Sealing ability of lateral compaction and tapered single cone gutta-percha techniques in root canals prepared with stainless steel and rotary nickel titanium instruments

Objectives: The aim of this study was to evaluate the sealing ability of lateral compaction and tapered single cone gutta-percha techniques in root canals prepared with stainless steel and rotary nickel titanium root canal instruments by fluid filtration method. Study design: The root canals were prepared with stainless steel (SS) and nickel titanium (NiTi) instruments. The canals prepared with SS were obturated with lateral compaction technique using .02 tapered cones and the canals prepared with NiTi instruments were obturated with lateral compaction technique using .02 tapered cones or 06 tapered single cones. The amount of leakage was evaluated by fluid filtration model. The results were statistically analyzed with one-way ANOVA. Results: The group prepared with NiTi instruments and filled with lateral compaction technique showed significantly less coronal leakage than the group prepared with SS instruments and filled with lateral compaction technique (p0.05). Conclusions: Obturation with lateral compaction of gutta-percha provides a superior coronal seal whilst canal instrumentation with engine-driven NiTi files reduces the extent of microleakage in root canals when compared with stainless steel hand instruments. Tapered single cone technique was comparable with lateral compaction technique because of easier application

Clinical and radiographical evaluation of non-syndromic hypodontia and hyperdontia in permanent dentition

Objectives: The purpose of this study was to evaluate the clinical and radiographical characteristics of non-syndromic hypodontia and hyperdontia in the permanent dentition.Study design: This study included 139 patients. Clinical and radiographical examinations were carried out by two examiners. Number and localization of missing or supernumerary teeth, and pathologies associated with the teeth, were recorded. Other teeth in the mouth were also examined for the presence of additional dental anomalies.Results: A total of 256 congenitally missing teeth were observed in 102 patients, and 73 supernumerary teeth were observed in 37 patients. The rate of missing teeth was much higher in females (67.6 %) than males (32.4 %) and in the maxilla (64.5 %) than mandible (35.5 %). The rate of supernumerary teeth was slightly higher in males (59.5 %) than females (40.5 %) and in maxilla (53.4 %) than mandible (46.6 %). The most common hypodontia type was mild to moderate hypodontia (62.7 %) and the most observed hyperdontia was a single supernumerary tooth (54.1 %). Microdontia, talon cusp, taurodontic molars were observed in 18.6 % of patients with hypodontia; and microdontia and dilacerated molars were observed in 8.1 % of patients with hyperdontia.Conclusions: Although missing and supernumerary teeth are asymptomatic in most cases, they may lead to malocclusions, aesthetic, functional and psychological problems

EDTA ve Eti̇droni̇k Asi̇t Varliğinda NeoMTA Plus’in Denti̇n Tübül Penetrasyonunun Değerlendi̇ri̇lmesi

Amaç:&nbsp;Bu çalışmanın amacı EDTA ve etidronik asit solüsyonları uygulanan kök kanallarında NeoMTA Plus® ve AH Plus® kök kanal patlarının dentin tübül penetrasyonunu konfokal lazer taramalı mikroskop ile incelenmesidir.Gereç ve Yöntem:&nbsp;Çalışmada 102 adet tek köklü, kök gelişimini tamamlamış, insan alt çene premolar dişleri kullanıldı. Kemomekanik preparasyon, 10 ml %2 NaOCl irrigasyonu kullanılarak Ni-Ti döner eğe sistemleri ile yapıldı. Dişler kullanılacak şelasyon ajanları ve kök kanal patlarına göre, her biri 17 örnekten oluşan altı deney grubuna ayrıldı: Grup 1: HEBP- AH Plus®, Grup 2: HEBP-NeoMTA Plus®, Grup 3: EDTA-AH Plus®, Grup 4: EDTA-NeoMTA Plus®, Grup 5: Salin-AH Plus®, Grup 6: Salin-NeoMTA Plus®. Final irrigasyonunun ardından kök kanalları Rhodamin B ile muamele edilmiş NeoMTA Plus® ve AH Plus® kök kanal patları ile tek kon tekniği kullanılarak dolduruldu. Obturasyon işlemlerinden sonra apeksten 1 ve 5 mm mesafeden horizontal yönde kesitler alınıp konfokal lazer taramalı mikroskop ile incelendi. Maksimum tübül penetrasyonu ve penetrasyon yüzdesi değerleri Konfokal lazer mikroskopi (CLSM) görüntülerinden elde edildi. İkili karşılaştırmalarda Bonferroni düzeltmesi ile iki yönlü varyans analizi (ANOVA) kullanılarak istatistiksel olarak analiz edildi (p&lt; 0.05).Bulgular:&nbsp;1 mm’deki penetrasyon derinliği analizinde Grup 1 ve Grup 5 arasında istatistiksel olarak anlamlı fark vardır (p=0.017). 5 mm’de Grup 5, Grup 1 ve Grup 3’e göre daha düşük penetrasyon derinliği göstermiştir (p=0.005). 1 mm’de Grup 5, Grup 6 ve Grup 3’ten daha düşük penetrasyon yüzdesi göstermiştir (p=0.030).Sonuç:&nbsp;Smear tabakasının kaldırılması kök kanal patlarının dentin tübül penetrasyonunu artırmıştır. NeoMTA Plus® kök kanal patı AH Plus®’tan daha yüksek tübül penetrasyon değerleri göstermiştir ve smear tabakasının kaldırılması dentin tübül penetrasyonunu artırmıştır.Anahtar kelimeler:&nbsp;CLSM; dentin tübül penetrasyonu; EDTA; etidronik asit; NeoMTA PlusAim:&nbsp;The aim of this study was to evaluate the dentinal tubule penetration of NeoMTA Plus and AH Plus root canal sealers in root canals applied with etidronic acid (HEBP) and Ethylene diamine tetra acetic acid (EDTA) by using Confocal Laser Scanning Microscopy (CLSM).Material and Methods:&nbsp;The study was performed on 102 extracted human mandibular premolar teeth with single canals. Chemomechanical preparation was done using Ni-Ti rotary files with 2% NaOCl irrigation. The teeth in the study group were evaluated in terms of chelation agents and root canal sealers in six experimental groups: Group 1:HEBP-AH Plus, Group 2:HEBP-NeoMTA Plus, Group 3:EDTA-AH Plus, Group 4:EDTA- NeoMTA Plus, Group 5:Saline-AH Plus, Group 6:Saline-NeoMTA Plus. After the final irrigation, the root canals were obturated with NeoMTA Plus and AH Plus which were mixed with 0.1% Rhodamin B dye. Teeth were sectioned at 1 mm and 5 mm from the apex. The maximum tubule penetration and percentage of penetration values were obtained from the CLSM images and were statistically analyzed using a two-way analysis of variance (ANOVA) with Bonferroni correction (p&lt; 0.05).Results:&nbsp;In the penetration depth analysis at 1 mm, there was a statistically significant difference between Group 1 and Group 5 (p = 0.017). In 5 mm, Group 5 showed a lower penetration depth than Group 1 and Group 3 (p = 0.005). In 1 mm, Group 5 showed a lower penetration percentage than Group 6 and Group 3 (p=0.030).Conclusions:&nbsp;The NeoMTA Plus showed better tubule penetration results than the AH Plus and removal of the smear layer increased dentin tubule penetration.Keywords:&nbsp;CLSM; dentinal tubule penetration; EDTA; etidronic acid; NeoMTA Plus</div