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Dentin-Pulp Complex Regeneration
Published in Vincenzo Guarino, Marco Antonio Alvarez-Pérez, Current Advances in Oral and Craniofacial Tissue Engineering, 2020
Amaury Pozos-Guillén, Héctor Flores
Publications related to regenerative endodontics have increased significantly in the last decade. In an electronic search in PubMed, with appropriate MeSh terms including ‘regenerative endodontics’, 259 studies of potential relevance were identified (18 April 2019). The first case reports of ‘revascularization’ were reported in 2001 and 2004. Successful clinical outcomes in teeth with pulp necrosis were reported without the conventional obturation of the root canal with gutta-percha or bioceramic materials. These studies defined the direction of the investigation in this topic. From these statistics, it becomes immediately clear that these two conditions remain a significant public health problem and require better strategies for disease prevention and clinical management (Iwaya et al. 2001; Banchs and Trope 2004).
The Dental Connection to Health
Published in Aruna Bakhru, Nutrition and Integrative Medicine, 2018
Alyse Shockey, Lisa Marie Samaha, Dawn Ewing
When the nerve and pulp of the tooth are removed by this procedure, they are replaced with an inert substance—usually the rubber-like “gutta percha.” The dentist attempts to sterilize the tooth before the gutta percha is inserted in the “root canal.” The object is to cut off the normal circulation of bacteria through the tooth and make it permanently sterile.
Applicators
Published in William Y. Song, Kari Tanderup, Bradley R. Pieters, Emerging Technologies in Brachytherapy, 2017
Primoz Petric, Christian Kirisits, Jose Perez-Calatayud, Umesh Mahantshetty, William Y. Song, Bradley R. Pieters
Standard applicators are not ideal for treatment of irregular cavities because the cavity or lumen wall will not be covered adequately. Thermoplastic mold materials can be utilized for these situations. These materials are extensively used for head-and-neck and orbital rhabdomyosarcoma in the so-called Ablative surgery, Mold brachytherapy, REconstruction (AMORE) therapy (Blank et al. 2010). With this technique, similar survival to the standard treatment with external beam irradiation has been reported with less late effects as advantage (Schoot et al. 2015). The characteristic of a thermoplastic material consisting of 5 mm thick sheets is that it will become soft in warm water at 80°C. The material can be cut in desired shape and molded according to the cavity contour. At body temperature, the product will turn hard. Usually, several prepared sheets are placed covering all the walls of a cavity. Catheters are placed in the sheets by making a groove with a soldering iron. Because of the stickiness of the grooves, the catheters can be fixed in the mold. Because of the cavity irregularity the mold will stay in place when filled and pressed against the cavity wall. Traditionally, natural rubber (gutta-percha), was used for thermoplastic molds. This product has been replaced by a synthetic polymer Fastform-Percha® (FastForm Research Ltd.) (Figure 3.5).
Antibacterial activity and physicochemical properties of a sealer containing copaiba oil
Published in Biofouling, 2023
Lara Rodrigues Schneider, Andressa da Silva Barboza, Juliana Silva Ribeiro de Andrade, Daniela Coelho dos Santos, Carlos Enrique Cuevas-Suárez, Evandro Piva, Angela Diniz Campos, Rafael Guerra Lund
Endodontic sealers must also have sufficient radiopacity to allow an easy distinction between the dental materials and the surrounding anatomical structures. Radiopacity is also important for assessing the quality of root fillings, through radiographic examinations (Carvalho-Junior et al. 2007). According to the ISO 6876 (2016) and the ANSI/ADA (2000), the minimum radiopacity of endodontic sealers must be equivalent to 3 mm of aluminum to ensure that the root materials will not produce artifacts in the computed tomography (Celikten et al. 2019). In this study, the radiopacity of the experimental materials reached the minimum recommended by regulations, corresponding to above 3 mm Al in all sealers (Table 2). The RealSeal and AH Plus commercial sealers presented the highest radiopacity value (7 mm Al). It is important to point out that together with gutta-percha, very opaque sealers can mask imperfections in the filling. The radiopacity in resin-based sealers can be modified by incorporating radiopaque minerals (Gambarini et al. 2006). Therefore, minimal adjustments to our experimental material can be recommended.
The influence of voxel size and artifact reduction on the detection of vertical root fracture in endodontically treated teeth
Published in Acta Odontologica Scandinavica, 2021
Serdar Uysal, Gokcen Akcicek, Eda Didem Yalcin, Behram Tuncel, Sema Dural
Until the CBCT scan, all the teeth were stored in distilled water. One hundred single-rooted extracted human teeth were inspected for the absence of root fracture with a 3.5X loupe. The crowns sectioned below the cement enamel junction so that the length of all roots was adjusted to approximately 16 mm. After a working length of 15 mm was calculated, the canals were prepared with Protaper (Dentsply Maillefer, Ballaigues, Switzerland) till F3 file size. Throughout the canal preparation using all the files, canal irrigation was done with 1 ml 2.5% Sodium Hypochlorite solution (NaOCl). After root canal preparation, the canals were dried with paper points (Dentplus, Almere, Netherlands) and filled with F3 Protaper (Dentsply, Maillefer, Ballaigues and Switzerland) and AH plus by single cone technique. After gutta-percha cones were cut, specimens were prepared for tests in autoclave at 37 °C.
Temperature and time variations during apical resection
Published in Acta Odontologica Scandinavica, 2021
Ömer Ekici, Kubilay Aslantaş, Özgür Kanık, Ali Keles
The intraoral temperature is likely to change during the apical resection procedure, but it has been shown that the correct use of resection methods does not cause long-term temperature changes, does not increase above 47 °C and does not cause any irreversible thermal damage [6]. In our study, the highest temperature increase by piezo surgery was 11.15 °C and the mean time of apical resection was 55 s. Therefore, these results are slightly below the threshold indicated by Eriksson and Albrektsson [6] (irreversible resorption may occur in the alveolar bone tissue if the bone temperature increases by 13 °C for 1 min or 10 °C for 5 min). In methods other than piezo surgery, all temperature increases were below the 10 °C safety level. In vitro studies are not entirely like the in vivo environment. Clinically, root canals are filled by gutta percha and root canal sealers before root-end resection. Depends on their composition, root canal filling materials can act as an insulator or conductor [19]. Also, the in vivo environment is the less susceptible to thermal changes than the in vitro environment due to liquids, such as blood. Therefore, in the in vivo environment, heat dissipates more slowly than in vitro due to the isolation of blood in neighbouring tissues [20].