Usporedba kvalitete brtvljenja biokeramičkog materijala u retrogradnim kavitetima izrađenim svrdlom, ultrazvukom i Er:YAG laserom

master's thesis

• Title (english): Comparison of apical sealing ability of bioceramic materials in retrogade cavities prepared with bur, ultrasonic and Er:YAG laser
• Author: Janja Sačić
• Mentor: Ivona Bago (mentor)
• Committee member: Ivona Bago (predsjednik povjerenstva)
• Committee member: Dragana Gabrić (član povjerenstva)
• Committee member: Eva Klarić Sever (član povjerenstva)
• Granter: University of Zagreb; School of Dental Medicine; (Department of Endodontics and Restorative Dentistry); Zagreb
• Defense date and country: 2017-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine; Endodonics and Restorative Dentistry

Abstract

Svrha ovog preglednog rada je predstaviti i usporediti rezultate dosadašnjih istraţivanja kvalitete brtvljenja biokeramičkih materijala u retrogradnim kavitetima izraĎenim svrdlom, ultrazvukom i laserom.
Uspjeh apikotomije s retrogradnim punjenjem ovisi o obliku retrogradnog kaviteta, tehnici izrade retrogradnog kaviteta i o materijalu za retrogradno punjenje. Konvencionalna tehnika za izradu retrogradnog kaviteta koristi svrdlo, no teški pristup apikalnom dijelu korijena i stvaranje velike količine debrisa i zaostatnog sloja u kavitetu, čine ga podreĎenim u odnosu na ultrazvučnu tehniku koja se najčešće koristi u kliničkoj praksi. Ultrazvučni nastavci zahvaljujući posebnom dizajnu za retrogradne kavitete lakše pristupaju korijenu, precizinija je izrada preparacije i manji rizik od nastanka perforacija. Nedostatak ultrazvučne tehnike je zaostajanje debrisa i zaostatnog sloja, te nastanak mikrofraktura. Retrogradni kaviteti mogu se izraĎivati i erbij laserima. Dosadašnja istraţivanja o laserima u endodontskoj kirurgiji pokazala su zadovoljavajuće rezultate, posebice u radu s biokeramičkim materijalima, koji se kemijski veţu za dentin jer ne ostavljaju zaostatni sloj. TakoĎer, ne proizvodi vibracije ni mikrofrakture.
Najistraţivaniji i najčešće korišten materijal za retrogradno punjenje kaviteta je MTA (mineral trioksid agregat). Biokompatibilnost, bioinduktivnost, mogućnost rada u vlaţnoj sredini i dobro rubno zatvaranje, čine MTA vodećim materijalom u punjenju retrogradnih kaviteta. Ipak, visoka cijena, oteţano rukovanje materijalom, dugo vrijeme stvrdnjavanja i obojenje tkiva, razlog su dolasku na trţište novih generacija biokeramičkih materijala koji imaju jednaka biološka i fizikalna svojstva s brţim stvrdnjavanjem materijala i lakšom manipulacijom. Istraţivanja o kvaliteti brtvljenja biokeramičkih materijala pokazuju slične rezultate kao i s MTA-om.

Abstract (english)

The aim of this study is to present and compare the results of the present research of apical sealing ability of bioceramic materials in retrograde cavities prepared with bur, ultrasonic and Er:YAG laser.
The success of apicoectomy with retrograde filling depends on the shape of the retrograde cavity, the retrograde cavity preparation technique and the retrograde filling material. Conventional preparation techniques with bur have difficult access to the apical part of the root and produce smear layer and debris which make them inferior in regard to ultrasound technique most commonly used in clinical practice. Due to the special design, ultrasonic tips can provide easier access to the root, the preparation process is more accurate and there is a lower risk of perforations. The disadvantages of ultrasonic tehnique are production of smear layer on the dentinal walls and high incidence of dentinal cracks. Retrograde cavities can also be preparated with erbium lasers. Recent research on lasers in endodontic surgery have shown satisfactory results because of smear layer absence, especially when working with bioceramics materials, which chemically bond to the dentin. Also, they produce no vibrations and microcracks.
The most researched and commonly used root-end material is MTA (Mineral trioxide aggregate). MTA is material of choice for root-end fillings because of its biocompatibility, bioinductivity, possibility of working in presence of mouisture and it's superior marginal adaptation. However, high price, difficult manipulation with material, long setting time and dying of tissue are reasons why new generation of bioceramics materials with equal biological and phisycal properties but faster setting time and easier handling, came to the market. Present studies on of sealing ability of bioceramics material present similar results as MTA.

• Keywords: endodontska kirurgija; svrdlo; ultrazvuk; laser; biokermički materijali; MTA
• Keywords (english): endodontic surgery; bur; ultrasonic; laser; bioceramics materials; MTA
• Language: croatian
• URN:NBN: urn:nbn:hr:127:152836
• Study programme: Title: dental medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica dentalne medicine (doktor/doktorica dentalne medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-08-30 10:26:42