Root Morphology—Clinical Significance in Pathogenesis and Treatment of Periodontal Disease

Gher, Marlin E.; Vernino, Arthur R.

doi:10.14219/jada.archive.1980.0372

Cited by 106 publications

(61 citation statements)

References 14 publications

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“…Some studies simply mention yed methodology is efficient due to its precision, speed and facility of execution; therefore, we considered it advantageous in relation to the cross-section technique previously used in other studies 7,10,11 . Although there is no special methodology for the study of root trunk grooves, GHER; VERNINO 11 (1981) and SVARDSTROM; WENNSTRON 18 (1988) described a concavity which deepened in the direction of the furcation, starting the measurement at the cementoenamel junction.…”

Section: Discussionmentioning

confidence: 99%

“…Likewise, epidemiological studies carried out with dry mandibules 20,22 did not 28 5,6 , are more prone to extraction 4 , and show worse prognosis 13,16 . The need for special care to avoid the progression of periodontal disease in molars becomes obvious once we know that there are important predisposing anatomical factors, such as radicular concavities 6,10,11 . Considering that the root trunk is responsible for a large percentage of the total area of insertion of molars, and taking into account the previously described features of its groove, with regard to the difficulties of treatment and the presence of plaque-retaining recesses, our efforts should be concentrated on the radicular trunk region.…”

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: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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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“…Few studies have mentioned the presence of the furcation grooves in the palatal aspects of the buccal roots of the MFPs (2)(3)(4)(5). The prevalence of this phenomenon was reported to be very high, ranging from 62% to 100% (6)(7)(8). A lack of knowledge about the extent and thickness of the dentin in this area might lead to excessive thinning or perforation of the dentinal wall during either endodontic or restorative procedures, increasing the possibility of vertical root fractures (9)(10)(11).…”

Section: Introductionmentioning

confidence: 99%

Microcomputed tomographic analysis of the furcation grooves of maxillary first premolars

Al-Shahrani¹

2013

ADS

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SummaryObjectives. The aims of this study were to conduct a morphometric analysis on the buccal furcation grooves in freshly extracted bifurcated maxillary first premolars (MFPs) and to correlate all anatomical measurements using microcomputed tomography. Materials and Methods. Twenty-three human MFPs with bifurcated canals were selected for this study. The specimens were analyzed with microcomputed tomography. The length, the beginning, and the ending of the grooves were measured. The minimum cross-sectional canal wall thickness in the grooves was located, and the width of the dentin thickness was calculated. All measurements were recorded and statistically analyzed. Results. The concavity of the grooves begins before the bifurcation site in 9/23 samples and after the bifurcation in 56.5% of samples. The groove length varied between 1.1-9 mm; the cross-sectional area with minimum palatal dentin thickness was 0.78±0.14 mm, which was located at a mean distance of 7.1 mm from the cementoenamel junction (CEJ) and 1.38 mm from the furcation. Conclusions. The presence of the furcation grooves in the palatal aspects of the buccal roots of the MFPs was 100%. The length, depth, location, and width of the dentin thickness of the grooves varied in relation to tooth length, bifurcation, and CEJ. These parameters should be taken into consideration before any endodontic or restorative procedures are performed. Reducing dentin width too vigorously by intracanal instrumentation can predispose to vertical root fractures or perforations; if a post cannot be avoided, it should not extend 6.5 mm from the CEJ.

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“…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. The length of buccal root trunk of the mandibular second molar in this study was also more when compared with that of Mandelaris et al, 19) and Rois et al 20) .…”

Section: Discussionmentioning

confidence: 73%

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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Root Morphology—Clinical Significance in Pathogenesis and Treatment of Periodontal Disease

Cited by 106 publications

References 14 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

Microcomputed tomographic analysis of the furcation grooves of maxillary first premolars

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

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