Journal of Oral Implantology December 2013 - (Page 723)

CASE REPORT A Technique for Removal of a Fractured Implant Abutment Screw Murat Kurt, DDS, PhD ¨ Ahmet Umut Guler, DDS, PhD* ˙brahim Duran, DDS I The aim of this technique report was to present a procedure for removal of a fractured implant abutment screw. Whatever the cause, when an abutment fracture has occurred, the fractured screw segment inside the implant must be removed. The methods used by the clinicians may include the use of an endo-explorer self-made screwdriver and the use of implant repair kit available for some implant systems. The advantage of the presented method is that it may be extended to other implant systems that do not have a special repair kit and also that the technique is simple and does not require special equipment. Key Words: abutment screw, remove, fracture, dental implant INTRODUCTION T he rehabilitation of the stomatognathic system by implant-supported prostheses aims to reestablish the function of this system, preserve the dental structures, and provide longevity to the treatment.1 Although implant-supported prostheses have become a very successful treatment for completely and partially edentulous patients, some complications may occur that can lead to failure of implantsupported prostheses. These complications may include loosening or fracture of the prosthetic screw, loosening or fracture of the abutment screw, and implant fracture. Defects in implant design or material, poor design, nonpassive fit of the prosthetic framework, physiologic or biomechanical overload, occlusal trauma, and undetected screw loosening, which can be due to bruxism and malfunction, may cause these complications. The abutment screw can also fracture by fatigue.1-6 Screw-joint stability involves a number of critical factors, with 3 of the most important being (1) Department of Prosthodontics, Faculty of Dentistry, ˙stanbul I Aydın, ˙stanbul, Turkey. I * Corresponding author, e-mail: ahmetguler@aydin.edu.tr DOI: 10.1563/AAID-JOI-D-11-00017 adequate preload, (2) the precision of the fit of the mating implant components, and (3) the basic antirotational characteristics of the implant-toabutment interface. Application of the correct torque to an implant screw is translated into a preload that holds the components together.4 Whatever the cause, when an abutment fracture has occurred, the fractured screw segment inside the implant must be removed. Otherwise, the implant may remain osseointegrated but will lose its ability to retain the prosthesis, so that the existing prosthodontic restoration can no longer be used.7 The aim of this technique report was to present a procedure for removal of a fractured implant abutment screw. CASE REPORT A 54-year-old female patient with complaints regarding her lower implant-supported overdenture was referred to our department of prosthodontics. Clinical examination showed that the screw of one of the ball attachments in the area of the mandibular right canine was fractured, and the apical part of the screw remained threaded into the implant (Figure 1). After consultation with the patient, it was decided that the fractured screw should be removed, and the new ball attachment was restored. Journal of Oral Implantology 723

Table of Contents for the Digital Edition of Journal of Oral Implantology December 2013

Blade-Form Dental Implants: FDA Reclassification as a Class II Dental Implant Device
Effect of Different Storage Media on the Regenerative Potential of Autogenous Bone Grafts: A Histomorphometrical Analysis in Rabbits
Tensile Resistance of Mineralized and Demineralized Rat Bones in Different Regions (Calvarial and Femur)
Microbial Diversity of Peri-Implant Biofilms on Implant Fixed Bar and Telescopic Double Crown Attachments
Evidence-Based Techniques to Assess the Performance of Dental Implants
Influence of Platform and Abutment Angulation on Peri-Implant Bone. A Three- Dimensional Finite Element Stress Analysis
Direct Current Electric Stimulation in Implant Osseointegration: An Experimental Animal Study With Sheep
Prevalence of Sinus Augmentation Associated With Maxillary Posterior Implants
The Bactericidal Effects of an Acidified Sodium Chlorite-Containing Oral Moisturizing Gel: A Pilot Study
Influence of Fine Threads and Platform-Switching on Crestal Bone Stress Around Implant— A Three-Dimensional Finite Element Analysis
An Evaluation of the Resonance Frequency Analysis Device: Examiner Reliability and Repeatability of Readings
Histologic and Histomorphometric Assessment of Implants and Periapical Tissues When Placed in the Sockets of Extracted Teeth, Teeth With Periapical Lesions, and Healed Lesions: A Canine Study
Microbiological Aspects of Human Mandibular Subperiosteal Dental Implants
A Technique for Removal of a Fractured Implant Abutment Screw
Eight-Year Results of Site Retention of Anorganic Bovine Bone and Anorganic Bovine Matrix
A Reactive Lesion (Pyogenic Granuloma) Associated With Dental Implant: A Case Report
Twelve-Year Clinical and Radiological Results of Maxillary and Mandibular Implant- Retained Bar Overdentures Carried out on Oxidized (TiUnite) Replace Select Implants: A Clinical Case
PEEK Dental Implants: A Review of the Literature

Journal of Oral Implantology December 2013