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Journal articles on the topic 'First Premolar'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Oliver, Graham, Heather Nevard, and Mary McKnight. "First premolar ankylosis." Orthodontic Update 13, no. 1 (2020): 25–29. http://dx.doi.org/10.12968/ortu.2020.13.1.25.

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A case is described of a 13-year-old boy who presented with infra-occluded primary molars in three quadrants. Creation of space allowed the second premolars in two quadrants to erupt spontaneously. The first premolar in the remaining quadrant did not erupt spontaneously, failing to reach occlusal contact despite orthodontic traction. CPD/Clinical Relevance: This case demonstrates apparent intermittent ankylosis of a maxillary first premolar.

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Mosharraf, Ramin, and Fatemeh Hajian. "Occlusal Morphology of the Mandibular First and Second Premolars in Iranian Adolescents." Dental Anthropology Journal 17, no. 3 (2018): 94–96. http://dx.doi.org/10.26575/daj.v17i3.153.

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In dental textbooks, the mandibular premolar occlusal morphology has been described as having a predominantly “U-shaped” central groove on the first premolar and a “Y-shaped” central groove on the second premolar. In this study, we examined students (n = 400) of Isfahan high schools (Iran) and first and second premolars were examined bilaterally. Morphological features of the crown, number, height and position of cusps, central grooves shape and sex of the teethwere recorded. For the mandibular first premolars, 21.5% of students exhibited H-shape grooves bilaterally; 70.0% had bilateral U-shap

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Bantawa, Shikha, Deepa Niraula, Sirjana Dahal, et al. "Assessment of root and root canal morphology of mandibular premolars using cone beam computed tomography in a tertiary center of Nepal." Journal of Gandaki Medical College-Nepal 15, no. 2 (2022): 162–67. http://dx.doi.org/10.3126/jgmcn.v15i2.48971.

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Introduction: Mandibular premolars are considered an enigma in dentistry because of their variability in anatomical and morphological features making it difficult to treat endodontically. This study was conducted to determine the root and canal morphology of mandibular premolars in the Nepalese population by using cone beam computed tomography imaging. Methods: One hundred and thirty-four cone beam computed tomography images of the Nepalese population were collected by convenience sampling method from April 1 to August 31, 2022 in Bir Hospital, Kathmandu, Nepal. A total of 536 premolars (268 m

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Boff, L. B., C. E. Da Silveira Bueno, D. G. P. Rocha, et al. "Morphologic evaluation of maxillary premolar canals in a subpopulation from southern Brazil: a cone beam computed tomography study." Endodontics Today 23, no. 2 (2025): 233–40. https://doi.org/10.36377/et-0099.

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AIM. To evaluate the anatomic variations of both maxillary premolars by cone beam computed tomography (CBCT) images. MATERIALS AND METHODS. Data were evaluated from 599 exams (313 women and 286 men), scanned by 300 Maxio CT, Instrumentarium®/Kavo Dental Excellence, FOV 5x5 and voxel 0.085 mm. The images were evaluated by two endodontists using Vertucci’s classification. RESULTS. The prevalence of maxillary premolars with more than one root was higher in men (48.3%) than in women (29.7%) (p < 0.05). A higher percentage of type I and type III canals (53.1% and 20.2%, respectively) was observe

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Sedeeq, Ban, Ali G. Abdullah, and Marwan Saad Azzubaidi. "Radiographic detection of anatomical variations in the mental foramen position in a sample of Salahuddin province population." Italian Journal of Anatomy and Embryology 129, no. 1 (2025): 21–27. https://doi.org/10.36253/ijae-15656.

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The mental foramen (MF) is an important anatomical structure represented as a bilateral opening located on the buccal surface of the mandible, most often situated between the lower first and second premolars. This study was conducted to evaluate the size& position of mental foramen in the Iraqi population of Salahuddin province. A total of 146 OPG radiographs were included according to criteria of: Position 1: Situated anterior (medial) to the first premolar; Position 2: In line with the first premolar; Position 3: Between the first and second premolars; Position 4: In line with the second

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Wadekar, Swati Ishwar, Dipali Yogesh Shah, Jimish Rajiv Shah, and Kinjal Mahesh Gathani. "Endodontic Management of a Three-rooted Mandibular First Premolar associated with Taurodontism." Journal of Operative Dentistry & Endodontics 1, no. 2 (2016): 90–92. http://dx.doi.org/10.5005/jp-journals-10047-0019.

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ABSTRACT Introduction Taurodontism is a morpho-anatomic variation in tooth anatomy that rarely affects mandibular premolars. Literature is replete with mandibular first premolars presenting atypical additional root canals, but concurrent presence of three roots and taurodontism is exceptional. Materials and methods This case report describes the successful endodontic diagnosis and management of a rare case of taurodontism in a mandibular first premolar with chronic apical periodontitis. Cone beam computed tomography (CBCT) facilitated the diagnosis of three roots and root canals associated wit

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Celikoglu, Mevlut, Hasan Kamak, Ismail Akkas, and Hüsamettin Oktay. "Effects of orthodontic treatment and premolar extractions on the mandibular third molars." Australasian Orthodontic Journal 26, no. 2 (2010): 160–64. http://dx.doi.org/10.2478/aoj-2010-0026.

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Abstract Background The space available for an unerupted mandibular third may depend on the choice of premolar extracted. Aims To investigate the effects of orthodontic treatment and premolar extractions on the inclinations of the mandibular third molars and the space available for their eruption, and to compare these changes with a nonextraction group. Methods The pre- and post-treatment panoramic radiographs of 54 subjects (20 males, 34 females) were used. Eighteen of these subjects had the four first premolars extracted, 16 subjects had four second premolars extracted and 20 subjects were t

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Dawasaz, Ali Azhar, Syed Sadatullah, and Syed Kamran Bokhari. "Fused Double Supernumerary Premolars of the Mandible: A Rare Case." Case Reports in Dentistry 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/734670.

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The incidence of nonsyndromic supernumerary premolars is rare. Supernumerary premolars are likely to undergo pathological changes. The most commonly encountered complications with these teeth are dentigerous cyst and root resorption of the adjacent tooth. This paper is about impacted double fused supernumerary premolars in the right mandiblular body associated with an impacted first premolar in a 17-year-old male. Under local anesthesia, the supernumerary premolars and the impacted permanent first premolar were surgically removed. Early diagnosis followed by an appropriate treatment at the rig

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Wadood, Sundas, Muhammad Saood, Aiman Mehmood Shah, Mahnoor Alam, Sara Shujaat, and Tahira Asghar. "COMPARISON OF OVERALL AND POSTERIOR BOLTON RATIOS OF SKELETAL CLASS II MALOCCLUSION BEFORE AND AFTER DIFFERENT COMBINATIONS OF FOUR PREMOLAR EXTRACTIONS IN A PAKISTANI POPULATION." Journal of Khyber College of Dentistry 13, no. 04 (2023): 2–7. http://dx.doi.org/10.33279/jkcd.v13i04.621.

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Objectives: To fi nd whether diff erent premolar extraction patterns change the overall Bolton ratio from 91.30%, and the posterior Bolton ratio from 105.27% among the Pakistani population in a skeletal class II malocclusion.Materials and Methods: This Quasi Experimental study was conducted at at the Orthodontics Department of Khyber College of Dentistry, Peshawar on 30 dental models of skeletal class II patients. A Digital Vernier Caliper was used to measure the mesiodistal widths of the teeth me-sial to the second molar. Overall and posterior Bolton ratios were calculated before and after hy

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Patel, Suhag, Sunita Garg, Sumit Sabharwal, Neetika Jain, Shadabul Islam, and Vineet Kumar Pandey. "Study of root canal morphology of mandibular premolars in an indian population." Journal of Research in Dentistry 3, no. 5 (2016): 814. http://dx.doi.org/10.19177/jrd.v3e52015814-822.

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AIM: The purpose of this study was to describe the external and internal anatomy of the mandibular premolars. MATERIAL AND METHODS: 100 extracted human permanent mandibular first and second premolars teeth were collected. The length of the tooth from the cusp tip to root apex was measured with the help of Vernier calliper. In case of curved roots, ligature wire was adapted to the root and then straightened and measured. Each tooth was examined for the number of roots, curvature of root, presence of root canal invagination. India ink was injected into the pulp chamber through the access opening

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Darak, Devashree, Deebah Choudhary, Nimisha Shah, Renu Batra, Vinaya Pisal, and Chandni Shah. "A Cone-Beam Computed Tomographic Study to Evaluate Variations in Root Canal Morphology of Mandibular Premolars and Its Relation to Mental Foramen in an Indian Sub-Population." Journal of Advances in Medicine and Medical Research 36, no. 9 (2024): 276–82. http://dx.doi.org/10.9734/jammr/2024/v36i95575.

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Aim: Using cone beam computed tomography, the study intends to assess changes in mandibular premolar root canal shape and its link to the mental foramen in the Central Gujarat population. Study Design: This is a retrospective, cross-sectional analysis. Place and Duration of Study: Between September 2021 and December 2022 the was conducted at the K M Shah Dental College in Vadodara, Gujarat, India, in combination with CBCT facilities in the Central Gujarat area. Methodology:250 CBCT scans of medium and large FOV were obtained with approval from the institutional ethics committee. The images wer

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Taluja, Chirag, Nimisha Shah, and Hardik Joshi. "Root Canal Morphology and Variations of Mandibular Premolars by Clearing Technique: An in vitro Study." Journal of Contemporary Dental Practice 12, no. 4 (2011): 318–21. http://dx.doi.org/10.5005/jp-journals-10024-1052.

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ABSTRACT Background and objectives The aim of this study was to compare internal anatomy between first and second mandibular premolars and to study different percentage variations of root canal morphology of mandibular premolars in Gujarat population based on Vertucci's classification by clearing technique. Methodology A total of 80 extracted intact permanent mandibular premolars (40 each mandibular first premolar and mandibular second premolar) with fully formed apices were collected. Access cavity was prepared with endo access kit, all samples were placed in 2.5% sodium hypochlorite for 48 h

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Bulut, Duygu Goller, Emre Kose, Gozde Ozcan, Ahmet Ercan Sekerci, Emin Murat Canger, and Yıldıray Sisman. "Evaluation of root morphology and root canal configuration of premolars in the Turkish individuals using cone beam computed tomography." European Journal of Dentistry 09, no. 04 (2015): 551–57. http://dx.doi.org/10.4103/1305-7456.172624.

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ABSTRACT Objective: The aim of the present study is to assess the root and root canal morphology of maxillary and mandibular premolars in a Turkish population by using cone beam computed tomography (CBCT). Materials and Methods: In this study, CBCT images of 2134 premolars (987 maxillary, 1147 mandibular) were obtained from 404 patients. Details of gender, age, number of roots and canals, and canal configuration in each root were recorded. The canal configuration was classified and evaluated according to Vertucci's criteria. Results: The majority of maxillary premolars had two separate roots;

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Kumar, Kumar. "Frequency of premolar teeth extractions for orthodontic treatment." Bioinformation 16, no. 12 (2020): 1080–87. http://dx.doi.org/10.6026/973206300161080.

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It is of interest to evaluate the frequency of premolar extractions during orthodontic treatment in patients reporting to the Saveetha dental hospital in Chennai from 2019-2020. We used the records from 987 patients who underwent orthodontic treatment from June 2019 to March 2020 in a dental hospital for this analysis. Digital case records of patients who underwent therapeutic extractions of premolars were isolated. A sample dataset of 340 case records were selected for this study. Data shows that 34.4% of subjects underwent premolar extractions amongst a total of 987 subjects who underwent or

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Kumar, Kumar. "Frequency of premolar teeth extractions for orthodontic treatment." Bioinformation 16, no. 12 (2020): 1080–87. http://dx.doi.org/10.6026/973206300161080.

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It is of interest to evaluate the frequency of premolar extractions during orthodontic treatment in patients reporting to the Saveetha dental hospital in Chennai from 2019-2020. We used the records from 987 patients who underwent orthodontic treatment from June 2019 to March 2020 in a dental hospital for this analysis. Digital case records of patients who underwent therapeutic extractions of premolars were isolated. A sample dataset of 340 case records were selected for this study. Data shows that 34.4% of subjects underwent premolar extractions amongst a total of 987 subjects who underwent or

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Islam, Mohammad Aminul, Tasnim Wakia, and Md Shamsul Alam. "Root Canal Morphology of Mandibular First Premolars of Bangladeshi Population." Update Dental College Journal 2, no. 2 (2013): 3–7. http://dx.doi.org/10.3329/updcj.v2i2.15481.

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Background: The presence of a single root canal in mandibular first premolar cannot be assumed always. The variability in canal morpholohy of root canal includes the number & shape of the canal as well as pathways of the canals. Methods: In this study, 100 mandibular first premolar teeth were evaluated by clearing technique. Collected teeth were cleaned and merged with 5.25% NaOCl for 48 hours. Then the teeth were decalcified with 5% nitric acid for 72 hours followed by dehydrated sequentially with 80-100% alcohol. After dehydration, Indian Ink was injected into the canal through the previ

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Capelozza Filho, Leopoldino, Mauriciode Almeida Cardoso, Tien Li An, and Francisco Antonio Bertoz. "Maxillary Canine—First Premolar Transposition." Angle Orthodontist 77, no. 1 (2007): 167–75. http://dx.doi.org/10.2319/012906-32r.1.

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Abstract Tooth transpositions present at a relatively low incidence in the world population and primarily affect maxillary canines and premolars. Treatment of this disturbance should take into account aspects such as facial pattern, age, malocclusion, tooth-size discrepancy, stage of eruption, and magnitude of the transposition. Mechanics for correction should be entirely individualized, reducing the risks and adverse effects. Practitioners often select simpler options, indicating extraction of permanent teeth, which is an irreversible procedure that may bring about damages to the patient. Thi

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Khanal, Pranaya, Bikash Chaudhary, and Rajesh Twayana. "Study of the antero-posterior position of the mental foramen in the Nepalese population using digital Panoramic Radiograph." Journal of Kathmandu Medical College 8, no. 4 (2020): 183–86. http://dx.doi.org/10.3126/jkmc.v8i4.32382.

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Background: Mental foramen is an important landmark to be considered when operating in the anterior mandible. It is mandatory to identify the location of the foramen to prevent injury to mental nerve and subsequent paresthesia. Objectives: The objective of this study was to identify the position of the mental foramen in relation to the mandibular premolars and first molar in patients visiting Kathmandu Medical College, Department of Oral Surgery, Duwakot using the Orthopantomogram. Methodology: A total of 200 digital panoramic radiographs of 92 males and 108 females in the age rang

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Li, Weiran, and Jiuxiang Lin. "Dental Arch Width Stability after Quadhelix and Edgewise Treatment in Complete Unilateral Cleft Lip and Palate." Angle Orthodontist 77, no. 6 (2007): 1067–72. http://dx.doi.org/10.2319/070506-272.1.

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Abstract Objective: To evaluate the transverse stability of the dental arch in unilateral cleft lip and palate (UCLP) patients after orthodontic treatment with quadhelix and edgewise appliances. Materials and Methods: Twenty repaired complete UCLP patients with posterior crossbites were chosen as the study subjects. All had ceased retention at least 15 months previously. Measurements were carried out directly on the pretreatment, posttreatment, and postretention study models using a three-dimensional dental cast analyzer. The interdental widths were measured for the canines, first premolars, s

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Popovic, Milica, Milos Papic, Aleksandar Acovic, Suzana Zivanovic, and Tatjana Kanjevac. "Cone-beam computed tomography study of root number and root canal configuration of premolars in Serbian population." Medical review 71, no. 3-4 (2018): 100–107. http://dx.doi.org/10.2298/mpns1804100p.

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Introduction. The aim of this study was to establish the number of roots and present the root canal configuration in the maxillary and mandibular premolar teeth, and evaluate the relations among these characteristics with gender and teeth position in the Serbian population using cone-beam computed tomography. Material and Methods. Cone-beam computed tomography images of 570 teeth of 150 patients were evaluated. Teeth were classified into the following groups: maxillary first premolars, maxillary second premolars, mandibular first premolars and mandibular second premolars, and the number of roo

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Jaswal, Amit Singh, Shylaja Attur, Avani Patel, Niharika Sarathy, Aastha Visavadiya, and Norin Patel. "Odontometric study of premolars - A convenient method for gender determination." Indian Journal of Forensic Medicine & Toxicology 19, no. 3 (2025): 69–74. https://doi.org/10.37506/aayxgc81.

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Introduction-Determining the sex of an individual is indeed a crucial step in forensic medicine, as it provides valuable information for various investigative and identification purposes. Teeth are decent source for gender determination. Odontometrics offers a benefit of being simple, speedy, and low cost. Aim- To verify the premolar odontometric differences in sex determination. Methodology- Mesiodistal and buccolingual measurements of premolar crown were calibrated for males and females on 50 pairs of plaster models (25 pairs from both sex) from age group 20-40 years. First and second premol

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Darban Hosseini, Sanam, Mojgan Kachoei, Masoumeh Faramarzi, and Mahdiyeh Esmaeilzadeh. "Comparison of radiographic changes in the alveolar crest after extraction of fully and partially erupted premolars during orthodontic treatment: A retrospective analytical study." Journal of Dental Research, Dental Clinics, Dental Prospects 15, no. 4 (2021): 279–84. http://dx.doi.org/10.34172/joddd.2021.046.

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Background. The alveolar process plays an essential role in providing dental support and gradually disappears with tooth loss. Space deficiency can cause one premolar to remain semi-erupted adjacent to a fully-erupted premolar. During orthodontic treatment, each of these premolars can be extracted. This retrospective study aimed to compare radiographic changes of the alveolar crest due to orthodontic movements of fully-erupted and semi-erupted premolars into the extraction sites before and after treatment. Methods. The patients were divided into the fully-erupted premolar extraction (first) gr

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Rajakeerthi, Rajamohan, and Malli Suresh Babu Nivedhitha. "Use of Cone Beam Computed Tomography to Identify the Morphology of Maxillary and Mandibular Premolars in Chennai Population." Brazilian Dental Science 22, no. 1 (2019): Process. http://dx.doi.org/10.14295/bds.2019.v22i1.1673.

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Objective: The complex root canal anatomy is inherently colonised by microbial flora. Endodontic treatment success is always related to adequate disinfection of the root canal space, which ultimately affects the treatment outcome. A thorough understanding of the external and internal root canal anatomy by using adequately imaging modalities is essential before planning any treatment. The aim of this study was to investigate the number and morphology of the root canals of maxillary and mandibular premolars in Chennai population. Material and Methods: Full-size cone-beam computed tomographic ima

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Petrovski, Mihajlo, Svetlana Jovevska, and Olivera Terzieva-Petrovska. "POSITION OF THE MENTAL FORAMEN IN CORELATION WITH THE LOWER PREMOLARS: A PANORAMIC RADIOGRAPHIC STUDY." Teacher of the future 31, no. 4 (2019): 889–93. http://dx.doi.org/10.35120/kij3104889p.

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Background: Evaluation of the position of foramen mentale has great significance and it is very important aids in endodontic, oral-surgical, periodontal interventions, as well as diagnostic procedures. Thus, in view of this, the present study was conducted among the population in North Macedonia, to determine the most common location of the mental foramen and to estimate difference in position of foramen mentale in correlation with the second lower premolar teeth. The mental foramen is an opening located on the external surface of the mandible in the region of the mandibular premolars. Radiogr

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Xing, Xiujin, Hanglin Qin, Jing Sun, and Kun Li. "Asymmetric Extraction Treatment in a Middle-Aged Patient with Dental Crowding and Protrusion using Clear Aligners." Case Reports in Dentistry 2023 (August 30, 2023): 1–13. http://dx.doi.org/10.1155/2023/8836409.

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Frequently, orthodontic treatment involves symmetrically extracting premolars to correct severe crowding or protrusion. Nevertheless, in some cases, a more reasonable alternative may be to remove teeth with poor prognoses to improve protrusion and relieve crowding. A middle-aged woman sought treatment for dental protrusion and crowding. Her mandibular right first molar had been treated with root canal therapy due to pulpitis, but she still felt uncomfortable. In addition, her maxillary left second premolar had become carious. Extractions of the maxillary right first premolar and left second pr

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Chudnovsky, Ana Waisbord de. "Lower first premolar extraction." American Journal of Orthodontics and Dentofacial Orthopedics 92, no. 3 (1987): 262–63. http://dx.doi.org/10.1016/0889-5406(87)90425-2.

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Rameswaran, Kirthiga, Aminah Mohd Shariff, and Daniel Lim. "Risk Associated with Immediate Implant at Mandibular Canine and Premolars: A Cone Beam Computed Tomography (CBCT) Study." Sains Malaysiana 50, no. 4 (2021): 1047–56. http://dx.doi.org/10.17576/jsm-2021-5004-15.

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With the evolution of implant dentistry, immediate implantation remains a challenge especially in achieving a good primary stability with avoidance of complications such as nerve injuries and lingual perforations. This study was aimed to determine the risks of nerve injury and lingual perforation following virtual implant placement at mandibular canines, mandibular first premolars and mandibular second premolars using cone beam computed tomography (CBCT) scans. From the total of 771 CBCT scans screened, 100 CBCT scans were included. Measurements were made based on the cross-section of the stud

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Aldesoki, Mostafa, and Khaled El-Sayed El-Haddad. "GEOMETRIC ANALYSIS OF THE MANDIBULAR FIRST PREMOLAR AND CORRELATION WITH ITS FUNCTIONS USING FINITE ELEMENT METHOD." International Journal of Advanced Research 12, no. 04 (2024): 358–67. http://dx.doi.org/10.21474/ijar01/18560.

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Introduction: The geometric analysis is of important value for exploring the functional adaptation of the human teeth. The mandibular first premolar is one of the permanent teeth that has unique geometric features to properly perform its functions. Purpose: To assess the geometric features of the mandibular first premolar functional and the stress analysis of the static occlusal forces using finite element method. Materials & Methods: Ten human extracted mandibular first premolars were photographed from different aspects to analyze the geometric morphology of the premolars. Dimensional mea

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Suga, Selma Sano, Paula de Castro Kruly, Talissa Mayer Garrido, Marise Sano Suga Matumoto, Uhana Seifert Guimarães Suga, and Raquel Sano Suga Terada. "Radiographic Follow-Up during Orthodontic Treatment for Early Diagnosis of Sequential Supernumerary Teeth." Case Reports in Dentistry 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/3067106.

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Most supernumerary teeth are impacted and asymptomatic.Objective.The aim of this paper is to describe two cases of sequential development of supernumerary teeth in the mandibular premolar region, identified during orthodontic treatment.Reports.The first case describes the radiographic follow-up of a female patient that presented a supernumerary tooth at the age of 9 years and 10 months in the right mandibular premolar region, followed by a further supernumerary tooth in the left mandibular premolar region identified at the age of 11 years and 3 months. In the second case, the radiographic foll

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Babarasul, Dlsoz, Ranjdar Talabani, Kazhan Abdalrahman, and Shawbo Ahmad. "Evaluation of Root Canal Morphology in Mandibular Premolars in an Iraqi Subpopulation Using Cone-beam Computed Tomography (Retrospective study)." Sulaimani Dental Journal 11, no. 2 (2024): 18–26. https://doi.org/10.17656/sdj.10189.

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Objective: The effectiveness of root canal therapy relies on a thorough study of root canal anatomy, with mandibular premolars exhibiting a notable degree of diversity in this regard. The objective of this research was to utilize cone-beam computed tomography in order to determine the prevalence of mandibular premolar root canal configuration within a specific subpopulation in Iraq. Methods: Using cone-beam computed tomography scans, 404 mandibular premolars from 101 patients were evaluated retrospectively. The Vertucci classification and its subsequent modifications were employed to document

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Yusuf, Muslim, Nurhayati Harahap, and Dhita Kartika Nasution. "Perubahan harmoni wajah pasca perawatan kelas II skeletal dengan pencabutan dua premolar satu atas menurut analisis Arnett dan BergmanChanges in facial harmony after skeletal class II treatment with extraction of two maxillary first premolars based on Arnett and Bergman analysis." Padjadjaran Journal of Dental Researchers and Students 5, no. 1 (2021): 43. http://dx.doi.org/10.24198/pjdrs.v5i1.28263.

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Pendahuluan: Arnett dan Bergman (1999) membuktikan bahwa perawatan ortodonti, analisis jaringan lunak wajah, diagnosis dan rencana perawatan memiliki parameter nilai harmoni sebagai kunci penetapan estetika wajah. Perawatan maloklusi klas II skeletal disertai proganotisme maksilaris umumnya dilakukan dengan pencabutan dua premolar satu atas untuk mengkoreksi profil wajah pasien. Tujuan penelitian untuk menganalisis perubahan nilai harmoni wajah pasca perawatan maloklusi kelas II dengan pencabutan premolar satu atas menurut analisa Arnett dan Bergman. Metode: Jenis penelitian analitik observasi

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Pacher, Martina. "Anterior premolar variability in Pleistocene cave and brown bears and its significance in species determination." Fossil Imprint 73, no. 3-4 (2017): 482–94. http://dx.doi.org/10.2478/if-2017-0025.

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The current study deals with the anterior premolar pattern in the cave and brown bear lineage, and its significance in species determination. The occurrence of single premolars and its combinations in skulls and mandibles is recorded for various chronological and regional groups. Both lineages stay more “conservative” in the upper than in the lower dentition, but show contrasting reduction tendencies. Brown bears tend to retain the first premolar, while in the cave bear lineage, third premolars prevail. Exclusively diagnostic for brown bears is the occurrence of a single P1, as well as a compl

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Hakiem Tawfieq, Ali. "Detection of Vital Anatomical Landmarks in Lower Posterior Premolars and First Molar Area (BuccallyPositioned)During Different Surgical Intervention Using Cone Beam Ct Scan." Diyala Journal of Medicine 24, no. 1 (2023): 117–26. http://dx.doi.org/10.26505/djm.24017071106.

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Background: The mental foramen (MF) is a very important structure; to avoid any trauma to mental nerve may be occur and in order to avoid that, its position, variation in anatomy and shapes should be clearly determined before any surgical procedure. Objective: To detect the exact position of MF and thickness of cortical plates in lower premolars and first molars among the Iraqi resident. Patients and Methods: For this prospective study, a total of 92 Iraqi adults patients (51 females, 41 males; age range 18-69 years). From October 2020 to February 2021, patients aged range from 25 to 65 years

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Bittegeko, SB, J. Arnbjerg, R. Nkya, and A. Tevik. "Multiple dental developmental abnormalities following canine distemper infection." Journal of the American Animal Hospital Association 31, no. 1 (1995): 42–45. http://dx.doi.org/10.5326/15473317-31-1-42.

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Multiple dental developmental abnormalities (e.g., dental impaction, partial eruption, oligodontia, enamel hypoplasia, and dentin hypoplasia) in a 10-month-old, female, Tanzanian tropical mixed-breed puppy are reported. Various permanent teeth were involved. These included impacted mandibular canine and first and third premolar teeth; a partially erupted maxillary canine tooth; oligodontia of a mandibular fourth premolar tooth; enamel hypoplasia of the maxillary and mandibular canine teeth, incisors, and premolars; and dentin hypoplasia of the maxillary incisors, maxillary premolars, and mandi

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Lie Ken Jie, Ronny K. P. "Treating Bimaxillary Protrusion and Crowding with the Invisalign G6 First Premolar Extraction Solution and Invisalign Aligners." APOS Trends in Orthodontics 8 (December 1, 2018): 219–24. http://dx.doi.org/10.4103/apos.apos_67_18.

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In cases requiring extraction of four first premolars, ensuring maintenance of adequate posterior anchorage and proper inclination of the teeth adjacent to the extraction sites during space closure can be difficult. The Invisalign G6 first premolar extraction solution has been developed to specifically address these problems. This case report describes the treatment of a 30-year-old woman whose main concerns were related to her protrusive and malaligned anterior teeth. Clinical findings revealed, among others, bimaxillary anterior protrusion and moderate-to-severe anterior crowding. A treatmen

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Shreya, Dharni1, Joy Sinha2 Dakshita, Rashmeet3, and Tyagi4 Tushar. "Mandibular Premolars With Concealed Canals Demand Caution: A Case Report." Heal Talk - A Journal of Clinical Dentitsry 16, no. 04 (2024): 3. https://doi.org/10.5281/zenodo.11000770.

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The main causes of endodontic failure are incomplete obturation, insufficient instrumentation in the canal, and distinctions in the anatomy of the canal. Mandibular premolars have complex architecture, which makes endodontic treatment quite challenging. The present case report shows a rare occurrence of the extra canal in the first premolar in which endodontic treatment was performed intentionally to replace the missing 35.    The present case contributes an important perspective to the reservoir of knowledge concerning distinct canal configurations in lower premolars.

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Ko, Jeong-Min, Cheol-Ho Paik, Simon Choi, and Seung-Hak Baek. "A patient with protrusion and multiple missing teeth treated with autotransplantation and space closure." Angle Orthodontist 84, no. 3 (2013): 561–67. http://dx.doi.org/10.2319/070813-498.1.

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ABSTRACT Objective: To present a patient treated with submerging autotransplantation (SA) of an immature premolar and subsequent orthodontic space closure (OSC) and to report a 10-year follow-up result. Case and Method: A 10-year-old boy had multiple missing premolars with an asymmetric pattern (maxillary right first and second premolars, teeth 14 and 15; maxillary left second premolar, tooth 25; and mandibular right second premolar, tooth 45). After considering several treatment options, tooth 35 with immature root development underwent SA into the missing site of tooth 15 at a depth 5 mm bel

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Antony, Vincy, Archana Mohan Kumar, Muhamed Shaloob, Prathapan Parayaruthottam, Muhammed Raheesh, and Shahanamol VP. "Assessment of mini-aesthetics in Class I malocclusion subjects who underwent orthodontic treatment with or without extraction of four premolars – A prospective study." Journal of Contemporary Orthodontics 8, no. 3 (2024): 348–53. http://dx.doi.org/10.18231/j.jco.2024.051.

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Smile and facial attractiveness are strongly correlatedThis study aimed to assess the effect of extraction or non-extraction orthodontic treatment on mini-aesthetics in patients with Class I malocclusion by measurement of the smile variables.A total of 56 subjects were selected and grouped as Group 1- treated non-extraction, Group 2A-treated with extraction of first premolars and groups 2B- treated with extraction of second premolar teeth. Each subject was photographed with a posed smile and NHP using DSLR camera. The images were then imported into a computer software and the following smile p

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Anushka Yadav, B R Adyanthaya, Somendra Sarshwat, and Om Prakash Yadav. "Aberrant Pathway from Frustration to Fascination: Mandibular Second Premolar with Three Root Canals: A Case Report." International Healthcare Research Journal 1, no. 12 (2018): 373–76. http://dx.doi.org/10.26440/ihrj/01_12/151.

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Human mandibular premolars gained popularity as they have complex root and root canal morphology. Multiple roots and canals are more common in mandibular first premolars when compared to mandibular second premolars. The occurrence of three root canals and separate foramina in mandibular second premolars is not common. In this case report, endodontic management of a three-rooted mandibular second premolar is discussed.

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Pamadya, Sandy, Mirza Aryanto, Nurani Hayati, and Johannes Dhartono. "Evaluasi jumlah saluran akar gigi premolar pertama atas menggunakan teknik radiografi periapikal pararel dan Cone Beam Computed Tomography." Jurnal Radiologi Dentomaksilofasial Indonesia (JRDI) 5, no. 1 (2021): 7. http://dx.doi.org/10.32793/jrdi.v5i1.671.

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Objectives: Maxillary and mandibular first premolars are amongst the teeth that has a risk to caries and needed to be treated. These teeth were varied in term of root and root canal amount. A successful root canal treatment in premolar teeth is highly dependent on the identification of the number and shape of root canals according to Vertucci. Radiographs are still the main choice in helping dentists establish an adequate diagnosis and treatment plan for root canal treatment. Conventional radiographs produce two-dimensional images which often cause difficulties in interpreting the resulting ra

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Muhsen, Dr Salah J. "Horizontal and Vertical Position of the Mental Foramen on Panoramic Views of a Selected Iraqi Population." Mustansiria Dental Journal 8, no. 2 (2018): 188–92. http://dx.doi.org/10.32828/mdj.v8i2.325.

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The mental foramen is the opening of the short mental canal, through which themental nerve the terminal branch of the inferior alveolar nerve exits, knowing theexact position of the mental foramen is essential in oral surgical procedures. Thisstudy determines this position in a selected Iraqi population.240 panoramic radiographs of Iraqi population selected from three different oraland maxillofacial centers to identify the normal range of position of the mentalforamen, both horizontal and vertical position were studied, radiographs with anyerrors or taken for patients not co inside with our cr

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Arora, Dr Vipin, Dr Parul Bansal, Dr Ayush Goyal, Dr Pooja Arora, and Dr Karan Bansal. "Three rooted maxillary first premolar- a case report." Scholars Journal of Dental Sciences 3, no. 6 (2016): 188–90. http://dx.doi.org/10.21276/sjds.2016.3.6.8.

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Hakiem Tawfieq, Ali. "Detection of Vital Anatomical Landmarks in Lower Posterior Premolars and First Molar Area (BuccallyPositioned)During Different Surgical Intervention Using Cone Beam Ct Scan." Diyala Journal of Medicine 24, no. 1 (2023): 117–26. http://dx.doi.org/10.26505/djm.v24i1.977.

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Background: The mental foramen (MF) is a very important structure; to avoid any trauma to mental nerve may be occur and in order to avoid that, its position, variation in anatomy and shapes should be clearly determined before any surgical procedure. Objective: To detect the exact position of MF and thickness of cortical plates in lower premolars and first molars among the Iraqi resident. Patients and Methods: For this prospective study, a total of 92 Iraqi adults patients (51 females, 41 males; age range 18-69 years). From October 2020 to February 2021, patients aged range from 25

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Anindita, Pritartha. "Penggunaan Labial bow Sebagai Komponen Aktif pada Pencabutan Premolar Pertama (Kajian pada Typodont)." e-GiGi 11, no. 2 (2023): 313–17. http://dx.doi.org/10.35790/eg.v11i2.47646.

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Abstract: To date, removable appliances have begun to be abandoned since they are considered ineffective compared to fixed appliances. Labial bow is one of the retentive components of removable orthodontic appliances that can be used as an active component or can be activated. The active labial bow can push the teeth in palatal and lingual directions; therefore, it can be used to correct simple malocclusion problems or to cover spaces that occur due to tooth extractions. This study aimed to determine the description of labial bow use as an active component in the case of extraction of the mand

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Fourneau, Eléonore, and Raphael Olszewski. "Taurodontic teeth in cone beam computed tomography: pictorial review." NEMESIS Negative effects in medical science: oral and maxillofacial surgery 33, no. 1 (2023): 1–44. http://dx.doi.org/10.14428/nemesis.v33i1.81953.

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Objective: Taurodontism is a developmental disorder with enlargement of the body of the tooth and lack of cervical constriction, which results in a large pulp chamber and small roots with the apical displacement of furcation. Taurodontism exists in deciduous, and definitive unilateral, and bilateral teeth. We found that taurodontism was also described in 67 syndromes. We proposed a review of the open access literature on taurodontism, a new clinical classification of taurodontic teeth with illustrations from free open access literature, and from our case serie of 15 patients. Material an

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Jain, Suruchi, and Ashima Valiathan. "Influence of First Premolar Extraction on Mandibular Third Molar Angulation." Angle Orthodontist 79, no. 6 (2009): 1143–48. http://dx.doi.org/10.2319/100708-525r.1.

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Abstract Objective: To compare the angular changes in the developing mandibular third molars in both first premolar extraction and nonextraction cases and to determine whether premolar extraction results in a more mesial movement of the mandibular buccal segment and causes favorable rotational changes in the mandibular third molar tilt, which can enhance later eruption of the third molars. Materials and Methods: Pretreatment (T1) and posttreatment (T2) panoramic radiographs were taken of 25 subjects who had been treated by the extraction of all the first premolars and 25 subjects who had been

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Karobari, Mohmed Isaqali, Ali A. Assiry, Galvin Sim Siang Lin, et al. "Roots and Root Canals Characterization of Permanent Mandibular Premolars Analyzed Using the Cone Beam and Micro Computed Tomography—A Systematic Review and Metanalysis." Journal of Clinical Medicine 12, no. 6 (2023): 2183. http://dx.doi.org/10.3390/jcm12062183.

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This current paper aims to review the literature on the root canal configuration (RCC) and root structure of permanent mandibular premolars. To find the published scientific literature on the RCC of mandibular premolars up to July 2022, a systematic search of four electronic databases was performed. The studies were selected, rendering to a predetermined point of reference: “mandibular 2nd premolar”, “root and canal system”, “morphology of root and canal”, “root and canal configuration”, and “morphology”, along with “anatomy” and “mandibular premolars”. Cross-referencing along with screening t

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Prasad, Ashwini B., Deepak Raisingani, Charu Thanvi, Akansha Jharwal, Pooja Sen, and Shaleen Sogani. "Endodontic Management of Mandibular First Premolar with Type IV Root Canal: A Case Report." Journal of Mahatma Gandhi University of Medical Sciences and Technology 5, no. 1 (2020): 26–30. http://dx.doi.org/10.5005/jp-journals-10057-0120.

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ABSTRACT Thorough knowledge of the root canal morphology, appropriate assessment of the pulp chamber floor, and critical interpretation of radiographs are foundation for successful root canal therapy. Mandibular premolars have earned the reputation for having an aberrant anatomy, making them one of the most difficult teeth to manage endodontically. Therefore, clinician should be aware of the configuration of the pulp system as the incidence of having two roots in these teeth is quite rare. These two case reports present the clinical management of mandibular first premolar having two roots bifu

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Araújo, Telma Martins de, and Luciana Duarte Caldas. "Tooth extractions in Orthodontics: first or second premolars?" Dental Press Journal of Orthodontics 24, no. 3 (2019): 88–98. http://dx.doi.org/10.1590/2177-6709.24.3.088-098.bbo.

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ABSTRACT Tooth crowding and protrusions demand rigorous attention during orthodontic planning that includes the extraction of first and second premolars. Some characteristics, such as dentoalveolar bone discrepancies, maxillomandibular relations, facial profile, skeletal maturation, dental asymmetries and patient cooperation, are important elements of an orthodontic diagnosis. This study discusses the options of treatments with extractions and describes the correction of a Class I malocclusion, bimaxillary protrusion, severe anterior crowding in both dental arches and tooth-size discrepancy, u

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Khattak, Munawar Aziz, Sana Arbab, and Syed Amjad Shah. "Frequency of number of roots and root canals of maxillary first premolar teeth." Professional Medical Journal 28, no. 10 (2021): 1513–18. http://dx.doi.org/10.29309/tpmj/2021.28.10.6290.

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Objective: To determine the frequency of the number of roots and root canals in a sample of 250 extracted maxillary first premolar teeth of patients visiting Peshawar Dental College and Hospital Khyber Pakhtunkhwa. Study Design: Cross Sectional. Setting: Department of Oral Biology, Peshawar Dental College and Hospital Khyber Pakhtunkhwa. Period: April 2016 to December 2016. Material & Methods: A total of 250 extracted human maxillary first premolars were collected from the Department of Oral & Maxillofacial Surgery, Peshawar Dental College, and Hospital Khyber Pakhtunkhwa. All teeth we

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