Journal of Oral Implantology December 2012 - (Page 661)

RESEARCH Lateral Augmentation of the Maxilla and Mandible Using Framework Technique With Allogeneic Bone Grafts Phillip Wallowy, Dr.med.dent* Andreas Dorow, Dr.med, Dr.med.dent This study aimed to evaluate the effectiveness of lateral ridge augmentation in 36 patients with severely atrophic alveolar ridge using allogeneic bone grafts in a framework technique. A thinned allogeneic cortical graft was screwed to the alveolar ridge, leaving a hollow space that was filled with particulated allogeneic cortical bone. Thirty-six patients who received surgical lateral block augmentation using allogeneic bone grafts were involved in this study. Implants were placed in a second session after a mean time of 6.3 months. The surgical technique and the reasons for failure of surgery in three patients are described. Additionally, properties of allogeneic bone grafts are reviewed. In 33 patients, dental implants were successfully installed and continued to be well maintained at the last follow-up (91.7% success). In three patients, dental implants could not be installed (8.3% failure) as the graft was lost because of wound dehiscence; however, repeat surgery was successfully carried out in all three. The use of allogeneic bone grafts in lateral ridge augmentation of the maxilla and mandible showed successful clinical results. It seems to be a reliable material for reconstructing a severely atrophic alveolar ridge. It presents a good alternative to autogenous bone regarding augmentation because it offers good ossification, less morbidity, unlimited availability and shorter duration of surgery, and lower costs. Key Words: allogeneic bone grafts, dental implants, atrophic alveolar ridge, lateral ridge augmentation INTRODUCTION severely atrophied alveolar ridge is quite common in elderly patients and prevents the installation of dental implants. Implant placement requires a suitable quantity and quality of bone. Successful osseointegration of dental implants depends on sufficient bone surrounding the implant. Extensively deficient bone can be augmented in many ways and by using different kinds of bone substitute materials. A very common procedure is transplantation of autogenous bone blocks.1,2 The present golden standard is the use of autogenous bone, wherein the donor and recipient are the same person.3,4 This procedure presents osteoconductive, osteoinductive, and Private practice, Dorow-Clinic. Waldshut, Germany. * Corresponding author, e-mail: wallowy@dorow-clinic.de DOI: 10.1563/AAID-JOI-D-11-00073 A osteogenetic properties3–5 but has several disadvantages. Additional surgery is required, which is associated with corresponding risks, complications, and higher incidents of morbidity. Also, the duration of surgery is longer, and therefore the cost is higher. In most cases, using bone from the iliac crest also requires general anesthesia. In addition, autogenous bone is mostly limited.6–9 The use of allogeneic bone, that is, human donor bone, can overcome these disadvantages. The following study aims to evaluate the use of allogeneic bone grafts for lateral ridge augmentation to enable the installation of dental implants. A well-working frame technique is presented. Thinned allogeneic cortical grafts were screwed to the alveolar ridge, leaving a hollow space that was filled with particulated allogeneic cortical bone. The properties of allogeneic bone are described and reasons for failure of surgery in three patients are analyzed. Journal of Oral Implantology 661

Table of Contents for the Digital Edition of Journal of Oral Implantology December 2012

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Lateral Augmentation of the Maxilla and Mandible Using Framework Technique With Allogeneic Bone Grafts
Accuracy of Cone Beam Computerized Tomography and a Three-Dimensional Stereolithographic Model in Identifying the Anterior Loop of the Mental Nerve: A Study on Cadavers
Evaluation of Microgap Size and Microbial Leakage in the Connection Area of 4 Abutments With Straumann (ITI) Implant
Buccal Bone Plate Remodeling After Immediate Implant Placement With and Without Synthetic Bone Grafting and Flapless Surgery: Radiographic Study in Dogs
Evaluation of Soft Tissues Around Single Tooth Implants in the Anterior Maxilla Restored With Cemented and Screw-Retained Crowns
Accuracy of a Newly Developed Cone-Beam Computerized Tomography-Aided Surgical Guidance System for Dental Implant Placement: An Ex Vivo Study
Nasopalatine Canal Position Relative to the Maxillary Central Incisors: A Cone Beam Computed Tomography Assessment
Esthetics in Implant-Supported Prostheses: A Literature Review
Reliability of Implant Surgical Guides Based on Soft-Tissue Models
Clinical Evaluation of Short and Wide-Diameter Implants Immediately Placed Into Extraction Sockets of Posterior Areas: A 2-Year Retrospective Study
Single Stage Immediate Implant Placements in the Esthetic Zone
Removal of Fractured Dental Implant Screw Using a New Technique: A Case Report
Restoration of Failing Maxillary Implant-Supported Fixed Prosthesis With Cross Arch Splinted Unilateral Zygomatic Implant: A Clinical Report
Oral Rehabilitation of Severe Dentoalveolar Trauma: A Clinical Report
Implant Installation With Bone Augmentation and Transmucosal Healing With Demineralized Human Cortical Bone in the Maxillary Anterior Region: Report of 3 Cases
Bone Morphogenic Protein: An Elixir for Bone Grafting—A Review
Orthodontic Considerations in Restorative Management of Hypodontia Patients With Endosseous Implants
Squamous Cell Carcinoma in Association With Dental Implants: An Assessment of Previously Hypothesized Carcinogenic Mechanisms and a Case Report
Indirect Osteotome Maxillary Sinus Floor Elevation: An Update
Reliability of Implant Surgical Guides Based on Soft-Tissue Models: A Methodological Mistake

Journal of Oral Implantology December 2012