Dental Adverse Effects Following Multimodality Treatment for Head and Neck Rhabdomyosarcoma: Results of a Trans-Atlantic Multicentre Study.

Introduction: As survival of paediatric cancer improves, more emphasis is placed on late adverse effects. However, the dental and periodontal adverse effects of cancer treatments in children remain an underinvestigated complication. This study aims to investigate the prevalence of late clinical dental adverse effects (cDAE) in survivors of paediatric head and neck rhabdomyosarcoma (HNRMS).

Diagnostic image quality of hand-held and wall-mounted X-ray devices in bitewing radiography: a non-inferiority clinical trial.

Objectives: The present clinical trial was intended to clarify whether subjective assessments of diagnostic X-ray image quality achieved via hand-held (HH) Nomad Pro 2 (KaVo Kerr, Brea, CA, USA) X-ray device is non-inferior that of the wall-mounted (WM) KaVo Focus (KaVo Dental, Bieberich, Germany).

Methods: A prospective, cross-over, and non-inferiority clinical trial was conducted to compare these two diagnostic modalities. Based on sampling calculations, 205 patients were selected for study, generating 410 paired bitewing radiographs in randomized sequence.

Ambient dose during intraoral radiography with current techniques: part 3: effect of tube voltage.

Objectives: This study was conducted to assess the impact of tube voltage on ambient dose during intraoral radiography, specifically remnant-beam transmission and scattered radiation.

Methods And Materials: Remnant-beam and scattered radiation doses were recorded using a phantom at tube voltages of 60, 63, 66 and 70 kV. Mathematical equations depicting their relations were then formulated, and reference values were calculated at the various voltages tested.

An overview of radiological manifestations of acquired dental developmental disturbances in paediatric head and neck cancer survivors.

Objectives: In paediatric cancer survivors treated with chemotherapy and radiotherapy therapy, late effects on dental development are quite common. Oral radiologists are not familiar with the radiographic images of these specific dental consequences of chemotherapy and radiotherapy. With the goal of educating colleagues, to raise awareness of the needs of survivors, and to identify directions for future research, we present dental radiographs of survivors treated for head and neck rhabdomyosarcoma with chemotherapy and radiotherapy.

Precision of aiming with a portable X-ray device (Nomad Pro 2) compared to a wall-mounted device in intraoral radiography.

Methods And Materials: 20 operators obtained intraoral radiographs of four regions (bitewing, upper molar, lower molar and upper anterior) in five mannequins, using HH and WM devices. Beam-aiming devices were fitted with metal cross-wires to project on image sensors. Deviation from ideal perpendicular incidence of beam was calculated, based on positions of cross-wires relative to gold-standard positions ( average of 10-fold precise aiming by authors via WM system).

Ambient dose during intra-oral radiography with current techniques: Part 2 quantifying the remnant beam - an in vivo study.

Objectives:: (1) To find a safe reference transmission factor for the remnant beam to be used when assessing the remnant beam during intra-oral radiography. (2) To identify factors such as exposure type, side (left or right), gender and age that might significantly affect transmission.

Methods:: Measurements were performed in the remnant beam during 323 intra-oral exposures of 43 patients.

Ambient dose during intraoral radiography with current techniques: Part 1 conversion factor for scattered radiation using a rectangular collimator.

Objectives:: The aim of this study was to establish a conversion factor for assessing the scattered radiation produced during intraoral radiography with a rectangular collimator in areas where the remnant beam is not present. The dose level in the remnant beam will be addressed in another study.

Methods:: A radiological phantom (Rando) in the upright position was exposed to radiation delivered by a Planmeca Intra X-ray unit over 9 exposure geometries (right side of a full mouth series).

The value of thyroid shielding in intraoral radiography.

Objectives: To evaluate the utility of the application of a thyroid shield in intraoral radiography when using rectangular collimation.

Methods: Experimental data were obtained by measuring the absorbed dose at the position of the thyroid gland in a RANDO(®) (The Phantom Laboratory, Salem, NY) male phantom with a dosemeter. Four protocols were tested: round collimation and rectangular collimation, both with and without thyroid shield.