Category Archives: Surgical Reconstruction of Defects of the Jaws

Hard Tissue Defect

Hard Tissue Defect Several factors concerning the actual osseous defect must be thoroughly assessed to help formulate a viable treatment plan: Adequate radiographs are necessary to evaluate the full extent of the osseous defect. The site of thedefect may be just as important a’s the size of the defect when dealing with mandibular osseous problems. For example, if the mandibular condyle is missing. treatm

Combinations of Grafts

Combinations of Grafts The ideal graft would have the structural characteristics of a block graft with the qsteogenic potential of particulate  marrow and cancellous-bone grafts. However, a large block graft necessitates removal of a large portion of the patient’s anatomy and does ‘not provide the high concentration of osteogenic cells the particulate marrow and  cancellous-bone graft does. A techn

Xenoqenelc Grafts

Xenoqenelc Grafts Also known as xenografts or hetetografts, xenogeneic grafts are taken from one species and grafted to another. The antigenic dissimilarity of these grafts is greater than with allogeneic bone. The organic matrix of xenogenic bone is antigenically dissimilar to that of human bone, and therefore the graft must be treated more vigorously to prevent rapid rejection of the graft. Bone grafts of th

Allogeneic Grafts

Allogeneic Grafts Also known as allografts or liomogrufts, allogeneic grafh ‘are grafts taken from another individual of the same species. Because- the individuals are usually genetically dissimilar, treating the graft to reduce the antigenicity is routinely accomplished. Today the most commonly used allogeneic bone is ·freeze-dried. All of these treatments destroy any remaining osteogenic cells in̵

Autogenous Grafts

Autogenous Grafts Also known as autogratts or self-grafts, autogenous grafts are composed of tissues from the same individual. Fresh autogenous bone is the most ideal’ bone graft material. It . is unique among bone grafts- in that it is the only type of bone graft to supply living, immunocompatible bone cells essential to phase I osteogenesis. The larger number of living cells that are transplanted, the

TYPES OF GRAFTS

TYPES OF GRAFTS Several types of bone grafts are available for use in reconstructive surgery. A useful classification categorizes the. bone grafts according to their origin and thus their potential   to induce an immunologic response. Because of their origins and the preparations used to help avoid an intenseimmune response, the grafts have different qualities and indications fat use.

Immune Response

Immune Response When a tissue is transplanted from one site to another in the same individual, immunologic complications usually do not occur.’ The immune system is not triggered, because the tissue is recognized as “self.” However, when a tissue is transplanted from one individual to another or from one species to another, the immune system may present a formidable obstacle, to the success

TYPES OF GRAFTS

TYPES OF GRAFTS Several types of bone grafts are available for use in reconstructive  surgery. A useful classification categorizes the.bone grafts according to their origin and thus their potential to induce an immunologic response. Because of their origins and the preparations used to help avoid an intense immune response, the grafts have different qualities and indications fat use.

Two-Phase Theory of Osteogenesis

Two-Phase Theory of Osteogenesis Two basic processes occur on transplanting bone from one area to another in the same indlvlduall-l”: The first process that leads to bone regeneration arises initially from transplanted cells in the graft. that proliferate and form new osteoid. The amount of bone regeneration during this phase depends on the amount of transplanted bone cells that survive the grafting proc

Surgical Reconstruction of Defects of the Jaws

CHAPTER OUT LINE BIOLOGIC BASIS OF BONE RECONSTRUCTION Two-Phase Theory of Osteogenesis Immune Response TYPES OF GRAFTS Autoqenous Grafts Advantages Disadvantages Allogeneic Grafts Advantages Disadvantages Xenogeneic Grafts Advantages Disadvantages Combinations of Grafts Advantages Disadvantages ASSESSMENT OF PATIENT IN NEED OF RECONSTRUCTION Hard Tissue Defect Soft Tissue Defect Associated Problems GOALS -AND PRIN