The potential benefit of socket preservation therapies was demonstrated result ing in significantly less vertical and horizontal contraction of the alveolar bone crest .
The scientific evidence does not provide clear guidelines in regards to the type of bio material , or surgical procedure , although a significant positive effect of the flapped surgery was observed .
There are no data available to draw conclusions on the consequences of such benefits on the long-term outcomes of implant therapy
OBJECTIVE This systematic review aims to evaluate the scientific evidence on the efficacy in the surgical protocol s design ed for preserving the alveolar ridge after tooth extraction and to evaluate how these techniques affect the placement of dental implants and the final implant supported restoration .
Immediate implantation in fresh extraction sockets. A controlled clinical and histological study in man.
BACKGROUND Early implantation may preserve the alveolar anatomy , and the placement of a fixture in a fresh extraction socket helps to maintain the bony crest . Although a number of clinical studies exist , no histological reports show the outcome of implantation in fresh extraction sockets without the use of membranes in humans compared to implants placed in mature bone . METHODS Forty-eight healthy patients , receiving at least 4 fixtures in each of 2 symmetrical quadrants , underwent placement of 1 experimental fixture placed in a fresh extraction socket ( TI ) and 1 contralateral fixture in mature bone ( CI ) . TI were placed after atraumatical tooth extraction , with a surgical site at the apex of the socket and a tight contact between the fixture and the socket 's walls , but without the use of filling material s or membranes . The flap was coronally repositioned to obtain primary wound closure . Immediately after surgical intervention , a st and ardized periapical radiograph was taken . Second-stage surgery was done after 6 months . Six months after the second surgery , a second st and ardized periapical radiograph was taken and clinical parameters ( bleeding and plaque index ) recorded . Marginal bone loss ( MBL ) from the time of implant placement to the time of fixture removal was calculated by comparing periapical radiographs . TI and CI were then removed by a hollow drill to obtain histological specimens . Non-demineralized sections were stained by acid fuchsin and toluidine blue , and by von Kossa to evaluate the degree of bone mineralization . The percentage of direct implant-bone contact ( DBC ) was calculated by a computerized microscopic digitizer . RESULTS No significant differences in the clinical and radiographic parameters were observed between the 2 experimental categories . There was no statistically significant difference between TI and CI for DBC either in the maxilla or in the m and ible . No connective or fibrous tissues were present around TI or CI . Bone resorption was not present in any of the histological sections . CONCLUSIONS The present study shows that when a screw-type dental implant is placed without the use of barrier membranes or other regenerative material s into a fresh extraction socket with a bone-to-implant gap of 2 mm or less , the clinical outcome and degree of osteointegration does not differ from implants placed in healed , mature bone
The potential benefit of socket preservation therapies was demonstrated result ing in significantly less vertical and horizontal contraction of the alveolar bone crest .
The scientific evidence does not provide clear guidelines in regards to the type of bio material , or surgical procedure , although a significant positive effect of the flapped surgery was observed .
There are no data available to draw conclusions on the consequences of such benefits on the long-term outcomes of implant therapy
OBJECTIVE This systematic review aims to evaluate the scientific evidence on the efficacy in the surgical protocol s design ed for preserving the alveolar ridge after tooth extraction and to evaluate how these techniques affect the placement of dental implants and the final implant supported restoration .