SynthesisBMC oral health2023
Comparative analysis of xenogeneic collagen matrix and autogenous subepithelial connective tissue graft to increase soft tissue volume around dental implants: a systematic review and meta-analysis.
Synthesis in BMC oral health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 20 citations in OpenAlex.
- Effects of different oral barrier membranes on the efficacy and safety of guided bone regeneration in patients with dental implants: a systematic review and meta-analysis.Acta odontologica Scandinavica · 2025Pooled it
- Efficacy of Xenogeneic Collagen Matrices in Augmenting Peri-Implant Soft Tissue: A Systematic Review and Meta-Analysis.Clinical and experimental dental research · 2024Pooled it
- Clinical outcomes of free gingival graft, xenogeneic collagen matrix, and acellular dermal matrix for peri-implant keratinized mucosa augmentation: a randomized controlled trial.Clinical oral investigations · 2026Trial
- Modified vascularized interpositional periosteal connective tissue graft versus xenogeneic collagen matrix for soft tissue augmentation around implant in esthetic zone (A comparative Study).BMC oral health · 2025Trial
- 3D-Analysis of Peri-Implant Soft Tissue Gain With Collagen Matrix and Connective Tissue Graft: A Randomized Control Trial.Clinical implant dentistry and related research · 2025Trial
- Alveolar Ridge Preservation With Fibro-Gide or Connective Tissue Graft: A Randomized Controlled Trial of Soft and Hard Tissue Changes.Clinical and experimental dental research · 2024Trial
- Influence of an allogenic collagen scaffold on implant sites with thin supracrestal tissue height: a randomized clinical trial.Clinical oral investigations · 2024Trial
- Comparative Histological Evaluation of Collagen Matrix Architectures for Soft Tissue Augmentation in the Oral Cavity: A Preclinical Canine Model.Bioengineering (Basel, Switzerland) · 2026Article
- Volumetric Changes at Pontic Sites After Connective Tissue Grafting: A Systematic Review.Journal of clinical medicine · 2026Review
- Article
- Comparative outcomes of xenogeneic collagen matrices and autogenous graft-based techniques to increase mucosal thickness and keratinised mucosa width at implant sites: are autologous grafts still the gold standard? A systematic review and meta-analysis of randomised clinical trials.Journal of periodontal & implant science · 2026Review
- Horizontal Platelet-Rich Fibrin Membrane Block for Peri-Implant Soft Tissue Augmentation: An Experimental Animal Study with Clinical Illustration.Dentistry journal · 2026Article
- Two-Step Palatal Shield Technique Using Flowable Composite Resin for Donor-Site Protection Following De-Epithelialized Free Gingival Grafting: A Case Report Illustrating a Novel Technique.Case reports in dentistry · 2026Article
- Keratinized Mucosa Width and Peri-Implant Health: Clinical Associations to Inform Soft Tissue Evaluation.International journal of dentistry · 2026Article
- Soft-Tissue Volume Augmentation at Dental Implant Placement Using Collagen-Based Matrix Characterized by Oriented Open Pore Structure: A Retrospective Study with a Median Follow-Up of 17 Months.Bioengineering (Basel, Switzerland) · 2025Article
- Analysis of the Expression and Activity of Cyclooxygenases COX-1 and COX-2 in THP-1 Monocytes and Macrophages Cultured with Xenogenic Collagen Matrices Biofunctionalized with the Injectable Platelet-Rich Fibrin.International journal of molecular sciences · 2025Article
- A Novel Pre-Customized Saddle-Shape Soft Tissue Substitute for Volume Augmentation: An Ex Vivo Study in Pig Mandibles.Materials (Basel, Switzerland) · 2025Article
- Human Acellular Collagen Matrices-Clinical Opportunities in Tissue Replacement.International journal of molecular sciences · 2024Review
- Association of Connective Tissue Grafts in Immediate Implants: Systematic Review and Meta-Analysis.Dentistry journal · 2024Review
- Peri-Implant Soft-Tissue Augmentation Using Xenogeneic Collagen MatricesJournal of oral & maxillofacial researchReview
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThe gold standard for a soft tissue augmentation around implants is a subepithelial connective tissue graft (CTG), but the xenogeneic collagen matrices (XCM) started to be used as an alternative. This systematic review aimed to assess the effectiveness XCM in comparison to CTG for the increasing the thickness of the soft tissue around implants. DATA: All studies included at least two parallel groups comparing the use of CTG and XCM with a minimum follow-up of 3 months. As the primary outcome, the amount of soft tissue thickness gain after soft tissue augmentation with XCM or CTG was assessed. Secondary outcomes were clinical and patient-related outcomes; evaluation of aesthetic outcomes, patient-reported outcomes measures (PROMs) and complications. Eligible studies were selected based on the inclusion criteria. Meta-analysis was applied whenever possible. The quality of the evidence of studies including in meta-analysis was assessed using the GRADE approach. SOURCE: A systematic literature search up to January 2022 was conducted using the following electronic databases: PubMed (MEDLINE), Scopus, Cochrane Library, LILACS, eLIBRARY.RU. Unpublished researches, the gray literature, nonprofit reports, government studies and other materials were reviewed electronically using an EASY search. An additional manual search was carried out in November 2022. STUDY SELECTION: Of the 1376 articles from the initial search, 8 randomized controlled trials (RCTs) (306 patients and 325 implants) were included in this systematic review, and 7 studies were part of the meta-analysis. Meta-analysis revealed that XCM is less effective than the CTG in increasing soft tissue thickness around dental implants. However, XCM also provides soft tissue thickness gain and can be recommended for use in various clinical situations. CLINICAL SIGNIFICANCE: Previous systematic reviews and meta-analyses have shown that autologous grafts are more effective than collagen matrices in increasing soft tissue thickness, however, the latter can be used as an alternative. Studies included in previous systematic reviews varied in design, which could lead to limitations. The present systematic review and meta-analysis includes for the first time only randomized controlled clinical trials with collagen matrix of xenogeneic origin in the test group. Tight eligibility criteria were established, and the main parameter studied was soft tissue thickness. It was found that xenogeneic collagen matrix is effective for increasing soft tissue thickness around dental implants, however, the results obtained using an autogenous connective tissue graft are superior.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.