Guided Bone Regeneration (Osteopromotion) Medical Assignment Help

Guided Bone Regeneration (Osteopromotion) 

In guided bone regeneration, a membrane (nonresorbable or resorbable) is used to cover an area where bone graft healing or bone regeneration is desired. The concept c’: guided regeneration, or osteo rornotion, is
based o , the ability to exclude undesirable cell types, such a’ epithelial cells or fibroblasts, from the area where bone healing is taking place. .
In 19H2, Nyman 19 described a technique to improve periodontal ligament regeneration using a membrane barrier to exclude undesirable cells from the area where periodontal ligament healing or regeneration was required. Dahlin er al20 showed that bone growth around implants couled be facilitated using a similar technique. By placing a membrane covering over a bone graft,”  aster-growing fibroblasts and epithelial cells can be walled off, allowing bone to grow in a relatively protected environment.Many type~ 01 materials have been used as membrane coverings. Currently, expanded olytetrafluorocthylenc

lilac crest paruculate graft used for auqrnentation of inferior border of mandible. A, Preoperative Panorex of atrophic edentulous mandible. B, Panorex after inferior border grafting with a cadaveric mandibular strut packed with iliac crest particulate bone harvested from the patient. C, Six-month postoperative Panorex showing consolidation and maturation of the gr~ft with increased dimensions .. (Courtesy of Or. Peter Quinn.)

lilac crest paruculate graft used for auqrnentation of inferior border of mandible.
A, Preoperative Panorex of atrophic edentulous mandible. B, Panorex after inferior border grafting
with a cadaveric mandibular strut packed with iliac crest particulate bone harvested from
the patient. C, Six-month postoperative Panorex showing consolidation and maturation of the
gr~ft with increased dimensions .. (Courtesy of Or. Peter Quinn.)

FIG. 13-33 Diagrammatic representation of hydroxyapatite (HA) augmentation. procedure. A, Vertical incisions placed anterior to mental nerve area. Subperiosteal tunnels are then developed in posterior and anterior areas. Retraction sutures are used to elevate margins of incision. 8, Injection of HA into subperiosteal tunnels. C, Soft tissue closure. D, Preoperative clinical photograph .•

FIG. 13-33 Diagrammatic representation of hydroxyapatite
(HA) augmentation. procedure. A, Vertical incisions placed
anterior to mental nerve area. Subperiosteal tunnels are
then developed in posterior and anterior areas. Retraction
sutures are used to elevate margins of incision. 8, Injection
of HA into subperiosteal tunnels. C, Soft tissue closure.
D, Preoperative clinical photograph 

(el’Fl’Lt membrane is the most popular.’ This membrane is not resorbable and must be removed after adequate bone .healing occurs. Resorbable membranes such as homologous grafts and genetically engineered materials such as collagen, eliminate the need for a second surgical procedure for removal. These materials and the concept of guided tissue regeneration arc discussed fully in chapter 14.

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