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Fulltext A Comparative Evaluation of Five Obturation Techniques in the Management of Simulated Internal Resorptive Cavities: An Ex Vivo Study

Elenjikal MJ, Latheef AA, Kader MAM, Ganapathy S, Mohamed AB, Sainudeen SS, et al.

J Pharm Bioallied Sci, 2019 May;11(Suppl 2):S450-S456.
PMID: 31198386 DOI: 10.4103/JPBS.JPBS_75_19

Background: Root resorption is the loss of dental hard tissues as a result of clastic activities. It might be broadly classified into external or internal resorption by the location of the resorption in relation to the root surface. the various techniques used these days for filling internal resorption include warm condensation, vertical condensation, core techniques, thermoplasticized gutta-percha, warm vertical compaction, and cold lateral condensation.
Objectives: The aims and objectives of this study were to compare the quality of root fillings in artificially created internal resorption cavities filled with warm vertical compaction, lateral condensation, Obtura II along with System B, E and Q plus along with System B, and Thermafil, and to calculate the percentage of gutta-percha, sealer, and voids using an ImageJ software.
Results: Results between the warm vertical compaction (group I), lateral condensation (group II), Obtura II with System B (group III), E and Q plus with System B (group IV), and Thermafil (group V), group III showed the highest percentage of gutta-percha plus sealer and gutta-percha, and least number of voids, which was statistically significant (P < 0.000).
Conclusion: It can be concluded that Obtura II along with System B was found to be the most suitable obturation technique for the management of teeth exhibiting internal resorption. Thermafil was found to give the poorest obturation quality when used to fill the teeth with internal resorption. Similarly, lateral condensation technique was observed to show maximum sealer and hence was not ideal for the management of internal resorptive cavities.

Matched MeSH terms: Tooth Root
A case report of reattachment of fractured root fragment and resin-composite reinforcement in a compromised endodontically treated root

Lui JL

Dent Traumatol, 2001 Oct;17(5):227-30.
PMID: 11678543

The composite reinforcement technique has been used clinically to salvage damaged root-filled teeth compromised by caries, trauma, developmental abnormalities, internal resorption and iatrogenic causes. This clinical case report describes the use of the technique to reattach a fractured fragment in a compromised endodontically treated root besides reinforcing it for continued function in the mouth. Factors of clinical importance related to this additional application; including reattachment of tooth fragments, post crown retention, coronal microleakage and fracture resistance and strength, are also briefly discussed.

Matched MeSH terms: Tooth Root/injuries*
Fulltext A new classification system of trifid mandibular canal derived from Malaysian population

Al-Siweedi SYA, Ngeow WC, Nambiar P, Abu-Hassan MI, Ahmad R, Asif MK, et al.

Folia Morphol (Warsz), 2023;82(2):315-324.
PMID: 35285511 DOI: 10.5603/FM.a2022.0024

BACKGROUND: The purpose of this study was to identify and classify the anatomic variation of mandibular canal among Malaysians of three ethnicities.
MATERIALS AND METHODS: The courses of the mandibular canal in 202 cone-beam computed tomography scanned images of healthy Malaysians were evaluated, and trifid mandibular canal (TMC) when present, were recorded and studied in detail by categorizing them to a new classification (comprising of 12 types). The diameter and length of canals were also measured, and their shape determined.
RESULTS: Trifid mandibular canals were observed in 12 (5.9%) subjects or 16 (4.0%) hemi-mandibles. There were 10 obvious categories out the 12 types of TMCs listed. All TMCs (except one) were observed in patients older than 30 years. The prevalence according to ethnicity was 6 in Malays, 5 in Chinese and 1 in Indian. Four (33.3%) patients had bilateral TMCs, which was not seen in the Indian subject. More than half (56.3%) of the accessory canals were located above the main mandibular canal. Their mean diameter was 1.32 mm and 1.26 mm for the first and second accessory canal, and the corresponding lengths were 20.42 mm and 21.60 mm, respectively. Most (62.5%) canals had irregularly shaped lumen; there were more irregularly shaped canals in the second accessory canal than the first branch. None of the second accessory canal was oval (in shape).
CONCLUSIONS: This new classification can be applied for the variations in the branching pattern, length and shape of TMCs for better clinical description.

Matched MeSH terms: Tooth Root*
A new coding system for root and canal morphology - an online survey from Peru

Salas H, Torres J, Pauro J, Ahmed HMA

Int Endod J, 2021 Jan;54(1):147-149.
PMID: 33351981 DOI: 10.1111/iej.13439
Matched MeSH terms: Tooth Root*
A new system for classifying root and root canal morphology

Ahmed HMA, Versiani MA, De-Deus G, Dummer PMH

Int Endod J, 2017 Aug;50(8):761-770.
PMID: 27578418 DOI: 10.1111/iej.12685

Knowledge of root and root canal morphology is a prerequisite for effective nonsurgical and surgical endodontic treatments. The external and internal morphological features of roots are variable and complex, and several classifications have been proposed to define the various types of canal configurations that occur commonly. More recently, improvements in nondestructive digital image systems, such as cone-beam and micro-computed tomography, as well as the use of magnification in clinical practice, have increased the number of reports on complex root canal anatomy. Importantly, using these newer techniques, it has become apparent that it is not possible to classify many root canal configurations using the existing systems. The purpose of this article is to introduce a new classification system that can be adapted to categorize root and root canal configurations in an accurate, simple and reliable manner that can be used in research, clinical practice and training.

Matched MeSH terms: Tooth Root/anatomy & histology*
A new system for classifying tooth, root and canal anomalies

Ahmed HMA, Dummer PMH

Int Endod J, 2018 Apr;51(4):389-404.
PMID: 29023779 DOI: 10.1111/iej.12867

Understanding the normal anatomical features as well as the more unusual developmental anomalies of teeth, roots and root canals is essential for successful root canal treatment. In addition to various types of root canal configuration and accessory canal morphology, a wide range of developmental tooth, root and canal anomalies exists, including C-shaped canals, dens invaginatus, taurodontism, root fusion, dilacerations and palato-gingival grooves. There is a direct association between developmental anomalies and pulp and periradicular diseases that usually require a multidisciplinary treatment approach to achieve a successful outcome. A number of classifications have categorized tooth, root and canal anomalies; however, several important details are often missed making the classifications less than ideal and potentially confusing. Recently, a new coding system for classifying root, root canal and accessory canal morphology has been introduced. The purpose of this article is to introduce a new system for classifying tooth, root and canal anomalies for use in research, clinical practice and training, which can serve as complementary codes to the recently described system for classifying root, as well as main and accessory canal morphology.

Matched MeSH terms: Tooth Root/abnormalities*
A teratoma at the root of the nose

MARSDEN AT

Med J Malaya, 1959 Dec;14:106-10.
PMID: 14421490
Matched MeSH terms: Tooth Root*
A unit root test based on the modified least squares estimator

Wararit Panichkitkosolkul

Sains Malaysiana, 2014;43:1623-1633.

A unit root test based on the modified least squares (MLS) estimator for first-order autoregressive process is proposed and compared with unit root tests based on the ordinary least squares (OLS), the weighted symmetric (WS) and the modified weighted symmetric (MWS) estimators. The percentiles of the null distributions of the unit root test are also reported. The empirical probabilities of type I error and powers of the unit root tests were estimated via Monte Carlo simulation. The simulation results showed that all unit root tests can control the probability of type I error for all situations. The empirical power of the test is higher than the other unit root tests, and Apart from that, the and tests also provide the highest empirical power. As an illustration, the monthly series of U.S. nominal interest rates on three-month treasury bills is analyzed.

Matched MeSH terms: Tooth Root
Accessory roots and root canals in human anterior teeth: a review and clinical considerations

Ahmed HM, Hashem AA

Int Endod J, 2016 Aug;49(8):724-36.
PMID: 26174943 DOI: 10.1111/iej.12508

Anterior teeth may have aberrant anatomical variations in the number of roots and root canals. A review of the literature was conducted using appropriate key words in major endodontic journals to identify the available reported cases as well as experimental and clinical investigations on accessory roots and root canals in anterior teeth. After retrieving the full text of related articles, cross-citations were identified, and the pooled data were then discussed. Results revealed a higher prevalence in accessory root/root canal variations in mandibular anterior teeth than in maxillary counterparts. However, maxillary incisor teeth revealed the highest tendency for accessory root/root canal aberrations caused by anomalies such as dens invaginatus and palato-gingival groove. Primary anterior teeth may also exhibit external and internal anatomical variations in the root, especially maxillary canines. Therefore, dental practitioners should thoroughly assess all teeth scheduled for root canal treatment to prevent the undesirable consequences caused by inadequate debridement of accessory configurations of the root canal system.

Matched MeSH terms: Tooth Root/abnormalities*
Fulltext Accessory roots in maxillary molar teeth: a review and endodontic considerations

Ahmed HM, Abbott PV

Aust Dent J, 2012 Jun;57(2):123-31; quiz 248.
PMID: 22624750 DOI: 10.1111/j.1834-7819.2012.01678.x

Maxillary molar teeth may have accessory roots. The aim of this paper is to review and discuss the endodontic implications of this anatomical variation. A review of the literature was undertaken to identify studies and reported cases where accessory roots have been recorded in maxillary molar teeth. The results show that although the prevalence of accessory roots in maxillary molar teeth is low, they can exist in all three types of maxillary molar teeth, and they may be located palatally, buccally, mesially or distally. Hence, it is essential that dentists undertaking root canal treatment thoroughly assess all teeth to determine how many roots are present in order to provide the best possible outcome of treatment for the patient.

Matched MeSH terms: Tooth Root/anatomy & histology*
Age estimation using third molar development

Phrabhakaran N

Malays J Pathol, 1995 Jun;17(1):31-4.
PMID: 8907002

Teeth are the most durable structures in the human body. The pattern of their development has been used as a credible technique of age determination of unidentified bodies. Dental age estimation is by comparison of the dental status of an individual with published dental surveys. The third molars are the last teeth to erupt and are regarded as the most variable in the dentition. Nevertheless, radiographs depicting their growth have been used to determine the chronological age. A case for actual need for age estimation using a developing third molar is presented here.

Matched MeSH terms: Tooth Root
Aggressive periodontitis with a history of orthodontic treatment

Gupta VV, Ramachandra SS

J Indian Soc Periodontol, 2019 8 2;23(4):371-376.
PMID: 31367137 DOI: 10.4103/jisp.jisp_654_18

This report presents a 29-year-old aggressive periodontitis patient from Morocco with a history of orthodontic treatment. Despite all the first molars showing advanced bone loss, the maxillary anterior teeth did not show any periodontal destruction. The scientific literature rarely reports cases of aggressive periodontitis without involving maxillary anterior teeth. The treatment provided includes extraction of hopeless tooth, removal of overhanging restoration, scaling, root debridement, and regenerative periodontal therapy. The discussion highlights the dilemma during diagnosis of the case as either "iatrogenic periodontitis due to orthodontic treatment" or "localized aggressive periodontitis." The age group of 15-35 years is the common age group for patients' seeking orthodontic treatment and the occurrence of aggressive periodontitis. Sound knowledge of periodontitis and identification of early signs of aggressive periodontitis through meticulous periodontal examination may help in earlier identification and minimalistic treatment. Education regarding periodontitis, especially aggressive periodontitis, is essential among orthodontists and general dentists. This case report aims to discuss the dilemma involved during diagnosis of localized aggressive periodontitis.

Matched MeSH terms: Tooth Root
Fulltext Alternative Technique To Remove Lateral Periodontal Cystlike Lesion The Tunnelling Approach

Ngeow, W.C., Shanmuhasuntharam, P.

Ann Dent, 1997;4(1):-.
MyJurnal

Surgery done around gingival margin may eventually result in loss of attachment and recession of the gingiva. Root hypersensitivity is another possible complication when coupled with overzealous tooth brushing by the patients. This paper presents an alternative method to remove a lesion located at the lateral cervical third of a root. Its advantage is that the gingival margin is kept intact.

Matched MeSH terms: Tooth Root
Fulltext An alternative efficient technique for thin tooth sectioning

Babar, Muneer Gohar, Gonzalez, Ma Angela

International e-Journal of Science, Medicine & Education, 2011;5(1):27-30.
MyJurnal

Background: The importance of tooth sectioning is realized in disasters such as earthquake, airplane crash investigation, terror, micro leakage studies, age estimation etc. The objective of this study was to develop a simple method to make thin sections (approximately 100 mm) from freshly extracted teeth.

Methods: One hundred and twenty human premolars recently extracted for orthodontic purpose were used for this study. The teeth were stored in 0.5% chorlaramine for 2 weeks and were not allowed to dry at any stage of the experiment. The teeth were thoroughly washed in distilled water teeth and then were sectioned buccolingually from crown to the root portion.

Results: A detailed embedding-cutting-mounting procedure is described. The prepared thin ground sections were then examined under a Polarised light microscope for the enamel and the dentine, as well as the caries lesions can clearly be distinguished.

Conclusion: This is an effective and efficient method for preparation of ground sections in which the hard tissue details are preserved.

Matched MeSH terms: Tooth Root
Fulltext An ex-vivo comparative study of root-end marginal adaptation using grey mineral trioxide aggregate, white mineral trioxide aggregate, and Portland cement under scanning electron microscopy

Baranwal AK, Paul ML, Mazumdar D, Adhikari HD, Vyavahare NK, Jhajharia K

J Conserv Dent, 2015 Sep-Oct;18(5):399-404.
PMID: 26430305 DOI: 10.4103/0972-0707.164054

Where nonsurgical endodontic intervention is not possible, or it will not solve the problem, surgical endodontic treatment must be considered. A major cause of surgical endodontic failures is an inadequate apical seal, so the use of the suitable substance as root-end filling material that prevents egress of potential contaminants into periapical tissue is very critical.

Matched MeSH terms: Tooth Root
Application of a new system for classifying tooth, root and canal morphology in the primary dentition

Ahmed HMA, Musale PK, El Shahawy OI, Dummer PMH

Int Endod J, 2020 Jan;53(1):27-35.
PMID: 31390075 DOI: 10.1111/iej.13199

Knowledge of root and canal morphology is essential for the effective practice of root canal treatment. Paediatric endodontics aims to preserve fully functional primary teeth in the dental arch; however, pulpectomy procedures in bizarre and tortuous canals encased in roots programmed for physiologic resorption are unique challenges. A new coding system for classifying the roots and main canals (https://doi.org/10.1111/iej.12685), accessory canals (https://doi.org/10.1111/iej.12800) and developmental anomalies (https://doi.org/10.1111/iej.12867) has been introduced recently. This paper discusses challenges for describing root and canal morphology in primary teeth and describes the potential application of the new classification system for root canals in the primary dentition.

Matched MeSH terms: Tooth Root*
Assessment of the root and canal morphology in the permanent dentition of Saudi Arabian population using cone beam computed and micro-computed tomography - a systematic review

Mustafa M, Batul R, Karobari MI, Alamri HM, Abdulwahed A, Almokhatieb AA, et al.

BMC Oral Health, 2024 Mar 16;24(1):343.
PMID: 38493123 DOI: 10.1186/s12903-024-04101-3

INTRODUCTION: Root canal treatment procedures require a thorough understanding of root and canal anatomy. The purpose of this systematic review was to examine the morphological differences of teeth root and their canals assessed using cone-beam computed and micro-computed tomography in Saudi Arabian population.
METHODOLOGY: An electronic search was conducted in PubMed / Medline, Scopus, Google Scholar, and Web of Science databases until January 2023 to retrieve related studies. "Root canal morphology," "Saudi Arabia," "Micro-CT," and "cone-beam computed tomography" were used as keywords. A modified version of previously published risk of bias assessment tool was used to determine the quality assessment of included studies.
RESULTS: The literature search revealed 47 studies that matched the criteria for inclusion, out of which 44 studies used cone beam computed tomography (CBCT) and three were micro-computed tomography (micro-CT) studies. According to the modified version of risk of bias assessment tool, the studies were categorized as low, moderate, and high risk of bias. A total of 47,612 samples were included which comprised of either maxillary teeth (5,412), or mandibular teeth (20,572), and mixed teeth (21,327). 265 samples were used in micro-CT studies while 47,347 teeth samples were used in CBCT studies. Among the CBCT studies, except for three, all the studies were retrospective studies. Frequently used imaging machine and software were 3D Accuitomo 170 and Morita's i-Dixel 3D imaging software respectively. Minimum and maximum voxel sizes were 75 and 300 μm, Vertucci's classification was mostly used to classify the root canal morphology of the teeth. The included micro-CT studies were in-vitro studies where SkyScan 1172 X-ray scanner was the imaging machine with pixel size ranging between 13.4 and 27.4 μm. Vertucci, Ahmed et al. and Pomeranz et al. classifications were applied to classify the root canal morphology.
CONCLUSION: This systematic review revealed wide variations in root and canal morphology of Saudi population using high resolution imaging techniques. Clinicians should be aware of the common and unusual root and canal anatomy before commencing root canal treatment. Future micro-CT studies are needed to provide additional qualitative and quantitative data presentations.

Matched MeSH terms: Tooth Root/anatomy & histology
Bone regeneration at the distal aspect of the adjacent second molar after lower third molar coronectomy: a long-term analysis

Leung YY, Yeung AWK, Ismail IN, Wong NSM

Int J Oral Maxillofac Surg, 2020 Oct;49(10):1360-1366.
PMID: 32340909 DOI: 10.1016/j.ijom.2020.03.016

A residual bone defect at the distal aspect of the adjacent second molar may occur after total removal of the lower third molar. Lower third molar coronectomy has been proved to be a safe alternative to total removal, but the extent of bone regeneration at the adjacent tooth after coronectomy is not well reported. The aim of this prospective study was to investigate the long-term bone regeneration at the distal aspect of the adjacent second molar after lower third molar coronectomy. Preoperative and postoperative cone beam computed tomography scans were measured to assess bone regeneration at the distobuccal (DB), mid-distal (MD), and distolingual (DL) aspects of the lower second molar. Forty-eight coronectomies in 37 patients (23 female) with a mean±standard deviation age of 29.1±7.2 years were assessed. The mean follow-up was 93.2±8.7 months. The mean bone level increase at DB, MD, and DL aspects was 3.2±1.6mm, 3.5±1.5mm, and 3.2±1.6mm, respectively; the bone levels were significantly higher than the preoperative measurements (P<0.001). Age and impaction patterns were not factors affecting bone regeneration. Based on this study, it appears that coronectomy of the lower third molar brings favourable bone regeneration at the distal aspect of the adjacent second molar.

Matched MeSH terms: Tooth Root
Fulltext Caldwell-Luc Approach For Surgical Removal Of The Root From Maxillary Sinus With Closure Of Oro-Antral Fistula

Ong, A.H.

Ann Dent, 1997;4(1):-.
MyJurnal

The palatal root of the first permanent molar is the most commonly deflected root into the maxillary sinus during extraction. A rational approach to the surgical removal of a root from the antrum is important. Some surgeons prefer the alveolar approach while others prefer the Caldwell-Luc operation. A case is presented where the palatal root tip of the left upper first molar was removed from the maxillary sinus by the Caldwell-Luc approach with simultaneous closure of the oro-antral fistula resulting from dental extraction. A fibreoptic light probe was used. The advantages and disadvantages as well as how to avoid the common complications of this surgical technique are discussed. A good result was achieved with successful removal of the root and no loss of sensibility of the teeth and/or gum for this case.

Matched MeSH terms: Tooth Root
Capital- and consumption-led growth: case study on Malaysia, Singapore, Japan, and Zimbabwe

Mohd Azlan Abdul Majid, Mariam Setapa, Noorita Mohammad

CREAM : Current Research in Malaysia (Penyelidikan Terkini di Malaysia), 2012;1(1):151-187.
MyJurnal

Tujuan kertas kerja ini adalah untuk mengetahui hubungan, kesan ekonomi semasa dan faktor pencemaran terhadap modal, perbelanjaan terhadap pertumbuhan ekonomi terutamanya kepada Malaysia dan dibandingkan dengan negara seperti Jepun, Singapura dan Zimbabwe. Persoalan utama adalah sama ada modal dan perbelanjaan dapat berterusan menyumbangkan kepada pertumbuhan ekonomi ataupun tidak. Untuk mengkaji perhubungan, kami gunakan Test Unit Root (TUR); Augmented Dickey-Fuller Method (ADF), Phillip-Perron Test (PP) dan Kwiatkowski-Phillip-Schmidt-Shin (KPSS), Test Johansen Cointegration (TJC), diikuti Vector Error Correction Model (VECM) dan akhir sekali Test Granger Causality (TGC). Tujuan pengujian ini adalah untuk mengukur perhubungan, kestabilan dan kesahihan model. Kedua, untuk mengkaji kesan impak ekonomi kami gunakan Impulse Respond dan ujian Variance Decomposition yang menyelidik kesan berapa banyak dan berapa panjang model bertindakbalas kepada kesan Kegawatan Ekonomi Asia pada 1997 dan Kesan Serangan Pengganas di Amerika Syarikat pada September 2011. Ketiga kami juga megukur kesan perbelanjaan isi rumah dan kerajaan terhadap alam persekitaran. Kertas kerja ini mendapati, ia menyokong idea modal penjana pertumbuhan tetapi natijah perbelanjaan penjana pertumbuhan adalah berbeda mengikut tahap pertumbuhan. Di mana Malaysia dan Singapura menyokong sepenuhnya tetapi Jepun dan Zimbabwe hanya menyokong separa sahaja. Apabila kami mengukur impak kesan ekonomi pula, di dapati pada negara Zimbabwe tiada kesan antara krisis pada tahun 1997 ataupun pada 2001. Tetapi impak pada negara seperti Jepun, Malaysia dan Singapura pula berhadapan dalam posisi tidak baik pada krisis tahun 1997 tetapi keadaan yang baik pula pada krisis tahun 2001. Akhir sekali kami juga bangunkan theori pencemaran dimana untuk negara Zimbabwe ke semua pembolehubah seperti Perbelanjaan isi rumah (HC), Perbelanjaan Kerajaan (GC) dan Modal Tetap Kasar (GFC) tidak mempengaruhi pencemaran iaitu Karbon Dioksida (CO2). Tetapi natijah untuk negara Malaysia dan Singapura pula hanya HC mencipta CO2, tidak untuk GC dan GFC. Dan pengakhiran sekali Negara Jepun pula semua pembolehubah seperti GC,HC dan GFC mencipta pencemaran. Kesimpulannya krisis yang berlaku pada negara Amerika Syarikat pada tahun 2001 memberi kesan terus pada Negara Amerika tetapi tidak pada negara seperti Malaysia, Jepun dan Singapura, walhal negara-negara ini menadapat lambakan di dalam pasaran modal akibat perubahan ketidaktentuan dalam ekonomi Amerika seterusnya meningkatkan secara langsung Keluaran Dalam Negara Kasar (GDP). Walaubagaimanapun negara Zimbabwe tidak mempunyai kesan langsung sama ada sebelum atupun selepas masalah krisis ekonomi ini. Apabila kertas kerja ini mengkaji daripada sudut pembangunan lestari didapati Negara Zimbabwe seperti HC dan GC tidaklah mencemar seperti negara Malaysia dan Singapura yang menunjukkan HC punca pencemaran dan bukannya GC yang mungkin disebabkan skala ekonominya yang lebih kecil. Untuk negara Jepun pula disebabkan negara ini mempunyai skala ekonomi yang lebih besar HC dan GC adalah agen kepada pencemaran. Implikasinya model ini sepatutnya diambil kira dalam pembuat keputusan terutamanya untuk meninkatkan pertumbuhan ekonomi.

Matched MeSH terms: Tooth Root

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