Setting of composite hydroxylapatite/plaster implants with blood for bone reconstruction

Nonresorbable sintered hydroxylapatite (HA) particles are widely used for alveolar ridge augmentation in edentulous patients to support dentures or for filling infrabony defects due to bone resorption in progressive periodontal disease. these particles tend to scatter when implanted with water or saline as the vehicle. studies in our laboratory of different binders to prevent particle scatter during implantation suggested the utility of plaster of paris for this purpose. In most operative procedures the ha/plaster mixtures moistened with water or saline set and harden adequately, especially when a small amount of potassium sulfate has been added to the plaster component to accelerate setting. when the implantation site is bloody or has an excess of tissue fluids, setting of the mixture is considerably slowed if, indeed, the plaster is not actually washed away.

Download Full-text

Scanning electron microscopy of composite hydroxylapatite/plaster implants for bone reconstruction

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100143250 ◽

1986 ◽

Vol 44 ◽

pp. 326-327

Author(s):

J. S. Hanker ◽

B. L. Giammara

Keyword(s):

Tooth Extraction ◽

Alveolar Ridge ◽

Small Particles ◽

Alveolar Ridge Augmentation ◽

Sintered Ceramic ◽

Ridge Augmentation ◽

Fibrovascular Tissue ◽

Infrabony Defects ◽

Edentulous Patients ◽

Scanning Electron

Nonresorbable sintered ceramic hydroxylapatite (HA) is widely employed for filling defects in jaw bone. The small particles used for alveolar ridge augmentation in edentulous patients or for infrabony defects due to periodontal disease tend to scatter when implanted using water or saline as the vehicle. Larger blocks of this material used for filling sockets after tooth extraction don't fit well. Studies in our laboratory where we compared bovine serum albumin, collagen and plaster of Paris as binders to prevent particle scatter during implantation suggested that plaster was most useful for this purpose. In addition to preventing scatter of the particles, plaster enables the formation of implants of any size and.shape either prior to or during surgery. Studies with the PATS reaction have indicated that plaster acts as a scaffold for the incorporation of HA particles into bone in areas where the implant contacts either host bone or periosteum. The shape and integrity of the implant is maintained by the plaster component until it is replaced over a period of days by fibrovascular tissue.

Download Full-text

Surgical Approaches Based on Biological Objectives: GTR versus GBR Techniques

International Journal of Dentistry ◽

10.1155/2013/521547 ◽

2013 ◽

Vol 2013 ◽

pp. 1-13 ◽

Cited By ~ 13

Author(s):

Gaia Pellegrini ◽

Giorgio Pagni ◽

Giulio Rasperini

Keyword(s):

Periodontal Disease ◽

Tooth Extraction ◽

Alveolar Bone ◽

Surgical Techniques ◽

Surgical Approaches ◽

Alveolar Ridge ◽

Therapeutic Approaches ◽

Alveolar Ridge Augmentation ◽

Biological Basis ◽

Ridge Augmentation

Guided tissue regenerative (GTR) therapies are performed to regenerate the previously lost tooth supporting structure, thus maintaining the aesthetics and masticatory function of the available dentition. Alveolar ridge augmentation procedures (GBR) intend to regain the alveolar bone lost following tooth extraction and/or periodontal disease. Several biomaterials and surgical approaches have been proposed. In this paper we report biomaterials and surgical techniques used for periodontal and bone regenerative procedures. Particular attention will be adopted to highlight the biological basis for the different therapeutic approaches.

Download Full-text