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The Journal of Prosthetic Dentistry Jan 2022
Topics: Ceramics; Crowns; Dental Abutments; Dental Implant-Abutment Design; Dental Implants; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Titanium; Zirconium
PubMed: 33279160
DOI: 10.1016/j.prosdent.2020.08.030 -
The International Journal of... Oct 2002The authors report on the fracture of a standard endosseous dental implant 11 years after placement. It had been connected to a natural tooth using a nonrigid connector... (Review)
Review
The authors report on the fracture of a standard endosseous dental implant 11 years after placement. It had been connected to a natural tooth using a nonrigid connector to compensate for the lack of a built-in antirotational system on the prosthetic abutment of the implant restoration. Scanning electron microscopy revealed striations on the fracture surface, suggesting a fatigue-associated failure.
Topics: Crowns; Dental Abutments; Dental Implants; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Denture Precision Attachment; Female; Follow-Up Studies; Humans; Microscopy, Electron, Scanning; Middle Aged; Rotation; Stress, Mechanical; Surface Properties
PubMed: 12449308
DOI: No ID Found -
Compendium of Continuing Education in... 2010Dental implant treatments have changed dramatically since the introduction of osseointegration in the 1970s. Placement and restoration of dental implants now are...
Dental implant treatments have changed dramatically since the introduction of osseointegration in the 1970s. Placement and restoration of dental implants now are considered to be a basic, important component of dental practices around the world. During the past several decades, there has been a significant increase in the number of dental implant manufacturers and implant restorative components available for clinicians and dental laboratory technicians treating partially edentulous patients. While the increase in components has improved the esthetic and functional results obtainable with dental implants, clinicians also have reported difficulties and confusion in treatment planning dental implant restorations for partially edentulous patients. This article introduces a protocol for implant abutment selection in partially edentulous patients undergoing dental implant treatment by describing a clinical/laboratory protocol for abutment selection in implant dentistry for implant surgeons, restorative dentists, and dental laboratory technicians.
Topics: Crowns; Dental Abutments; Dental Implants; Dental Prosthesis Design; Dental Prosthesis Retention; Dental Prosthesis, Implant-Supported; Gingiva; Humans; Jaw, Edentulous, Partially; Practice Guidelines as Topic
PubMed: 20158014
DOI: No ID Found -
The International Journal of... 2022To quantify the effect of support stiffness on the retention forces of telescopic crowns and to evaluate a prototype attachment system incorporating a nickel-titanium...
PURPOSE
To quantify the effect of support stiffness on the retention forces of telescopic crowns and to evaluate a prototype attachment system incorporating a nickel-titanium element.
MATERIALS AND METHODS
In the first part of the study, telescopic crowns were fabricated employing standard laboratory procedures. For six combinations of telescopic crowns, the separation force was determined while varying the stiffness of their supporting implants. In the second study part, an in vitro mandibular model with three interforaminal implants was equipped with strain gauges and extensometers. Two prostheses either employing cylindrical telescopic crowns or prototype attachments were fabricated and statically loaded on the model using either the midline or the left canine or both canine implants for support while strain in the peri-implant area and prosthesis displacement were recorded. Statistical analysis of both study parts was based on pairwise comparisons with the level of significance set at α = .05.
RESULTS
With one exception (P = .161), for each assembly of two telescopic crowns, the separating force was always dependent on the stiffness of the supporting implants. With 3 exceptions out of a total of 14 comparisons for peri-implant strain and prosthesis displacement, the use of the prototype attachments always led to significantly lower mean values compared to the use of cylindrical telescopes (P < .00).
CONCLUSION
The individual retention force of telescopic crowns on implants should be set at a lower level compared to telescopic crowns on natural abutments. Incorporating a nickel-titanium element into attachment systems for implant-supported removable prostheses reduces peri-implant strain and may facilitate the use of telescopic crowns.
Topics: Crowns; Dental Implants; Dental Prosthesis, Implant-Supported; Denture Retention; Denture, Overlay; Mandible
PubMed: 33651028
DOI: 10.11607/ijp.6875 -
Journal of Prosthodontics : Official... Jun 2012One of the popular designs for the distal extension partial removable dental prosthesis is the RPI clasp assembly. A modification of the RPI clasp assembly is...
One of the popular designs for the distal extension partial removable dental prosthesis is the RPI clasp assembly. A modification of the RPI clasp assembly is introduced. It incorporates a mesial rest (R), proximal plate (P), and a horizontal retentive arm (H-RPH). This clasp assembly provides benefits of the RPI clasp and can be used in clinical situations where the RPI clasp is contraindicated.
Topics: Dental Abutments; Dental Clasps; Dental Prosthesis Design; Denture Design; Denture Retention; Denture, Partial, Removable; Humans; Surface Properties
PubMed: 22726128
DOI: 10.1111/j.1532-849X.2011.00823.x -
The Journal of Prosthetic Dentistry Feb 2022A complete digital workflow to remove a cement-retained implant-supported crown by using an additively manufactured implant abutment screw-access guide is described. The...
A complete digital workflow to remove a cement-retained implant-supported crown by using an additively manufactured implant abutment screw-access guide is described. The existing cone beam computed tomography (CBCT) scan was superimposed on the digital scans of the patient, which facilitated the visualization of the implant abutment screw access and guided the design of the device. Advantages of the technique described include the precise translation of the implant abutment screw access, safe removal of the implant crown, and conservative clinical intervention.
Topics: Bone Screws; Crowns; Dental Abutments; Dental Implant-Abutment Design; Dental Implants; Dental Prosthesis, Implant-Supported; Humans
PubMed: 33423818
DOI: 10.1016/j.prosdent.2020.11.019 -
The European Journal of Esthetic... 2013
Review
Topics: Bone Remodeling; Dental Abutments; Dental Implant-Abutment Design; Dental Implantation, Endosseous; Dental Implants; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Stress Analysis; Humans
PubMed: 23712348
DOI: No ID Found -
Journal of Prosthodontics : Official... Apr 2018This article demonstrates a method to salvage an implant that has been damaged or is no longer usable because of a fractured screw that cannot be removed. In the first...
This article demonstrates a method to salvage an implant that has been damaged or is no longer usable because of a fractured screw that cannot be removed. In the first situation the patient had a Locator abutment that fractured during torqueing of the abutment. Despite the attempt to remove the fractured screw, it was not retrievable, and the internal threads of the implant were damaged in the attempt to remove the screw. Rather than removing the implant or covering it and sleeping the implant, a custom cast post was used to restore the implant to function. A second example describes a patient with a fixed implant crown. The implant was damaged during attempts to remove the fractured screw. A custom post was fabricated and cemented, and a new crown was fabricated.
Topics: Crowns; Dental Abutments; Dental Implant-Abutment Design; Dental Prosthesis Repair; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Denture, Overlay; Humans
PubMed: 27271842
DOI: 10.1111/jopr.12503 -
Mississippi Dental Association Journal 1997
Topics: Dental Implantation, Endosseous; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Denture, Partial, Fixed; Denture, Partial, Removable; Humans; Mandible
PubMed: 9573775
DOI: No ID Found -
The Journal of Oral Implantology 1993
Topics: Dental Abutments; Dental Implants; Dental Prosthesis Design; Dental Prosthesis Retention; Humans; Technology, Dental
PubMed: 8007030
DOI: No ID Found