## 1 Introduction  
Implant dentistry has evolved over the past five decades, becoming a highly predictable treatment modality for partial and completely edentulous patients [1]. It yields excellent long-term results and a survival rate of 93.2% after a ten-year follow-up period [2]. The first requirement for a successful implant is having an adequate volume of bone vertically and horizontally surrounding the implant; long-term prognosis and implant survival may be poor otherwise [3]. Multiple factors can make it difficult to maintain the bone volume necessary for placing implant fixtures, including periodontal inflammation [4], peri-apical pathology [5], and dental extraction [6]. Tooth extractions take place for many reasons, including caries, tooth fractures, periodontal disease, and severe infections that could adversely affect the patient's dietary habits and general health [7]. Following a dental extraction, the bundle bone surrounding the tooth socket is lost, and gradual resorption of alveolar bone then occurs throughout the patient's life [8]. This process occurs in two stages; in the first stage, which spans the first eight weeks, the bundle bone is quickly replaced by woven bone due to osteocl activity, causing a significant reduction in the socket height because the socket is made of bundle bone alone [9]. In the late stage, the outer surface of the alveolar bone begins to be remodeled, causing it to atrophy in both the vertical and horizontal dimensions. This has been attributed to the absence of dentition [9]. This resorption causes the ridge morphological structure to change substantially, which affects the vertical dimension more than the horizontal, with a reported vertical dimensional change of 11-22% and horizontal dimensional change of 29-63% six months following dental extraction [8]. This could jeopardize implant placement, resulting in compromised function and aesthetics [10]. To minimize bone remodeling, various ridge preservation techniques have been proposed [11]. Alveolar ridge preservation (ARP) is defined by the American Academy of Periodontology (AAP) as a surgical procedure aimed at preventing ridge collapse and preserving the ridge dimensions after tooth extraction [11]. Numerous systematic reviews have shown that it can significantly minimize resorption in the alveolar ridge, both vertically and horizontally [12; 13]. The gold standard for augmenting the socket is autogenous bone obtained either intra-orally from the maxillary tuberosity or mandibular ramus and symphysis or extra-orally [14]. However, this type of graft comes with several disadvantages, such as the fact that it requires a second round of surgery, the fact that only a limited quantity of bone can be collected at once, the potential for morbidity at the donor site, the unpredictability of the bone quality, and postoperative discomfort [14]. Therefore, other forms of bone substitutes from other origins, such as allografts, xenografts, and alloplastic materials, have been introduced in clinical practice [15], showing comparable results regarding gains in bone volume as autogenous bone [16; 17]. Besides bone substitutes, multiple materials have been used to regenerate bony defects, such as recombinant human bone morphogenetic protein 2 (BMP2), enamel matrix derivatives (EMD), and stem cells [18]. They are commonly used adjuncttively with bone grafts to treat bony defects; however, these treatment modalities are often expensive and painful [19]. To further improve the osteogenic potential of bone substitutes, autologous platelet concentrates such as platelet-rich fibrin have been utilized [11]. Platelet-rich fibrin (PRF), a second-generation platelet concentrate, was recently utilized as a grafting material due to its ability to lessen the inflammation of the periodontal tissues, prevent microbial infection, and improve the repair of alveolar bone defects, thereby enhancing bone regeneration [20].