Biomedical subjects

G Faulkner

Publications and source records attributed to G Faulkner.

57 records · Page 4Linked to original sources

PubMedDate not supplied

Assessment of the periotest device in baseline mobility measurements of craniofacial implants.

The present study aimed to evaluate reliability of the Periotest instrument in baseline mobility measurement of craniofacial implants in a human wet bone specimen. Sixteen 4.0-mm craniofacial Brånemark implants were placed in the most common sites for craniofacial implant placement. A 5.5-mm abutment was attached to each implant except one in the mastoid bone, which was connected with a bone-anchored hearing aid (BAHA) abutment. Baseline Periotest values (PTVs) were recorded on each abutment at different vertical measurement points by three different clinicians using three Periotest devices. Baseline PTVs for each abutment ranged between -1.23 and -5.90. Interoperator and interinstrumental variability did not influence PTVs; however, the vertical measurement point on the abutment proved to have a strong effect on PTV recordings.

Aged↗

PubMedDate not supplied

Craniofacial osseointegrated implant-induced strain distribution: a numerical study.

Strain distributions that occur in the hard tissue in the region surrounding craniofacial osseointegrated implants are compared. Three commercially available implant designs were evaluated under both axial loading and axial loading with a moment in three bone configurations typical of the craniofacial region. The evaluations that used the finite element method indicated that for axial loading, the implant designs produced similar strain levels in each bone configuration. When moments as well as vertical loads were applied, the strains were three to seven times higher and variations among the designs were greater. The variations found were related to the amount of bone present in each situation, as well as the neck diameter of the implant involved.

Bone and Bones↗

PubMedDate not supplied

Console abutment loading in craniofacial osseointegration.

Retention of implant-supported facial prostheses presents challenges in design that may lead to use of freestanding abutments. This is particularly so in the midface and orbit. Individual implant success rates are lower in these regions, and bone remodeling capacity may be compromised by combined modality cancer therapy. The present study was undertaken to determine the variations in load delivery so as to compare the use of long cantilevers and offset abutments with freestanding axially loaded abutments. The study revealed not only that the loads delivered are not trivial, but also that the highest loads generated are frequently delivered at the cervix of the implant. The long cantilevers produced the highest laterally acting cervical loads, whereas the 30-degree and 60-degree Console abutments delivered the highest laterally acting cervical loads of all the Console abutments. The potential of long cantilevers and offset abutments to deliver significant loads should be considered when designing retention for a facial prosthesis.

Bone Remodeling↗