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Treatment of soft tissue recessions at titanium implants using a resorbable collagen matrix: a pilot study
Author(s) -
Schwarz Frank,
Mihatovic Ilja,
Shirakata Yoshinori,
Becker Jürgen,
Bosshardt Dieter,
Sculean Anton
Publication year - 2014
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12042
Subject(s) - soft tissue , titanium , dentistry , matrix (chemical analysis) , medicine , biomedical engineering , materials science , surgery , metallurgy , composite material
Objectives To histologically assess the effectiveness of a porcine‐derived collagen matrix ( CM ) and a subepithelial connective tissue graft ( CTG ) for the coverage of single mucosal recessions at osseointegrated dental implants. Materials and methods Chronic‐type mucosal M iller C lass I ‐like recessions (mean clinical defect height: 0.67 ± 0.33–1.16 ± 0.19 mm) were established at the buccal aspect of titanium implants with platform switch in six beagle dogs. The defects were randomly allocated to either (1) coronally advanced flap surgery ( CAF ) + CM , (2) CAF + CTG or (3) CAF alone. At 12 weeks, histomorphometrical measurements were made (e.g.) between the implant shoulder ( IS ) and the mucosal margin ( PM ) and IS and the outer contour of the adjacent soft tissue (mucosal thickness [ MT ]). Results All treatment procedures investigated were associated with an almost complete soft tissue coverage of the defect area (i.e. coronal positioning of PM relative to IS ). Mean IS ‐ PM and MT values tended to be increased in both CAF + CM (1.04 ± 0.74 mm/0.71 ± 0.55 mm) and CAF + CTG (0.88 ± 1.23 mm/0.62 ± 0.66 mm) groups when compared with CAF (0.16 ± 0.28 mm/0.34 ± 0.23 mm) alone. These differences, however, did not reach statistical significance. Conclusions Within the limits of this pilot study, it was concluded that all treatment procedures investigated were effective in covering soft tissue recessions at titanium implants.