The goal of implant prosthetic therapy is a predictable and stable long-term result of the restoration of lost teeth. One of the factors contributing to its long-term success is the stability of the crestal bone surrounding the implant. To ensure this bone stability around the implant, biological principles need to be followed. The quantity and quality of soft tissue around the implant are important factors for the stability of the crestal bone. By choosing the type of implants as well as their position, we can influence the amount of soft tissue around them. By using implants with a variable platform, a conical connection and their subcrestal position, we provide greater vertical thickness of soft tissues. This way, we ensure the creation of an adequate biological width around the implant. All these factors guarantee a favourable clinical situation for the production of prosthetic superstructure and provide stable long-term conditions without the risk of losing soft and hard tissue around the implant. Respecting biological principles, we are not only able to compensate for the function of lost teeth but also to meet all aesthetic criteria that challenge us in the implant prosthetic therapy. This paper presents a clinical case of oral rehabilitation in the area of the lower left second molar in a 56-year-old patient. Three years ago, patient visited the dental office and complained about the pain in the area of the lower left second molar. Radiographic analysis revealed an extensive periradicular process, which was not treatable with conservative endodontic treatments. Extraction of the tooth in question was suggested to the patient, postposing the implantation for four months. Patient's private circumstances led to postponing the implantation for 3 years. During the implantation, an implant with a wide conical connection was placed subcrestally. Such subcrestal position of the implant is performed in patients with a thin biotype of mucosa, with the aim of increasing the vertical thickness of the soft tissues. Implants are positioned subcrestally in the following cases: when the soft tissue is less than 3 mm thick, when at least 12 mm of the bone is located coronally from the vital anatomical structures that need to be avoided (lower alveolar nerve, maxillary sinuses, nasal cavity, etc.) and when at least 1 mm of bone is present buccally and lingually after placing the implant.