{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T00:10:27Z","timestamp":1780445427417,"version":"3.54.1"},"reference-count":39,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2008,12,1]],"date-time":"2008-12-01T00:00:00Z","timestamp":1228089600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2008,12]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> The aim of this randomized, controlled, prospective clinical study was to compare guided tissue regeneration (GTR) to enamel matrix derivative (EMD) for the treatment of intrabony defects in patients with chronic advanced periodontitis.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Forty (39 evaluable) 3\u2010wall intrabony defects, each with a depth \u22654 mm measured from the crest of the bony defect, were treated in 40 subjects with advanced chronic periodontitis. Regeneration of angular bone defects was induced using non\u2010resorbable membranes (GTR group; n = 20) or EMD (EMD group; evaluable n = 19). Clinical parameters, including probing depth (PD), clinical attachment level (CAL), gingival recession, radiographic measurement of the defect depth, plaque index, and bleeding on probing, were measured at baseline and at 12 and 36 months following surgery.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> Twelve months after surgery, sites treated with GTR demonstrated a mean CAL gain of 2.5 \u00b1 1.2 mm and a mean reduction in PD of 3.5 \u00b1 1.2 mm compared to baseline. The corresponding outcomes at 36 months were 2.0 \u00b1 1.1 mm (CAL) and 3.2 \u00b1 1.1 mm (PD). Sites treated with EMD demonstrated a mean CAL gain of 2.9 \u00b1 1.4 mm and a mean reduction in PD of 3.5 \u00b1 1.4 mm at 12 months, with a mean CAL gain of 2.4 \u00b1 1.2 mm and a mean PD reduction of 3.1 \u00b1 1.4 mm at 36 months. The differences in PD reduction and CAL gain were statistically significant between the groups and for each time point compared to baseline. Attachment loss was seen in both groups between the 12\u2010 and 36\u2010month observations. Measured radiographic bone fill was 57.0% \u00b1 21% at 12 months and 53.7% \u00b1 14.3% at 36 months in the GTR group compared to 50.5% \u00b1 19% at 12 months and 58.8% \u00b1 14.9% at 36 months in the EMD group.<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> The treatment of intrabony defects in patients with chronic advanced periodontitis using GTR or EMD led to significantly improved clinical parameters. Tests of statistical significance demonstrated better results with EMD, although the absolute differences between treatment modalities was small. Further studies with a larger number of treated defects are necessary to verify these findings.<\/jats:p>","DOI":"10.1902\/jop.2008.080135","type":"journal-article","created":{"date-parts":[[2008,12,4]],"date-time":"2008-12-04T07:12:25Z","timestamp":1228374745000},"page":"2281-2289","source":"Crossref","is-referenced-by-count":45,"title":["Treatment of Intrabony Defects Using Guided Tissue Regeneration or Enamel Matrix Derivative: A 3\u2010Year Prospective Randomized Clinical Study"],"prefix":"10.1002","volume":"79","author":[{"given":"Alessandro","family":"Crea","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonardo","family":"Dassatti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oliver","family":"Hoffmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gregory\u2010George","family":"Zafiropoulos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giorgio","family":"Deli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2008,12]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"38","volume-title":"Glossary of Periodontal Terms","author":"American Academy of Periodontology","year":"2001"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0757.1993.tb00202.x"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.1993.64.4.254"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2005.76.3.341"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2001.72.1.25"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0765.1978.tb00164.x"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2003.74.9.1282"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.1981.tb00895.x"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.1977.48.9.570"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-051X.2002.290407.x"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.1993.64.10.934"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2007.070146"},{"key":"e_1_2_7_14_1","first-page":"128","article-title":"Periodontal regeneration of intrabony defects: An evidence\u2010based treatment approach","volume":"15","author":"Cortellini P","year":"1995","journal-title":"Int J Periodontics Restorative Dent"},{"key":"e_1_2_7_15_1","first-page":"CD001724","article-title":"Guided tissue regeneration for periodontal infra\u2010bony defects","author":"Needleman IG","year":"2006","journal-title":"Cochrane Database Syst Rev"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-051X.1997.00833.x"},{"key":"e_1_2_7_17_1","first-page":"CD003875","article-title":"Enamel matrix derivative (Emdogain) for periodontal tissue regeneration in intrabony defects","author":"Esposito M","year":"2005","journal-title":"Cochrane Database Syst Rev"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1902\/annals.2003.8.1.193"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.1997.tb00247.x"},{"key":"e_1_2_7_20_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2000.71.5.752"},{"key":"e_1_2_7_21_1","doi-asserted-by":"publisher","DOI":"10.1159\/000100386"},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-051X.2003.10146.x"},{"key":"e_1_2_7_23_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2006.050071"},{"key":"e_1_2_7_24_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2000.71.12.1821"},{"key":"e_1_2_7_25_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.1999.70.3.255"},{"key":"e_1_2_7_26_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-051x.2001.028005397.x"},{"key":"e_1_2_7_27_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2002.73.1.3"},{"key":"e_1_2_7_28_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-051x.2000.027008603.x"},{"key":"e_1_2_7_29_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.2004.00518.x"},{"key":"e_1_2_7_30_1","doi-asserted-by":"publisher","DOI":"10.1902\/annals.1999.4.1.1"},{"key":"e_1_2_7_31_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.1973.44.1.43"},{"key":"e_1_2_7_32_1","first-page":"589","article-title":"The simplified papilla preservation flap. 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