Prosthodontic Rehabilitation of Malpositioned Implants After Ameloblastoma Followed by Mandibulectomy and Costal Bone Graft: A Clinical Report.
Prosthodontic Rehabilitation of Malpositioned Implants After Ameloblastoma Followed by Mandibulectomy and Costal Bone Graft: A Clinical Report.
Filed under: Rehab Centers
Implant Dent. 2012 Dec 31;
Wang W, Mao CY, Gu XH
This clinical report describes the rehabilitation with costal bone graft reconstruction and 3 implants of a patient with a partial mandibular defect as a result of a partial mandibulectomy due to ameloblastoma of the left mandible. Due to the altered shape of the graft bone, the implants were malpositioned in the buccolingual plane. The prosthodontic rehabilitation was successfully completed by using an implant-supported milled bar combined with telescopic crown-retained dentures. This tooth implant-supported prosthesis successfully restored function and esthetics. Aspects that deal with the repair of the buccal soft tissues are discussed.
HubMed – rehab
Heat Generation in 1-Piece Implants During Abutment Preparations With High-Speed Cutting Instruments.
Filed under: Rehab Centers
Implant Dent. 2012 Dec 31;
Ormianer Z, Lewinstein I, Moses O
OBJECTIVES:: Evaluation of heat generation in 1-piece implants according to 3 variables: preparation time, bur type, and preparation environment. MATERIALS AND METHODS:: Study implants were 1-piece designs with the same endosseous dimensions and surface microtexture, but with abutment sections that were either conical in shape, which required clinical preparations to shape and establish a restorative finish line (test), or with a pre-machined shape and restorative margin, which required minimal preparations (control) to accommodate a cemented crown. Burs were either carbide (group 1) or diamond (group 2), and the preparation environment was either ambient air or under water spray. An infrared camera was used to measure temperature changes in the exposed endosseous implant threads during grinding procedures. Three endosseous zones of the implant body were defined for heat measurements: crestal bone region (SP01), middle of the threaded region (SPO2), and apical region (SPO3). Grinding was performed in either ambient air or under water spray. The abutment was reduced to a 2.0 mm height, and one side was ground down to a 30 degree angle. RESULTS:: Highest heat elevations were concentrated in SP01, followed by SP02 and SP03. Average temperature changes in SP01 showed that preparation time and environment significantly affected heat generation but not bur type. Lowest temperatures were exhibited by control implants prepared under water spray. Bur type (carbide or diamond) did not affect temperature changes. CONCLUSION:: Intraoral implant abutment preparations can transfer heat to the bone capable of impairing osseointegration.
HubMed – rehab
Case of Severe Bone Atrophy of the Posterior Maxilla Rehabilitated With Blocks of Equine Origin Bone: Histological Results.
Filed under: Rehab Centers
Implant Dent. 2012 Dec 31;
Pistilli R, Signorini L, Pisacane A, Lizio G, Felice P
PURPOSE:: To report the histological outcomes of a case of bilateral severely resorbed posterior maxilla augmented with the use of blocks of enzymatically deantigenated equine bone. MATERIALS AND METHODS:: In conjunction with bilateral sinus lifts, blocks of enzymatically deantigenated equine bone were used bilaterally to augment the severely atrophic maxilla of a patient seeking a fixed implant-supported prosthesis. After 8 months, bone core samples were obtained from the augmentation sites and implants were placed. RESULTS:: Six months after implant placement, the peri-implant bone levels were maintained. A prosthesis delivered 3 months after implant placement provided excellent rehabilitation. Histological analysis of the bone cores revealed that the graft material was still undergoing remodeling, with newly formed vital bone in all fields and osteoclasts included in the mineralized component. CONCLUSIONS:: The deantigenated equine bone was biocompatible and resorbed only minimally. This material seems to offer excellent potential for being incorporated in a procedure that increases the width of edentulous alveolar crests.
HubMed – rehab
The Influence of Radiation Therapy on Dental Implantology.
Filed under: Rehab Centers
Implant Dent. 2012 Dec 31;
Anderson L, Meraw S, Al-Hezaimi K, Wang HL
Patients with a history of head and neck cancer resection require extensive prosthodontic rehabilitation following cancer treatment. The oral anatomy drastically changes from ablative therapy, and the oral tissue response becomes altered as a consequence of radiation and chemotherapy. Successful restoration of oral function in this specific patient population was increasingly difficult before the widespread use of dental implants. Implant-borne prosthetics are now often used. However, surgical guidelines remain unclear with regard to oncology-related parameters. In this article, guidelines are introduced for implant therapy in the cancer patients according to radiation dosage and timing. Indications for hyperbaric oxygen treatment are highlighted along with risk assessment associated with implant placement. These guidelines are intended to augment knowledge obtained through oncology consultation; moreover, provide a rationale for implant therapy within the course of cancer treatment.
HubMed – rehab
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