The use of DBB/CF reduced the magnitude of vertical bone resorption , yet the study showed high risk of bias .
Implication s of Key Findings Within the limitations of this systematic review , L-PRF reduced the magnitude of vertical and horizontal bone resorption , which places L-PRF as a potential material of choice for ridge preservation procedures .
Conclusions Within the limitations and weaknesses of both studies , the use of DBB/CF prevented the vertical crestal bone resorption while the L-PRF prevented both the horizontal and vertical crestal bone resorption .
Background The purpose of this systematic review was to accurately assess the procedural success of  ridge preservation technique  through the application of strict inclusion and exclusion criteria .
Ridge alterations following grafting of fresh extraction sockets in man. A randomized clinical trial.
OBJECTIVE To evaluate dimensional alterations of the alveolar ridge that occurred following tooth extraction at sites grafted with Bio-Oss ( ® ) Collagen . MATERIAL AND METHODS Twenty-eight subjects with maxillary incisors , canines , and premolars scheduled for extraction were included . The tooth was carefully removed . The patients were r and omly assigned to a test or a control group . In the test group patients , Bio-Oss ( ® ) Collagen was placed in the fresh extraction socket while in the controls no grafting was performed . Radiographic examination ( cone beam computed tomograms , CBCT ) was performed immediately after tooth extraction and socket treatment . Four months later , a new CBCT was obtained . In the radiographs , ( i ) the distance ( mm ) between base of the alveolar process ( apex ) and the buccal and palatal crests was determined , ( ii ) the outer profile of alveolar process of the experimental sites was outlined , and the cross section of the area ( mm(2 ) ) determined . RESULTS After 4 months of healing , the buccal and to a less extent also the palatal bone plate had become markedly reduced in height . The placement of a bio material in the socket failed to prevent resorption of the buccal and palatal bone walls . The cross-sectional area of the control ridge was reduced about 25 % and of the test ridge with 3 % . CONCLUSION The placement of a xenograft in fresh extraction sockets markedly counteracted the reduction in the hard tissue component of the edentulous sites
The use of DBB/CF reduced the magnitude of vertical bone resorption , yet the study showed high risk of bias .
Implication s of Key Findings Within the limitations of this systematic review , L-PRF reduced the magnitude of vertical and horizontal bone resorption , which places L-PRF as a potential material of choice for ridge preservation procedures .
Conclusions Within the limitations and weaknesses of both studies , the use of DBB/CF prevented the vertical crestal bone resorption while the L-PRF prevented both the horizontal and vertical crestal bone resorption .
Background The purpose of this systematic review was to accurately assess the procedural success of  ridge preservation technique  through the application of strict inclusion and exclusion criteria .