The lingual position of the mandibular second molar and narrow tongue space are associated with oral tongue squamous cell carcinoma (OTSCC) development in young mature patients. The present study aimed to assess the role of the mandibular second molar position and tongue space in young mature patients with OTSCC. The medical records of 21 patients with OTSCC aged <50 years, who had an intact ma...

AIM: This study aims to investigate effect of mandibular third molars on angulation second and canines.&#x0D; MATERIAL AND METHOD: A total 16 patients (10 female, 6 male) were included. All had two panoramic radiographs. available in the first radiograph. The radiograph was taken approximately 124.81 ± 21.63 weeks after one-sided molar extraction. angulations canines measured These evaluated ex...

Mandibular premolars often show aberrant anatomy varying from one to three canals. The incidence of occurrence of 3 canals has been recorded to be 0.46 - 0.5 %. We report a case of mandibular second premolar with 3 canals, which was initially diagnosed radiographically by shift cone technique and confirmed by clinical examination. The tooth was successfully obturated and restored. It remained a...

introduction an in vitro study was performed to determine the number and the type of root canals of mandibular incisor teeth in an iranian population. methods and materials sixty eight mandibular incisor teeth were immersed in india ink decalcified and cleared. results it was found that 55.9% of the teeth had two canals that in 51.5% of them the canals merged into one canal before exiting the t...

There are no quantitative data on the mechanical efficacy of irrigation in the removal of bacteria from curved canals. This study quantitatively analyzed the effects of root canal curvature and preparation size on the mechanical efficacy of irrigation using 33 mandibular single-rooted bicuspids allocated to groups according to root canal curvatures, group 1 (straight) 4 to 8 degrees, group 2 (i...

OBJECTIVES The purpose of this study was to evaluate the proximity of the mandibular molar apex to the buccal bone surface in order to provide anatomic information for apical surgery. MATERIALS AND METHODS Cone-beam computed tomography (CBCT) images of 127 mandibular first molars and 153 mandibular second molars were analyzed from 160 patients' records. The distance was measured from the bucc...

As right quoted by MT Barrett, “of all the phases of anatomic study in human system, one of the most complex is the pulp cavity morphology.” The external and internal morphology of the tooth varies from person to person. For each tooth in permanent dentition, there is a wide range of variation reported in literature with the respect to frequency of occurrence of the number and shape of the cana...

INTRODUCTION Congenital absence of mandibular second premolars affects many orthodontic patients. The orthodontist must make the proper decision at the appropriate time regarding management of the edentulous space. These spaces can be closed or left open. IMPLICATIONS If the space will be left open for an eventual restoration, the keys during orthodontic treatment are to create the correct am...

Intraosseous migration is an unusual developmental dental anomaly, which demonstrates horizontal movement of unerupted teeth only affecting the permanent dentition of the lower jaw. Mandibular second premolar is the most common impacted tooth after the third molars and maxillary canines. Distal migration of the second premolar is rare and early loss of the permanent first molar is one of the mo...