نتایج جستجو برای: root morphology
تعداد نتایج: 281438 فیلتر نتایج به سال:
Objectives: The aim of this literature review was to analyze the root canal shape of human teeth described in anatomical studies as recent wide use of fiber posts resulted in a new interest for the anatomy of coronal and middle portions of the canal, where post-space should be prepared, in order to achieve the best fiber post fitting to the post-space. Material and methods Original scientific p...
هدف از این تحقیق، بررسی و مدلسازی ارتباط جنگل زدایی و متغیرهای انسانی – فیزیوگرافی ر جنگل های فلارد است. جنگل زدایی براساس کاهش درصد تاج پوشش جنگل با استفاده از تفسیر چشمی عکس های هوایی سال های 1334، 1346، 1376 و تصویر ماهواره ای سال 1387 انجام شد. رابطه ساده میزان جنگل زدایی و متغیرهای مستقل (عوامل توپوگرافی، نزدیکترین فاصله به جاده، نزدیکترین فاصله به مناطق مسکونی ، تراکم جاده، جمعیت) با استف...
Plant roots are the first parts of plants to face drought stress (DS), and thus root modification is important for plants to adapt to drought. We hypothesized that the roots of arbuscular mycorrhizal (AM) plants exhibit better adaptation in terms of morphology and phytohormones under DS. Trifoliate orange seedlings inoculated with Diversispora versiformis were subjected to well-watered (WW) and...
OBJECTIVES The success of endodontic treatment is based on cleaning and shaping of the root canals. The root canals have complex morphology and wide individual variations. The objective of this study was to analyze root canals morphology and existence of extra canals in maxillary molars in Saudi subpopulation. METHODS Freshly extracted maxillary first molars (n=100) were included in this stud...
The present study was aimed to determine the topographic relationship between root apex of the mesially and horizontally impacted mandibular third molar and lingual plate of mandible. The original cone beam computed tomography (CBCT) data of 364 teeth from 223 patients were retrospectively collected and analyzed. The topographic relationship between root apex and lingual plate on cross-sectiona...
This case report describes endodontic therapy on a mandibular first molar with unusual root morphology. In the initial treatment the working length had been determined with only an apex locator; no periapical radiographs had been obtained because the patient was pregnant. The root canal into an additional distolingual root had not been found and was therefore left untreated, which led to treatm...
The several anatomical variations existing in the root canal system may contribute to failure of the root canal therapy. Knowledge of the internal dental morphology is a complex and extremely important point for planning and performing endodontic therapy. This paper reports the case of a left mandibular third molar that presented only one dental conical root and only one aberrant radicular cana...
Hoagland solution was used to determine the root morphology properties of Rorippa globosa (Turcz.) Thell. and Rorippa palustris (Leyss.) Bess. Under the conditions of Cd spiked at 2.5 and 5 mg kg(-1), R. globosa showed all hyperaccumulative characteristics and was a Cd-hyperaccumulator. In contrast, R. palustris was a non-hyperaccumulator. The total root lengths, total root surface areas and to...
Objective To evaluate the root and root canal morphology of the maxillary second molars (MSMs) in a native Chinese population by cone-beam computed tomography. Methods Cone-beam computed tomography images of 2412 MSMs from 1294 Chinese patients were analyzed to determine the number and morphology of the roots, the root canal morphology, the bilateral symmetry, and the correlations of these para...
INTRODUCTION The aim of this in vitro study was to identify the root and canal morphology of maxillary first and second molars in Iranian population by taking and analyzing cone-beam computed tomography (CBCT) scans. METHODS AND MATERIALS Extracted maxillary first (n=125) and second (n=125) molars were collected from native Iranians and scanned by using a CBCT scanner. The number of roots and...
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