Exposure of patient and dental staff to fine and ultrafine particles from scanning spray

TY - JOUR

T1 - Exposure of patient and dental staff to fine and ultrafine particles from scanning spray

AU - Rupf, Stefan

AU - Berger, Hendrik

AU - Buchter, Axel

AU - Harth, Volker

AU - Ong, Mei Fang

AU - Hannig, Matthias

PY - 2015/5/1

Y1 - 2015/5/1

N2 - OBJECTIVES: Sprays containing fine and ultrafine particles are commonly used for optical scanning. The aim of this study was to measure the particle exposure of patient and dentist during application of scanning spray and to evaluate measures for its reduction.MATERIALS AND METHODS: A lower molar in a dental simulator was powdered with scanning spray. Patient's particle exposure was measured by a condensation particle counter in the nasal region of the simulator without (P) and with rubber dam (PC). Dentist's exposure (D) was measured behind a surgical mask. Particle concentrations were determined 5-fold without suction (NS), using conventional dental suction (CDS), or high volume evacuation (HVE).RESULTS: Mean background air particle concentrations for the patient were 3.3 × 10(3) and 1.3 × 10(3) pt/cm(3) for the dentist. Particle concentrations increased after spraying; mean cumulated additional particle exposures for the patient were the following: P-NS 7.2 × 10(6), P-CDS 4.6 × 10(6), P-HVE 2.4 × 10(4); using rubber dam: PC-NS 3.6 × 10(6), PC-CDS 3.3 × 10(5), PC-HVE 2.2 × 10(5). The particle exposures of the dentist were the following: D-NS 9.7 × 10(5), D-CDS 1.8 × 10(5), D-HVE 1.6 × 10(4).CONCLUSIONS: The use of HVE is recommended to reduce exposure of patients and dental staff to fine and ultrafine particles when using scanning sprays.CLINICAL RELEVANCE: Effective protection is available for staff and patient by means of high volume evacuation. In patients suffering from obstructive lung diseases, the use of scanning sprays should be avoided altogether.

AB - OBJECTIVES: Sprays containing fine and ultrafine particles are commonly used for optical scanning. The aim of this study was to measure the particle exposure of patient and dentist during application of scanning spray and to evaluate measures for its reduction.MATERIALS AND METHODS: A lower molar in a dental simulator was powdered with scanning spray. Patient's particle exposure was measured by a condensation particle counter in the nasal region of the simulator without (P) and with rubber dam (PC). Dentist's exposure (D) was measured behind a surgical mask. Particle concentrations were determined 5-fold without suction (NS), using conventional dental suction (CDS), or high volume evacuation (HVE).RESULTS: Mean background air particle concentrations for the patient were 3.3 × 10(3) and 1.3 × 10(3) pt/cm(3) for the dentist. Particle concentrations increased after spraying; mean cumulated additional particle exposures for the patient were the following: P-NS 7.2 × 10(6), P-CDS 4.6 × 10(6), P-HVE 2.4 × 10(4); using rubber dam: PC-NS 3.6 × 10(6), PC-CDS 3.3 × 10(5), PC-HVE 2.2 × 10(5). The particle exposures of the dentist were the following: D-NS 9.7 × 10(5), D-CDS 1.8 × 10(5), D-HVE 1.6 × 10(4).CONCLUSIONS: The use of HVE is recommended to reduce exposure of patients and dental staff to fine and ultrafine particles when using scanning sprays.CLINICAL RELEVANCE: Effective protection is available for staff and patient by means of high volume evacuation. In patients suffering from obstructive lung diseases, the use of scanning sprays should be avoided altogether.

U2 - 10.1007/s00784-014-1300-8

DO - 10.1007/s00784-014-1300-8

M3 - SCORING: Journal article

C2 - 25096672

VL - 19

SP - 823

EP - 830

JO - CLIN ORAL INVEST

JF - CLIN ORAL INVEST

SN - 1432-6981

IS - 4

ER -