Influence of Implant Neck Design on Peri-Implant Tissue Dimensions: A Comparative Study in Dogs
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Autor/esCalvo Guirado, José Luis; Jiménez Soto, Raúl; Pérez-Albacete Martínez, Carlos; Fernández Domínguez, Manuel; Gehrke, Sergio Alexandre; [et al.]
Soft tissue dimensions
Abstract: This in vivo study assessed (hard and soft) peri-implant tissue remodeling around implants with micro-ring and open-thread neck designs placed in a dog model. Twenty histological sections corresponding to four different implant designs that were placed in America Foxhound dogs were obtained from previous studies. All the implants had been placed under identical conditions and were divided into four groups: Group A, micro-rings on implant neck plus 0.5 mm refined surface; Group B, micro-rings on implant neck; Group C, open-thread neck; and, Group D, double-spiral neck. Eight weeks after surgery, the integrated implants were removed and processed for histological examination. Crestal bone loss and bone-to-implant contact was greater for micro-ring necks than open-thread necks. Soft tissues showed significant differences on both buccal and lingual aspects, so that the distance from peri-implant mucosa to the apical portion of the barrier epithelium was smaller in the micro-ring ...