Three-rooted lower first permanent molars in Hong Kong Chinese

Walker, Richard; Quackenbush, Larry E.

doi:10.1038/sj.bdj.4805710

Cited by 99 publications

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“…A thorough inspection of the radiograph to look for unclear outlines of the distal root contour or root canal can also reveal the presence of hidden radix entomolaris. 36,37 There was a higher number of practitioners who were able to detect extra root presence in lower premolar radiographs than in lower molar radiographs ( Figure 2) and this may be owing to the fact that in lower premolars the extra root was in the mesial aspect and was easier to detect, whereas in lower molar radiographs the extra root was present in the lingual aspect and so its presence was more difficult to read because of the superimposing image of the main roots. 34 Yoshioka et al (2004) 38 showed that, 96% of the time, extra root canals in mandibular pre-molar radiographs were correctly detected by dentist using sudden narowing of the main canal to judge the root canal multiplicity.…”

Section: Discussionmentioning

confidence: 97%

Pre-operative diagnostic radiograph interpretation by general dental practitioners for root canal treatment

Sherwood¹

2012

Dentomaxillofacial Radiology

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Objectives: The aim of this study was to evaluate which radicular radiographic features general dentists want to interpret, determine which of the radicular radiographic features general dentists interpret and which ones they miss in a diagnostic radiograph and correlate how accurately general dentists are able to interpret radiographic features. Methods: 20 general dental practitioners were selected and given 2 sets of questionnaires. The first set asked them to fill out the findings they would elucidate in a diagnostic radiograph while the second set consisted of 30 randomly selected intraoral radiographs to interpret. Results: In the first set of questionnaires, more than 50% of dentists said they would interpret periapical changes, calcification, root curvature and the number of root canals. Less than 50% said they would interpret canal morphology, open apex, resorption, fracture, number of roots and lamina dura. In the second set of questionnaires, more than 90% missed grade 1 or 2 periapical changes (according to periapical index scoring), resorption and canal calcification. More than 80% of dentists missed extra roots and root curvature buccally while no dentists were able to interpret the periodontal ligament width changes, lamina dura and canal variation (C-shape). Using a paired t-test, there was significant variation in answers between the first set and second set of questionnaires. Conclusion: It is concluded from this study that general dental practitioners are able to detect radiographic changes when they are extensive but they miss periodontal ligament width and lamina dura changes.

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Section: Discussionmentioning

confidence: 97%

Pre-operative diagnostic radiograph interpretation by general dental practitioners for root canal treatment

Sherwood¹

2012

Dentomaxillofacial Radiology

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“…The geographic position of Saudi Arabia in particular, and the Middle East in general, may provide an explaUnauthenticated Download Date | 5/12/18 7:05 AM Walker, 1985Walker, , 1988aAl-Nazhan, 1999 Mandibular second molar C-shaped canal occurs in 14-52% of cases, but in 70% of cases occur in the contralateral teeth Gulabivala et al 2002;Walker, 1988b;Manning, 1990;Jafarzadeh and Wu, 2007;Kirilova and Topalova-Pirinska, 2014;Gao et al 2006 Unauthenticated Download Date | 5/12/18 7:05 AM nation of this phenomenon (Al-Fouzan 2002). The other explanation is given by a mitochondrial DNA analysis of Saudi Arabian group that reveals contributions from Africa and the Near East almost solely (Abu-Amero et al 2007).…”

Section: Ethnic and Geographic Variations On Root Canal Morphologymentioning

confidence: 99%

Differentiation of root canal morphology – a review of the literature

Przesmycka

Tomczyk

2016

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The morphological diversity of the inner anatomy of root canals in human permanent teeth is an issue mainly described in endodontics research. In recent years, it is a relatively new point in anthropological studies because it varies by sex, geographic and ethnic circumstances. An unusual number of root canals or their specific systems can differentiate populations around the world. The multiplicity of available methods for detecting root canal systems helps to better understand their complexity; however, most cannot be applied to anthropology due to limitations that occur in the bioarcheological material. Thorough knowledge of the heterogeneity and internal anatomy of the root canals supplies numerous classification systems proposed and improved over the years by many authors. A limited number of studies in the anthropological literature and future research will shed light onto the internal tooth morphology in historical populations. The aim of this paper is to describe various classification systems of root canals applied in endodontics. However, due to the often poor state of preservation and damage of archaeological derived remains, it seems that the best method is the approach that is the simplest and least complicated.

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“…A maximum frequency of 3% is found in African populations, while the frequency is less than 5% in Eurasian and Indian populations [4,5]. RE occurs with a frequency ranging from 5% to more than 30% in Mongoloid population [6][7][8]. The prevalence of C-shaped canals in Koreans has been reported to be as high as 32.7% and this variation is most frequently found in the mandibular second molar [9].…”

Section: Introductionmentioning

confidence: 99%

“…The prevalence of C-shaped canals in Koreans has been reported to be as high as 32.7% and this variation is most frequently found in the mandibular second molar [9]. Although studies have reported RE or C-shaped root canals in mandibular molars, few studies have investigated the Cshaped root canal in mandibular first molar with RE [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Endodontic treatment of tooth with morphological anomalies using cone-beam computed tomography

et al. 2018

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·············································································································································································The aim of this study is to describe the endodontic treatment of a radix entomolaris (RE) with the C-shaped canal in mandibular first molar and a fused maxillary premolar with two supernumerary teeth with the separated root canal using cone-beam computed tomography imaging (CBCT). In our cases, non-surgical endodontic treatment based on the results of CBCT diagnosis, ProTaper rotary system, hand instrumentation, and passive ultrasonic irrigation along with periodontal treatment resulted in long-term and successful prognosis. Therefore, CBCT analysis an effective diagnostic tool for the treatment of teeth containing complex root canals.

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Three-rooted lower first permanent molars in Hong Kong Chinese

Cited by 99 publications

References 0 publications

Pre-operative diagnostic radiograph interpretation by general dental practitioners for root canal treatment

Pre-operative diagnostic radiograph interpretation by general dental practitioners for root canal treatment

Differentiation of root canal morphology – a review of the literature

Endodontic treatment of tooth with morphological anomalies using cone-beam computed tomography

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