The International Journal of Oral & Maxillofacial Implants, 02/1988

This article seeks to give the clinician insight into the design process and biomaterial/biomechanical aspects of endosseous implant design. Specific facets considered relate to materials, implant shape, special surface coatings, shock-absorbers, and the implant-tissue interface. Keywords: biomaterials, biomechanics, design, forces, interface, stress transfer

The evolution of cylindrical endosseous dental implants is outlined. Clinical verification, indications, contraindications, and other considerations in the use and possible abuse of cylindrical implants are discussed. Biological, biomechanical, and biomaterial refinements, as well as the functional and esthetic features of the current Vent-Plant Osseointegrated Compatible Implant System, are described. Keywords: aluminum, bone like microstructure, cylindrical endosseous implant, ion beam sputtering, osseointegration, Osseolock, plasma spray, Resilient Abutment Cylinder, Robutment, semisubmerged, self-tapping screw, titanium, Vent-Plant

Bone induction and conduction by demineralized bone matrix (DBM) implantation can aid union in experimental bone defects of a poor healing capacity. In this study the effects of DBM in defects with highly favorable healing conditions were observed. A dividable titanium implant with a transverse bone ingrowth canal (Bone Harvest Chamber) was inserted in each rabbit tibia. Under normal conditions bone will invariably invade the bone ingrowth canal from both ends and fuse in the middle. In one chamber, a needle-like allogenous DBM implant was deposited in the canal, occupying less than 20% of its volume; another chamber in the contralateral extremity of the same animal served as control. After 14 days, the bone mass in the DBM-treated canal was diminished to 65% of that of the control, although the DBM itself was largely resorbed. This was in spite of the fact that the DBM used had inductive properties verified by its capacity to induce bone formation at an intramuscular site. The results suggest that DBM cannot be used to speed up bone healing under already favorable healing conditions, as is represented by the BHC model. Keywords: artificial implants, bone regeneration, osteogenesis

Fixed prostheses supported by osseointegrated implants ad modum Brånemark have been used for many years Keywords: osseointegrated implants, overdentures

The linear polarization method has been used to demonstrate the influence of different electrolytes on the corrosion behavior of Ti, Ni-Ti, and Co-Cr-Mo. Results revealed minimal corrosion tendency for Ti; Co Cr-Mo, and especially Ni-Ti, showed rapid breakdown of passivity with increasing chloride concentrations in unbuffered solutions and little differences in buffered solutions. Keywords: artificial body fluids, anodic polarization, corrosion, EDX, implant materials, plasma flame spray coating, SEM

With the use of a new castable magnetic alloy it is possible to simplify the fabrication of an attachment for retaining a facial prosthesis. A case report of resection of an extensive basal cell carcinoma followed by restoration of the cheek and auricle using bone-anchored support is presented. Keywords: auricle-replacement, magnetic alloy