Preclinical Evaluation of a Crown-Splinted Custom Root-Shaped Implant

The International Journal of Oral & Maxillofacial Implants
Elias D KontogiorgosL A Opperman

Abstract

To test whether a Maryland bridge-type splint provides adequate stability for a custom root-shaped implant to osseointegrate in a manner substantially equivalent to that of a threaded implant. Six beagle dogs were subjected to intraoral impressions and cone beam scans that were used to fabricate custom root-shaped implants (RTIs) and crowns. Premolars in the mandible (P4) and in the maxilla (P3) were extracted, and 24 RTIs were immediately placed in extraction sockets. Splint extensions of the crowns were bonded to mesial and distal teeth. Twelve mandibular molars (M2) were extracted, and threaded implants (DXI), serving as controls, were placed immediately. Animals were placed on a soft diet after surgery. Weekly intraoral photographs and radiographs were taken, and animals were sacrificed at 4 months. Fluorescent labels were injected 35, 21, and 7 days before sacrifice. Clinical implant stability and vertical pullout forces were tested, and loss of vertical bone height was measured on radiographs. Histomorphometric measurements of percent bone-to-implant contact (BIC) and mineral apposition rates were made from undecalcified sections. Three RTI splints broke or debonded, and the implants were removed. No loss of DXI implants ...Continue Reading

Citations

Jun 18, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Franziska EhlickeJan Hansmann

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