TITLE

The Effect of Casting Procedures on Rotational Misfit in Castable Abutments

AUTHOR(S)
Kano, Stefania C.; Binon, Paul P.; Bonfante, Gerson; Curtis, Donald A.
PUB. DATE
July 2007
SOURCE
International Journal of Oral & Maxillofacial Implants;Jul/Aug2007, Vol. 22 Issue 4, p575
SOURCE TYPE
Academic Journal
DOC. TYPE
Conference Paper
ABSTRACT
Purpose: Misfit of implant components has been linked to restorative complications such as screw loosening. Although previous studies have shown a correlation between rotational misfit and screw loosening, the impact of casting procedures on rotational misfit is lacking. The aim of this in vitro study was to evaluate the effect of casting procedures on rotational misfit of cast abutments when compared to machined titanium abutments. Materials and Methods: Forty-eight external hexagonal implants and 48 abutments were placed in 4 groups of 12 samples each: (1) machined titanium abutments, (2) premachined palladium abutments cast-on with palladium, (3) plastic burnout abutments cast with nickel chromium, and (4) plastic burnout abutments cast with cobalt chromium. Rotational misfit between the external hexagon of the implant and the internal hexagon of the abutment was measured using standardized techniques and recorded in degrees. Mean values for each group were analyzed with analysis of variance and Tukey test. Results: The mean rotational misfit was 1.21 ± 0.57 degrees for machined titanium abutments, 1.77 ± 130 degrees for cast-on abutments, 1.98 ± 0.72 degrees for cast NiCr abutments, and 2.79 ± 1.13 degrees for cast CoCr abutments. Significantly greater rotational misfit was recorded with cast CoCr abutments when compared to machined titanium abutments (P < .05). Conclusion: Rotational misfit was less than 2 degrees for all groups except for cast CoCr abutments, which demonstrated a significantly greater rotational misfit.
ACCESSION #
36967253

 

Related Articles

  • A comparative study of gold UCLA-type and CAD/CAM titanium implant abutments. Ji-Man Park; Jai-Bong Lee; Seong-Joo Heo; Eun-Jin Park // Journal of Advanced Prosthodontics;Feb2014, Vol. 6 Issue 1, p46 

    PURPOSE. The aim of this study was to evaluate the interface accuracy of computer-assisted designed and manufactured (CAD/CAM) titanium abutments and implant fixture compared to gold-cast UCLA abutments. MATERIALS AND METHODS. An external connection implant system (Mark III, n=10) and an...

  • New techniques in spark erosion: The solution to an accurately fitting screw-retained implant restoration. Rübeling, Günter // Quintessence International;Jan1999, Vol. 30 Issue 1, p38 

    How accurate is today's method of casting in the dental laboratory? Normally it is good enough. But what happens if the dental technician is confronted with an extensive restoration or has to deal with the precision of prefabricated implant abutments? In either case, he or she is headed for...

  • Analysis of Incidence and Associated Factors with Fractured Implants: A Retrospective Study. Eckert, Steven E.; Meraw, Stephen J.; Cal, Ebru; Ow, Richard K. // International Journal of Oral & Maxillofacial Implants;Sep/Oct2000, Vol. 15 Issue 5, p662 

    Osseointegrated threaded titanium screw-type implants rarely lose integration after the first year of clinical function. Implant failure can occur for other reasons, with implant fracture being one of the major reasons for late failure. The purpose of the present study was to determine the...

  • Effect of Metal Extension of Crown in the Screw Access Channel of a Posterior Implant Abutment on the Retention of Cement Retained Prosthesis. Biyani, Rashmi; Ali, Mohsin; Belles, Donald; Powers, John M. // Journal of Oral Implantology;Oct2015, Vol. 41 Issue 5, p537 

    Purpose: Reducing the height of the implant abutment due to limited interarch space decreases the surface area for retention of cemented restorations. The purpose of this in vitro study was to see whether engaging the screw access channel with metal extension compensates for the loss of...

  • An In Vitro Load Evaluation of a Conical Implant System with 2 Abutment Designs and 3 Different Retaining-Screw Alloys. Erneklint, Christian; Ödman, Per; Örtengren, Ulf; Karisson, Stig // International Journal of Oral & Maxillofacial Implants;Sep/Oct2006, Vol. 21 Issue 5, p733 

    Purpose: The aim of this in vitro study was to evaluate the load resistance in a conical implant system by comparing combinations of 2 different abutment head angles and 3 different retaining screw materials. Materials and Methods: The retaining screw materials (titanium alloy, gold alloy, and...

  • Biomechanical Repercussions of Bone Resorption Related to Biologic Width: A Finite Element Analysis of Three Implant-Abutment Configurations. Rodríguez-Ciurana, Xavier; Vela-Nebot, Xavier; Segalà-Torres, Maribel; Rodado-Alonso, Carlos; Méndez-Blanco, Víctor; Mata-Bugueroles, Marta // International Journal of Periodontics & Restorative Dentistry;2009, Vol. 29 Issue 5, p478 

    Most biomechanical studies of implant-supported restorations have not taken into account the biologic changes that occur following exposure of the implants to the oral environment. Therefore, the present finite element analysis study was designed to compare the biomechanical response of three...

  • Screw loosening of different UCLA-type abutments after mechanical cycling. Junqueira, Marcela C.; Ribeiro, Ricardo F.; L. Faria, Adriana Claudia; Macedo, Ana Paula; Almeida, Rossana P. // Brazilian Journal of Oral Sciences;Jul-Sep2013, Vol. 12 Issue 3, p228 

    Aim: To evaluate the loss of applied torque (detorque) values in cast and pre-machined abutments for external hex abutment/implant interface of single implant-supported prostheses subjected to mechanical cycling. Methods: Ten metal crowns were fabricated using two types of UCLA abutments: cast...

  • Comparison of Impression Techniques and Materials for an Implant-Supported Prosthesis. Del'Acqua, Marcelo Antonialli; Chávez, Alejandro Muñoz; Amaral, Ângela Líbia Chagas; Compagnoni, Marco Antonio; de Assis Mollo, Jr., Francisco // International Journal of Oral & Maxillofacial Implants;2010, Vol. 25 Issue 4, p771 

    Purpose: To investigate, in vitro, the dimensional accuracy of two impression techniques (squared impression copings and squared impression copings sandblasted and coated with impression adhesive) made of vinyl polysiloxane and polyether impression materials. Materials and Methods: A master cast...

  • Effects of Abutment and Screw Access Channel Modification on Dislodgement of Cement-Retained Implant-Supported Restorations. Wadhwani, Chandur; Hess, Timothy; Piñeyro, Alfonso; Kwok-Hung Chung // International Journal of Prosthodontics;2013, Vol. 26 Issue 1, p54 

    This study investigated the influence of implant abutment and screw access channel modification on the retention of copings. Titanium abutment access openings were either left open or modified by placing two vent holes 3 mm from the occlusal edge and 180 degrees apart. Access openings sealed...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics