Retrospective review of 1170 endosseous implants placed in partially edentulous jaws

Eckert, Steven E; Wollan, Peter C.

doi:10.1016/s0022-3913(98)70155-6

Cited by 160 publications

(98 citation statements)

References 6 publications

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“…Whether an implant is used following a period of undisturbed healing or immediately after placement, a number of clinical studies [1][2][3][4][5][6][7][8][9][10][11] have shown that failure of osseointegrated implants is generally not related to mechanical failure of the load-bearing artificial structure (generally titanium based), but is induced by bone weakening or loss at the periimplant region. Moreover, clinical research has documented that the incidence of implant failure in the maxillary posterior region is generally higher than in the mandibular posterior area.…”

Section: Baggi Et Almentioning

confidence: 99%

“…Moreover, clinical research has documented that the incidence of implant failure in the maxillary posterior region is generally higher than in the mandibular posterior area. [7][8][9][10][11] Bone resorption can be activated by surgical trauma or bacterial infection, as well as by overloading at the bone-implant interface. 2,[12][13][14][15] Under functional forces, overloading of periimplant bone can be induced by a shortcoming in load transfer mechanisms, primarily due to improper occlusion, prosthesis and/or implant design, and surgical placement.…”

Section: Baggi Et Almentioning

confidence: 99%

See 1 more Smart Citation

The influence of implant diameter and length on stress distribution of osseointegrated implants related to crestal bone geometry: A three-dimensional finite element analysis

Baggi

Cappelloni

Girolamo

et al. 2008

The Journal of Prosthetic Dentistry

440

305

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Numerical results suggest that implant diameter may be more effective than implant length as a design parameter to control the risk of bone overload. For a given implant in the molar region, the worst load transmission mechanisms arise with maxillary placement, and implant biomechanical behavior greatly improves if bone is efficiently preserved at the crest. Statement of problem.Load transfer mechanisms and possible failure of osseointegrated implants are affected by implant shape, geometrical and mechanical properties of the site of placement, as well as crestal bone resorption. Suitable estimation of such effects allows for correct design of implant features.Purpose. The purpose of this study was to analyze the influence of implant diameter and length on stress distribution and to analyze overload risk of clinically evidenced crestal bone loss at the implant neck in mandibular and maxillary molar periimplant regions. Material and methods.Stress-based performances of 5 commercially available implants (2 ITI, 2 Nobel Biocare, and 1 Ankylos implant; diameters of 3.3 mm to 4.5 mm, bone-implant interface lengths of 7.5 mm to 12 mm) were analyzed by linearly elastic 3-dimensional finite element simulations, under a static load (lateral component: 100 N; vertical intrusive component: 250 N). Numerical models of maxillary and mandibular molar bone segments were generated from computed tomography images, and local stress measures were introduced to allow for the assessment of bone overload risk. Different crestal bone geometries were also modelled. Type II bone quality was approximated, and complete osseous integration was assumed.Results. Maximum stress areas were numerically located at the implant neck, and possible overloading could occur in compression in compact bone (due to lateral components of the occlusal load) and in tension at the interface between cortical and trabecular bone (due to vertical intrusive loading components). Stress values and concentration areas decreased for cortical bone when implant diameter increased, whereas more effective stress distributions for cancellous bone were experienced with increasing implant length. For implants with comparable diameter and length, compressive stress values at cortical bone were reduced when low crestal bone loss was considered. Finally, dissimilar stress-based performances were exhibited for mandibular and maxillary placements, resulting in higher compressive stress in maxillary situations.Conclusions. Implant designs, crestal bone geometry, and site of placement affect load transmission mechanisms. Due to the low crestal bone resorption documented by clinical evidence, the Ankylos implant based on the platform switching concept and subcrestal positioning demonstrated better stress-based performance and lower risk of bone overload than the other implant systems evaluated. (J Prosthet Dent 2008;100:422-431) The influence of implant diameter and length on stress distribution of osseointegrated implants related to crestal bone geometry: A threedimensional fi...

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Section: Baggi Et Almentioning

confidence: 99%

Section: Baggi Et Almentioning

confidence: 99%

The influence of implant diameter and length on stress distribution of osseointegrated implants related to crestal bone geometry: A three-dimensional finite element analysis

Baggi

Cappelloni

Girolamo

et al. 2008

The Journal of Prosthetic Dentistry

440

305

View full text Add to dashboard Cite

show abstract

“…Dental implant is being allowed bone tissue to interlock with the implant and maintain its stability when mastication forces are applied. [1]- [3] The regenerative physiologic phenomenon, that allows the fixation of the implants to the patient bone, is denominated bone integration. It was discovered and defined by Branemark in the sixties, when using titanium cameras for live studies.…”

Section: Introductionmentioning

confidence: 99%

“…According to previous reports, the success rate of dental implants in the mandible and maxilla are almost 95% that it has led to its widespread clinical application. If implants are properly designed and manufactured, and if they are inserted in a bone segment characterized by good quality and quantity [1]- [3] the success of implants are being high.…”

Section: Introductionmentioning

confidence: 99%

Selection of Optimum Thread Type in Implants to Achieve Optimal Biomechanical Properties by Using 3D Finite Element Method

Arsalanloo¹,

Telchi²,

Osgouie³

2014

IJBBB

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Abstract-Using osseointegrated dental implants allows restoration of completely or partially edentulous patients and success of this technique is linked to the connection between living bone and surface of load-bearing artificial structure, generally titanium-based. Many factors affect load transfer at the bone implant interface such as the type of loading, material properties of the implant and prosthesis, implant geometry, surface structure, implant design quality and quantity of surrounding bone, and nature of bone implant interface. The bone has the best resistance upon compressive loads, and lower resistance against tensile and shear loads. On the other hand, implants are subjected to various kinds of loads. Recently, to eliminate failures, caused by the threaded root-form implants have been introduced. In this paper, it is aimed to investigate how thread types can affect the amount, type of load and biomechanical responses induced in mandible/maxilla and implant-abutment complex by a finite element method. This problem signifies due to the usage of different kinds of thread forms made by different implant manufactures. Solid models have been developed for missing upper/lower lateral incisor dental position and 26 fixture models of 5-implant systems are made in to carry out analysis of lateral Incisor tooth of human by using FEA. The results of this paper will help in understanding the way in which stresses are distributed in dental structures. Consequently, static, dynamic and fatigue behaviors of implants are investigated.Index Terms-Dental implant, kinds of threads, kinds of loads, finite element method, lateral incisor position.

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“…Endosseous dental implants are currently used to retain and/or support prostheses for restoring completely or partially edentulous patients. Whether an implant is used following a period of undisturbed healing or immediately after placement, a number of clinical studies [1]- [3] have shown that the failure of osseointegrated implants is generally not related to mechanical failure of the load-bearing artificial structure (generally titanium based), whereas implant failure associated bone weakening or loss at the peri-implant region. According to the implantation history, in 1969, brå nemark and colleagues reported a successful attempt of endosseous dental implant treatment.…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional FEA of Implants to Investigate Effects of Angle Implantation Cases in Implants Success

Arsalanloo¹,

Telchi²,

Ghaemi³

et al. 2014

IJBBB

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Abstract-Implants should be placed, paralleled to adjacent tooth and be vertically aligned with axial forces. However, in many clinical instances, achieving this may be impossible due to deficiencies in alveolar bone. Clinically, many implant cases with different angulation over the lower posterior area have been found. Therefore, implants must be placed in angled positions, complicating restoration using straight abutments but on the other hand, angled abutments have been introduced to correct such cases. As regards, the major load in the anterior region is being entered by tongue to teeth and according to particular situation of lateral incisor tooth that has low space and also height limitation due to the existence of the sinus and nerves in maxilla and mandible, respectively, therefore this study is evaluated effects of angled installation of implants and use of the angled abutment. This paper was to discover desirable installation of implant and compare the relation between design angle abutment, angled installation of implants and load distribution at the implant bone interface with vertical abutment implantation and evaluate how could decrease stress and promote better stress distribution on surrounding bone of single-unit dental implants. Therefore, 26 solid models of the lateral incisor were built up and were transferred to mesh models in FEM to perform a stress analysis. In this study, static, dynamic and fatigue behaviors of the implant are investigated.Index Terms-Dental implant, FEM, angle abutment, angled installation.

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Retrospective review of 1170 endosseous implants placed in partially edentulous jaws

Cited by 160 publications

References 6 publications

The influence of implant diameter and length on stress distribution of osseointegrated implants related to crestal bone geometry: A three-dimensional finite element analysis

The influence of implant diameter and length on stress distribution of osseointegrated implants related to crestal bone geometry: A three-dimensional finite element analysis

Selection of Optimum Thread Type in Implants to Achieve Optimal Biomechanical Properties by Using 3D Finite Element Method

A Three-Dimensional FEA of Implants to Investigate Effects of Angle Implantation Cases in Implants Success

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