Caroliene Meijndert

82 Chapter 5 knowledge, only a few studies have reported the use of this newly designed implant system in compromised bone (Caiazoo et al., 2019; Levine et al., 2019; Pariente et al., 2020). However, a full-scale assessment desribing parameters such as primary stability, marginal bone level change, change in clinical peri-implant parameters, aesthetic outcome, patient-reported outcomes is lacking. Therefore, the purpose of this prospective observational case series was to perform a full-scale assessment of clinical, radiographic, aesthetic and patient-reported outcomes of single-tooth bone level tapered implants with immediate provisionalization after alveolar ridge preservation in the maxillary aesthetic zone over a one-year follow- up period. Materials and Methods Study design The study was designed as a prospective clinical case series on 30 consecutive patients requesting implant treatment for a single failing tooth in the maxillary aesthetic zone but for whom immediate implant placement was not possible. Recruitment and inclusion of patients took place at the Department of Oral and Maxillofacial Surgery of the University Medical Center Groningen, the Netherlands, from January 2016 until December 2017. The research protocol was approved by the Medical Ethics committee of the UMCG (METc 2015.517). The trial was registered in the Dutch trial register (Trial ID: NL8755). Informed consent was signed by all the participants prior to treatment. This manuscript was constructed according to the STROBE guidelines for cohort studies (von Elm et al., 2014). Participants The inclusion criteria were: − treatment site in the anterior maxilla (first premolar to first premolar) − a single failing tooth and in need of ridge preservation prior to implant placement because of a vertical buccal bone wall defect of >5mm of the extraction socket, assessed after tooth extraction by bone sounding technique; − presence of natural teeth on both sides of the planned implant site; − at least 18 years of age at the time of treatment; − the patient is capable of understanding and giving informed consent.