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Journal articles on the topic 'Molars Molar'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Kaye, E., B. Heaton, E. A. Aljoghaiman, A. Singhal, W. Sohn, and R. I. Garcia. "Third-Molar Status and Risk of Loss of Adjacent Second Molars." Journal of Dental Research 100, no. 7 (2021): 700–705. http://dx.doi.org/10.1177/0022034521990653.

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The prophylactic removal of asymptomatic third molars is a common but controversial procedure often rationalized as necessary to prevent future disease on adjacent teeth. Our objective in this retrospective cohort study of adult men was to examine whether second-molar loss differed by baseline status of the adjacent third molar, taking into account the individual’s overall state of oral hygiene, caries, and periodontitis. We analyzed data from participants of the VA Dental Longitudinal Study who had at least 1 second molar present at baseline and 2 or more triennial dental examinations between

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Baik, Un-Bong, Hong-Beom Choi, Yoon-Ji Kim, Dong-Yul Lee, Junji Sugawara, and Ravindra Nanda. "Change in alveolar bone level of mandibular second and third molars after second molar protraction into missing first molar or second premolar space." European Journal of Orthodontics 41, no. 5 (2019): 513–18. http://dx.doi.org/10.1093/ejo/cjz001.

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Summary Objective To investigate the factors associated with the change in alveolar bone level of mandibular second and third molars after second molar protraction into the space of the missing first molar (L6) or second premolar (LE). Methods Fifty-one patients in whom space of the missing L6 or LE was treated with second molar protraction (13 males, 38 females, mean age 19.6 ± 4.7 years) from 2003 to 2015 were included. The alveolar bone level and position and angulation of the mandibular second and third molars were measured in panoramic radiographs at pre-treatment (T1), and after the alig

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Kwon, Woojin, Hyung-Jun Choi, Jaeho Lee, and Je Seon Song. "Analysis of Prevalence of Pyramidal Molars in Adolescent." JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 47, no. 4 (2020): 389–96. http://dx.doi.org/10.5933/jkapd.2020.47.4.389.

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A pyramidal molar is which has completely fused roots with a solitary enlarged canal. The purpose of this retrospective study was to assess the prevalence and characteristics of pyramidal molars among adolescent.<br/>A total of 1,612 patients’ panoramic radiographs were screened. A total of 12,896 first and second molars were evaluated. The relative incidence and the correlations regarding the location of pyramidal molar (maxillary versus mandibular) and gender were analyzed using the chi-square test.<br/>The overall incidence of patients with pyramidal molars was 1.49%. 24 patient

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Karlsson, Ingela, and Lars Bondemark. "Intraoral Maxillary Molar Distalization." Angle Orthodontist 76, no. 6 (2006): 923–29. http://dx.doi.org/10.2319/110805-390.

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Abstract Objective: To evaluate the maxillary molar distalization and anchorage loss in two groups, one before (MD 1 group) and one after (MD 2 group) eruption of second maxillary molars. Materials and Methods: After a sample size calculation, 20 patients were recruited for each group from patients who fulfilled the following criteria: no orthodontic treatment before distal molar movement, Class II molar relationship defined by at least end-to-end molar relationship, space deficiency in the maxilla, and use of an intra-arch NiTi coil appliance with a Nance appliance to provide anchorage. Patie

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Baik, Un-Bong, Yoon-Ah Kook, Mohamed Bayome, Je-Uk Park, and Jae Hyun Park. "Vertical eruption patterns of impacted mandibular third molars after the mesialization of second molars using miniscrews." Angle Orthodontist 86, no. 4 (2014): 565–70. http://dx.doi.org/10.2319/061415-399.1.

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ABSTRACT Objective: To investigate (1) whether vertical eruption of impacted third molars improves after mesialization of second molars and (2) what factors affect the vertical eruption of impacted third molars when space caused by missing molars is successfully closed by mesialization of the second molar using miniscrews. Materials and Methods: The treatment group (Group 1) included 52 patients who had (1) missing mandibular first molars (ML-6) or missing deciduous mandibular second molars (ML-E), (2) initially impacted mandibular third molars, and (3) successful space closure of the edentulo

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Flores-Mir, Carlos, Lisa McGrath, Giseon Heo, and Paul W. Major. "Efficiency of molar distalization associated with second and third molar eruption stage." Angle Orthodontist 83, no. 4 (2012): 735–42. http://dx.doi.org/10.2319/081612-658.1.

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ABSTRACT Objective: To evaluate the efficiency of molar distalization associated with the second and third molar eruption stage. Materials and Methods: A systematic computerized database search was conducted using several databases. Adaptations of the terms molar distalization and distalizing appliances were used. The reference lists of all the selected articles were also searched for any potential articles that might have been missed in the electronic search. The data provided in the selected publications were grouped and analyzed in terms of molar distalization with respect to various erupti

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Baik, Un-Bong, Jin Hye Kang, Ui-Lyong Lee, Nikhilesh R. Vaid, Yoon-Ji Kim, and Dong-Yul Lee. "Factors associated with spontaneous mesialization of impacted mandibular third molars after second molar protraction." Angle Orthodontist 90, no. 2 (2019): 181–86. http://dx.doi.org/10.2319/050919-322.1.

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ABSTRACT Objectives: To investigate factors associated with spontaneous mesialization of impacted third molars after second molar protraction to close the space caused by a missing mandibular first molar (L-6) or retained deciduous mandibular second molars with a missing succedaneous premolar (L-E). Materials and Methods: Panoramic radiographs of patients treated with mandibular second molar protraction to close the space due to missing L-6 or L-E (14 males, 36 females, mean age = 18.6 ± 4.4 years) were analyzed before treatment (T1) and after second molar protraction (T2). Factors associated

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Ren, Calvin Gan Chee, and B. Senthil Kumar. "Prevalence of Eruption of Third Molar Tooth among South Indians and Malaysians." Journal of Academy of Dental Education 1, no. 1 (2014): 32. http://dx.doi.org/10.18311/jade/2014/2427.

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<strong>Introduction:</strong>In prehistoric humans, when the jaw size permitted space for normal dental development and position in the arches, third molar may have been a vital survival tool. However, as human evolution has progressed, jaw size has been gradually decreasing (Lamarckian Evolution). Hence due to the decrease in size of the jaw bone, it’s been reported that approximately 65% of the human population has at least one impacted third molar, and third molars that do erupt are often malposed in the arches and are consequently difficult to clean and prone for infection.&lt

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Orhan, Büyük Kaan, Dilek Yılmaz, Mehmet Ozgur Ozemre, Kıvanç Kamburoğlu, Orhan Gulen, and Ayse Gulsahi. "Evaluation of Mandibular Third Molar Region in a Turkish Population Using Cone-Beam Computed Tomography." Current Medical Imaging Formerly Current Medical Imaging Reviews 16, no. 9 (2020): 1105–10. http://dx.doi.org/10.2174/1573405616666200103094611.

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Objectives: To evaluate impacted mandibular third molar tooth region and obtain linear measurements using CBCT images and to assess the relationship between the impacted third molar and the mandibular canal. Methods: CBCT scans of 351 patients (208 females, 143 males) were assessed. Age, gender, and impaction site were recorded for each patient. The relationship of third molars with the vertical axis of second molars, 2nd molar resorption and the relationship between third molar apices and the mandibular canal were assessed. In addition, the distance between ramus and second molar, mesiodistal

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Pallippurath, Girish, Neeta Shetty, Rayapudi Phani Mohan, Manuel S. Thomas, and Arjun Tallada. "Evaluation of the Root and Canal Morphology of Maxillary First and Second Molar using Cone Beam Computed Tomography: A Retrospective Study." World Journal of Dentistry 8, no. 2 (2017): 134–38. http://dx.doi.org/10.5005/jp-journals-10015-1426.

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ABSTRACT Aim The aim of this study was to investigate the root and canal morphology of maxillary first and second molars in Southern West Coastal Indian population using cone beam computed tomography (CBCT). Materials and methods Cone beam computed tomography images of (n = 143) maxillary first molar and (n = 139) maxillary second molar were obtained from Southern West Coastal Indian population. The number of roots, root canals, and presence of second mesiobuccal (MB2) canal were determined. Results Two roots were seen only in 1.4% of first molars and 8.6% of second molars. Three- rooted were

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Ko, Daisy (Jihyung), Tess Kelly, Lacey Thompson, et al. "Timing of Mouse Molar Formation Is Independent of Jaw Length Including Retromolar Space." Journal of Developmental Biology 9, no. 1 (2021): 8. http://dx.doi.org/10.3390/jdb9010008.

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For humans and other mammals to eat effectively, teeth must develop properly inside the jaw. Deciphering craniodental integration is central to explaining the timely formation of permanent molars, including third molars which are often impacted in humans, and to clarifying how teeth and jaws fit, function and evolve together. A factor long-posited to influence molar onset time is the jaw space available for each molar organ to form within. Here, we tested whether each successive molar initiates only after a minimum threshold of space is created via jaw growth. We used synchrotron-based micro-C

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de Lange, J. "Third molars and second molar distal caries." International Journal of Oral and Maxillofacial Surgery 39, no. 6 (2010): 630. http://dx.doi.org/10.1016/j.ijom.2010.02.005.

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Genaro, Luis Eduardo, Gabriely Ferreira, Marcelo Brito Conte, Marcela de Almeida Gonçalves, and Ticiana Sidorenko Oliveira Capote. "Morphological Differences between the First and Second Permanent Upper Molars." Journal of Morphological Sciences 36, no. 04 (2019): 303–8. http://dx.doi.org/10.1055/s-0039-1695756.

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AbstractThe dental elements present similar and specific anatomical features, depending on the functions they have in the oral cavity. The permanent molars are the most complex structures, mainly the occlusal face, due to their function of food grinding. The aim of the present article is to present the upper first and second molars morphology, emphasizing the similarities and differences between them. Besides, the upper first and second molars of the collection of the Department of Morphology of Universidade Estadual de Paulista (UNESP), School of Dentistry, Araraquara, were evaluated regardin

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Nepal, Manisha, Vanita Gautam, Snigdha Shubham, Rupam Tripathi, and Rinku Sah. "An Insight into Anatomical Variations in Maxillary Molars: A Case Series." Journal of Universal College of Medical Sciences 6, no. 2 (2018): 76–78. http://dx.doi.org/10.3126/jucms.v6i2.22502.

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The aim of this article is to show different anatomic complexities of the root canal system related to maxillary molars. Maxillary molars are presumed to have only three roots with three canals but this is not always the case, it might present with different variations. Some of the anatomical variations such as, mesiobuccal2 (MB2) canals in maxillary 1st and 2nd molars, two rooted maxillary 1st and 2nd molar, one rooted maxillary 2nd molar, C-shaped upper 2nd molar and maxillary 2nd molar with extra palatal root are reported in this case series. Hence, in treating each tooth every dentist must

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Magnusson, Cathrine, and Heidrun Kjellberg. "Impaction and Retention of Second Molars: Diagnosis, Treatment and Outcome." Angle Orthodontist 79, no. 3 (2009): 422–27. http://dx.doi.org/10.2319/021908-97.1.

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Abstract Objective: To evaluate treatment outcome in patients with second molar impaction and retention. Materials and Methods: A total of 135 second molars, 65 in the maxilla and 70 in the mandible were collected from 87 patients (45 girls and 42 boys) with a mean age of 15 years (range: 11– 19 years). Available patient records, x-rays, study casts, and photos were studied. The mean follow-up period was 22 months (range: 4–106 months). Results: A total of 166 second molars were diagnosed as impacted, 24 as primary and 5 as secondarily retained; 80% of the second molars were orthodontically or

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Ashar, Talha, Asma Shakoor, Sadia Ghazal, Naghma Parveen, Muhammad Nasir Saleem, and Hina Zafar Raja. "Prevalence of Distal Carious Lesions in Mandibular Second Molars Due to Mesio-Angular Impacted Third Molars." Journal of the Pakistan Dental Association 30, no. 1 (2021): 50–55. http://dx.doi.org/10.25301/jpda.301.50.

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OBJECTIVE: This study was conducted to observe the relationship of mesio-angular impacted third molars to the development of distal caries in adjacent second molars. METHODOLOGY: This cross-sectional study was conducted at Nishtar Institute of Dentistry, Multan. Nine hundred and eighty nine periapical, bitewing and Panoramic radiographs were recorded and examined for distally carious second molars and impacted mandibular third molars. SPSS version 23.0 was used for data entry and analysis. RESULTS: Almost 40.8% of the target population reported with distal caries due to third molar impactions.

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Smith, R. "The Effects of Extracting Upper Second Permanent Molars on Lower Second Permanent Molar Position." British Journal of Orthodontics 23, no. 2 (1996): 109–14. http://dx.doi.org/10.1179/bjo.23.2.109.

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There is some controversy over whether the extraction of upper second permanent molars as part of orthodontic treatment leads to the over eruption of unopposed lower second permanent molars. A study was established to investigate the presence of any over-eruption in a group of subjects who had upper second permanent molars extracted as part of a previous course of orthodontic treatment. These subjects (the experimental group) were compared with a control group of subjects, matched for age and sex. Upper and lower impressions were taken, and the vertical positions of the posterior teeth were ob

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Choi, Yoomin, Seonmi Kim, and Namki Choi. "Assessment of Root and Root Canal Morphology of Human Primary Molars using CBCT." JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 47, no. 1 (2020): 25–35. http://dx.doi.org/10.5933/jkapd.2020.47.1.25.

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The purpose of this study is to evaluate the morphological characteristics of the roots and roots canals of primary molar teeth using Cone-Beam Computed Tomography (CBCT).<br/>A total of 68 CBCT images of children aged 4 - 5 years was used for this study. A total of 160 molar teeth were analyzed. Various parameters such as the number of roots and canals, length of root and root canal, and the angulation and shape of the roots were analyzed.<br/>All maxillary primary molars had 3 roots. The presence of 2 root canals in 1 root was only observed in the mesiobuccal root of maxillary pr

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Estrela, Carlos, Keila SA Oliveira, Ana Helena G. Alencar, Fernando B. Barletta, Cyntia RA Estrela, and Wilson T. Felippe. "Oxygen Saturation in the Dental Pulp of Maxillary and Mandibular Molars - Part 2." Brazilian Dental Journal 28, no. 6 (2017): 704–9. http://dx.doi.org/10.1590/0103-6440201701447.

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Abstract This study determined the oxygen saturation (SaO2) in dental pulp of healthy maxillary and mandibular molars. Mean of SaO2 was evaluated in 112 maxillary and mandibular molars using pulse oximetry. Quantitative variables were described by mean and standard deviation. Variables with symmetric distribution were compared by Student t test and Mann-Whitney test. Pearson’s correlation coefficient was used to correlate quantitative variables. Analysis of variance was used to assess differences in SaO2 levels between the molar groups, followed by post-hoc Tukey. The significance level establ

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Tantanapornkul, Weeraya, Darika Mavin, Jaruthai Prapaiphittayakun, Natnicha Phipatboonyarat, and Wanchanok Julphantong. "Accuracy of Panoramic Radiograph in Assessment of the Relationship Between Mandibular Canal and Impacted Third Molars." Open Dentistry Journal 10, no. 1 (2016): 322–29. http://dx.doi.org/10.2174/1874210601610010322.

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Background: The relationship between impacted mandibular third molar and mandibular canal is important for removal of this tooth. Panoramic radiography is one of the commonly used diagnostic tools for evaluating the relationship of these two structures. Objectives: To evaluate the accuracy of panoramic radiographic findings in predicting direct contact between mandibular canal and impacted third molars on 3D digital images, and to define panoramic criterion in predicting direct contact between the two structures. Methods: Two observers examined panoramic radiographs of 178 patients (256 impact

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Gkantidis, Nikolaos, Manuel Tacchi, Elias S. Oeschger, Demetrios Halazonetis, and Georgios Kanavakis. "Third Molar Agenesis Is Associated with Facial Size." Biology 10, no. 7 (2021): 650. http://dx.doi.org/10.3390/biology10070650.

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Individuals with congenitally missing permanent teeth, other than third molars, present smaller craniofacial configurations compared to normal controls. However, it is not known if agenesis of third molars is part of the same mechanism. Therefore, this study assessed individuals with and without isolated third molar agenesis and tested the relation of this condition to the size of their facial configurations, using geometric morphometric methods. We show that the absence of one or more third molars is associated with a smaller maxilla, smaller mandible and a smaller overall facial configuratio

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Gökçe, Gökçenur, Burçin Akan, and Ilknur Veli. "The role of impacted third molar angulation on the anterior crowding." APOS Trends in Orthodontics 11 (April 10, 2021): 56–61. http://dx.doi.org/10.25259/apos_158_2020.

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Objectives: The aim of this study was to assess the role of impacted third molar angulation on the severity of anterior crowding. Materials and Methods: Panoramic radiographs and three-dimensional (3D) digital models of 45 patients satisfying the following inclusion criteria were selected for this study. To calculate the irregularity index of Little, the sum of the contact point displacements from the anatomical contact point to the contact point among the lower canine teeth was measured on 3D digital models. Little’s irregularity index was used to classify patients as having mild, moderate, o

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Viqar, Sana, Sadia Rizwan, Syed Shah Faisal, and Syed Sheeraz Hussain. "The Frequency of Mandibular Third Molar Impaction in Different Types of Vertical Skeletal Faces." Journal of the Pakistan Dental Association 30, no. 02 (2021): 118–23. http://dx.doi.org/10.25301/jpda.302.118.

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OBJECTIVE: To determine the frequency of mandibular third molar impaction in different vertical skeletal facial types. METHODOLOGY: Data was collected using pre-treatment records including orthodontic files, pre-treatment lateral cephalograms and OPGs of 90 orthodontic patients. Patients from both genders were included. The age group of selected patients was 18-30 years. Vertical skeletal malocclusion was measured using facial angle and mandibular plane angle on cephalogram to group the subjects into Mesiofacial, Brachyfacial and Dolichofacial patients. Third molar eruption status was assessed

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Scheiwiller, Maya, Elias S. Oeschger, and Nikolaos Gkantidis. "Third molar agenesis in modern humans with and without agenesis of other teeth." PeerJ 8 (November 17, 2020): e10367. http://dx.doi.org/10.7717/peerj.10367.

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Background The number of teeth in the human dentition is of interest both from developmental and evolutionary aspects. The present case-control study focused on the formation of third molars in modern humans aiming to shed more light on the most variable tooth class in the dentition. Materials and Methods For this reason, we investigated third molar formation in a sample of 303 individuals with agenesis of teeth other than third molars (agenesis group) and compared it to a sex and age matched control group of 303 individuals without agenesis of teeth other than third molars. Results The preval

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Jacob, Helder Baldi, Shawn LeMert, Richard G. Alexander, and Peter H. Buschang. "Second molar impaction associated with lip bumper therapy." Dental Press Journal of Orthodontics 19, no. 6 (2014): 99–104. http://dx.doi.org/10.1590/2176-9451.19.6.099-104.oar.

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INTRODUCTION: Although lip bumpers (LBs) provide significant clinical gain of mandibular arch perimeter in mixed-dentition patients, orthodontists are reluctant to use them due to the possibility of permanent second molar eruptive disturbances.OBJECTIVE: The present study was conducted to assess second molar impaction associated with the use of LBs, and to investigate how they can be solved.MATERIAL AND METHODS: Lateral and panoramic radiographs of 67 patients (34 females and 33 males) were assessed prior (T1) and post-LB treatment (T2). LB therapy lasted for approximately 1.8 ± 0.9 years. Con

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Rezaie, Mostafa, Jannan Ghapanchi, Abdolaziz Haghnegahdar, Leila Khojastehpour, Hooman Khorshidi, and Heshmatollah Heidari. "A Radiographic Evaluation of Missing of Permanent First Molars in a Group of Iranian Children and Adults: A Retrospective Study." International Journal of Dentistry 2018 (2018): 1–4. http://dx.doi.org/10.1155/2018/5253965.

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The missing of permanent first molars influences the occlusal status and dental health. The purpose of this study was to determine the prevalence of missing first molar teeth in a selected population of Shiraz, Iran. Methods. A total of 2206 panoramic views of patients aged from 7 to 75 years old were inspected for missing of permanent first molars. Patients were categorized into five age groups: from 7 to 15, 16 to 30, 31 to 45, 46 to 60, and more than 60 years old. Data were categorized according to sex, age, and number of lost teeth using SPSS software. Results. No first molar was missing i

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Mehra, Anhad, Venkatesh Anehosur, and Niranjan Kumar. "Impacted Mandibular Third Molars and Their Influence on Mandibular Angle and Condyle Fractures." Craniomaxillofacial Trauma & Reconstruction 12, no. 4 (2019): 291–300. http://dx.doi.org/10.1055/s-0039-1685459.

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The aim of this study is to retrospectively analyze the effect unerupted or partially erupted third molars have on the angle and condyle fracture patterns of the mandible. It also focuses on evaluating the type of impaction that causes angle fracture and the level at which the condyle most commonly fractures. The study involves all the patients who had undergone treatment for condylar and angle of the mandible fractures from 2010 to 2017 in our craniofacial center. The case records and orthopantomograms of each patient were taken into consideration and a correlation was established based on ge

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Lee, Dongyun, and Jisun Shin. "Generalized Pulp Stones of Primary Dentition in a Patient with Molar-Incisor Malformation : A Case Report." JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 47, no. 3 (2020): 337–43. http://dx.doi.org/10.5933/jkapd.2020.47.3.337.

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Molar-incisor malformation (MIM) is a new type of root anomaly reported recently. The characteristics of MIM are dysplastic root formations, constriction of pulp chambers and presence of calcified matrices at the level of cementoenamel junction in permanent first molars and primary second molars. In some cases, permanent maxillary incisors are also affected.The permanent first molars of the patient in this case report were affected with MIM. Generalized pulp stones were observed in overall primary dentition. Micro-computed tomography (micro-CT) imaging and scanning electron microscope-energy d

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Cansiz, Erol, Sabri Cemil Isler, and B. Alper Gultekin. "Removal of Deeply Impacted Mandibular Molars by Sagittal Split Osteotomy." Case Reports in Dentistry 2016 (2016): 1–3. http://dx.doi.org/10.1155/2016/1902089.

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Mandibular third molars are the most common impacted teeth. Mandibular first and second molars do not share the same frequency of occurrence. In rare cases the occlusal surfaces of impacted molars are united by the same follicular space and the roots pointing in opposite direction; these are called kissing molars. In some cases, a supernumerary fourth molar can be seen as unerupted and, in this case, such a supernumerary, deeply impacted fourth molar is seen neighboring kissing molars. The extraction of deeply impacted wisdom molars from the mandible may necessitate excessive bone removal and

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Song, Min Sun, Chung-Min Kang, Je Seon Song, Hyung-Jun Choi, Jaeho Lee, and Seong-Oh Kim. "Modifications of Rect-Spring to Enhance the Engagement of Ectopically Entrapped Molars with 2 Case Reports." Children 8, no. 9 (2021): 823. http://dx.doi.org/10.3390/children8090823.

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The Rect-spring appliance, used for the management of ectopically erupting molars, shows weak retention on mesially tilted molars. We present three modifications of the appliance for better engagement and their advantages. We describe cases of two 7-year-old patients with ectopically erupting maxillary first molars with a 2.2 mm and 2.5 mm depth of entrapment, respectively. The modified Rect-spring (mRS) was inserted between the ectopically erupting first molar and adjacent primary second molar, and exerted a distalization force with an interproximal wedging effect at the same time. After 3 mo

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Matijevic, Stevo, and Marjan Marjanovic. "Clinical study of the lower third molars eruption level influence on incidence of acute infection." Serbian Dental Journal 52, no. 2 (2005): 83–89. http://dx.doi.org/10.2298/sgs0502083s.

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The aim of this paper was estimate if there was correlation between clinically and radiographically evaluated eruption level of the lower third molar and incidence and severity of the acute infection, respectively. Methods and material: The study was conducted in 100 male examinees, age range from 18 to 25 years old, with clinical and radiographic diagnosis of partially erupted or non erupted third molars. Results: Total number of examinees with clinically registered partially erupted lower third molars was 75, of which 62 (82.6%) manifested infection. Non erupted third molars were in 25 exami

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Kim, Min Jin, Ji-Soo Song, Young-Jae Kim, Jung-Wook Kim, Ki-Taeg Jang, and Hong-Keun Hyun. "Clinical Considerations for Dental Management of Children with Molar-Root Incisor Malformations." Journal of Clinical Pediatric Dentistry 44, no. 1 (2020): 55–59. http://dx.doi.org/10.17796/1053-4625-44.1.10.

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Molar root-incisor malformation (MRIM) or molar-incisor malformation (MIM) is a new type of dental anomaly characterized by dysplastic roots of permanent first molars, occasionally second primary molars, and the crowns of maxillary central incisors. MRIM involving permanent first molars and second primary molars is characterized by normal crowns with short, thin, and narrow roots, whereas MRIM involving permanent maxillary central incisors exhibits constrictions of the crown in the cervical area. In the first case, we extracted the affected first permanent molars at the optimal timing to minim

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Tsai, Hung-Huey. "Morphological characteristics of the deciduous teeth." Journal of Clinical Pediatric Dentistry 25, no. 2 (2002): 95–101. http://dx.doi.org/10.17796/jcpd.25.2.l871896721408pt6.

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The morphology of the deciduous teeth was investigated. The mean mesiodistal crown dimensions of the deciduous canine, first and second molars and the mean buccolingual crown dimensions of the deciduous second molars in both dental arches of boys were significantly larger than that of girls. The upper deciduous first molar of girls was slender buccolingually and the lower deciduous second molar of boys was slender mesiodistally.

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Sunny, Basil, PK Thripti Raj, B. Goutham, Sunil Muddaiah, Sanju Somaiah, and Balakrishna Shetty. "A novel technique to preserve Molar anchorage following Distalization using mini implants." JOURNAL OF MULTIDISCIPLINARY DENTAL RESEARCH 6, no. 2 (2020): 50–52. http://dx.doi.org/10.38138/jmdr/v6i2.8.

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Molar distalization is an effective treatment modality in orthodontic treatment. However, preserving molar anchorage after distalization is a difficult task faced by the orthodontist since long. Through this article we will be presenting an innovative technique to hold the distalized position of molars using mini implants. This simple but effective method has proved to be useful to hold the distalized position of molars. Keywords: Distalization; mini implants

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Alkhatib, Rola, and Chun-Hsi Chung. "Buccolingual inclination of first molars in untreated adults: A CBCT study." Angle Orthodontist 87, no. 4 (2017): 598–602. http://dx.doi.org/10.2319/110116-786.1.

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ABSTRACT Objective: To evaluate the buccolingual inclinations of maxillary and mandibular first molars in untreated adults. Materials and Methods: Fifty-nine subjects (14 males and 45 females; mean age, 41.2 years) with no missing teeth, no crossbite, and minimal crowding were included. For each subject, a CBCT was taken. The long axis of each first molar was determined, and the inclination of each molar was measured using the long axis and the floor. Results: One hundred seventeen out of 118 mandibular first molars measured had a lingual inclination, with a mean of 12.59° ± 5.47°. For the max

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Deshmukh, Shailesh, and Rajesh Kshirsagar. "Evaluation of the periodontal status of uprighted mandibular second molars using microscrews placed in the retromolar area: A comparison of two surgical techniques." APOS Trends in Orthodontics 7 (April 1, 2017): 80–86. http://dx.doi.org/10.4103/apos.apos_15_17.

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Objective Permanent mandibular second molar impaction can lead to dental problems including periodontal pockets. In this study, uprighting of impacted mandibular second molars was carried out. Two surgical techniques were compared for time taken to upright the impacted mandibular second molar and if any periodontal pocket was formed on the distal aspect of the uprighted molar due to the surgical removal of bone distal to the impacted second molar after uprighting. Materials and Methods A total of 20 subjects with impacted mandibular second molars were chosen from our orthodontic practice for t

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Popovic, Milica, Suzana Zivanovic, Tamara Vucicevic, Miona Grujovic, and Milos Papic. "Cone-beam computed tomography study of tooth root and canal morphology of permanent molars in a Serbian population." Vojnosanitetski pregled 77, no. 5 (2020): 470–78. http://dx.doi.org/10.2298/vsp180322100p.

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Background/Aim. For successful endodontic therapy, it is necessary to know root morphology. Therefore, the aim of our study was to analyze root canal morphology and root canal length of permanent molars in a Serbian population, using cone-beam computed tomography (CBCT). Methods. The study included a total of 305 maxillary molars, and 280 mandibular molars receiving cone-beam computed tomography examination and determined root numbers, canal morphology according to Vertucci classification, and canal lengths. Results were correlated with sex and tooth location in the jaw. Results. The mesiobucc

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Türköz, Çağrı, and Çağrı Ulusoy. "Effect of premolar extraction on mandibular third molar impaction in young adults." Angle Orthodontist 83, no. 4 (2013): 572–77. http://dx.doi.org/10.2319/101712-814.1.

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ABSTRACT Objective: To test the null hypothesis that orthodontic therapy with or without premolar extraction does not result in any difference in third molar impaction. Materials and Methods: Two groups were formed: 22 patients in one group with first premolar extractions and 22 patients in the other group without extractions. All patients were nongrowing subjects who had normal gonial angles and were skeletal Class I at the beginning of treatment. The available space for third molars, inclination of second and third molars, and angle between the second and third molars were evaluated. Also, t

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Ivanovic, Mirjana, Vesna Zivojinovic, Dejan Markovic, and Mirjana Sindolic. "Treatment options for hypomineralized first permanent molars and incisors." Serbian Dental Journal 53, no. 3 (2006): 174–80. http://dx.doi.org/10.2298/sgs0603174i.

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The aim of this study was to discuss therapy possibilities in the management of molar incisor hypomineralization. Molar incisor hypomineralization (MIH) is defined as hypomineralization of one or more first permanent molars frequently affecting incisors. Etiology of MIH is not fully clarified and numerous etiological factors have been cited. Hypomineralized molars are more prone to caries, cause severe restorative problems and are frequently extracted due to serious damage and caries complications. Incisors can present demarcated enamel opacities, while enamel breakdown is uncommon. Clinically

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Ugolini, Alessandro, Carmen Cerruto, Luca Di Vece, et al. "Dental arch response to Haas-type rapid maxillary expansion anchored to deciduous vs permanent molars: A multicentric randomized controlled trial." Angle Orthodontist 85, no. 4 (2014): 570–76. http://dx.doi.org/10.2319/041114-269.1.

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ABSTRACT Objective: To assess maxilla and mandibular arch widths' response to Haas-type rapid maxillary expansion (RME) anchored to deciduous vs permanent molars on children with unilateral posterior crossbite. Materials and Methods: Seventy patients with unilateral posterior crossbite recruited at the Universities of Genova, Siena, and Insubria (Varese) were randomly located into GrE (RME on second deciduous molars) or Gr6 (RME on first permanent molars) and compared. Results: Upper intermolar distance and permanent molar angulation increased significantly in Gr6 vs GrE at T1. Upper intercani

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Pereira, Igor Figueiredo, Fernando Zander Mucci Santiago, Augusto Cesar Sette-Dias, and Vladimir Reimar Augusto de Souza Noronha. "Taking advantage of an unerupted third molar: a case report." Dental Press Journal of Orthodontics 22, no. 4 (2017): 97–101. http://dx.doi.org/10.1590/2177-6709.22.4.097-101.oar.

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ABSTRACT Introduction: Treatments with dental surgery seek to displace tooth to the correct position within the dental arch. Objective: To report a clinical case that took advantage of an unerupted third molar. Case history: A male patient, 18 years of age, was referred by his dentist to evaluate the third molars. The clinical exam revealed no visible lower third molars. The computed tomography (CT) exam showed the presence of a supernumerary tooth in the region of the mandibular ramus, on the left side, and impaction of the third molar, which was causing root resorption on the second molar, t

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Alhaija, Elham S. Abu, and Fedaa T. Wazwaz. "Third molar tooth agenesis and pattern of impaction in patients with palatally displaced canines." Angle Orthodontist 89, no. 1 (2018): 64–70. http://dx.doi.org/10.2319/031318-203.1.

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ABSTRACT Objectives: To investigate the association between third molar agenesis and pattern of impaction, missing teeth, and peg-shaped lateral incisor with palatal canine displacement (PDC). Materials and Methods: The pretreatment orthodontic orthopantomograms of 438 patients (122 males and 316 females) diagnosed with PDC were included. A total of 338 patients with normally erupted canines who had a preexisting radiograph as part of their orthodontic treatment (125 males and 313 females) served as controls. Orthopantomograms were evaluated for missing third molars, third molar eruption statu

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Uribe, Flavio, Nandakumar Janakiraman, Amine N. Fattal, Gian Pietro Schincaglia, and Ravindra Nanda. "Corticotomy-assisted molar protraction with the aid of temporary anchorage device." Angle Orthodontist 83, no. 6 (2013): 1083–92. http://dx.doi.org/10.2319/122612-968.1.

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ABSTRACT This case report describes the interdisciplinary management of a 58-year-old woman who was missing lower first molars and supraerupted maxillary first molars. The treatment plan included intrusion of the upper first molars and corticotomy-assisted mandibular second molar protraction with the aid of temporary anchorage devices. Miniscrews were effective in intrusion of the maxillary first molars and protraction of the lower second molars. Although good functional outcome was achieved in 41 months, the corticotomy-assisted procedure did not significantly reduce the treatment time.

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Nova Delgado, Mónica, Jordi Galbany, and Alejandro Pérez-Pérez. "Morphometric variation of extant platyrrhine molars: taxonomic implications for fossil platyrrhines." PeerJ 4 (May 3, 2016): e1967. http://dx.doi.org/10.7717/peerj.1967.

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The phylogenetic position of many fossil platyrrhines with respect to extant ones is not yet clear. Two main hypotheses have been proposed: thelayeredorsuccessive radiationshypothesis suggests that Patagonian fossils are Middle Miocene stem platyrrhines lacking modern descendants, whereas thelong lineagehypothesis argues for an evolutionary continuity of all fossil platyrrhines with the extant ones. Our geometric morphometric analysis of a 15 landmark-based configuration of platyrrhines’ first and second lower molars suggest that morphological stasis may explain the reduced molar shape variati

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Cucina, Andrea, Elma Vega Lizama, Marco Ramírez, G. Alvarado Cárdenas, and Vera Tiesler. "Morphology of Root and C-Shape Canal in Prehispanic and Modern Maya Groups from Northern Yucatan." Dental Anthropology Journal 21, no. 2-3 (2018): 46–49. http://dx.doi.org/10.26575/daj.v21i2-3.101.

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One-rooted mandibular second molars arelabelled “C-molar” because of the root’s morphology.The frequency of C-molars is strongly associatedwith ethnic origin, being most common in North-EastAsians. The present study analyzed the frequency ofone-rooted molars and associated pulpal chamber in 48Prehispanic Mayans and in 142 modern subjects studiedat the School of Endodontics, UADY. The frequency ofone-rooted molars in the Prehispanic sample is 35%,with 32% of these having C-canals. Similarly, 42 of 142 (30%) modern teeth exhibit a C-canal. The similaritybetween ancient and modern samples suggest

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Selig, Keegan R., Waqqas Khalid, and Mary T. Silcox. "Mammalian molar complexity follows simple, predictable patterns." Proceedings of the National Academy of Sciences 118, no. 1 (2020): e2008850118. http://dx.doi.org/10.1073/pnas.2008850118.

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Identifying developmental explanations for the evolution of complex structures like mammalian molars is fundamental to studying phenotypic variation. Previous study showed that a “morphogenetic gradient” of molar proportions was explained by a balance between inhibiting/activating activity from earlier developing molars, termed the inhibitory cascade model (ICM). Although this model provides an explanation for variation in molar proportions, what remains poorly understood is if molar shape, or specifically complexity (i.e., the number of cusps, crests), can be explained by the same development

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Heliotis, Isabelle, Manpreet Gakhal, and Rosemary Whatling. "Resorption of maxillary first permanent molars by impacted maxillary second premolars: A case series." Dental Update 47, no. 11 (2020): 946–49. http://dx.doi.org/10.12968/denu.2020.47.11.946.

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Although rare, resorption of the first permanent molar caused by impaction of the second premolar does occur. Three paediatric patients with impacted upper second premolars, distinct symptoms and signs of resorption are described. One case with clear resorption of the upper molar on initial presentation was managed immediately with extraction of the first permanent molar. Eruption of the impacted premolars was monitored in the other two cases, but symptom changes and sectional cone beam computed tomography (CBCT) highlighted resorption of the first permanent molars. In both cases the resorbed

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Kuzekanani, Maryam, Laurence J. Walsh, Jahangir Haghani, and Ali Zeynali Kermani. "Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population." International Journal of Dentistry 2017 (2017): 1–4. http://dx.doi.org/10.1155/2017/9364963.

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Purpose. Supernumerary roots in permanent mandibular molar teeth make endodontic treatment more complicated. The aim of this study was to determine the prevalence of Radix Entomolaris (RE) in permanent mandibular first and second molars in the population of Kerman, in the southeast of Iran. Materials and Methods. From a collection of 500 mandibular first and second molar teeth extracted over 2015-2016 at dental clinics in Kerman, teeth were scored for an additional distolingual root, and the average root length and root morphology of this extra root were determined using the De Moor classifica

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Shrestha, R., S. Upadhaya, and M. Bajracharya. "Prevalence of Molar Incisor Hypomineralisation Among School Children in Kavre." Kathmandu University Medical Journal 12, no. 1 (2015): 38–42. http://dx.doi.org/10.3126/kumj.v12i1.13631.

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BackgroundMolar incisor hypomineralisation is defined as the hypomineralisation of systemic origin of one to four permanent first molars, and frequently associated with affected incisors. Till date, there is no data available on molar incisor hypomineralisation in any parts of Nepal.ObjectiveTo determine the prevalence and characteristics of Molar incisor hypomineralisation in 7 to 12 years old school children of Kavre.MethodA total of 749 school children of age 7 to 12 years from four different randomly selected schools with at least one of the first permanent molars fully or partially erupte

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Binnal, Almas, Zeena V. D'Costa, and Junaid Ahmed. "Impacted Third Molars and Its Propensity to stimulate External Root Resorption in Second Molars: Comparison of Orthopantomogram and Cone Beam Computed Tomography." World Journal of Dentistry 8, no. 4 (2017): 281–87. http://dx.doi.org/10.5005/jp-journals-10015-1451.

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ABSTRACT Aim This study was designed to compare the efficiency of conebeam computed tomography (CBCT) with panoramic radiography to discern external root resorption (ERR) in second molars. Materials and methods This was a retrospective study with a sample size of 50 participants who had a total of 120 impacted third molars visible on panoramic radiographs and CBCT images. The presence of ERR on the neighboring second molar was assessed and the position of impacted third molar was determined using Pell and Gregory classification. The ERR was registered according to Al-Khateeb and Bataineh's cri

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