This systematic review aimed to evaluate the effectiveness of teriparatide (TP) in guided bone regeneration (GBR). An electronic search without language or date restrictions was performed in PubMed, Web of Science, Scopus, Scielo, and gray literature for articles published until June 2025. Inclusion criteria considered studies evaluating the effect of TP on bone regeneration, analyzed using SYRCLE’s Risk of Bias tool. Twenty-four preclinical studies were included, covering diverse craniofacial models (mandibular, calvarial, extraction sockets, sinus augmentation, distraction osteogenesis, segmental defects) and employing systemic or local TP administration. Teriparatide consistently enhanced osteogenesis, graft integration, angiogenesis, and mineralization, with potentiated effects when combined with various biomaterials, including polyethylene glycol (PEG), hydroxyapatite/tricalcium phosphate (HA/TCP), biphasic calcium phosphate (BCP), octacalcium phosphate collagen (OCP/Col), enamel matrix derivatives (EMDs), autografts, allografts, xenografts (Bio-Oss), strontium ranelate, and bioactive glass. Critically, most studies presented a moderate-to-high risk of bias, with insufficient randomization, allocation concealment, and blinding, which limited the internal validity of the findings. TP shows promising osteoanabolic potential in guided bone regeneration, enhancing bone formation, angiogenesis, and scaffold integration across preclinical models. Nonetheless, its translation to clinical practice requires well-designed human randomized controlled trials to define optimal dosing strategies, long-term safety, and its role in oral and craniomaxillofacial surgical applications.

Background: Dental extraction is a common procedure in dentistry. It is accompanied by postoperative pain and inflammation. In addition, it decreases bone volume and density. Vitamin C is an antioxidant and cofactor that promotes the synthesis and maturation of collagen, the proliferation and migration of fibroblasts and osteoblasts, accelerating the final phase of inflammation, promoting healing. The objective of this scoping review is to evaluate the effectiveness of vitamin c in dental alveolus healing after extraction and synthesize the available evidence and tits clinical implications. Material and Methods: This review is registered on the Open Science Framework platform (https://osf.io/bstwk/). It was carried out under the PRISMA-ScR protocol, using the question: Is vitamin C effective in alveolar healing in patients undergoing dental extraction? The Pubmed/MEDLINE, Scopus, Web of Science and OPENGREY databases were used. Limiting itself to primary studies. Results: A total of 287 articles were identified, applying selection criteria, 3 were included. Of a total of 135 patients, 59.8% were administered vitamin C; 46.6% 600 mg, 34.2% 500 mg and 19.2% 1500 mg. A decrease in pain, inflammation, probing depth and mesiodistal length of the socket was observed. Conclusions: The role of vitamin C is essential for healing, and therefore, bone regeneration after tooth extraction, reducing adverse effects such as pain and inflammation. Its administration is recommended to promote postoperative recovery. More studies are suggested to observe its effects in oral and maxillofacial surgery.

Down Syndrome (DS), caused by an extra chromosome 21, has a prevalence of 24.7 per 10,000 live births in Chile, the highest in Latin America. Individuals with DS commonly present orofacial and dental anomalies, complicating oral health management. Many depend on removable prostheses, which represent challenges in hygiene, handling, and adaptation. Dental implants are a promising alternative, offering improved stability and functionality. However, successful rehabilitation requires addressing specific anatomical, physiological, and behavioral considerations. This scoping review compiles evidence-based strategies to guide implant treatment in this population. Registered on the Open Science Framework (https://osf.io/bstwk/), this review followed the PRISMA-ScR protocol, addressing the question: "Which are the management strategies and survival rates of dental implants in patients with Down Syndrome?" Searches were conducted in Pubmed/MEDLINE, Scopus, Science Direct, Web of Science, and Ebsco databases. Of 92 studies identified, 7 met inclusion criteria, encompassing 179 implants in DS patients. Anesthesia type varied based on patient cooperation and procedure complexity: general anesthesia for uncooperative patients, local anesthesia for compliant individuals, and sedation for intermediate cases. Delayed loading (3-12 months) yielded better outcomes than immediate loading. Overdentures with locator or bar systems were effective and easier to maintain, while screw-retained fixed prostheses provided stability but required strict hygiene adherence. Clinical success rates varied, with higher success in simple cases and higher failure rates in studies involving multiple implants. Dental implants, combined with structured behavioral management, improve oral rehabilitation outcomes in DS patients. While sedation or general anesthesia may be required, associated risks must be carefully managed. Delayed implant loading is recommended to minimize osseointegration failures. An interdisciplinary approach, including material selection, caregiver education, and long-term maintenance, is essential for successful, individualized outcomes.

Introduction: Tooth loss leads to a series of morphological changes associated with alveolar bone resorption, which represents a limitation in rehabilitation treatments with dental implants. Various techniques and biomaterials have been developed to promote bone regeneration in this context. Angiogenesis plays an essential role in osteogenesis by facilitating the supply of nutrients and oxygen necessary for the formation of new bone tissue. This study aims to evaluate the expression of angiogenic (vWF, CD31) and osteogenic (OCN) markers in native and regenerated alveolar bone after maxillary sinus elevation with freeze-dried particulate allograft and fibrin-rich plasma (PRF). Materials and Methods: Bone biopsies from three patients, obtained between 6 and 8 months after the regeneration procedure, were analyzed. The samples were divided into caudal (native bone) and cranial (regenerated bone) areas and processed for histological analysis by optical and confocal microscopy, with immunostaining for vWF, CD31, and OCN. Results: Angiogenic markers were identified in both zones, with higher microvascular density in areas adjacent to graft particles. Osteocalcin showed evident expression in the regenerated bone, with the presence of osteoid tissue and reticular bone in formation, indicating osteogenic activity. Conclusions: This pilot case series demonstrates the involvement of angiogenesis and osteogenesis in alveolar bone regeneration following sinus elevation with PRF and allograft. The findings support the biological viability of this combination and justify further studies with larger sample sizes and quantitative analysis.