RESULTS	Thus , ( i ) in both treatment groups the number of implants that failed to osseointegrate ( early failures ) was small ( < 2 % ) ; ( ii ) at the end of the recommended periods of bone healing prior to loading , - in both groups , maxilla = 6 months and mandible = 3 months - the level of the marginal bone was close to the coronal rim of the fixture ; group A : 1.54 + / -0.92 mm , group B : 1.31 + / -0.77 mm .\