Journal of Oral Implantology February 2013 - (Page 30)

RESEARCH Peri-Implant Defect Augmentation With Autogenous Bone: A Study in Beagle Dogs Asala F. Al-Sulaimani, BDS, MSc1* Sameer A. Mokeem, BDS, MSc, PhD2 Sukumaran Anil, BDS, MDS, PhD2 This study evaluates the success of immediate endosseous implants placed along with autogenous bone graft to fill the peri-implant gap. Thirty-two implants were inserted in 8 beagle dogs. The right and left lateral incisors in the maxilla and the mandible of all animals were extracted, and immediate postextraction implants were placed. In the control sites, no bone grafts or barrier membranes were used. In the contralateral experimental site, autogenous bone graft was used. The implants were retrieved with the jawbone for histomorphometric studies. The histomorphometric measurements were carried out using a computerized image analysis system. All implants were covered by compact, mature bone under examination in light microscopy. A high boneimplant contact percentage and bone density was observed at both grafted and nongrafted implant sites. The sites filled with autogenous bone graft showed a significantly higher crestal bone level and bone density compared to the nonfilled sites. The observations of the study emphasize that the filling of the peri-implant bone defects with autogenous bone grafts showed a better outcome compared to unfilled defects. Key Words: bone defect, dental implant, histometry, osseointegration, immediate dental implants, autogenous bone INTRODUCTION T he replacement of lost natural teeth by osseointegrated implants represents one of the most significant advances in dentistry. Early implantation is preferred by many surgeons to achieve long-term stability and a good esthetic result.1 Placement of titanium endosseous implants in fresh extraction sites can result in osseointegration as determined by histologic evidence of the bone closely adapted to the implant surface and lack of clinical mobility.2 Several studies have evaluated and confirmed the successful practice of placing dental implants into fresh extraction sites.3,4 Immediate placement of implants into fresh extraction sockets has the principal advantage of decreasing the overall period 1 King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia. 2 Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia. * Corresponding author, e-mail: ksucod@gmail.com DOI: 10.1563/AAID-JOI-D-10-00132 30 Vol. XXXIX /No. One /2013 required for healing. 5 In addition, immediate implant placement may reduce the resorption of the alveolar bone in the extraction area.6 However, when an implant is placed immediately into an extraction socket, it may not completely engage the walls of the socket near the crest of the alveolar ridge.7 The presence of a bone defect around an implant could promote in-growth of soft tissue and compromise osseointegration in the crestal bone area.8 When using immediate postextraction implants, it is almost always necessary to resort to osteopromoting techniques.9,10 Graft materials and barrier membranes have been used extensively when placing immediate implants.11,12 They are often used to prevent soft tissue in-growth and to allow bone-forming cells to exclusively populate osseous defects around the implants.13–16 However, complications such as exposure of the membranes are often reported.17,18 The placement of implants into fresh extraction sites with autogenous bone chips without the use of barrier membranes has been advocated by some

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

Could the Fountain of Youth Be All in Your Bones?
Vertical Bone Augmentation With Simultaneous Implant Placement Using Particulate
Evaluation of the Bone Healing Process Utilizing Platelet-Rich Plasma Activated by Thrombin
Effect of Model Parameters on Finite Element Analysis of Micromotions in Implant Dentistry
Peri-Implant Defect Augmentation With Autogenous Bone: A Study in Beagle Dogs
Would Nitric Oxide be an Effective Marker for Earlier Stages of Peri-Implant Disease? An
The Effect of Different Surface Treatments on Cement-Retained Implant-Supported
Effect of Rotating Osteotomes on Primary Implant Stability—An In Vitro Investigation
Horizontal Augmentation Through the Ridge-Split Procedure: A Predictable Surgical
The Bis-Acryl Stent
Clinical, Histological, and Histomorphometrical Analysis of Maxillary Sinus Augmentation
A Technique to Salvage a Single Implant-Supported Fixed Dental Prosthesis Having a
Ridge Expansion and Immediate Placement With Piezosurgery and Screw Expanders in
Pterygoid Implants for Maxillofacial Rehabilitation of a Patient With a Bilateral Maxillectomy
Technology in Maxillary Premolar Region: A New Strategy for Soft Tissue Management
Fracture of Anterior Iliac Crest Following Bone Graft Harvest in an Anorexic Patient: Case
A Technique for Constructing a New Maxillary Overdenture to a Nonretrievable Implant
Edentulous Maxillary Arch Fixed Implant Rehabilitation Using a Hybrid Prosthesis Made of

Journal of Oral Implantology February 2013