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Recessions were randomly treated by means of MCAT\u2009+\u2009CM (test) or MCAT\u2009+\u2009CTG (control). Complete root coverage (CRC), mean root coverage (MRC), gingival recession depth (GRD), probing pocket depth (PD), keratinized tissue width (KTW), and thickness (KGT) were compared with baseline values and with the 12-month results.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      After 9\u00a0years, CRC was observed in 2 patients, one in each group. At 9\u00a0years, MRC was 23.0\u2009\u00b1\u200944.5% in the test and 39.7\u2009\u00b1\u200935.1% in the control group (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.179). The MRC reduction compared to 12\u00a0months was\u2009\u2212\u200950.1\u2009\u00b1\u200947.0% and\u2009\u2212\u200948.3\u2009\u00b1\u200937.7%, respectively. The upper jaw obtained 31.92\u2009\u00b1\u200943.0% of MRC for the test and 51.1\u2009\u00b1\u200927.8% for the control group (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.111) compared to the lower jaw with 8.3\u2009\u00b1\u200946.9% and 20.7\u2009\u00b1\u200940.3%. KTW and KGT increased for both CM and CTG together from 2.0\u2009\u00b1\u20090.7 to 3.1\u2009\u00b1\u20091.0\u00a0mm (&lt;\u20090.0001). There were no statistically significant changes in PD.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The present results indicate that (a) treatment of MAGR using MCAT in conjunction with either CM or CTG is likely to show a relapse over a period of 9\u00a0years, and (b) the outcomes obtained in maxillary areas seem to be more stable compared to the mandibular ones.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical relevance<\/jats:title>\n                    <jats:p>The mean root coverage at 12\u00a0months could not be fully maintained over 9\u00a0years. On a long-term basis, the results seem to be less stable in the mandible as compared to maxillary areas.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00784-022-04674-9","type":"journal-article","created":{"date-parts":[[2022,8,22]],"date-time":"2022-08-22T09:06:12Z","timestamp":1661159172000},"page":"7135-7142","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Treatment of multiple adjacent RT 1 gingival recessions with the modified coronally advanced tunnel (MCAT) technique and a collagen matrix or palatal connective tissue graft: 9-year results of a split-mouth randomized clinical trial"],"prefix":"10.1007","volume":"26","author":[{"given":"B.","family":"Moln\u00e1r","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Aroca","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Dobos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Orb\u00e1n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Szab\u00f3","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Windisch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"St\u00e4hli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Sculean","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,8,22]]},"reference":[{"issue":"1","key":"4674_CR1","doi-asserted-by":"publisher","first-page":"98","DOI":"10.1902\/annals.1999.4.1.98","volume":"4","author":"PG Pini","year":"1999","unstructured":"Pini PG (1999) Mucogingival deformities. 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