displacements and led to the occurrence of compressive and tensile stresses on the lingual and buccal sides of upper edges respectively.…”

Section: Discussionsupporting

confidence: 74%

The effect of implant diameter on strain around implants retaining a mandibular overdenture with Locator attachments: An <i>in vitro</i> study

2016

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This study evaluated the effect of implant diameter on strain around implants retaining mandibular overdentures with Locator attachments. Three mandibular acrylic resin models were constructed with 2 implants inserted in canine areas and classified according to implant diameter into 3 groups: large (4.2 mm), medium (3.7 mm), and small (3.3 mm) diameter implants. Duplicate dentures were connected to the implants with Locator attachments. Four strain gauges were bonded to the acrylic resin at mesial, distal, buccal and lingual surfaces of each implant and strain was measured at loading and non-loading sides during 1st premolar and 1st molar loading. Small and large diameter implants recorded the highest and the lowest strain, respectively. Buccal and lingual sites recorded the highest strain, and mesial site recorded the lowest. First premolar loading recorded significant higher strain than first molar loading. The largest possible implant diameter is recommended to minimize strains around implants retaining mandibular overdentures with Locator attachments.

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“…The biomechanical aspects are important in the evaluation of the risk of bone resorption that affects the stability efficiency of the prosthesis over time (1). After implant insertion and its subsequent initial loading, crestal bone undergoes remodelling and resorption (2).…”

Section: Introductionmentioning

confidence: 99%

The influence of platform switching on the biomechanical aspects of the implant-abutment system. A three dimensional finite element study

et al. 2011

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Objective: To evaluate the biomechanical scenario of platform switching geometric implant-abutment configuration relative to standard configurations by means of finite element analysis. Study Design: A 3D Finite Element Analysis (FEA) was performed on 3 different implant-abutment configurations: a 3.8 mm implant with a matching diameter abutment (Standard Control Design, SCD), a 5.5 mm implant with matching diameter abutment (Wider Control Design, WCD), and a 5.5mm implant with a 3.8 mm abutment (Experimental Design, ED). All the different experimental groups were discretized to over 60000 elements and 100000 nodes, and 130N vertical (axial) and 90N horizontal loads were applied on the coronal portion of the abutment. Von Mises stresses were evaluated and maximum and minimum values were acquired for each implantabutment configuration. Results: The load-induced Von Mises stress (maximum to minumum ranges) on the implant ranged from 150 MPa to 58 Pa (SCD); 45 MPa to 55 Pa (WCD); 190 MPa to 64 Pa (ED). The Von Mises stress on the abutment ranged from 150 MPa to 52 MPa (SCD); 70 MPa to 55 MPa (WCD), and 85 MPa to 42 MPa respectively (ED). The maximum stresses transmitted from the implant-abutment system to the cortical and trabecular bone were 67 Pa and 52 MPa (SCD); 54 Pa and 27 MPa (WCD); 64 Pa and 42 MPa (ED), respectively. When the implant body was evaluated for stresses, a substantial decrease in their levels were observed at the threaded implant region due to the diametral mismatch between implant and abutment for the ED configuration. Conclusion: The platform switching configuration led to not only to a relative decrease in stress levels compared to narrow and wide standard configurations, but also to a notable stress field shift from bone towards the implant system, potentially resulting in lower crestal bone overloading.

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Biomechanical aspects of marginal bone resorption around osseointegrated implants: considerations based on a three‐dimensional finite element analysis

Cited by 207 publications

References 46 publications

Peri-implant strain around mesially inclined two-implant-retained mandibular overdentures with Locator attachments

Peri-implant strain around mesially inclined two-implant-retained mandibular overdentures with Locator attachments

The effect of implant diameter on strain around implants retaining a mandibular overdenture with Locator attachments: An <i>in vitro</i> study

The influence of platform switching on the biomechanical aspects of the implant-abutment system. A three dimensional finite element study

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