The efficacy of a porcine collagen matrix in keratinized tissue augmentation: a 5-year follow-up study

Abstract

BackgroundWhen keratinized tissue width around dental implants is poorly represented, the clinician could resort to autogenous soft tissue grafting. Autogenous soft tissue grafting procedures are usually associated with a certain degree of morbidity. Collagen matrices could be used as an alternative to reduce morbidity and intra-operatory times. The aim of this study was to assess the efficacy of a xenogeneic collagen matrix as a substitute for soft tissue grafting around dental implants.MethodsFifteen consecutive patients underwent a vestibuloplasty and keratinized tissue reconstruction around dental implants, both in the mandible and the maxilla, with a porcine collagen matrix. The so obtained keratinized tissues were measured and evaluated after 6 months and 1, 4, and 5 years.ResultsThe average gain of keratinized tissue was 5.7 mm. After 6 months, it was observed a resorption of 37%, after 1 year 48%, and after 5 years 59%. The mean gain of keratinized tissue after 5 years was 2.4 mm. Hemostatic effect and post-operative pain were evaluated too. All subjects referred minimal pain with no bleeding. No adverse reaction nor infection was noted.ConclusionsThe present study showed the efficacy of a porcine collagen matrix in keratinized tissue augmentation. The possibility to use a soft tissue substitute is a great achievement as morbidity decreases and bigger areas can be treated in a single surgery.

Use of Collagen Matrix Scaffolds as a Substitute for Soft Tissue Augmentation: Case Series

“…The overall integration of the graft with the surrounding tissues was favorable in terms of color matching, texture, and contour blending. This confirms previously published reports of using BCM around natural teeth ‒ and dental implants …”

“…The main concern in using BCM is the amount of postoperative volume shrinkage. Maiorana et al . observed tissue shrinkage at a percentage of 37% at 6 months, 48% after 1 year, and 59% after 5 years, while Sanz et al .…”

“…This confirms previously published reports of using BCM around natural teeth [7][8][9]13 and dental implants. 10,14,15 The main concern in using BCM is the amount of postoperative volume shrinkage. Maiorana et al 14 observed tissue shrinkage at a percentage of 37% at 6 months, 48% after 1 year, and 59% after 5 years, while Sanz et al 7 reported a 67% of shrinkage at 6 months postoperatively.…”

The influence of different soft‐tissue grafting procedures at single implant placement on esthetics: A randomized controlled trial

“…[26][27][28] XCM was also demonstrated to be effective in the long term, with stable esthetics. 29 In contrast to this, Cairo et al 30 observed a more effective increase in soft-tissue thickness with the application of CTG than with XCM. In terms of recession reduction using a coronally advanced flap with either a CTG or XCM, both achieved comparable and stable results.…”

“…In several studies, applying a XCM to increase soft‐tissue thickness was found to be as effective as a CTG . XCM was also demonstrated to be effective in the long term, with stable esthetics . In contrast to this, Cairo et al .…”