BACKGROUND: A temperature rise of more than 10°C for 1 minute on the outer root surface may result in periodontal damage. The goal of this study is to evaluate the temperature rise on the outer root surface using continuous wave condensation (System B®) and thermomechanical compaction (Revo Condensor®). MATERIALS AND METHODS: Five single-rooted elements with constant taper were prepared and obturated with both the continuous condensation wave technique, at 5 and 3 mm from the apical foramen, and the thermomechanical compaction technique, at the speed of 40000 rpm and 11000 rpm. Temperature detection was performed with an infrared camera. RESULTS: At 5 mm from the working length, the 5-second continuous motion with System B® demonstrated a thermal increase of 17.4(±1.8)°C compared with the continuous motion of only 2 seconds of 7.8(±1.9)°C. At 3 mm from the working length, the thermal increase was 16.2(±1.3)°C with continuous movement; in contrast, only 8.8(±1.3)°C with discontinuous movement. The Revo Condensor at 40,000 rpm for 15 seconds caused a thermal rise of 10.6(±1.3) °C compared with the same technique with preheated Microseal gutta-percha alone of 15(±1)°C; at 11000 rpm were 9.8(±0.4)°C and 7.2(±0.4)°C, respectively. All differences were statistically significant (P<0.05). CONCLUSIONS: The System B® and Revo Condensor® exceeded the damage temperature under some conditions. However, at 3 seconds after the end of the filling, adequate working length and speed enabled the return to a safe temperature
BACKGROUND: un aumento della temperatura di oltre 10°C per 1 minuto sulla superficie radicolare esterna può comportare un danno parodontale. Scopo del presente lavoro è quello di valutare l’aumento di temperatura ottenuto con l’utilizzo dell’onda continua di condensazione(System B®) e della compattazione termomeccanica(Revo Condensor®) MATERIALI E METODI: sono stati preparati cinque elementi monoradicolati a conicità costante e otturati sia con la tecnica dell’onda continua di condensazione, a 5 e a 3 mm dal forame apicale, sia con la tecnica di compattazione termomeccanica, alla velocità di 40000 rpm e 11000 rpm. La rilevazione della temperatura è stata eseguita con termocamera ad infrarossi. RISULTATI: a 5 mm dalla lunghezza di lavoro il movimento di 5 secondi continuo con System B® ha dimostrato un aumento termico di 17.4(±1.8)°C rispetto al movimento continuo di soli 2 secondi di 7.8(±1.9)°C. A 3 mm dalla lunghezza di lavoro l’aumento termico è stato di 16.2(±1.3)°C con movimento continuo e di 8.8(±1.3)°C con un movimento discontinuo. Il Revo Condensor® a 40.000 rpm per 15 secondi ha provocato un innalzamento termico di 10.6(±1.3)°C rispetto alla stessa tecnica con la sola guttaperca preriscaldata Microseal di 15(±1)°C; a 11000 rpm gli aumenti sono stati rispettivamente di 9.8(±0.4)°C e 7.2(±0.4)°C. Tutte le differenze sono risultate statisticamente significative (P<0.05). CONCLUSIONI: System B® e Revo Condensor® hanno superato la temperatura di danno in alcune condizioni. Tuttavia, a 3 secondi dalla fine dell’otturazione, adeguate lunghezza di lavoro e velocità hanno consentito il ritorno ad una temperatura di sicurezza.
Cambiamenti di temperatura sulla superficie radicolare con due diverse tecniche di otturazione canalare: una valutazione in vitro
GALUPPI, LORENZO
2022/2023
Abstract
BACKGROUND: A temperature rise of more than 10°C for 1 minute on the outer root surface may result in periodontal damage. The goal of this study is to evaluate the temperature rise on the outer root surface using continuous wave condensation (System B®) and thermomechanical compaction (Revo Condensor®). MATERIALS AND METHODS: Five single-rooted elements with constant taper were prepared and obturated with both the continuous condensation wave technique, at 5 and 3 mm from the apical foramen, and the thermomechanical compaction technique, at the speed of 40000 rpm and 11000 rpm. Temperature detection was performed with an infrared camera. RESULTS: At 5 mm from the working length, the 5-second continuous motion with System B® demonstrated a thermal increase of 17.4(±1.8)°C compared with the continuous motion of only 2 seconds of 7.8(±1.9)°C. At 3 mm from the working length, the thermal increase was 16.2(±1.3)°C with continuous movement; in contrast, only 8.8(±1.3)°C with discontinuous movement. The Revo Condensor at 40,000 rpm for 15 seconds caused a thermal rise of 10.6(±1.3) °C compared with the same technique with preheated Microseal gutta-percha alone of 15(±1)°C; at 11000 rpm were 9.8(±0.4)°C and 7.2(±0.4)°C, respectively. All differences were statistically significant (P<0.05). CONCLUSIONS: The System B® and Revo Condensor® exceeded the damage temperature under some conditions. However, at 3 seconds after the end of the filling, adequate working length and speed enabled the return to a safe temperatureFile | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/50593