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The defects were randomly assigned to the bovine collagen membrane (BME) group; acellular dermal matrix (ADM) group; and no membrane group. Measurements at baseline and 6 months re\u2010entry included defect height (DH: from smooth\u2013rough junction to the most apical part of the defect), defect width (DW: at the widest part of the defect), and horizontal defect depth (HDD: at three locations \u2013 smooth\u2013rough junction, middle, and most apical portion of the defect). All measurements were taken from a reference stent. Statistical analyses were performed for comparison of intra\u2010 and inter\u2010group comparisons.<\/jats:p><jats:p><jats:bold>Results: <\/jats:bold> All implants placed were successfully osseointegrated. DH at baseline for three groups were not significantly different (<jats:italic>P<\/jats:italic>=0.858). Mean % DH reductions for ADM, BME, and control groups at 6 months were 73.9\u00b117.6%, 68.1\u00b130.1%, and 63.6\u00b123.9%, respectively, with no significant difference among the groups (<jats:italic>P<\/jats:italic>=0.686). Mean horizontal bone gain, however, was significantly greater for membrane groups (1.7\u2003mm for ADM, 1.6\u2003mm for BME) compared with control group (1\u2003mm) (<jats:italic>P<\/jats:italic>=0.044). Implant exposure resulted in significant reduction in total height gain (79.1\u00b114.3% vs. 57\u00b123.5%, <jats:italic>P<\/jats:italic>=0.021).<\/jats:p><jats:p><jats:bold>Conclusions: <\/jats:bold> Within the limit of this study, it is concluded that SBA technique achieved predictable clinical outcomes. The addition of absorbable membranes enhanced bone gain in thickness compared with membrane\u2010treated sites.<\/jats:p>","DOI":"10.1111\/j.1600-0501.2007.01408.x","type":"journal-article","created":{"date-parts":[[2007,10,25]],"date-time":"2007-10-25T05:42:12Z","timestamp":1193290932000},"page":"32-41","source":"Crossref","is-referenced-by-count":77,"title":["Effect of absorbable membranes on sandwich bone augmentation"],"prefix":"10.1111","volume":"19","author":[{"given":"Sang\u2010Hoon","family":"Park","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kwang\u2010won","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tae\u2010Ju","family":"Oh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carl 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