Apical pressure created during irrigation with the GentleWave™ system compared to conventional syringe irrigation.

Abstract:

OBJECTIVES:The purpose of this study is to compare pressures at the apical foramen created by conventional syringe irrigation and the GentleWave™ System, which releases high-velocity degassed irrigants to the pulp chamber and uses broad-spectrum sound energy for cleaning. MATERIALS AND METHODS:The apical pressure generated during irrigation was measured for palatal and distobuccal root canals of four extracted maxillary molars after no instrumentation, minimal instrumentation to a size #15/.04, instrumentation to a size #40/.04 taper, and after perforating the apical foramen to size #40. The root canals opened into an air-tight custom fixture coupled to a piezoresistive pressure transducer. Apical pressures were measured for the GentleWave™ System and syringe-needle irrigation at different irrigant flow rates, with the needle tip at 1 and 3 mm from the apical foramen using 30-gauge (G) open-ended or side-vented safety tip needles. RESULTS:The GentleWave™ System generated negative apical pressures (P < 0.001 compared with syringe irrigation); the mean pressures were between -13.07 and -17.19 mmHg. The 30 G needles could not reach the 1 and 3 mm from the working length in uninstrumented and 1 mm in minimally instrumented canals. The mean positive pressures between 6.46 and 110.34 mmHg were measured with needle irrigation depending on the flow rate, needle insertion depth, and size of the root canal. CONCLUSIONS:The GentleWave™ System creates negative pressure at the apical foramen during root canal cleaning irrespective of the size of canal instrumentation. Positive apical pressures were measured for syringe irrigation. CLINICAL RELEVANCE:Negative pressure during irrigation contributes to improved safety as compared to high-positive pressure.

journal_name

Clin Oral Investig

authors

Haapasalo M,Shen Y,Wang Z,Park E,Curtis A,Patel P,Vandrangi P

doi

10.1007/s00784-015-1632-z

subject

Has Abstract

pub_date

2016-09-01 00:00:00

pages

1525-34

issue

7

eissn

1432-6981

issn

1436-3771

pii

10.1007/s00784-015-1632-z

journal_volume

20

pub_type

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