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Dentomaxillofac Radiol. 2008 Mar;37(3):149-53. doi: 10.1259/dmfr/29131739.

Dose inhomogeneities on surfaces of different dental implants during irradiation with high-energy photons.

Author information

1
Department of Oral and Maxillofacial Surgery, University Clinic Homburg, D-66421 Homburg/Saar, Germany. zmktbin@uniklinik-saarland.de

Abstract

OBJECTIVES:

The aim of this study was to determine the radiation doses in mucosa and bone close to the surface of different dental implant materials.

METHODS:

Radiation dose was measured at the interface of bone or soft tissue and various implant materials for 6 MV photons generated by a medical linear accelerator using a phantom and ultrathin thermoluminescent dosemeters.

RESULTS:

Increasing thickness of implant materials resulted in a dose decrease in bone immediately behind the implants. Directly in front of titanium implants, dose increases of 18.2% and 30.4% were found in bone and soft tissue, respectively, independent of implant thickness and surface structure (polished/plasma coated). Even a titanium coating with 70 microm hydroxyapatite did not affect the scattering dose. In contrast, for aluminium oxide ceramics, a scatter-induced notable dose increase could not be assessed.

CONCLUSIONS:

During irradiation with high-energy photons, an implant-induced dose enhancement could be reduced in bone using the technique of multiple fields and in soft tissue using ceramic abutments.

PMID:
18316506
DOI:
10.1259/dmfr/29131739
[Indexed for MEDLINE]

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