Paul Andrei Nistor

Background/Objectives: To evaluate the clinical effects of alveolar ridge preservation using a hyaluronic acid-based product combined with a resorbable collagen cone compared with spontaneous healing. Methods: In this prospective pilot comparative clinical study, extraction sockets were treated either with hyaluronic acid and a collagen cone (test group) or left to heal spontaneously (control group). Mesial and distal ridge height changes (ΔHm, ΔHd), ridge width reduction (ΔW), buccal mucosal thickness changes (ΔTmb), and occlusal mucosal thickness at 3 months (TmoT3) were assessed. Early wound healing was appreciated at 14 days follow-up, and postoperative complications after 7 and 14 days. Results: Complete 3-month follow-up data were available for 18 test and 14 control patients. Mesial bone loss was significantly lower in the test group than in controls [test ΔHm = 1.0 (1.0–1.0) vs. control ΔHm = 2.0 (1.0–2.0); p < 0.001]. Horizontal ridge width reduction was significantly lower in the test group [ΔW = 1.0 (1.0–1.0) vs. 2.0 (1.0–2.0); p = 0.021]. Buccal mucosal thickness was better maintained in the test group [ΔTmb = 0.0 (0.0–0.5) vs. 1.0 (0.5–1.0); p < 0.001], while TmoT3 was greater in the test group, in an exploratory analysis (p = 0.049). A statistically significant difference in early wound-healing scores favoring the test group was observed [4.0 (4.0–5.0) vs. 4.0 (3.0–4.0); p = 0.032]. No statistically detectable difference in postoperative complications was observed between groups. Conclusions: Alveolar ridge preservation was associated with reduced mesial vertical and horizontal dimensional changes and more favorable soft tissue outcomes compared with spontaneous healing. These preliminary findings should be considered hypothesis-generating.

Background/Objectives: Tooth extraction induces significant alveolar ridge dimensional changes and soft tissue modifications, often leading to challenges in implant placement or conventional prosthetic rehabilitation. Alveolar Ridge Preservation (ARP) strategies aim to mitigate post-extraction resorption of the alveolar ridge, enhancing both the quality and quantity of bone and soft tissue during healing. Hyaluronic acid (HYA) has emerged as a promising biological agent for ARP due to its osteoinductive, antimicrobial, and anti-inflammatory properties. However, the effects of HYA in ARP remain inconsistently reported. This study aims to assess current clinical and preclinical evidence regarding the biological effects of HYA and its application in ARP. Additionally, it evaluates HYA’s impact—alone or in combination with other products—on hard and soft tissue dimensional changes, early wound healing, and implant success rates. Methods: A comprehensive electronic literature search was conducted, and studies meeting the inclusion criteria were critically evaluated. Relevant data were extracted from the final selection of articles. Results: Thirteen publications were evaluated. Some studies reported a significantly improved newly formed bone following ARP with intra-socket HYA application as a single approach (p = 0.004). Combining HYA with a bone graft and a free palatal graft resulted in significantly greater amounts of newly formed and mature bone, reduced clinical bone width changes, lower radiographic crestal bone loss (p < 0.01), and diminished radiological volumetric and linear bone resorption (p = 0.018). Short-term follow-up data indicated improved soft tissue healing associated with HYA-based ARP. While HYA appears to have a protective effect on ridge dimensional changes in ARP, other studies reported no significant differences in radiographic bone dimensional changes or soft tissue improvement. Conclusions: The addition of HYA to bone grafts may enhance some ARP outcomes. However, the variability in outcomes and methodologies across the evaluated studies precludes drawing definitive clinical conclusions. Further robust research is needed to clarify HYA’s role in ARP. With respect to clinical significance enhancing the understanding of ARP management strategies and their effects on post-extraction sockets empowers clinicians to make more informed decisions. The knowledge of HYA effects facilitates the selection of personalized ARP approaches tailored to optimize outcomes for subsequent interventions.