Bruxism and Abutment-screw Loosening in Dental Implants

2018 ◽  
Vol 8 (3) ◽  
pp. 69-70
Keyword(s):  
Dental Implants ◽  
Screw Loosening ◽  
Abutment Screw

The Effect of Abutment Screw Length on Screw Loosening in Dental Implants with External Abutment Connections After Thermocycling

2014 ◽  
Vol 29 (1) ◽  
pp. 59-62 ◽  
Author(s):  
In-Sung Yeo ◽  
Joo-Hee Lee ◽  
Tae-Joo Kang ◽  
Seong-Kyun Kim ◽  
Seong-Joo Heo ◽  
...  
Keyword(s):  
Dental Implants ◽  
Screw Loosening ◽  
Screw Length ◽  
Abutment Screw

Production of a Piece of Custom-Made Abutment Screwdriver: Technique and Case Report

2019 ◽  
Vol 45 (2) ◽  
pp. 133-138
Author(s):  
Hasan Kocaağaoğlu ◽  
Haydar Albayrak ◽  
Zekeriya Taşdemir ◽  
Sezgi Cinel Sahin ◽  
Mustafa Zortuk
Keyword(s):  
Case Report ◽  
Production Method ◽  
Clinical Report ◽  
Screw Loosening ◽  
Custom Made ◽  
Abutment Screw

Crown fractures, framework fractures, and abutment screw loosening or screw fracture are examples of mechanical implant failures. Abutment screw loosening is a serious problem that can result in abutment screw fractures. This clinical report describes the production method of a custom-made abutment screwdriver piece for a patient with abutment screw loosening.

scholarly journals The Evolution of External and Internal Implant–Abutment Connections: A Review

2012 ◽  
Vol 2 (2) ◽  
pp. 37
Author(s):  
D.R. Prithviraj ◽  
Ninad Muley ◽  
Vikas Gupta
Keyword(s):  
Native Speakers ◽  
Screw Loosening ◽  
Implant Abutment ◽  
Primary Determinant ◽  
Native Speakers Of English ◽  
Over Time ◽  
Abutment Screw

A study of the implant–abutment connection is of great importance because it is the primary determinant of the strength and stability of an implant-supported restoration, which, in turn, determines the restoration’s prosthetic stability. Traditionally, Brånemark’s external hexagon has been used, but significant complications, such as abutment screw loosening, rotational misfit at the implant–abutment interface, and microbial penetration have led to modification of the external hexagon and the development of internal implant–abutment connections. In this review, we describe various implant–abutment connections that have evolved over time from the traditional external hexagon.  How to cite this article: Alharissy M, Dayoub S. The Evolution of External and Internal Implant–Abutment Connections: A Review. Int Dent Res 2012;2:37-42. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals In Vitro Evaluation of Manual Torque Values Applied to Implant-Abutment Complex by Different Clinicians and Abutment Screw Loosening

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Onur Dincer Kose ◽  
Burcin Karataslı ◽  
Sabit Demircan ◽  
Taha Emre Kose ◽  
Erhan Cene ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Optical Microscope ◽  
Control Group ◽  
Screw Loosening ◽  
Loading Test ◽  
Torque Wrench ◽  
Implant Abutment ◽  
Torque Values ◽  
Abutment Screw

Preload is applied to screws manually or using a torque wrench in dental implant systems, and the preload applied must be appropriate for the purpose. The aim of this study was to assess screw loosening and bending/torsional moments applied by clinicians of various specialties following application of manual tightening torque to combinations of implants and abutments. Ten-millimeter implants of 3.7 and 4.1 mm diameters and standard or solid abutments were used. Each group contained five implant-abutment combinations. The control and experimental groups comprised 20 and 160 specimens, respectively. Implants in the experimental group were tightened by dentists of different specialties. Torsional and bending moments during tightening were measured using a strain gauge. Control group and implants with preload values close to the ideal preload were subjected to a dynamic loading test at 150 N, 15 Hz, and 85,000 cycles. The implants that deformed in this test were examined using an optical microscope to assess deformities. Manual tightening did not yield the manufacturer-recommended preload values. Dynamic loading testing suggested early screw loosening/fracture in samples with insufficient preload.

Maxillary Single-tooth Replacement Utilizing a Novel Ceramic Restorative System: Results to 30 Months

10.1563/805.1 ◽  
2006 ◽  
Vol 32 (4) ◽  
pp. 190-199 ◽  
Author(s):  
Zeev Ormianer ◽  
Guido Schiroli
Keyword(s):  
Soft Tissue ◽  
Zirconia Ceramic ◽  
Tooth Replacement ◽  
Screw Loosening ◽  
Single Tooth ◽  
Patient Reported ◽  
Ceramic Restorations ◽  
Abutment Screw

Abstract This study reports on the first longitudinal results of an alumina (70%)-zirconia (30%) ceramic restorative system for implant-supported, single-tooth replacement in the anterior maxillary jaw. Eighteen patients (9 men, 9 women, mean age = 42.4 years) were treated with 22 implants placed into 19 extraction sockets and 3 residual ridges. Eight implants were immediately loaded with nonoccluding provisional prostheses. All implants were definitively loaded with fully occluding ceramic restorations after osseointegration and soft tissue maturation. Patients were monitored from 7 to 30 months (mean = 18.1 months) after loading. All implants osseointegrated and were successfully restored. One case of abutment screw loosening occurred because of patient parafunction (bruxing), and another patient reported chewing pain attributed to malocclusion. Both problems were successfully resolved without further incidence. Within the context of this study, single-tooth replacement in the anterior maxillary jaw was successfully achieved with alumina-zirconia ceramic single-tooth restorations with up to 30 months of clinical function.

scholarly journals Effect of Mechanical Cycling on Screw Torque in External Hexagon Implants with and without Platform Switching

2015 ◽  
Vol 26 (3) ◽  
pp. 284-287 ◽  
Author(s):  
Bruno Andrade Cantharino de Carvalho ◽  
Eduardo Vedovatto ◽  
Paulo Sérgio Perri de Carvalho ◽  
José Vitor Quinelli Mazaro ◽  
Rosse Mary Falcón-Antenucci
Keyword(s):  
In Vitro Study ◽  
Screw Loosening ◽  
Removal Torque ◽  
Tukey Test ◽  
Reverse Torque ◽  
Mechanical Cycling ◽  
Significant Difference ◽  
Platform Switching ◽  
Abutment Screw

This in vitro study evaluated the effect of mechanical cycling on the torque of retaining screw in external hexagon implants with platform switching (PS), regular platform (RP) and wide platform (WP). A total of 30 specimens were equally divided into 3 groups: PS, PR and WP. Each specimen was prepared with implants: 3.75 x 10 mm for RP group and 5.0x10 mm for PS and WP groups and its respective abutment with 32 Ncm torque. All groups were subjected to 106 cycles with 100 N (corresponding to about 40 months of chewing). The results were obtained with the reverse torque of each specimen and data were evaluated using ANOVA and Tukey test (p<0.05). The PS group showed statistically significant difference in screw removal torque (30.06±5.42) compared with RP (23.75±2.76) and WP (21.32±3.53) (p<0.05) groups; the RP and WP groups showed no statistically significant difference between them. It was concluded that the PS group showed higher reverse torque value, suggesting lower susceptibility of the abutment screw loosening.

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