Soft Tissue Regeneration Using Flowable Human Placental Extract

Soft Tissue Regeneration Using Flowable Human Placental Extract
Alveolar ridge preservation following tooth extraction is crucial for successful implant placement. However, delayed healing and poor soft tissue quality remain significant challenges. This presentation explores a novel approach using flowable decellularized Human Placental Connective Tissue Matrix (HPCTM) as an adjunctive agent to enhance soft tissue regeneration and reduce tissue collapse in extraction socket sites.
Background and Key Points
Alveolar Ridge Shrinkage
The alveolar shrinkage following dental extraction is a combined result of physiological changes in both hard and soft tissues overlaying the alveola.
Biomaterial Limitations
Current biomaterials used in alveolar ridge preservation may limit bone resorption but can delay the healing process.
HPCTM Benefits
Human Placental Connective Tissue Matrix offers a molecular scaffold for overlaying soft tissue, potentially reducing shrinkage and accelerated healing wound closure.
This proof of concept study examines how HPCTM can address the limitations of conventional alveolar ridge preservation techniques by enhancing soft tissue healing and reducing bony coronal shrinkage.
Introduction to Alveolar Ridge Preservation
1
Post-Extraction Resorption
Following tooth extraction, the alveolar bone undergoes physiological resorption that can reach up to 50% of its volume in the first year.
2
Preservation Techniques
Alveolar ridge preservation involves filling the socket with bone substitutes and closing it with a barrier to ensure undisturbed healing.
3
Current Limitations
Existing socket closure methods using collagen membranes or grafts have drawbacks including uncontrollable resorption and keratinized tissue loss.
4
Biological Adjuvants
Human placental derivatives are considered biological adjuvants that can accelerate healing through their abundance of extracellular matrix components.
Materials and Methods
Case Presentations
Two patients requiring multiple teeth extractions were included in this study:
Case #1: 57-year-old male with non-salvageable first and second molars
Case #2: 45-year-old male with mandibular and maxillary molars requiring extraction
In both cases, one socket served as the test site (with HPCTM) while the other served as the control.
Surgical Protocol
The surgical procedure involved:
Minimally invasive non traumatic extraction
Socket debridement
Test sites: HPCTM mixed with saline and allograft particles
Control sites: Saline mixed with allograft and collagen fleece
X-shaped sutures to secure grafted particles
Clinical Results and Observations
1
10 Days Post-Op
Control sites showed inflammation and excessive shrinkage, while test sites displayed immature connective tissue with minimal gingival shrinkage.
2
21 Days Post-Op
Test sites exhibited larger areas of developed, healthy connective tissue with voluminous cranial expansion, contrasting with caudal expansion at control sites.
3
30 Days Post-Op
Complete epithelialization was observed in all sites, with test sites maintaining larger socket orifice zones and showing less pronounced collapse compared to control sites.
Biological Mechanisms of HPCTM
Accelerated Healing
Low immunogenicity attracts Macrophages type II
Structural Support
ECM components provide scaffold for cell migration
ECM Components
Collagen , laminin, and fibronectin
The decellularized Human Placenta Connective Tissue Matrix (HPCTM) provide essential extracellular matrix components that, when injected or inserted, create a firm seal and scaffold for fibroblast cells migration. This reduces the  phenomenon where fibroblasts pull wound edges together, causing tissue collapse. The gingival tissue acts as a reservoir of growth factors (TGF-B1, BMP) that regulate bone homeostasis, highlighting the critical role of soft tissue in alveolar ridge dimensional stability.
Comparative Analysis of Healing Patterns
Digital analysis using color mapping confirmed the clinical observations. At 10 days post-op, moderate tissue expansion was observed around socket orifices, with control sites showing more pronounced resorption. By 21 days, control sites exhibited acute collapse while test sites maintained expansion. At 30 days, although both sites showed some collapse, test sites preserved a thin region of enlargement around the socket orifice with less pronounced collapse compared to control sites.
Conclusions and Future Directions
Clinical Benefit
HPCTM as an adjunctive agent in alveolar ridge preservation boosts soft tissue healing in terms of thickness and reduces collapse compared to conventional techniques.
Biological Advantage
The flowable form provides a stable, low immunogenic extracellular matrix that accelerates healing kinetics and supports tissue regeneration.
Future Research
Further studies with larger populations are needed to validate these findings, including bone resorption measurements and histomorphometric quantification.
This proof of concept demonstrates that HPCTM has potential to enhance alveolar ridge preservation outcomes by addressing the soft tissue component of post-extraction healing. By providing a biological scaffold that supports natural healing processes, this approach may simplify treatment steps while improving both functional and aesthetic results.