case presentation a 30-year-old male patient with a history of severe, throbbing, constant pain in the lower mandibular molars was referred to the department of endodontics of hamedan dental university. the patient’s medical history was noncontributory. the buccal object rule (same-lingual opposite-buccal technique) confirmed the additional root as a distolingual root (radix entomolaris). follo...

An investigation of pit and fissure sealant retention in 1,871 children in the Head Start program was conducted in Tennessee in September 1985 to determine the retention of the sealant after application to the occlusal surfaces of primary molars of 3- and 4-year-old children. The investigation shows pit and fissure sealants are retained on primary molars at a rate comparable to that expected on...

Primary and permanent molars are usually multi rooted. At times we can encounter cases with a single root, called pyramidal root. Oligodontia is defined as the developmental absence of six teeth or more, excluding third molars. It can be isolated (Oligodontia-I) or as a part of a syndrome (Oligodontia-S) such as in ectodermal dysplasia. The present report describes a case of single-rooted prima...

The role of third molars in causing late mandibular incisor crowd ing is controversial. Various studies have been conducted to eva luate their relationshi p. The purpose of this article is to (a) rev iew the studies regarding the mandibular third molars and late mandibular arch crowd ing (b) fi nd out the cause and effect re lat ionship between them (c) eva luate the just ificat ion of prophyla...

BACKGROUND AND AIMS An accurate color reproduction represents the final validation level of an esthetic anterior or posterior restoration. The aim of this study was to evaluate the color of permanent maxillary incisors, canines and molars, using a clinical spectrophotometer. METHODS The Vita Easyshade Advance 4.0(®) intraoral spectrophotometer was used by one clinician to determine the color ...

AIM To investigate differences in the root canal morphology of permanent mandibular molar teeth at various ages. METHODOLOGY Four hundred and eighty permanent mandibular first and second molars were examined. First and second molars were divided into six and five groups, respectively, according to the age of the patient at the time of extraction. Root canal morphology was studied using a clea...

INTRODUCTION "Kissing" or "rosetting" of molars refers to contacting occlusal surfaces of impacted permanent mandibular second, third, and, very rarely, fourth molars. It is a rare phenomenon. AIM The aim of this study was to assess the incidence, dental involvement type, associated pathologies and treatment outcomes of kissing molars in all patients who underwent lower third molar surgery be...

BackgroundOpen bite is considered one of the most complicated malocclusions in orthodontic treatment. In this study, authors successfully treated total open involved hypercementosis using miniscrews.Case DescriptionA woman aged 25 years 8 months had bite. Her occlusal contact at maximum intercuspation was present right second molars. A panoramic radiograph showed diffuse hypercementosis. The ti...

Helicoid occlusion has long been recognized as a feature characterizing the human dentition and has been viewed as an important morphological marker in the transition from Australopithecus to Homo. The hallmark of helicoidal wear is a buccal wear slope in anterior mandibular molars (and a corresponding lingual slope of wear in anterior maxillary molars) reversing to a flat or lingual-oriented o...