Academic literature on the topic 'Maxillary first molar'
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Journal articles on the topic "Maxillary first molar"
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Karlsson, Ingela, and Lars Bondemark. "Intraoral Maxillary Molar Distalization." Angle Orthodontist 76, no. 6 (November 1, 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. Patients in the MD 1 group were without any erupted second molars during the distalization period, whereas in the MD 2 group both the first and second molars were in occlusion at start of treatment. The main outcome measures to be assessed were: treatment time, ie, time in months to achieve a normal molar relation, distal movement of maxillary first molars, and anterior movement of maxillary incisors (anchorage loss). The mean age in the MD 1 group was 11.4 years; in the MD 2 group, 14.6 years. Results: The amount of distal movement of the first molars was significantly greater (P < .01) and the anchorage loss was significantly lower (P < .01) in the group with no second molars erupted. The molar distalization time was also significantly shorter (P < .001) in this group, and thus the movement rate was two times higher. Conclusions: It is more effective to distalize the first maxillary molars before the second molars have erupted.
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Dr Radhika N B, Dr Radhika N. B., Dr Krishna Nayak, and Dr KU Cariappa Dr KU Cariappa. "Maxillary Third Molar Eruption and its Relationship to Inclination of Maxillary First Molars - a Computed Tomography Study." International Journal of Scientific Research 2, no. 12 (June 1, 2012): 18–20. http://dx.doi.org/10.15373/22778179/nov2013/182.
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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 (December 2, 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 first permanent molars required extraction. Frequent clinical and radiographic assessment is imperative in such cases, along with consideration for the use of CBCT. CPD/Clinical Relevance: Many dental health professionals are unaware that resorption of maxillary molars induced by impacted premolars is possible, thus, this phenomenon is not monitored, resulting in misdiagnosis and avoidable patient morbidity.
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Hu, Kyung-Seok, Min-Kyu Kang, Tae-Won Kim, Kyung-Ho Kim, and Hee-Jin Kim. "Relationships between Dental Roots and Surrounding Tissues for Orthodontic Miniscrew Installation." Angle Orthodontist 79, no. 1 (January 1, 2009): 37–45. http://dx.doi.org/10.2319/083107-405.1.
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Abstract Objective: To elucidate relationships between the dental roots and surrounding tissues in order to prevent complications after placement of a miniscrew. Materials and Methods: Twenty human mandibles and maxillas were used for this study. In the 200 sections of each mandible and maxilla, nine items were measured to investigate the relationships between the dental roots. Results: The interroot distance increased from anterior to posterior teeth and from the cervical line to the root apex in both the maxilla and the mandible. In the maxilla, the greatest interroot distance was between the second premolar and the first molar. In the mandible, the greatest interroot distance was between the first and second molars. The maxillary buccolingual bone width exceeded 10 mm from 7 mm (between canine and first premolar), 5 mm (between second premolar and first molar), and 4 mm (between first and second molars) above the cervical line. The mandibular buccolingual bone width exceeded 10 mm from 7 mm (between second premolar and first molar) and 4 mm (between first and second molars) below the cervical line. Conclusions: The safest zone for placement of a miniscrew in the maxilla was between the second premolar and the first molar, from 6 to 8 mm from the cervical line. The safest zone for placement of a miniscrew in the mandible was between the first and second molars, less than 5 mm from the cervical line.
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Kharouf, Naji, Youssef Haïkel, and Davide Mancino. "Unusual Maxillary First Molars with C-Shaped Morphology on the Same Patient: Variation in Root Canal Anatomy." Case Reports in Dentistry 2019 (October 22, 2019): 1–10. http://dx.doi.org/10.1155/2019/1857289.
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A maxillary first molar should be considered a four-canal tooth until proved otherwise; however, a clinician should also be aware of the possibility of the presence of C-shaped root canal configuration with or without possibility of splitting into two or three canals. The two clinical cases reported in this paper describe the endodontic treatment of two maxillary first molars, on the same patient, with uncommon anatomy: the first case is about a maxillary first molar with only one C-shaped root and one oval canal with a large buccolingual diameter, a C1 type according to Fan’s classification; the second case, about the contralateral maxillary first molar, is probably the first case documented of a maxillary first molar with a C-shaped root canal and C-shaped root with complete fusion of the three roots, having a C3 configuration.
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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 the most common and seen in 98.6% of first molars and 89.9% of second molars. Single root was seen in 1.4% of second molars. The incidence of MB2 canal in the first molar is 64.1% and in second molar 23%. C-shaped canals were found in 1.4% of the second molars Conclusion Southern West Coastal Indian population showed features that were similar to other regions of Indian Population. The CBCT is a wonder tool for the study of root canal morphology and a reliable source of information for retrospective studies. How to cite this article Mohan RP, Thomas MS, Shetty N, Ahmed J, Pallippurath G, Tallada A. Evaluation of the Root and Canal Morphology of Maxillary First and Second Molar using Cone Beam Computed Tomography: A Retrospective Study. World J Dent 2017;8(2):134-138.
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Nam, Ok Hyung, Hyo Jung Ahn, Mi Sun Kim, and Jae-Hong Park. "Treatment of Ectopic Permanent Maxillary First Molar Using a K-loop." Journal of Clinical Pediatric Dentistry 39, no. 4 (June 1, 2015): 387–91. http://dx.doi.org/10.17796/1053-4628-39.4.387.
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Ectopic eruption of permanent maxillary first molar can cause root resorption of adjacent primary second molar, thus leading to early loss of primary maxillary second molar. Therefore, it is necessary to correct ectopic maxillary first molar. This case report demonstrates that K-loop can be used as a simple, comfortable, and easier method to correct ectopic eruption of permanent maxillary first molar in existing severe root resorption on adjacent primary second molar.
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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 (April 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 maxillary first molars, 107 out of 118 had a buccal inclination, with a mean of 4.85° ± 4.22°. Conclusions: There is a curvature to the inclinations of first molars in untreated adults, where the maxillary molars have a slight buccal inclination and mandibular molars have a slight lingual inclination.
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Pandey, Nashib, Sujaya Gupta, Ankit Shah, Anju Khapung, and Bhageshwar Dhami. "Sub Sinus Ridge Height at First Molar Region- A Panoramic Radiograph Based Study." Journal of Nepal Health Research Council 18, no. 2 (September 7, 2020): 243–47. http://dx.doi.org/10.33314/jnhrc.v18i2.2675.
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Background: Among various replacement options available for maxillary molars, implants necessitate the need to examine available ridge height and width. Panoramic radiographs (orthopantomograms) are routinely used for preliminary determination of ridge height which is helpful in communicating with patients regarding treatment needs and options. This study was designed with the aim to assess the sub sinus ridge height at dentulous and edentulous first molar sites.Methods: A cross-sectional study was conducted from March to November 2019 among patients visiting the dental college. The orthopantomograms of 455 patients were prospectively collected and analysed using Carestream imaging software (version 7.0.0). Distance from alveolar crest to maxillary sinus was measured in first molar region. Results: Mean minimal sub sinus ridge height at non-missing maxillary first molar site was 8.16 ± 2.6 mm, whereas for missing maxillary first molar site it was 5.25 ± 2.28 mm and the difference was statistically significant (p<0.001). Statistically significant difference among the age groups and minimum subsinus ridge height (p<0.001) was observed. Conclusions: Missing maxillary first molar sites may often require vertical bone augmentation with direct sinus lifting procedures if it has to undergo replacement with dental implants in the representative Nepalese population.Keywords: Implant; Nepalese; orthopantomogram; panoramic radiography; sinus augmentation
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Mahalaxmi, Sekar, and Prem Anand. "Maxillary first molar with five canals." SRM Journal of Research in Dental Sciences 7, no. 1 (2016): 45. http://dx.doi.org/10.4103/0976-433x.176477.
Full textDissertations / Theses on the topic "Maxillary first molar"
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Alves, Cláudia Rezende Gomes. "Investigação da prevalência e morfologia do segundo conduto na raiz mésiovestibular em primeiros molares superiores por meio de tomografia computadorizada de feixe cônico de pequeno volume e alta resolução em uma população do Brasil." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23139/tde-03112016-191157/.
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Primeiros molares superiores (1oMS) podem apresentar na sua raiz mésio-vestibular um segundo conduto (MV2) que é geralmente de pequena dimensão e grande variação anatômica. Os MV2 são de difícil visualização em radiografias convencionas (bidimensionais) o que pode ser causa importante de insucessos de tratamentos endodônticos. Este problema pode ser solucionado pelo uso de um método imaginológico mais sensível como a tomografia computadorizada por feixe cônico (TCFC). Com o objetivo de determinar, pela primeira vez na literatura, a prevalência e a morfologia do conduto MV2 numa população brasileira foram avaliadas 414 TCFC, de pequeno FOV (5 ou 8) e alta resolução tomadas para fins de diagnósticos num intervalo de 2 meses. Destas foram selecionadas as TCFCs de 186 mulheres e 101 homens, com idades entre 9 e 93 anos (média de 49,43 ± 16,76), que apresentavam ao menos um 1oMS, totalizando 362 dentes. Para avaliar a reprodutibilidade na detecção do conduto MV2 nas TCFC todas as imagens foram avaliadas por três examinadores diferentes e os dados foram comparados pelo teste Kappa. Obteve-se como resultado alta reprodutibilidade interobservadores (Kappa entre 0,79 e 0,88; p<0,0001). Assim sendo, os dados obtidos de apenas 1 dos examinadores foram avaliados estatisticamente por testes ANOVA, ou Kruskal Wallis e de Correlação de Pearson (p<=0,05). O conduto MV2 foi detectado em 68,23% dos 1osMS avaliados. A raiz mésiovestibular destes dentes apresentou predominantemente o Tipo II (38,12%) da classificação de Vertucci (1984). A presença do conduto MV2 foi significativamente maior em pacientes com idades menores (média de 45.04; p<0,01) que daqueles que não apresentaram o MV2 (média de 53.46). Não houve correlação entre a presença de conduto MV2 tanto com relação ao gênero (p=0,14), nem ao lado do 1oMS (p=0.53), quanto ao tamanho do FOV (p=0.09) da TCFC. Houve correlação negativa significativa (p=0.008) entre a classificação de Vertucci do MV2 e o tamanho do FOV da TCFC, ou seja, TCFC de FOV menor (FOV 5) encontraram MV2 com tipos maiores da classificação de Vertucci. Setenta e cinco pacientes apresentavam os 2 1osMS nas TCFCs, destes 58 pacientes (77,33%) apresentaram ou presença ou ausência do conduto MV2 simultaneamente em ambos lados. As idades dos pacientes que apresentaram o conduto MV2 nos dentes de ambos os lados (44; 58,66%) foram significativamente menores que daqueles que não apresentaram o conduto MV2 em nenhum dos lados (14; 18,66%) e também em somente um dos lados (17; 22,66%) (p<0,05). Concluiu-se que há alta prevalência do conduto MV2 na população examinada que ocorrem predominantemente em indivíduos jovens. Mais ainda, a detecção do MV2 independe do tamanho do FOV, porém TCFCs de FOV menor são mais sensíveis na análise de detalhes anatômicos destes condutos.Upper first molars (UFM) may have on their mesiobuccal root a second canal (MB2), which is usually small and with large anatomical variation. The MB2s are difficult to detect in conventional radiographs (two-dimensional) and can be a major cause of failure of endodontic treatments. This problem could be circumvented by using a more sensitive imaginologic method as cone beam computed tomography (CBCT). In order to determine for the first time in the literature the prevalence and morphology of MB2 canal in a Brazilian population 414 CBCTs of small FOV (5 or 8) and high resolution taken for diagnostic purposes in a 2-month interval were evaluated. Of these, CBCTs of 186 women and 101 men, aged 9 to 93 years old (mean age 49.43 ± 16.76) who had at least one UFM were selected, totaling 362 teeth. To assess the reproducibility of the MB2 canal detection in CBTCs three different investigators evaluated all images and the data were compared with the Kappa\'s test. A high interobserver reproducibility (Kappa between 0.79 and 0.88; p <0.0001) was observed. Then, the data obtained from only one of the examiners were analyzed by ANOVA or Kruskal Wallis and Pearson\'s correlation (p <= 0.05). The MB2 canal was detected in 68.23% of the UFM examined. The mesiobuccal root of these teeth predominantely presented the Type II (38.12%) according to Vertucci\'s classification (1984). The presence of MB2 was similar in both genders female and male (p=0,14) and significantly higher in patients with younger ages (mean 45.04 years old, P <0.01) than in those who did not present the MB2 (average 53.46 years old). There was no correlation between the presences of MB2 canal in relation to the side of the UFM (p = 0:53), as well as to the size of the FOV (p = 0:09). There was a significant negative correlation (p = 0.008) between the Vertucci\'s classification of MB2 and the size of FOV (i.e. the smaller FOV detected MB2 with higher Vertucci\'s types). Seventy-five patients had 2 UFM in the CBTCs, from these 58 patients (77.33%) showed the presence or absence or MB2 canal simultaneously on both sides. The ages of the patients with MB2 in teeth on both sides (44; 58.66%) were significantly smaller than those of patients who did not presente the MB2 on either side (14; 18.66%) or in only side (17; 22.66%) (p <0.05). It was concluded that there is high prevalence of MB2 in the examined population, which occurred predominantly in young individuals. Moreover, the detection of MB2 does not dependent on the size of FOV but CBTCs of smaller FOV are more sensitive in the analysis of anatomical details of these canals.
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Lin, Yai-Tin, and 林雅婷. "Space changes after premature loss of the maxillary first deciduous molar - a longitudinal study." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/86475748933798387590.
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碩士長庚大學
顱顏口腔醫學研究所
92
Abstract The purpose of this study was to evaluate the space changes after premature loss of the maxillary first deciduous molar during the eruption of first permanent molar and use established model to investigate the long-term space changes after unilateral premature loss of the maxillary first deciduous molar. Nineteen children with unilateral premature loss of the maxillary first deciduous molar were selected from the children’s dental clinic for this study. The age ranged from 4.1 to 7.1 years with an average of 5.9 years. Maxillary study casts were made from alginate impression for each initial examination and follow-up examination six months later. Six measurements including D＋E space, arch width, arch length, arch perimeter, intercanine width and intercanine depth were tested for comparisons between the initial examination and the follow-up examination six months later. The D＋E space of intact deciduous molars served as a control. The results showed that the D＋E space on the extraction was significantly shorter in the group with the follow-up examination six months later as compared to that group with the initial examination (p<0.01). The arch length was significantly shorter in the group with the follow-up examination six months later as compared to that group with the initial examination the follow-up examination six months later (p<0.01). The intercanine width after the follow-up examination six months later was significantly wider than the initial examination (p<0.01). However, the absence of significant differences was found on arch width, arch perimeter and intercanine depth between the initial examination and the follow-up examination six months later (p>0.05). It is concluded that early space changes after premature loss of the maxillary first deciduous molar during the eruption of first permanent molar are mostly distal shift of the primary cuspid and maxillary permanent anterior incisors.
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Chien, Chia-Yuan, and 簡嘉源. "The study of Three-Dimensional Model Reconstruction of the Maxillary First Molar and its Finite Element Analysis." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/yv5v3m.
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碩士國立臺北科技大學
製造科技研究所
97
The aims of this study are to establish a three-dimensional model for porcelain fused to metal (PFM) of the maxillary first molar based on Digital Imaging and Communications in Medicine (DICOM) data from computed tomography (CT) scanning, and to analyze the stress distribution and displacement of the maxillary first molar by using the finite element method. According to the concept of reverse engineering, the CT DICOM data were input into Mimics software to build a preliminary 3D model. After loading the preliminary model into the Freeform software, an enhanced model identified by the finite element analysis (FEA) software was created, which consisted of porcelain crown, metal crown, dentin, pulp, periodontal membrane, cortical bone and cancellous bone. Finally, by using the software－COSMOS/Works, we simulated the chew of teeth and analyzed the stress distribution and displacement of the maxillary first molar with PFM in different materials (i.e., Au-Pd allay, PFM,Ni-Cr alloy and Ti-alloy) under perpendicularity loading and oblique loading, respectively. We successfully combine the CT scanning images and Mimics and FreeForm software to construct a three-dimensional finite element model for PFM of the maxillary first molar. The model with high degree of similarity in geometry and mechanics can be applied to the natural examples and suggested to provide useful information for further biomechanical researches as well.
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Liu, Wei-Chu, and 劉韋初. "Biomechanical effects of deep margin elevation technique on maxillary first molar with onlay restoration by 3D finite element analysis." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/g7fabp.
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碩士國立陽明大學
牙醫學系
105
Statement of problem Traditionally, if we want to restore the tooth with sub-gingival defect, there are some problems need to face, like remove too much sound tooth structure, hard to take impression, remove excessive cement difficulty. Recently, deep margin elevation technique become the solution for those problems. However, no sufficient evidences and long time clinical follow up to support the prognosis of deep margin elevation. Only some in vitro studies focus on margin integrity of interface between different materials, we could not understand the stress distribution of those interfaces. Purpose Using the finite element method to observe the stress distribution between interfaces of human upper first molar with deep margin elevation technique from different depth of distal sub-gingival defect and restored by ceramic onlay, and compared to a model only restored by onlay without deep margin elevation technique. Material and methods Combined micro computed tomography and three dimensional computer-aided design software to build up a human upper first molar model, then make four different models: sub-gingival 1mm, 2mm and 3mm distal defect, then build up to supra-gingival 1mm, each of those three models contains 5 parts: onlay, cement layer, composite resin, enamel and dentin. And one model which with distal sub-gingival defect restored by onlay directly, contains four parts: onlay, cement layer, enamel and dentin. Loading force with 800N and 300N to simulate the biting force of clenching and chewing, then observing the stress distribution of the interface between composite resin and dentin. Result Comparing sub-gingival 2mm models, with or without deep margin elevation technique. The model with deep margin elevation reduces the von mise’s stress and maximum shear stress of the interface between composite resin and dentin. Moreover, both two stress increased over distal side of the interface, especially in the model with sub-gingival 3mm defect while clenching, the maximum shear stress is equal to the bonding strength of modern bonding systems. Conclusion Within the limitation of finite element analysis, the following conclusion can be drawn: (1) when the defect within 2mm, using deep margin elevation technique can reduce the stress concentration between composite resin and dentin, (2) if the defect approach to 3mm, deep margin elevation technique is not recommended, (3) deep margin elevation technique is also not recommended for those patients with clenching.
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Dabbagh, Basma. "Ectopic Eruption of the Maxillary First Permanent Molar: Rate and Predictive Factors of Self-correction and Survey of Specialists Attitudes Regarding Intervention." Thesis, 2013. http://hdl.handle.net/1807/42806.
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Purpose: To retrospectively assess the incidence and predictive factors for self-correction of ectopic eruption of maxillary permanent first molars (EE) and the prevailing attitudes amongst surveyed specialists regarding intervention in cases of EE.
Methods: Charts of patients diagnosed with EE were assessed for predictive clinical and radiographic factors. An online survey was sent to pediatric dentists and orthodontists.
Results: The rate of self-correction was 71%. One third of self-corrections occurred after age 9. Increased amount of impaction (r(43)=0.59, p<.001) and degree of resorption (r(57)=0.41, p=.001) were positively correlated with irreversibility. Orthodontists estimated the spontaneous self-correction rate to be lower (t(1178)=19.2, p<.001) than pediatric dentists.
Conclusions: One third of self-corrections occurred after 9 years of age and delaying treatment of EE may be a viable option when uncertain of the outcome. Reliable predictive factors of irreversibility of EE were identified. Differences exist between pediatric dentists and orthodontists regarding management of EE.
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Blanchard, Mathieu. "Métodos de localização do segundo canal mesiovestibular do primeiro molar maxilar: revisão narrativa." Master's thesis, 2019. http://hdl.handle.net/10284/8833.
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O conhecimento da morfologia dos canais radiculares e suas frequentes variações é um requisito fundamental para o tratamento endodôntico. É geralmente admitido que a principal causa de falha do tratamento endodôntico é a incapacidade de reconhecer e consequentemente tratar adequadamente todos os canais radiculares do dente.
A raiz mesiovestibular do primeiro molar maxilar tem gerado mais pesquisa e investigação do que qualquer outra raiz. Entretanto, há uma falta de uniformidade na literatura relativamente à abordagem do segundo canal mesiovestibular que está presente em 73% dos casos.
A falta de tratamento do segundo canal mesiovestibular reduz o prognóstico para o tratamento endodôntico a longo prazo. Assim é frequentemente esquecido durante os procedimentos de rotina pelo facto de ser difícil localizá-lo sem ajuda.
Esta dissertação tem como objetivo principal efetuar uma revisão da literatura científica existente sobre os dispositivos de localização do segundo canal mesiovestibular, começando pela radiologia convencional e em seguida pela imagem tridimensional, que parece ser uma ferramenta confiável para explorar a anatomia dos canais radiculares, assim como os métodos e técnicas clinicas que facilitam a sua localização durante a prática.
Desde modo, pode concluir-se que existem vários métodos de localização do segundo canal mesiovestibular que o Médico Dentista deve conhecer para executar o tratamento endodôntico do primeiro molar maxilar nas melhores condições possíveis, a fim de evitar a re-contaminação bacteriana e assim o fracasso do tratamento.Knowledge of root canal morphology and its frequent variations is a fundamental requirement for endodontic treatment. It is generally accepted that the main cause of failure of endodontic treatment is the inability to recognize and consequently adequately treat all root canals of the tooth. The mesiobuccal root of the first maxillary molar has generated more research and investigation than any other root. However, there is a lack of uniformity in the literature regarding the approach to the second mesiobuccal canal, wich is presente in 73% of cases. The lack of treatment of the second mesiobuccal canal reduces the prognosis for longterm endodontic treatment. It is often forgotten during routine procedures because it is difficult to locate it without help. The main objective of this dissertation is to review the existing scientific literature on the localization devices of the second mesiobuccal canal, starting with conventional radiology and then with three-dimensional imaging, which seems to be a reliable tool for exploring the anatomy of root canals, as well as the clinical methods and techniques that facilitate their location during practice. Therefore, it can be concluded that there are several methods of locating the second mesiobuccal canal that the dental surgeon should know to execute the endodontic treatment of the first maxillary molar in the best possible conditions, in order to avoid bacterial re-contamination and thus treatment failure.
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Tzeng, Li-Ting, and 曾莉婷. "Analysis of root canal system and the consistency between maxillary first and second molars in a Taiwanese population: a CBCT study." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/44863354353985593429.
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碩士國立臺灣大學
臨床牙醫學研究所
104
Objectives The aim of this study was to use cone-beam computed tomography (CBCT) to analyze the morphology and similarity / symmetry of root canal systems in the maxillary first and second molars in Taiwanese. Materials and methods A total of 519 patients in the dental department of NTUH from January 2014 to December 2014 were enrolled. Overall, CBCT images of 1741 maxillary molars were blindly examined by two endodontists to analyze the correlation of root canal systems between the first molars and second molars as well as the bilateral first or second molars. Results The most common type in Taiwanese maxillary first molars is 3R4C (3 roots/4 canals), whereas in maxillary second molars is 3R3C.The symmetry of root canal system in bilateral maxillary first and second molars were found in 87.36% and 79.85%,respectively. The similarities of root canal system in adjacent maxillary first and second molars were 53.07% in right side and 52.58% in left side. The concurrence of MB2 canal in bilateral maxillary first molars is 77.8%, whereas is 35.97% in maxillary second molars. In the 110 patients MB2 canal in bilateral maxillary second molars, the chances of bilateral MB2 canals in their maxillary first molar is almost 100%. Conclusions Maxillary first molars have higher prevalence of 3R4C root canal system than maxillary second molars. The symmetry and similarity were higher in bilateral maxillary homonym molars than in adjacent maxillary molars. These information and assessing CBCT images in advance provide a totally understandings of the whole root canal system, and improve the endodontic treatment outcome efficiently.
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Irhaim, Abdelmenem Ali. "Evaluation of the root and canal morphology of permanent maxillary first molars cone beam computed tomography in a sample of patients treated at the Wits oral health centre." Thesis, 2016. http://hdl.handle.net/10539/23182.
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Methods: Two hundred CBCT images with bilateral permanent maxillary first molar were carefully examined by two dentists. Information obtained was on the number and morphology of roots per tooth, the number of canals per root, the root canal configuration in each root using Vertucci’s classification, the relationship between MB2, tooth position and different age groups, and the frequency of C-shaped root canals were determined.
Results: The prevalence of three separate roots was 91%. The frequency of three roots where two of them were fused was 8%. Two fused roots were observed in 0.5% of teeth and three fused roots were seen in 0.5% teeth. Regarding the mesiobuccal roots (MBR), the most frequent was Vertucci type IV root canal configuration (42.75%), then type I ( 39.5%),Type II (15%), type III (1.25%); type V (0.75%), and type VI (0, 75%). The occurrence of bilateral MB2 was 65, 75% while the unilateral occurrence of MB2 was 34, 24%.There was no significant difference between 5 age groups (p=0.759, and tooth position p=9977 in regard of presence of MB2. (Distobuccal roots (DBR) displayed a type I configuration in 99.5% of teeth, with only 0.5% of teeth displaying a type IV canal configuration. All palatal roots (PR) had type I canal configuration. No C shaped canals were observed in the sample of 400 permanent maxillary first molars teeth.
Conclusion: Cone-beam computed tomography provides valuable information about the anatomy of root and canal morphology which may facilitate root canal therapy.MT2017
Book chapters on the topic "Maxillary first molar"
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Kupietzky, Ari, and Jane A. Soxman. "Ectopic eruption of maxillary first permanent molar." In Handbook of Clinical Techniques in Pediatric Dentistry, 107–19. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781118998199.ch13.
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"Root Fragment of the First Molar in the Left Maxillary Sinus." In Atlas of Neural Therapy, edited by Mathias P. Dosch. Stuttgart: Georg Thieme Verlag, 2012. http://dx.doi.org/10.1055/b-0034-75762.
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Kim, Tae-Woo, and Hyewon Kim. "Precise miniscrew implant insertion technique between the roots of maxillary second premolar and first molar (Kim's stent)." In Skeletal Anchorage in Orthodontic Treatment of Class II Malocclusion, 97–100. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-7234-3649-2.00017-8.
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Atkinson, Martin E. "Mastication." In Anatomy for Dental Students. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199234462.003.0035.
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Now you have an understanding of the anatomy of the maxilla and mandible, the TMJs, and jaw musculature, we can examine how these structures work together to produce the complex actions involved in the biting and chewing of food. Technically, incision is biting a piece from a larger chunk of food and mastication is the grinding down of that piece into smaller components and mixing them with saliva. Mastication is often used to cover both actions. Box 26.1 briefly compares the anatomy of the human dentition to that of other mammals. As well as knowledge of the TMJ, muscles of mastication, and other muscles used in jaw movements, it is necessary to appreciate some aspects of the static and dynamic relationships of the teeth to understand chewing movements. The first thing to notice is the bigger width of the upper dental arch compared to the lower arch, a condition known as anisognathy. In Figure 26.1A , you can see that the maxillary molars overhang the mandibular teeth by half a cusp width so the buccal cusps of the lower molars and premolars occlude between the buccal and palatal cusps of the maxillary teeth. Observe also that the long axis of the maxillary molars and premolars incline buccally while the corresponding axis of the mandibular teeth incline lingually; the occlusal plane of the posterior teeth is thus curved transversely as illustrated in Figure 26.1A . It would be possible to chew food simply by moving the teeth up and down without any side-to-side movement, but this would be inefficient and not make full use of the cusps on the occlusal surfaces of posterior teeth. However, we can only chew on one side at a time because of the anisognathy of the upper and lower teeth. Due to anisognathic jaw positions, the maxillary anterior teeth are also going to protrude in front of the mandibular anterior teeth. Figure 26.1B illustrates the normal relationships of the anterior teeth. The maxillary incisors overhang the mandibular incisors by about 2–3 mm in the horizontal plane; this is called the overjet. The upper incisors usually have a vertical overhang, the overbite, of about the same amount. As mentioned in Chapter 24 , the mouth at rest is closed by tonic contraction of the muscles of mastication and facial expression.
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Mitchell, David A., Laura Mitchell, and Lorna McCaul. "Orthodontics." In Oxford Handbook of Clinical Dentistry, 119–70. Oxford University Press, 2014. http://dx.doi.org/10.1093/med/9780199679850.003.0004.
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Contents. What is orthodontics?. Definitions. Orthodontic assessment. The Index of Orthodontic Treatment Need. Cephalometrics. More cephalometrics. Treatment planning. Management of the developing dentition. Extractions. Extraction of poor quality first permanent molars. Spacing. Distal movement of the upper buccal segments. Buccally displaced maxillary canines. Palatally displaced maxillary canines. Increased overjet. Increased overbite. Management of increased overbite. Anterior open bite (AOB). Reverse overjet. Crossbites. Anchorage. Temporary anchorage devices (TAD). Removable appliances. Fixed appliances. Functional appliances—rationale and mode of action. Types of functional appliance and practical tips. Orthodontics and orthognathic surgery. Cleft lip and palate.
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A. Mufadhal, Abdulbaset, Mohammed A. Aldawla, and Ahmed A. Madfa. "External and Internal Anatomy of Maxillary Permanent First Molars." In Human Teeth - Key Skills and Clinical Illustrations. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.84518.
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Dhaimy, Said, Lamyae Bedida, Hafsa El Merini, and Imane Benkiran. "External and Internal Root Canal Anatomy of the First and Second Permanent Maxillary Molars." In Human Teeth - Key Skills and Clinical Illustrations. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.85746.
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Trinkaus, Erik, Alexandra P. Buzhilova, Maria B. Mednikova, and Maria V. Dobrovolskaya. "The Sunghir Dental and Alveolar Remains." In The People of Sunghir. Oxford University Press, 2014. http://dx.doi.org/10.1093/oso/9780199381050.003.0012.
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Sunghir 1, 2, and 3 retain most of their maxillary and mandibular teeth, although those of Sunghir 1 are heavily worn and those of Sunghir 2 and especially Sunghir 3 were developing at the times of their deaths. As a result, the two immature individuals provide extensive data on their dental crown discrete morphology and crown metrics, but there are limited data on the third molars of Sunghir 2 and on the premolars and second molars of Sunghir 3 (and none on her third molars beyond their calcification stage; see chapter 6). In addition, although they retain none of their teeth, Sunghir 5 and especially 6 preserve alveolar bone, and they thereby provide limited dentoalveolar data. The Sunghir dentitions and alveoli thus have the potential to provide paleobiological data on their crown configurations, crown dimensions, some root lengths and configurations, in addition to wear patterns. The condition and salient aspects of each are provided first, followed by comparisons of their dimensions and shapes in a Late Pleistocene context. As noted in chapter 4, Sunghir 1 retains 31 of his original 32 teeth, and the one missing tooth, the left I2, was probably lost shortly before death. All of the teeth are heavily worn, thereby limiting morphological and morphometric observations principally to the M3s. But the other teeth provide considerable information regarding their wear patterns. The right I1 consists of worn dentin with a partial thin enamel ring around the labial margin of the crown. The dentin is occlusally flat to convex, the convexity produced mostly by a rounding of the lingual edge of the crown. There is a small area of secondary dentin exposed in the middle of the occlusal dentin. Note that the protruding nature of the tooth is a postmortem artifact, and it probably was originally at the same level as the left I1. There is no unusual wear in the mandibular incisors to match its procumbent state. The left I1 has similar wear, except that it retains more of the thin enamel ring around the lingual side and hence lacks the lingual rounding evident on the right one.
Conference papers on the topic "Maxillary first molar"
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Liang, Wei, Lulu Yang, Shuyu Wang, and Baohua Wang. "Three-dimensional finite element analysis of maxillary first molar orthodontics." In 2010 3rd International Conference on Biomedical Engineering and Informatics (BMEI). IEEE, 2010. http://dx.doi.org/10.1109/bmei.2010.5639238.
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Riza, Ahyar, and Yulia Handayani Siregar. "The Comparison of Lidocaine 2% with Adrenaline 1: 100.000 Onset in First or Second Maxillary Molar Extractions in Two Age Groups at Oral Surgery Department Faculty of Dentistry, University of North Sumatera March-April 2017." In International Dental Conference of Sumatera Utara 2017 (IDCSU 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/idcsu-17.2018.3.
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