Bone Regeneration Essay

Introduction
So far, various techniques have been used for reconstruction and regeneration of maxillary and mandibular bone defects. Autogenous bone grafting, guided bone regeneration (GBR), distraction osteogenesis and nerve transpositioning are among these regenerative techniques (1-8). Decision making for the treatment could be influenced by the type, size and location of the bone defects (2, 3, 9, 10). GBR had high success rate in treating small alveolar defects such as dehiscence or fenestration. Regenerative bony walls around the defect with ingrowing blood vessels can begin osteogenesis (11) larger bone defects with insufficient regenerative walls and an low quality avascular bed need varied amount of autogeneous bone graft from extra oral or intra oral donor sites, however, the patient may suffer from complications in donor site as well as bone graft resorption.(10, 12-15)
Recent research has been focused on distinguishing the most successful augmentation surgery for restoring deficient bone (4, 16-18). Surgical techniques and survival of the bone graft has been vastly highlighted in the literature. ,However, the importance of recipient site on success rate of augmentation procedure has been less issued (16).
We have focused on recipient site characteristics in ABC classification (16) as follow:
1. Presence of vertical regenerative walls in both sides of the recipient site or one site which classified as A and B group respectively. Absence of regenerative walls in both side named C group. (Fig.1, 2 ).
2. Width of the base which divided to 3 groups: 1: More than 5 mm; 2: between 3-5 mm; less than 3 mm.
Sinus cavity and extraction sockets were totally excluded from this classification because the healing process h...

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...treatments are considered despite of all the morbidities and possible graft resorbtions.
But with appropriate case selection and modifying a c3 defect to a A1, , autogenous regenerative walls are created that will lead to a simple and cost benefit treatment.

Conclusion
Amount of the vertical or horizontal augmentation, depicting high quality bone like tissue during reentry, success rate of the dental implants in bone graft area and cloudy histological figures, never can lead to make decision for selecting best treatment for the patients with deficient alveolar ridge, if we do not have detailed map of the recipient bone.
With ABC recipient site classification surgeons gain some insight in to regenerative potential of the surgical bed and can consider some modifications to help increasing of success rate of bone healing and decreasing morbidities of donor sites.