background: low- level laser therapy has been used to stimulate the orthodontic tooth movements (otm) previously. furthermore, in the orthodontic treatments accompanying tooth extractions, the adjacent teeth move towards the extraction sites and close the space in some cases. then, the adjacent tooth movements must be prevented in the treatments requiring space. laser stimulates and at some dos...

INTRODUCTION The aim of this study was to determine the mesiodistal and buccolingual diameter, apical volume, and the presence of isthmuses at the apical level of mesial root canals of mandibular molars. METHODS Sixty extracted first and second mandibular molars were scanned by using a SkyScan 1076 micro-computed tomography system with a voxel size of 18 μm. The apical thirds of the samples w...

BACKGROUND The objective of the study was to evaluate and compare how apical enlargement with K3 and K3XF nickel-titanium (NiTi) rotary instruments reduces the root thickness in the danger zone and affects canal transportation and centering ability in mandibular molar mesial canals in a manikin extracted tooth model. MATERIAL AND METHODS Seventy-two mesial root canals of first mandibular mola...

BACKGROUND The purpose was to determine whether or not a novel device used in conjunction with orthodontic treatment produced root resorption shown on 3D images generated from a new cone beam computerized tomography. METHODS Subjects were actively recruited and those who received braces for the first time were invited to participate. Patients were assigned to receive a functioning device and ...

The efficacy of five instrumentation techniques for cleaning the apical third of curved root canals was assessed by histological examination. Mesial root canals of freshly extracted human mandibular molars were prepared by the following instrumentation methods: step-back technique using stainless steel files; step-back technique using nickel-titanium files; ultrasonic technique; balanced force ...

BACKGROUND Iatrogenic complications such as accidental perforation of the root or the floor of the pulp chamber may occur. CASE REPORT Patient was referred for root canal retreatment of the mandibular left second molar with periapical lesion evidenced through radiographic examination. During post removal, iatrogenic perforation occurred at the mesial face of the distal root. After clinical lo...

The aim of this study was to analyze the relationship among the point of greatest depression on the root trifurcation floor and the furcation openings of the maxillary second molars. Sixty human extracted upper permanent second molars were analyzed and the furcation area were measured using a vertical calliper, and the values regarding the point of deepest depression were recorded. The results ...

this report describes the non-surgical treatment of an invaginated maxillary lateral incisor with two fused roots. the mesial root had a c-shaped canal, while the distal one had a type iii dens invagination. cone-beam computed tomography (cbct) was used to help with the diagnosis and treatment decision making. clinical and radiographic follow-up revealed satisfactory periapical repair and absen...

Generally, mandibular first molars have one mesial and distal root but in few cases there are morphological variations where the number of roots canals may vary. Radix Entomolaris (RE) is presence of an additional lingual distally molars. Correct diagnosis important before starting with endodontic therapy these teeth to ensure successful treatment outcome. This case report series describes the ...