Journal of Oral Implantology August 2014 - (Page 438)

RESEARCH Longitudinal Implant Stability Measurements Based on Resonance Frequency Analysis After Placement in Healed or Regenerated Bone Giorgio Deli, DDS, MD1 Vincenzo Petrone, DDS1 Valeria De Risi, DDS1 Drazen Tadic, Dr.rer.nat2 Gregory-George Zafiropoulos, DDS, Dr. Dent, Dr.Habil1* Primary stability is an indicator of subsequent osseointegration of dental implants. However, few studies have compared the implant stability among anatomical regions and bone types; thus, not enough data exist regarding the stability of implants placed in regenerated bone (RB). The present study evaluated primary and long-term stability of implants placed in RB and non-regenerated healed bone (HB). A total of 216 screw cylinder implants were placed in 216 patients (98 in HB and 118 in RB, 6 [RB6, N ¼ 68] or 12 [RB12, N ¼ 50] months after tooth extraction). Implant stability was evaluated using resonance frequency analysis (RFA) measured at the time of implant placement (E1), at the time of loading (4 months after placement, E2), and 4 months after loading (E3). Various clinically relevant measurements were obtained, such as implant diameter, length, and location, as well as bone quality. At E1, implant location, bone quality, and experimental group significantly affected implant stability (all at P , .05). At E2, implant location, diameter, length, and experimental group significantly affected implant stability (all at P , .05). At E3, bone quality, implant diameter, length, and experimental group significantly affected implant stability (all at P , .01). Stability for the RB12 group was significantly higher than all other corresponding values; further, the values did not change significantly over time. For the HB and RB6 groups, stability was significantly higher at E2 than at E1 (P , .001) and was no different between E2 and E3. Implant location, length, and experimental group were associated with these differences (all at P , .05). Compared with HB and RB6, higher implant stability may be achieved in regenerated bone 12 months post-extraction (RB12). This stability was achieved at E1 and maintained for at least 8 months. Variables such as implant length, diameter, and bone quality affected the stability differently over time. Implant stability varied in different anatomic regions and with regard to different healing processes in the bone. Key Words: dental implants, implant stability, resonance frequency analysis/RFA, regenerated bone, guided bone regeneration, socket preservation, ridge preservation, extraction socket INTRODUCTION 1 Division of Periodontology, Catholic University of Sacre Cuore, A. Gemelli University Hospital, Rome, Italy. 2 Botiss Medical, Berlin, Germany. * Corresponding author, e-mail: zafiropoulos@prof-zafiropoulos. de DOI: 10.1563/AAID-JOI-D-12-00014 438 Vol. XL /No. Four / 2014 D ental implants are a safe, reliable, and effective technique of replacing missing teeth.1-4 And, advances in the field of tissue regeneration have lead to new treatments in the field of implantology.5-7 Implant success and long-term survival are influenced by several factors: (1) the

Table of Contents for the Digital Edition of Journal of Oral Implantology August 2014

Helping, Rather Than Criticizing, a Colleague May Lead to a Lifetime of Referrals
Utilization of Ethyl Cyanoacrylate and 2-Octyl Cyanoacrylate Adhesives for Autogenous Bone Graft Fixation: Histomorphometric Study in Rats
Conventional Versus Implant-Retained Overlay Dentures: A Pilot Study of Masseter and Anterior Temporalis Electromyography
Axial Relationship Between Dental Implants and Teeth/Implants: A Radiographic Study
The Effect of Dynamic Loading on Bacterial Colonization of the Dental Implant Fixture–Abutment Interface: An In Vitro Study
Longitudinal Implant Stability Measurements Based on Resonance Frequency Analysis After Placement in Healed or Regenerated Bone
A Clinical Report on the Use of Closed-Tray, Hex-Lock-Friction-Fit Implant Impression Copings
Immediate Restoration of NobelActive Implants Placed Into Fresh Extraction Sites in the Anterior Maxilla
Clinical Study of Flap Design to Increase the Keratinized Gingiva Around Implants: 4-Year Follow-Up
Use of Subepithelial Connective Tissue Graft as a Biological Barrier: A Human Clinical and Histologic Case Report
Calvarial Autogenous Bone Graft for Maxillary Ridge and Sinus Reconstruction for Rehabilitation With Dental Implants
Staged Ridge Splitting Technique for Horizontal Expansion in Mandible: A Case Report
An Overview of Zirconia Dental Implants: Basic Properties and Clinical Application of Three Cases
Dental Gypsum Verification Jig to Verify Implant Positions: A Clinical Report
Platelet-Rich Preparations to Improve Healing. Part I: Workable Options for Every Size Practice
Platelet-Rich Preparations to Improve Healing. Part II: Platelet Activation and Enrichment, Leukocyte Inclusion, and Other Selection Criteria

Journal of Oral Implantology August 2014