[ bone gain by application of bone grafts and GTR after surgical extracted lower 3[rd] molars]

ABSTRACT

The surgical exctration of the impacted lower third molars may cause a loss in the amount of the alveolar bone which covers the distal root of the adjacent lower second molars. The specimen of this study was [27] patients with [54] impacted lower third molars in similar impaction positions which is the crown of the 3[rd] molar touch the distal surface of the distal root of the adjacent lower 2[nd] molar, and its surgical extraction associated with minimum reveal of the distal root surface about [4] mm. the research done by application of bone graft which was a mixture of [Perio Glass] and [DFDBA] in equal amounts in the socket of the extracted molar, then coverage the graft with resorbable [GTR] of [ATRISORB] membranes to achieve maximum bone coverage of the denuded root. The clinical findings at 12 months after surgeries showed that the average of the bone gain was more at the study group [2.82 mm] than at the control group [0.26 mm], the average of attachment gain was 2.33 mm more at the study group than at the control group, the average of periodontal pocket reduction was 2 mm more at the study group than at the control group, and the average of gingival recession was 0.33 mm less at the study group than at the control group. We can conclude from this study that the application of bone graft [mixture of Perio Glass and DFDBA in equal amounts] in the socket of surgical extracted third molar and coverage of this graft with resorbable [ATRISORB] membrane are indicated to achieve maximum bone coverage of the denuded surface of the distal root of the second molar and improve its prognosis