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SEM Morphologic Changes of the Dentin Following Placement of the Self-threading Pins

Suzana Ferk ; Zavod za bolesti zubi, Stomatološki fakultet Sveučilišta u Zagrebu Klinička Bolnica Dubrava Zagreb, Zagreb, Hrvatska
Sanja Šegović ; Zavod za bolesti zubi, Stomatološki fakultet Sveučilišta u Zagrebu Klinička Bolnica Dubrava Zagreb, Zagreb, Hrvatska
Ivica Anić ; Zavod za bolesti zubi, Stomatološki fakultet Sveučilišta u Zagrebu Klinička Bolnica Dubrava Zagreb, Zagreb, Hrvatska
Berislav Perić ; Zavod za oralnu kirurgiju Stomatološki fakultet Sveučilišta u Zagrebu Klinička Bolnica Dubrava Zagreb, Zagreb, Hrvatska

Sažetak

In this in vitro study the occurrence o f dentinal crazing following the placement of self-threading pins by two methods was observed by SEM. The crowns o f 12 nonacarious third molars were resected 2 mm
above the cementoenamel junction, and occlusal parts were discarded. Three pin channels were prepared using the handpiece (at the speed of 30000 rpm) in each sample. Pins were placed manually and with motor drive. The third, control, pinhole was without a pin. After the dehydration in ascending grades of alcohol, specimens were examined by SEM. Craze lines in dentine were recorded in 55% of samples where placed manually and 50% o f samples with pins placed the handpiece. In the control pinholes, the craze lines appeared in 17% o f samples. The results showed that there is no significant difference in the occurrence of craze lines between pins seated manually of with the motor drive (handpiece).

Ključne riječi

craze lines in dentine; self-threading pins; methods of pin placement

Hrčak ID:

98618

URI

https://hrcak.srce.hr/98618

Datum izdavanja:

15.3.1996.

Podaci na drugim jezicima: hrvatski

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