Displaying publications 1 - 20 of 170 in total

  1. Wan Nur Alwani Wan Abdul Aziz, Azlan Jaafar, Ahmad Dzulfikar Samsudin
    The effect of surgical removal of impacted third molars on the periodontal
    parameters of adjacent second molar revealed inconsistent results. Some authors suggested
    improvement of periodontal parameters distal to second molar, whilst others demonstrated loss of
    attachment and reduction of alveolar bone height. This study was conducted to evaluate the
    alveolar bone height (ABH) and periodontal status of second molar after the surgery. (Copied from article).
    Matched MeSH terms: Molar; Molar, Third
  2. Al Bayaty, F.H., Baharuddin, N.A., Hussain, S.F.
    Ann Dent, 2007;14(1):52-55.
    The objectives of this study were to measure the Furcation Entrance Dimensions of first and second permanent molars in Malaysian samples and to compare the Furcation Entrance Dimensions with the blade widths of periodontal Gracey’s curette used for root surface instrumentation. A total of 199 extracted permanent teeth were measured, which comprised of 51 mandibular first molars, 51 mandibular second molars, 45 maxillary first molars and 52 maxillary second molars. Furcation Entrance Dimension was measured using calibrated test gauges. Results showed 51.91% of Furcation Entrance Dimension was
    Matched MeSH terms: Molar
  3. Katta NK, Kakkunath Mani S
    Clin Case Rep, 2020 Jul;8(7):1327-1328.
    PMID: 32695392 DOI: 10.1002/ccr3.2866
    When planning extraction of teeth with poor prognosis especially lower first permanent molars, it is important to consider the timing of tooth removal and its effect on future occlusion to avoid interventions.
    Matched MeSH terms: Molar
  4. Kaur R, Kumar AC, Garg R, Sharma S, Rastogi T, Gupta VV
    Indian J Dent, 2016 Apr-Jun;7(2):66-9.
    PMID: 27433048 DOI: 10.4103/0975-962X.184644
    The impaction rate is higher for the third molars than for any other tooth in modern human population. This study was conducted with the aim to evaluate the validity of linear and angular measurements on the digital panoramic radiograph as a reference for early prediction of mandibular third molar eruption/impaction.
    Matched MeSH terms: Molar; Molar, Third
  5. Siti Mazlipah Ismail, Firdaus Hariri
    Ann Dent, 2020;27(1):66-68.
    There is a wide variation in the morphology of third maxillary molar which can be difficult to be identified radiographically. We present a case of a 26 year-old Yemeni female patient presented with difficult extraction of her left maxillary third molar. The extracted tooth showed a rare variation of root morphology, having four roots with three roots curving palatally at the apices. This report emphasized the potential complex morphological variation of maxillary third molar which may lead to the difficulty of a routine straight forward procedure thus needing careful extraction maneuvering to prevent any complications.
    Matched MeSH terms: Molar; Molar, Third
  6. Sockalingam, S. Nagarajan M.P., Alida Mahyuddin
    Presence of accessory cusp on the occlusal surface of a tooth may occasionally pose problems to dentists'. Although its presents may not be a cause for alarm in most instances, nevertheless it can lead to serious consequences if it is damaged. This report describes a rare finding of bilateral central accessory cusp seen on the occlusal surface of both the 2nd maxillary deciduous molars and the need for continuous dental surveillance and preventive measures have been highlighted.
    Matched MeSH terms: Molar
  7. Ahmed HM
    Int Endod J, 2013 Nov;46(11):1011-22.
    PMID: 23711096 DOI: 10.1111/iej.12134
    Paediatric endodontics is an integral part of dental practice that aims to preserve fully functional primary teeth in the dental arch. Pulpectomy of primary molars presents a unique challenge for dental practitioners. Negotiation and thorough instrumentation of bizarre and tortuous canals encased in roots programmed for physiological resorption are the main challenges for this treatment approach. Consequently, numerous in vitro and in vivo studies have been conducted to validate the application of some contemporary endodontic armamentarium for effective treatment in primary molars whilst maintaining favourable clinical outcomes. Electronic apex locators, rotary nickel-titanium files and irrigation techniques are at the forefront of endodontic armamentarium in paediatric dentistry. Hence, this review aims to map out the root and root canal morphology of primary molars, to discuss the application of electronic apex locators in primary molars and to provide an update on the preparation of their root canal systems.
    Matched MeSH terms: Molar*
  8. Al-Amery SM, Nambiar P, Naidu M, Ngeow WC
    PLoS One, 2016 09 23;11(9):e0162773.
    PMID: 27662622 DOI: 10.1371/journal.pone.0162773
    The lingual nerve is a terminal branch of the mandibular nerve. It is varied in its course and in its relationship to the mandibular alveolar crest, submandibular duct and also the related muscles in the floor of the mouth. This study aims to understand the course of the lingual nerve from the molar area until its insertion into the tongue muscle. This cadaveric research involved the study of 14 hemi-mandibles and consisted of two parts: (i) obtaining morphometrical measurements of the lingual nerve to three landmarks on the alveolar ridge, and (b) understanding non-metrical or morphological appearance of its terminal branches inserting in the ventral surface of the tongue. The mean distance between the fourteen lingual nerves and the alveolar ridge was 12.36 mm, and they were located 12.03 mm from the lower border of the mandible. These distances were varied when near the first molar (M1), second molar (M2) and third molar (M3). The lingual nerve coursed on the floor of the mouth for approximately 25.43 mm before it deviated toward the tongue anywhere between the mesial of M1 and distal of M2. Thirteen lingual nerves were found to loop around the submandibular duct for an average distance of 6.92 mm (95% CI: 5.24 to 8.60 mm). Their looping occurred anywhere between the M2 and M3. In 76.9% of the cases the loop started around the M3 region and the majority (69.2%) of these looping ended at between the first and second molars and at the lingual developmental groove of the second molar. It gave out as many as 4 branches at its terminal end at the ventral surface of the tongue, with the presence of 2 branches being the most common pattern. An awareness of the variations of the lingual nerve is important to prevent any untoward complications or nerve injury and it is hoped that these findings will be useful for planning of surgical procedures related to the alveolar crest, submandibular gland/ duct and surrounding areas.
    Matched MeSH terms: Molar; Molar, Third
  9. Arora S, Gill GS, Setia P, Abdulla AM, Sivadas G, Vedam V
    Case Rep Dent, 2018;2018:7594147.
    PMID: 30402298 DOI: 10.1155/2018/7594147
    This article aims at providing an insight to the clinical modifications required for the endodontic management of severely dilacerated mandibular third molar. A 35-year-old patient was referred for the root canal treatment of the mandibular left third molar. An intraoral periapical radiograph revealed a severe curvature in both the canals. A wide trapezoidal access was prepared following the use of intermediate-sized files for apical preparation. Owing to increased flexibility, Hero Shaper NITI files were used for the biomechanical preparation and single cone obturation was carried out. Third molars owing to their most posterior location-limited access coupled with a severe curvature pose utmost clinical challenges require meticulous skill, advanced technology, and patience to achieve success.
    Matched MeSH terms: Molar; Molar, Third
  10. Majid H, Ramachandra SS, Kumar S, Wei M, Gundavarapu KC
    Compend Contin Educ Dent, 2022 Jan;43(1):e5-e8.
    PMID: 35019665
    This study evaluated the effect of alloplastic bone grafts in osseous defects following surgical removal of horizontally impacted third molars by comparing the periodontal measures distal to the second molar in grafted and nongrafted third molar extraction sites. Materials and Methods: A double-blind, randomized, controlled clinical trial was designed on subjects with bilateral horizontally impacted mandibular third molars. Grafting consisting of alloplasts at the third molar extraction sites was compared with nongrafted sites. This study assessed 54 randomized sites in 27 patients who were selected using a split-mouth design. The predictor variable included the change in pocket depth distal to the mandibular second molar and associated dentin hypersensitivity around the second molar, assessed preoperatively and at 3 and 6 months after third molar surgery. The data regarding pocket depth reduction was statistically analyzed using paired t-test. The data concerning reduction in dentin hypersensitivity was statistically analyzed using chi-square test. Results: Six months after third molar surgery, mean pocket depth distal to mandibular second molar decreased significantly at the grafted sites compared to the nongrafted sites. The reduction in dentin hypersensitivity of mandibular second molar was statistically significant for the grafted sites at 6 months, compared to the nongrafted sites.
    Matched MeSH terms: Molar, Third/surgery
  11. Ngeow, W.C., Zain, R.B., Chai, W.L.
    Ann Dent, 2000;7(1):-.
    The paradental cyst is an odontogenic cyst occurring near to the cervical margin of the lateral aspect of a root as a consequence of an inflammatory process in a periodontal pocket. A distinct form of the paradental cyst occurs not infrequently on the buccal aspects of erupted mandibular third molar, where there is an associated history of pericoronitis. A search of the literature revealed that these cysts had all been reported in relation to partially, newly or fully erupted molars. This report presents one case in which the cyst was noticed to be associated with an unerupted third molar. The histological appearance of the cyst and the gross relationship to the cemento-enamel junction is similar to those typical of paradental cysts reported in the literature. However, the radiographic and clinical appearance of the tooth being unerupted do not tally with paradental cyst and yet exclude the diagnosis of dentigerous cyst. The diagnosis of dental follicular tissue was excluded based on the histopathological presentation. The authors suggested that this case may represent an early form of paradental cyst which in the past may have been dismissed as dental follicular residues and thus, the prevalence of paradental cyst may have been under reported in the literature.
    Matched MeSH terms: Molar; Molar, Third
  12. 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: Molar*
  13. Menon RK, Kar Yan L, Gopinath D, Botelho MG
    J Investig Clin Dent, 2019 Nov;10(4):e12460.
    PMID: 31608608 DOI: 10.1111/jicd.12460
    AIM: Randomized controlled trials might be reporting a higher postoperative infection rate for third molar surgery compared to other study designs due to unclear criteria for the classification of "infections". The aim of the present retrospective study was to assess the infection rate after third molar surgery with and without postoperative antibiotic prescription.

    METHODS: Case records of patients who underwent third molar extractions at the Prince Philip Dental Hospital in Hong Kong between 3 July 2012 and 22 June 2017 were evaluated retrospectively. Data extraction was performed for indications, clinical and radiographic findings, antibiotic treatment, postoperative complications, and treatment for postoperative infection. The odds ratio (OR) for postoperative infection was estimated.

    RESULTS: In total, 1615 extracted over 5 years from 992 patient records were included in the final analysis. Antibiotics were prescribed postoperatively for 44% of the extractions. The overall infection rate was 2.05%. There was no significant difference in infection rates between the groups which underwent extractions with or without antibiotics (OR = .68; P = .289). We found a significantly higher risk for infections with increasing age (P = .002).

    CONCLUSION: Infection rates after third molar extraction is minimal in the current setting, with no significant benefit from postoperative antibiotic prescription.

    Matched MeSH terms: Molar, Third*
  14. Azizah Ahmad Fauzi, Mohamed Ebrahim Parker, Norval E., Phrabhakaran N
    Sains Malaysiana, 2017;46:59-65.
    Cone-beam-computed-tomography (CBCT) has been useful in providing insights of relevant anatomy prior to surgical
    procedures, including the assessment of the proximity of impacted mandibular-third-molar to the inferior-alveolar-canal
    (IAC). It is important to understand the reliability of conventional panoramic-radiograph in the assessment of this criterion
    since it is more commonly used as first line radiographic approach due to its availability and lower radiation dose. This
    study aimed to investigate the reliability of conventional panoramic-radiograph in the evaluation of the proximity of
    impacted mandibular-third-molar root tip to the IAC by correlating the results with CBCT. A total of 65 root tips of impacted
    mandibular-third-molars that had both panoramic radiographs and CBCT images were included in this retrospective study.
    Two trained observers participated in all image evaluations. A prepared standard 1 cm ruler was used to measure the
    proximity of the third-molar root apices to the IACs. Measurements recorded in this study were categorized into positive
    (root apex above a roof of IAC), zero (root apex was superimposed on IAC) and negative (root apex below a roof of IAC).
    Data analysis was carried out using student t-test. In this study, both observers recorded statistically significant differences
    in the measurement between third-molars root apices and the IAC from panoramic radiographs and CBCT images. The low
    reliability of panoramic radiograph to assess the vertical proximity between these two anatomical structures suggests
    the importance of additional assessment with CBCT in cases where panoramic radiograph shows superimposition of the
    third molar root on the roof of the canal and presence of root below the roof of the IAC.
    Matched MeSH terms: Molar; Molar, Third
  15. Farook MS, Mahmoud O, Ibrahim MA, Berkathullah M
    Biomed Res Int, 2021;2021:6652250.
    PMID: 33628801 DOI: 10.1155/2021/6652250
    Objectives: To evaluate the in vitro effectiveness of desensitizing agents in reducing dentine permeability.

    Methods: The efficacy of desensitizing agents in reducing dentine permeability by occluding dentine tubules was evaluated using a fluid filtration device that conducts at 100 cmH2O (1.4 psi) pressure, and SEM/EDX analyses were evaluated and compared. Forty-two dentine discs (n = 42) of 1 ± 0.2 mm width were obtained from caries-free permanent human molars. Thirty dentine discs (n = 30) were randomly divided into 3 groups (n = 10): Group 1: 2.7% wt. monopotassium-monohydrogen oxalate (Mp-Mh oxalate), Group 2: RMGI XT VAR, and Group 3: LIQ SiO2. Dentine permeability was measured following treatment application after 10 minutes, storage in artificial saliva after 10 minutes and 7 days, and citric acid challenge for 3 minutes. Data were analysed with a repeated measures ANOVA test. Dentine discs (n = 12) were used for SEM/EDX analyses to acquire data on morphological changes on dentine surface and its mineral content after different stages of treatment.

    Results: Desensitizing agents' application on the demineralized dentine discs exhibited significant reduction of permeability compared to its maximum acid permeability values. Mp-Mh oxalate showed a significant reduction in dentine permeability (p < 0.05) when compared to RMGI XT VAR and LIQ SiO2. On SEM/EDX analysis, all the agents formed mineral precipitates that occluded the dentine tubules.

    Conclusions: 2.7% wt. monopotassium-monohydrogen oxalate was significantly effective in reducing dentine permeability compared to RMGI XT VAR and LIQ SiO2.

    Matched MeSH terms: Molar/metabolism*
  16. Dalzell O, Mohd Ariffin S, Patrick CJ, Hardiman R, Manton DJ, Parashos P, et al.
    Eur Arch Paediatr Dent, 2021 Oct;22(5):911-927.
    PMID: 34146251 DOI: 10.1007/s40368-021-00641-2
    PURPOSE: Pulpectomy may be indicated in restorable primary teeth exhibiting irreversible pulpitis or pulpal necrosis. The purpose of this study was to compare the cleaning and shaping efficacy of NiTi systems (Reciproc® Blue and MTwo®) with manual stainless-steel instrumentation in primary molars using micro-CT analysis.

    METHODS: Fifty-seven maxillary second primary molars were scanned using micro-CT. Teeth with three divergent roots were divided randomly (n = 15) according to instrument type (K file, MTwo®, and Reciproc® Blue). Teeth with root fusion were instrumented manually as a separate group (n = 12). Pre- and post-instrumentation micro-CT images were superimposed, and the instrumentation area (IA) and procedural complications were recorded.

    RESULTS: No statistically significant differences in IA between file systems was observed in the non-fused teeth. The mean IA of fused roots was significantly lower than in the non-fused distobuccal (p = 0.003) and palatal (p  60%) occurred in both non-fused and fused primary teeth with fewer procedural complications observed after manual instrumentation.

    Matched MeSH terms: Molar/surgery
  17. Purmal K, Alam MK, Sukumaran P
    Dent Res J (Isfahan), 2013 Jan;10(1):81-6.
    PMID: 23878568 DOI: 10.4103/1735-3327.111805
    Bonding of molar tubes is becoming more popular in orthodontics. Occasionally, these bonding are done on posterior porcelain crowns or bridges. The purpose of this study was to evaluate the shear bond strength of buccal tubes on feldspathic porcelain crowns with two different methods.
    Matched MeSH terms: Molar
  18. Ngeow, W.C.
    Ann Dent, 1996;3(1):-.
    Supernumerarypremolars have been reported to occur in 0.29% of the general populationand to represent about 9.1% of all supernumerary teeth. Most of the supernumerary teeth reported in the literature were detected by radiographsas most of them were unerupted or impacted.Asearch of the literature revealed not many cases of fully erupted and well aligned supernumerary premolars being reported. A case of a unilateral transposed supernumery premolarthat had erupted into alignment is presented here. The remarkable featureof this case is that the supernumery premolar is transposed between the first and second permanent maxillary molars. The etiology of supernumeraryteeth is also reviewed.
    Matched MeSH terms: Molar
  19. Rusmah, M.
    Ann Dent, 1995;2(1):-.
    The root canal walls of twenty -five deciduous molar teeth with exposed and necrotic pulps were examined using thescanning electronmicroscope. Immediately after extraction, all teeth were fixed in Kamosky's solution. The coronal portion of the tooth was sectioned at about 2mm above the enamel cemental junction.The mesial and distal roots were separat~d and either split in the mesio-distal or bucco-lingual direction. All specimens were prepared for SEM. Obsevations showed that all roots were infected with organisms consisting of cocciand short rods. Some of the coccihad penetrated the dentine layer. However, the distribution of organisms is. not uniform throughout thecanals. Bacterialinvasion ismostinthecoronal region and reduces towards the apical region: Accompanying bacterial invasion is root canal walls deterioration. The odontoblastic processes are the first to deteriorate followed by the predentine layer.
    Matched MeSH terms: Molar
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