Linear Variation of the Root Surface Area of the Maxillary First Molar

Gher, Marlin W.; Dunlap, Robert W.

doi:10.1902/jop.1985.56.1.39

Cited by 48 publications

(36 citation statements)

References 13 publications

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“…At the cementoenamel junction, the average depth of the groove was 0.18 mm and the average width, 2.29 mm. Thus, in our sample, an area of trunk without groove did not exist in the majority of the analyzed teeth, differently from what was observed by the authors mentioned above 9 . The collected data enabled us to note that, starting from the cementoenamel junction and heading to the furcation, there was a progressive increase in the width and depth of the root trunk groove, which reached their maximum values in the last millimeter of the root trunk.…”

Section: Discussioncontrasting

confidence: 95%

“…GHER; DUNLAP 9 reported that the beginning of the concavities was found at a distance of 0.7 mm from the cementoenamel junction on the buccal surface, and at a distance of 0.3 mm from that junction, on the lingual surface. The concavities progressively deepened until they reached the furcation.…”

Section: Discussionmentioning

confidence: 98%

“…The concavities progressively deepened until they reached the furcation. However, no evaluation has been carried out on their depth and apical extension 9 . We noted that the beginning of the root trunk groove occurred on the cementoenamel junction in 77.5% to 90.2% of the examined teeth.…”

Section: Discussionmentioning

confidence: 99%

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Biometric study of the width, length and depth of the root trunk groove of human lower second molars

Rios

Pustiglioni

Romito

2002

Pesqui. Odontol. Bras.

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. E.; ROMITO, G. A. Biometric study of the width, length and depth of the root trunk groove of human lower second molars. Pesqui Odontol Bras, v. 16, n. 1, p. 26-30, jan./mar. 2002. One hundred human lower second molars, 51 from the left side and 49 from the right side, extracted due to their poor clinical and radiographic conditions were utilized in this study. Using a Contracer apparatus, the profiles of the buccal and lingual root surfaces of these teeth were traced on a millimeter-scaled paper. The profiles were registered from the cementoenamel junction (CEJ), millimeter by millimeter, up to the entrance of the furcation. The width, length and depth of the root trunk groove, as well as the length of the root trunk, were studied. After statistical analysis (p < 0.05) it was possible to conclude that: a) the mean width of the root trunk groove on the buccal surface was 3.6 mm and, on the lingual surface, 3.3 mm; b) the mean depth of the root trunk groove on the buccal surface was 0.88 mm and, on the lingual surface, 0.77 mm; c) the mean length of the root trunk groove on the buccal surface was 2.93 mm and, on the lingual surface, 3.61 mm. The mean length of the root trunk on the buccal surface was 3.09 mm and, on the lingual surface, 3.91 mm (p < 0.025). There was a coincidence between the length of the root trunk and that of its groove in 90.2% of the buccal surfaces of the samples from the left side, and in 77.5% of the samples from the right side; on the lingual surface, the coincidence occurred in 77.5% of the teeth from the left side, and on 88.3% of the teeth from the right side. This work revealed that there is a concavity on the root trunk region of the lower second molar, whose depth and width were greater on the buccal surface and whose length was greater on the lingual surface. The depth of the root trunk groove increased in the apical direction, with maximum depth in the last millimeter of the root trunk. The root trunk was longer on the lingual surface than it was on the buccal surface.

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Section: Discussioncontrasting

confidence: 95%

Section: Discussionmentioning

confidence: 98%

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Biometric study of the width, length and depth of the root trunk groove of human lower second molars

Rios

Pustiglioni

Romito

2002

Pesqui. Odontol. Bras.

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“…It has been observed that shorter root trunks impacts the pathogenesis and makes the tooth more vulnerable to furcation involvement 15) . The observations of this study revealed that, the actual mean length of buccal root trunk of maxillary fi rst molars was 3.23mm which was lower than the values observed by Porciúncula et al, 16) Dababneh et al, 13) Gher and Dunlop 17) , who observed that this length was 3.50mm, 3.97mm and 4.2mm respectively. In the mandibular first molar, the actual mean length of buccal root trunk was 3.45mm and in contrast to this a lower value were observed by Gher and Verino, 18) and Mandelaris et al, 19) who noted that the mean root trunk length was 3mm and 3.19mm on the buccal aspect.…”

Section: Discussioncontrasting

confidence: 71%

Analysis of the Length and Types of Root Trunk and Length of Root in Human First and Second Molars and to the Actual Measurements with the 3D CBCT

Al-Zoubi

Patil

Takeuchi

et al. 2018

J. Hard Tissue Biology.

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To assess the length and types of root trunk and length of root in a Saudi Population and to correlate the actual measurements with the CBCT measurements. A total of 206 molars were used in this study. CBCT were obtained and subsequently patients were subjected for extraction as the tooth were having poor prognosis. The measurements were carried out on CBCT by using the accompanying software and the actual measurements were carried out with a digital vernier caliper. The mean and SD scores were calculated for actual length of root trunk and length of root and from CBCT method in maxillary and mandibular 1st and 2nd molar in Type of root trunk. Then the actual and CBCT length of root trunk and length of root were compared dependent t test. The statistical signifi cance was set at 5% level of signifi cance (p<0.05). In maxillary arch, the type A root trunk was observed in 55.88% and 39.06%, type B in 44.11% and 59.37% of fi rst and second molars respectively. Type A root trunk was observed in 75.0 % and 55.18%, type B in 25.0% and 44.87% of mandibular fi rst and second molars respectively. The diff erence between the actual length and CBCT length of root trunk was statistically non-signifi cant (p>0.05) and no signifi cant diff erence is observed between actual length of root and length of root measured by CBCT (p>0.05). Knowledge of the types of root trunk type dimension may aid the dental practitioner in diagnosing and planning the treatment of molars with furcation involvement. CBCT may lend comparatively discriminative dimensions of the periodontal defect similar to that of actual measurements.

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“…Briefly, the teeth were placed in 3% sodium hypochlorite to remove all soft tissue, and accretions were then carefully removed with an ultrasonic scaler (Hermann et al, 1983;Dunlap and Gher, 1985;Gher and Dunlap, 1985;Lyroudia et al, 2000).…”

Section: Methodsmentioning

confidence: 99%

Quantitative evaluation of the accuracy of micro‐computed tomography in tooth measurement

2005

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Micro-computed tomography (MCT) is a noninvasive technique for visualizing morphological characteristics of teeth in a detailed and accurate manner, without causing any tooth destruction. A large amount of information can be obtained from such scans. The slices can be recreated in any plane, and the data can be represented as either two-dimensional (2D) or three-dimensional (3D) images. In addition, the internal and external anatomy can be demonstrated simultaneously or separately, and the images can be assessed qualitatively and quantitatively. However, only the qualitative accuracy of MCT had been evaluated previously. The aim of the present study was to evaluate the accuracy of MCT quantitatively by comparing the values obtained by MCT with those of other imaging methods. Twelve teeth were scanned using a desktop X-ray micro-CT scanner, and the images were reconstructed and measured. Values obtained by direct measurement served as the primary reference for linear measurements. Measurements made by a 3D scanner and by photography were additional references. MCT was found to be a reliable method of making linear measurements and may be a useful device for measuring distance and for observing both internal and external tooth structure using the reconstructed 3D form.

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Linear Variation of the Root Surface Area of the Maxillary First Molar

Cited by 48 publications

References 13 publications

Biometric study of the width, length and depth of the root trunk groove of human lower second molars

Biometric study of the width, length and depth of the root trunk groove of human lower second molars

Analysis of the Length and Types of Root Trunk and Length of Root in Human First and Second Molars and to the Actual Measurements with the 3D CBCT

Quantitative evaluation of the accuracy of micro‐computed tomography in tooth measurement

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