Journal of Oral Implantology September 2012 - (Page 533)

CASE REPORT Bilateral Vertical Ridge Augmentation With Block Grafts and Guided Bone Regeneration in the Posterior Mandible: A Case Report ˜ Maria A. Penarrocha* Jose A. Vina Laura Maestre ˜ David Penarrocha-Oltra The aim is to describe bilateral vertical ridge augmentation with intraoral block grafts and guided bone regeneration in the posterior mandible in preparation for implant placement. A 61-year-old woman, edentulous in the posterior mandible, presented for implant rehabilitation. The radiographic study showed 3 to 6 mm of bone height from the ridge to the mandibular canal. Autogenous bone block grafts from the chin and the mandibular ramus, harvested with ultrasonics, were used to augment the alveolar ridge. To reduce resorption, the grafts were covered with particulate alloplastic material and a collagen membrane. Delayed implants were placed 6 months after vertical augmentation, and 3 months later implants were loaded with a fixed prosthesis. A temporary sensory complication occurred, but 12 months after implant loading, there were no failures. In this case report block bone grafting was a feasible option to vertically augment the alveolar ridge in the posterior mandible. Key Words: autogenous bone graft, guided bone regeneration, vertical ridge augmentation, block graft INTRODUCTION osterior mandible and vertical augmentation are a major challenge for bone block grafting because of the high degree of resorption.1 To regenerate vertical defects, block grafts, together with guided bone regeneration and distraction osteogenesis, have the most scientific evidence– based support.2 It has been demonstrated that resorption diminishes when the graft is covered; a good example was presented by von Arx and Buser,3 who performed a clinical cohort study demonstrating that an organic bovine bone mineral and a bioabsorbable collagen membrane protect autogenous block grafts from surface resorption in horizontal augmentations. Other types of materials, such as polytetrafluoroethylene membranes, have Valencia University Medical and Dental School, Valencia, Spain. * Corresponding author, e-mail: maria.penarrocha@uv.es DOI: 10.1563/AAID-JOI-D-10-00075 P been used to cover grafts, also with good clinical results but with more complications than collagen membranes.3 When reviewing the literature about implant survival in vertical augmented sites, a high range of survival rates is found (76% to 100%).4 Also, in a recent review, Aghaloo and Moy5 pointed out that implant survival may be a function of residual bone supporting the implant rather than grafted bone. The aim of this case report is to describe bilateral vertical ridge augmentation with intraoral block grafts and guided bone regeneration in the posterior mandible to facilitate placement of implants. CASE REPORT A 61-year-old female nonsmoker, edentulous in the posterior mandible, presented for implant rehabilitation. Clinical and radiographic examinations (panoramic film and computerized tomography) showed severe vertical mandibular atrophy (3 to 6 Journal of Oral Implantology 533

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

American Academy of Implant Dentistry Foundation Supports Basic and Clinical Research
Evaluation of 3- to 8-Year Treatment Outcomes and Success Rates With 6 Implant Brands in Partially Edentulous Patients
Histometric Analysis of Bone Repair in Bone-Implant Interface Using a Polylactic/ Polyglycolic Acid Copolymer Associated With Implants in Rabbit Tibia
Fold-Over Flap Technique for Developing the Facial Gingival Contour: A Case Report
Rehabilitation of the Atrophic Posterior Maxilla With Pterygoid Implants: A Review
Immediate Loading of Maxillary and Mandibular Implant-Supported Fixed Complete Dentures: A 1- to 10-Year Retrospective Study
Immediate Loading of Single Post-Extractive Implants in the Anterior Maxilla: 12-Month Results From a Multicenter Clinical Study
Immediate Implants After Enucleation of an Odontogenic Keratocyst: An Early Return to Function
Effects of Different Abutment Connection Designs on the Stress Distribution Around Five Different Implants: A 3-Dimensional Finite Element Analysis
Implant-Prosthetic Rehabilitation of a Patient with Nonsyndromic Oligodontia: A Clinical Report
Planning for Immediate Loading of Implant-Supported Prostheses: Literature Review
Development of a Rat Model of Bisphosphonate-Related Osteonecrosis of the Jaw (BRONJ)
Anorganic Bovine-Derived Hydroxyapatite vs β-Tricalcium Phosphate in Sinus Augmentation: A Comparative Histomorphometric Study
Peripheral Giant Cell Granuloma Associated With Dental Implants: Clinical Case and Literature Review
Bilateral Vertical Ridge Augmentation With Block Grafts and Guided Bone Regeneration in the Posterior Mandible: A Case Report
Cell Culture–Based Tissue Engineering as an Alternative to Bone Grafts in Implant Dentistry: A Literature Review

Journal of Oral Implantology September 2012

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