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Endosseous implants have been established over several decades.

Introduction : Novel expandable short dental implants (1)

author: Waldemar Reich,Ramona Schweyen,Christian Heinzelmann,Jeremias Hey,Bilal Al-Nawas, Alexander Walter Eckert | publisher: drg. Andreas Tjandra, Sp. Perio, FISID

Introduction

Endosseous implants have been established over several decades. The evaluation of treatment results under biomechanical, physiological, psychological, social and economic aspects has been well documented. Furthermore, patient-based outcomes reveal a predictable gain in oral health-related quality of life.

Especially in patients with limited vertical bone height, process of treatment is extensive. Prior to implantation, augmentation procedures are required. Depending on gender, vascularisation and bone mineralisation up to 25% of the primary volume are resorbed due to remodeling of augmented alveolar ridges. Recently, short dental implants have evolved into a promising and reliable treatment option in the orofacial rehabilitation of atrophic mandibles and maxillae, namely as an alternative to vertical ridge augmentation. The prognosis of short implants and patient satisfaction is high.

The definition of short implants in the literature is not uniform. In this present study, we considered short implants with 5–8-mm length. Other authors set the cut-off at 6 mm. According to the recent consensus paper of the 11th European Consensus Conference (EuCC), dental implants are referred to as “short” if their intrabony length measures ≤ 8 mm and considered as “ultra-short” with lengths < 6 mm.

Biomechanical studies show that the crestal bone is strained under axial and extra-axial loading. While bone quality, implant design and position, prosthetic devices and material characteristics contribute to the character of stress distribution, the role of implant length seems to be of underpart. Nevertheless, implant length is crucial in D4 bone quality, and the crown-to-implant length itself influences stress distribution under extra-axial loading in the crestal bone and in the abutment screw. According to Petrie and Williams, the influence of increased implant diameter on stress reduction in the crestal bone is more efficient than increased implant length. Möhlhenrich and co-authors confirmed these findings that ...

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