Journal of Oral Implantology October 2013 - (Page 583)

RESEARCH Influence of Surface Nano-Roughness on Osseointegration of Zirconia Implants in Rabbit Femur Heads Using Selective Infiltration Etching Technique Moustafa N. Aboushelib, PhD, MSc, DDS Noha A. Salem, MSc, DDS* Ahmed L. Abo Taleb, MSc, DDS Naglaa M. Abd El Moniem, MSc, DDS This study evaluates osseous healing of selective infiltration-etched (SIE) zirconia implants compared to assintered zirconia and titanium implants. Twenty implants of each group were inserted in 40 adult New Zealand white male rabbits. After 4 and 6 weeks, bone blocks containing the implants were retrieved, sectioned, and processed to evaluate bone-implant contact (BIC) and peri-implant bone density. SIE zirconia implants had significantly higher BIC and marginally higher bone density. The results suggest that selective infiltration-etched zirconia implant surface may improve implant osseointegration. Key Words: selective-infiltration-etching, zirconia implants, peri-implant bone density, bone-implant contact, nano-technology, osseointegration INTRODUCTION S ince their introduction, dental implants have been accepted as a predictable and reliable treatment modality for the rehabilitation of both partially and completely edentulous patients. Success of dental implants depends mainly on osseointegration of the implant into the host bone. Implant integration is greatly influenced by the properties of the implant surface (such as topography and chemistry). A wide range of surface modifications have been developed to improve and accelerate osseous healing of dental implants and to increase the strength and resistance of the bone-implant interface to longterm functional loading.1–3 Titanium and titanium alloys are the most commonly used dental implant materials, due to their excellent biocompatibility. Their high success Dental Biomaterials Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt. * Corresponding author, e-mail: Noha_salem@live.com DOI: 10.1563/AAID-JOI-D-11-00075 and survival rates have been confirmed in different applications in the oral cavity. However, the main disadvantage of titanium implants is its dark grayish color that may lead to esthetic impairment with unfavorable soft tissue response or thin gingival biotype.4 Zirconia offers a promising alternative as a dental implant material, due to its tooth-like color and ability to transmit light, which makes it superior in esthetically critical areas of the oral cavity. Zirconia also possesses excellent mechanical properties represented mainly by high fracture resistance and flexural strength.5,6 This is mostly due to the transformation of zirconia tetragonal particles into monoclinic ones, accompanied by a simultaneous 4% expansion in volume, which interrupts the propagation of a crack or a flaw and prevents fracture of the material under stress.7,8 In addition, it exhibits high values of bending strength and a relatively low modulus of elasticity indicating a higher elastic deformation capability.9 Zirconia also has good chemical and dimensional stability and excellent resistance to corrosion and wear.10 Zirconia is considered to be a highly biocompatible Journal of Oral Implantology 583

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

Food and Drug Administration: Reclassification of Blade Form Dental Implants
Optimizing Platelet-Rich Plasma Gel Formation by Varying Time and Gravitational Forces During Centrifugation
Effect of Surface Roughness and Low-Level Laser Therapy on Removal Torque of Implants Placed in Rat Femurs
Impression Techniques for Multiple Implants: A Photoelastic Analysis. Part I: Comparison of Three Direct Methods
Impression Techniques for Multiple Implants: A Photoelastic Analysis. Part II: Comparison of Four Acrylic Resins
A Pig Model for the Histomorphometric Evaluation of Hard Tissue Around Dental Implants
In Situ Tooth Replica Custom Implant: A 3-Dimensional Finite Element Stress and Strain Analysis
Influence of Different Soft Liners on Stress Distribution in Peri-Implant Bone Tissue During Healing Period. A 3D Finite Element Analysis
Influence of Surface Nano-Roughness on Osseointegration of Zirconia Implants in Rabbit Femur Heads Using Selective Infiltration Etching Technique
Modified Titanium Surfaces Alter Osteogenic Differentiation: A Comparative Microarray- Based Analysis of Human Mesenchymal Cell Response to Commercial Titanium Surfaces
Hemorrhage Secondary to Interforaminal Implant Surgery: Anatomical Considerations and Report of a Case
Rehabilitation of a Patient With Mandibular Resection Using Osteointegrated Implants: A Case Report
Two-Stage Bone Expansion Technique Using Spear-Shaped Implants Associated With Overlapped Flap: A Case Report
Implant Esthetic Restoration in Ridge Deficiencies in Cases of Trauma: A Case Report
Rehabilitation of the Atrophic Maxilla With Tilted Implants: Review of the Literature

Journal of Oral Implantology October 2013