Journal of Oral Implantology April 2013 - (Page 225)

LITERATURE REVIEW An Overview of Immediate Root Analogue Zirconia Implants K. M. Regish, MDS Deeksha Sharma, MDS D. R. Prithviraj, MDS* Owing to its excellent biomechanical characteristics, biocompatibility, and bright tooth-like color, zirconia has the potential to become a substitute for titanium as dental implant material and to be successfully used as rootanalogue implants by reproducing the contours of the extracted tooth. This article presents an overview of the technique of using root analogue zirconia dental implants as an immediate implantation material. These implants are replicas of the extracted tooth and therefore truly anatomically correct and socket friendly. Key Words: immediate implantation, root analogue implants, custom-made implants, zirconia, zirconia implants INTRODUCTION R eplacement of lost teeth using oral implants is an accepted treatment modality with well-documented longterm success rates between 90% and 100% at the 10-year follow up.1 Titanium and titanium alloys are widely used to fabricate dental implants.2 Expectations regarding esthetics in dentistry are growing, and research in the field of all-ceramic materials for restoration of natural dentition and dental implants has intensified. To improve the esthetic aspect of dental implants, a ceramic material, zirconia, was introduced.3 Originally, a healing period of 6–9 months was recommended before implant insertion (late implant placement). Later, placement of implants after only 2–3 months was proposed (delayed implant placement), and more recently, immediate implantation after extraction has been performed clinically, but only in highly selected cases. Results with shorter intervals between extraction and implantation are comparable to late implant placement.1 The major advantages of immediate implant placement Department of Prosthodontics, Govt. Dental College and Research Institute, Bangalore, Victoria Hospital Campus, Fort, Bangalore, India. * Corresponding author, e-mail: DOI: 10.1563/AAID-JOI-D-10-00208 are (1) the decrease in treatment time with fewer surgical interventions leading to an improved quality of life and overall cost reduction and (2) less alveolar bone resorption and soft-tissue regression due to early functional load.1 However, one problem associated with immediate implant placement using conventional screw- or cylinder-type implants is their incongruence with the extraction socket.2 A good fit between the implant and the host bed has been described as an important factor for implant success.4 The problem of incongruence can be rectified by using a novel approach wherein custom-made root analogue implants are placed into the extraction socket or by using largediameter implants, sometimes up to a platform of 6 or 7 mm. By adapting the root to the extraction socket instead of adapting the bone to a preformed standardized implant, bone and soft-tissue trauma are reduced.4 Zirconia-based implants were introduced into dental implantology as an alternative to titanium implants. Owing to its ability to be milled into the shape of the natural tooth root and be placed immediately after extraction, its excellent biomechanical characteristics, its biocompatibility, and its bright tooth-like color, zirconia has the potential to become a substitute for titanium as dental implant material.2 Journal of Oral Implantology 225

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

Evidence-Based Practice or Practice-Based Evidence?
Evaluation of Optimal Taper of Immediately Loaded Wide-Diameter Implants: A Finite Element Analysis
A Prospective, Randomized Controlled Preclinical Trial to Evaluate Different Formulations of Biphasic Calcium Phosphate in Combination With a Hydroxyapatite Collagen Membrane to Reconstruct Deficient Alveolar Ridges
Retention of Implant-Supported Overdenture With Bar/Clip and Stud Attachment Designs
The Clinical and Histologic Outcome of Dental Implant in Large Ridge Defect Regenerated With Alloplast: A Randomized Controlled Preclinical Trial
Fluoride-Treated Bio-Resorbable Synthetic Hydroxyapatite Promotes Proliferation and Differentiation of Human Osteoblastic MG-63 Cells
Resonance Frequency Analysis of 208 Straumann Dental Implants During the Healing Period
A Simplified Technique for Solving the Transfer Problem of Implant-Supported Fixed Partial Dentures for Patients With Microstomia
Esthetic Evaluation of Single-Tooth Morse Taper Connection Implants Placed in Fresh Extraction Sockets or Healed Sites
A Technique for Improving the Retention of Dentures Retained by Ramus Frame Implants
Treatment of Congenitally Missing Maxillary Lateral Incisors: An Interdisciplinary Approach
Use of Titanium Mesh in Lieu of a Fixation Screw to Stabilize an Autogenous Block Graft: A Case Report
A Novel Approach to Preserve the Buccal Wall in Immediate Implant Cases: A Clinical Report
Implant Failure Associated With Actinomycosis in a Medically Compromised Patient
Replacement of Mandibular Posterior Teeth With Implants in a Postmandibular Resection Case: A Case Report
Zygomatic Implants/Fixture: A Systematic Review
An Overview of Immediate Root Analogue Zirconia Implants
Letter to the Editor
Reviews of Current Literature

Journal of Oral Implantology April 2013