Journal articles: '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.

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Bond, John L., Gary Hartwell, and Frank R. Portell. "Maxillary first molar with six canals." Journal of Endodontics 14, no. 5 (January 1988): 258–60. http://dx.doi.org/10.1016/s0099-2399(88)80180-8.

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Lee, Ya-Yun, Pei-Ying Yeh, Sheng-Fang Pai, and Shue-Fen Yang. "Maxillary first molar with six canals." Journal of Dental Sciences 4, no. 4 (December 2009): 198–201. http://dx.doi.org/10.1016/s1991-7902(09)60027-1.

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Umer, F. "Maxillary first molar with five canals." Case Reports 2014, sep19 1 (September 19, 2014): bcr2014205757. http://dx.doi.org/10.1136/bcr-2014-205757.

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Mulay, Sanjyot, Gaurav Kadam, and Hansa Jain. "Accuracy of Various Diagnostic Aids in Detection of MB2 Canal in Maxillary First Molar: In vivo Study." World Journal of Dentistry 7, no. 2 (2016): 78–82. http://dx.doi.org/10.5005/jp-journals-10015-1369.

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ABSTRACT Aim To evaluate and compare the accuracy of radiographic, visual, dye and magnification method in detection of second mesiobuccal (MB2) canal in maxillary first molar. Materials and methods One hundred males and females patients in age group of 20 to 45 years with maxillary first molar teeth indicated for root canal treatment were selected for the study. The presence of MB2 canal in maxillary first molar was observed by four independent observers using radiographic, visual, dye, magnification diagnostic aids. Results The study showed that there was a large difference in detecting MB2 canal in maxillary first molar when radiographic was compared with visual method and magnification method (i.e., p < 0.01). Whereas there was a nonsignificant difference when radiographic and dye method were compared (i.e., p > 0.05). Conclusion It was concluded that the incidence of MB2 canal in mesiobuccal roots of permanent maxillary first molars was detected most using magnification method, i.e., 87%. Accuracy of radiographic method was found to be least, i.e., 19%. How to cite this article Mulay S, Kadam G, Jain H. Accuracy of Various Diagnostic Aids in Detection of MB2 Canal in Maxillary First Molar: In vivo Study. World J Dent 2016;7(2):78-82.

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Kravitz, Neal D., Budi Kusnoto, Peter T. Tsay, and William F. Hohlt. "Intrusion of Overerupted Upper First Molar Using Two Orthodontic Miniscrews." Angle Orthodontist 77, no. 5 (September 1, 2007): 915–22. http://dx.doi.org/10.2319/050106-187.1.

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Abstract Loss of the mandibular first molar often leads to the overeruption of the opposing maxillary first molar, resulting in occlusal interference, loss of periodontal bony support, and inadequate room to restore the mandibular edentulous space. Without orthodontic molar intrusion or segmental surgical impaction, restoring the posterior occlusion often entails the need for significant reduction of maxillary molar crown height, with the potential need for costly iatrogenic root canal therapy and restoration. The literature has cited successful maxillary molar intrusion with minor prosthodontic reduction using palatal orthodontic miniscrews and buccal zygomatic miniplates. In this report, the authors present successful maxillary molar intrusion with two orthodontic miniscrews in a patient with extreme dental anxiety and significant dental erosion due to gastric reflux. Using two orthodontic miniscrews for skeletal anchorage to intrude the maxillary molar simplified the orthodontic treatment by eliminating the need for extensive surgery, headgear, and intraoral multiunit anchorage and preserved indispensable tooth enamel. The clinical results showed significant intrusion through the maxillary sinus cortical floor while maintaining periodontal health, tooth vitality, and root length.

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Janakiraman, Nandakumar, Pawandeep Gill, Madhur Upadhyay, Ravindra Nanda, and Flavio Uribe. "Response of the maxillary dentition to a statically determinate one-couple system with tip-back mechanics: A prospective clinical trial." Angle Orthodontist 86, no. 1 (May 15, 2015): 32–38. http://dx.doi.org/10.2319/012815-68.1.

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ABSTRACT Objective: To quantify the effects of tip-back mechanics on the maxillary first molars and incisors. Materials and Methods: Sixteen subjects with Class II end-on malocclusion were treated with an intrusion arch to achieve distalization of the maxillary molar through tip-back mechanics. Lateral cephalograms were taken prior to molar tip-back (T1), after molar tip-back (T2), and after molar root uprighting (T3). Data were analyzed using the Friedman’s and Wilcoxon signed rank tests to evaluate differences in time points (P ≤ .016). Results: The maxillary first molar distalized 1.53 mm (P = .001) with 6.65° (P = .001) of distal tipping and 0.86 mm (P = .001) of extrusion at T2. Minor relapse of the first molar (mesial direction) was seen at T3. The maxillary incisors flared labially 0.4 mm, and the incisor root apex moved palatally 1.19 mm (P = .005) at T2. At T3, the incisor root apex moved palatally 1.5 mm (P = .003) from T1. An angular change from T1 of 3.31° (P = .008) and 3.53° (P = .014) was seen at T2 and T3, respectively, as a result of palatal root movement of the maxillary incisors. Conclusions: A significant amount of distalization of maxillary molars was attained at the crown level with tip-back mechanics. Palatal root angulation change was significant in the incisors with minimal anteroposterior movement of the incisal edge.

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Kurokawa, Makoto, Hiroyuki Kanzaki, Hajime Tokiwa, Hideho Handa, Kazutoshi Nakaoka, Yoshiki Hamada, Hitoshi Kato, and Yoshiki Nakamura. "The main occluding area in normal occlusion and mandibular prognathism." Angle Orthodontist 86, no. 1 (April 15, 2015): 87–93. http://dx.doi.org/10.2319/111114-807.1.

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ABSTRACT Objective: To clarify whether the concept of main occluding area, where hard food is initially crushed, exists in patients who have a jaw deformity. Materials and Methods: Nineteen subjects with normal occlusion, 18 patients with mandibular prognathism, and 11 patients with mandibular prognathism who had undergone orthognathic surgery participated in this study. The main occluding area was identified by clenching Temporary Stopping. The coincidence, location of the main occluding area, and distance from the first molars to main occluding area were examined. Results: High coincidence of the main occluding area was obtained in all groups, signifying that the main occluding area exists even in these patients. Mandibular main occluding area was located on the first molar in all groups. Maxillary main occluding area in subjects with normal occlusion was located on the first molar. However, it was located on the second premolar and first molar in patients with mandibular prognathism, and on the first and second molars in patients with mandibular prognathism who had undergone orthognathic surgery. There was a statistically significant difference in distance from the maxillary first molar to the main occluding area among groups, but there was no difference in the distance from the mandibular first molar among groups. Conclusion: The main occluding area is more stable on the mandibular first molar than the maxilla in all groups.

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Aslıer, Mustafa, Mustafa Cenk Ecevit, Sülen Sarıoğlu, and Semih Sütay. "A Case of Ameloblastic Fibroodontoma Extending Maxillary Sinus with Erupted Tooth: Is Transcanine Approach with Alveolectomy Feasible?" Case Reports in Otolaryngology 2016 (2016): 1–4. http://dx.doi.org/10.1155/2016/8594074.

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Ameloblastic fibroodontoma (AFO) is a rare entity of mixed odontogenic tumors and frequently arises from posterior portion of the maxilla or mandible in first two decades of life. Herein, a 35-year-old woman with a noncontributory medical history who presented with a progressive left maxillary toothache, left maxillary first molar tooth mobility, and swelling in the left maxillary molar area for the last 2 months was reported. Radiologically, a tumor that originated from periapical area of the second mature molar teeth of maxilla was seen and additively unerupted tooth was not detected. The histopathologic examination revealed AFO. The patient is disease-free for five years after treated with limited segmental alveolectomy combining with Caldwell-Luc procedure.

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Kamble, Ranjit, Ananya Hazarey, Pushpa Hazarey, and Jeet Singh. "Assessment of Positional Variation of Maxillary Permanent First Molar with respect to the Infrazygomatic Crest (Key Ridge) in Skeletal Class I, II and III Cases." World Journal of Dentistry 4, no. 4 (2013): 228–34. http://dx.doi.org/10.5005/jp-journals-10015-1237.

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ABSTRACT Introduction To assess the positional variations of maxillary first permanent molar in horizontal and vertical plane with respect to infrazygomatic crest (key ridge) in skeletal class I, II and III cases. Materials and methods A total of 103 lateral cephalograms comprising of 40 skeletal class I (control group), 35 class II and 28 class III cases were selected and analyzed. Six parameters were chosen to compare the vertical and the horizontal variations of first permanent molars. Results The angulation of maxillary first molar with respect to key ridge in class II and III was 2.42° and 6.97° as compared to class I which was 5.35°. The mesiobuccal cusp tip of maxillary first molar from key ridge in class II and III was 2.11 and 5.46 mm respectively as compared to class I (1.62 mm). The mesiobuccal root tip of maxillary first molar from key ridge in class II and III was 2.14 and 2.82 mm as compared to class I (1.27 mm). Conclusion The maxillary first molar was not directly under the infrazygomatic crest and was ahead of the key ridge in all the groups. The maxillary first permanent molar was placed more mesially in class II and III cases as compared to the class I cases but, in class III, it was more upright as compared to class I and II. How to cite this article Kamble R, Hazarey A, Hazarey P, Singh J. Assessment of Positional Variation of Maxillary Permanent First Molar with respect to the Infrazygomatic Crest (Key Ridge) in Skeletal Class I, II and III Cases. World J Dent 2013;4(4):228-234.

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Felsypremila, Gnanasekaran, Thilla Sekar Vinothkumar, and Deivanayagam Kandaswamy. "Anatomic symmetry of root and root canal morphology of posterior teeth in Indian subpopulation using cone beam computed tomography: A retrospective study." European Journal of Dentistry 09, no. 04 (October 2015): 500–507. http://dx.doi.org/10.4103/1305-7456.172623.

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ABSTRACT Objective: To investigate the anatomic symmetry of maxillary and mandibular posteriors in Indian subpopulation using cone beam computed tomography (CBCT). Materials and Methods: CBCT images of 246 patients that had at least one noncarious, posterior tooth free of restorations in each quadrant were enrolled for retrospective analysis. A total of 3015 teeth (811 maxillary premolars, 845 mandibular premolars, 738 maxillary molars, and 621 mandibular molars) were analyzed for number of roots and root canals, canal morphology and anatomic symmetry, and concurrent types between the maxilla and mandible. Results: There was no difference in the percentage of symmetry for maxillary first (81.5%) and second (81.5%) premolars. Mandibular second premolars (98.3%) exhibited greater symmetry than mandibular first premolars (96.1%). First molars (77.5% and 82.1%) showed greater symmetry than second molars (70.8% and 78.6%), in both maxillary and mandibular arches, respectively. The most common anatomy observed were: maxillary first premolars – 2 roots with 2 canals, maxillary second premolars – 1 root with 2 canals, mandibular first and second premolars – 1 root with 1 canal, maxillary first and second molars – 3 roots with 4 canals, and mandibular first and second molars – 2 roots with 3 canals. When compared with any other teeth, maximum asymmetry was observed in maxillary second molar (29.2%). Conclusion: The percentage of symmetry observed in the present study varied from 70% to 98% with least percentage of symmetry in maxillary second molars. These data should alert the clinicians while treating homonymous teeth of the same patient.

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Agnihotri, Gaurav, and Vimal Sikri. "Crown and Cusp Dimensions of the Maxillary First Molar: A Study of Sexual Dimorphism in Indian Jat Sikhs." Dental Anthropology Journal 23, no. 1 (September 2, 2018): 1–6. http://dx.doi.org/10.26575/daj.v23i1.64.

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The human first maxillary molar provides clues about evolution and is functionally important. Crowns of maxillary molars have four main cusps, each having an independent growth pattern and different evolutionary background. The study aims to quantify the morphometric criterion for the maxillary first molar giving a special emphasis to sexual dimorphism. Measurements of the first maxillary molar were taken on 100 casts of Jat Sikh students (50 males, 50 females) studying in the local medical college in the age group of 17-21 years. The Jat Sikh community of Punjab is endogamous at the caste level. Unpaired t-tests were used to compare the samples for males and females. There is statistically significant sexual dimorphism (P < 0.01) for the maxillary first molar’s crown and cusp components in the Jat Sikhs. The sequence of dimorphism in cusp dimensions corresponds to the order of formation of the cusps. The percentage sexual dimorphism for the hypocone is high (right 7.2%, left 7.4%).

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Pei, Jun, Jiyuan Liu, Yafei Chen, Yuanyuan Liu, Xuejuan Liao, and Jian Pan. "Relationship between maxillary posterior molar roots and the maxillary sinus floor: Cone-beam computed tomography analysis of a western Chinese population." Journal of International Medical Research 48, no. 6 (June 2020): 030006052092689. http://dx.doi.org/10.1177/0300060520926896.

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Objective This study aimed to assess the positional relationships between the maxillary sinus and the first and second molars in a western Chinese population by using cone-beam computed tomography. Methods This study included 212 patients (652 maxillary molars and 1956 roots). Patient demographics (sex and age) and cone-beam computed tomography data regarding the relationship between molar roots and the maxillary sinus were obtained. This relationship was stratified into four types for statistical analysis. Results Sex and side did not significantly influence the distance between maxillary molar roots and the maxillary sinus. However, the distance between maxillary molar roots and the maxillary sinus increased with age. The mesiobuccal root of the second molar was nearest to the maxillary sinus. The most common relationship type involved absence of root contact with the sinus border and presence of a maxillary sinus cross-section above the root apex. Conclusions Compared with other teeth, the maxillary posterior teeth have a complex anatomical structure and are closely related to the sinus. These findings may serve as reference information for root canal treatment, tooth extraction, dental implant, and other dental clinical procedures among patients in western China.

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Gündüz, Kaan, Mehtap Muğlali, and Samet Inal. "Total Impaction of Deciduous Maxillary Molars: Two Case Reports." Journal of Contemporary Dental Practice 8, no. 6 (2007): 64–71. http://dx.doi.org/10.5005/jcdp-8-6-64.

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Abstract Aim The purpose of this report is to present two cases of totally impacted maxillary deciduous molars, considered a rarity in dental practice. Background Primary tooth impaction is quite rare during the development of primary dentition. Various factors contribute to the impaction of a deciduous tooth, including anklyosis, congenitally missing permanent teeth, defects in the periodontal membrane, trauma, injury of the periodontal ligament, precocious eruption of the first permanent molar, defective eruptive force, or a combination of these factors. Reports Case #1 An 18-year-old male presented with a complaint of spontaneous repetitious pain in the maxillary right premolar region. The maxillary right second premolar was clinically absent. Panoramic and periapical radiographs revealed an impacted second premolar close to the inferior wall of the maxillary sinus and an impacted deciduous molar deeply embedded in bone within the maxillary sinus. Case #2 A 14-year-old girl presented with a complaint of crowding of the maxillary teeth. The maxillary right second premolar and the maxillary permanent canines were clinically absent. A panoramic radiograph revealed an impacted maxillary right second premolar and an impacted deciduous molar embedded within bone close to the inferior wall of the maxillary sinus. Summary The total impactation of deciduous teeth is a rare condition, and few cases have been reported in the literature. The condition generally affects the mandibular second deciduous molar and the maxillary first deciduous least often. In this paper, two cases of totally impacted maxillary deciduous molars are reported. Citation Gündüz K, Muğlali M, Inal S. Total Impaction of Deciduous Maxillary Molars: Two Case Reports. J Contemp Dent Pract 2007 September; (8)6:064-071.

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Khosravifard, Negar, Zahra Dalili Kajan, and Homayoon Hasanpoor. "Cone beam computed tomographic survey of the mesiobuccal root canal anatomy in the maxillary first and second molar teeth of an Iranian population." European Journal of Dentistry 12, no. 03 (July 2018): 422–27. http://dx.doi.org/10.4103/ejd.ejd_60_18.

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ABSTRACT Objective: The objective of this study was to evaluate the mesiobuccal (MB) root canal(s) anatomy of the maxillary first and second molar teeth in an Iranian population. Materials and Methods: Cone beam computed tomography images of 280 teeth (145 maxillary first molars and 135 maxillary second molars) were analyzed to determine the number and types of the MB root canals. Chi-square test was used to examine the relationship between the number of MB canals and sex and Mann–Whitney analysis was used to define the relationship between the number of canals and the buccopalatal dimension of the MB roots. The level of interobservers' agreement was assessed with Kappa test. Results: Nearly 44.8% of the first molar and 18.5% of the second molar teeth had an additional MB canal (MB2). Types I and III of root canals had the highest frequencies. There was no significant relationship between the number of MB root canals of maxillary first and second molars and sex (P = 0.829). The relationship between the buccopalatal dimension of the MB roots and the number of root canals was shown to be statistically significant (P = 0.001). Conclusion: Presence of MB2 had a relatively high frequency, especially in the maxillary first molars. The mean buccopalatal dimension of the MB roots showed to be interrelated with the number of root canals.

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Deon Rizzatto, Susana Maria, Luciane Macedo de Menezes, Marcus Vinicius Neiva Nunes do Rego, Guilherme Thiesen, Vanessa Pereira de Araujo, and Maria Perpétua Mota Freitas. "Maxillary first permanent molar impaction. A conservative treatment approach." Journal of Clinical Pediatric Dentistry 30, no. 2 (January 1, 2006): 169–73. http://dx.doi.org/10.17796/jcpd.30.2.5302515444r17455.

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The objective of this clinical case is to suggest a treatment approach for impaction of the maxillary first permanent molars. This approach allows access to the partially erupted tooth for orthodontic bonding and utilization of loops for distalization. An important detail is the non inclusion of the primary second molar in the orthodontic mechanics, in order to reduce the risk of early loss and preserve this tooth until exfoliation.

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Nair, Rohit, Sandhya Khasnis, and JayaprakashD Patil. "Bilateral taurodontism in permanent maxillary first molar." Indian Journal of Dental Research 30, no. 2 (2019): 314. http://dx.doi.org/10.4103/ijdr.ijdr_770_17.

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de Almeida-Gomes, Fábio, Claudio Maniglia-Ferreira, Bruno Carvalho de Sousa, and Roberto Alves dos Santos. "Six root canals in maxillary first molar." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 108, no. 3 (September 2009): e157-e159. http://dx.doi.org/10.1016/j.tripleo.2009.04.032.

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Shivanna, Sushmita, R. Kurinji Amalavathy, and S. Prakasam. "The Chambers of Secrets: Maxillary First Molar." International Journal of Oral Care & Research 4, no. 4 (2016): 273–75. http://dx.doi.org/10.5005/jp-journals-10051-0061.

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Dixit, Abhilasha, Ashwini Prasad, Pratibha Choudhary, Medhavi Sharma, and Anubha Sejra. "Enigmatic Maxillary First Molar with Five Canals." Journal of Mahatma Gandhi University of Medical Sciences and Technology 2, no. 2 (2017): 94–96. http://dx.doi.org/10.5005/jp-journals-10057-0043.

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Wong, Marston. "Maxillary first molar with three palatal canals." Journal of Endodontics 17, no. 6 (June 1991): 298–99. http://dx.doi.org/10.1016/s0099-2399(06)81871-6.

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Ramesh, N., B. Palukunnu, N. Ravindran, and P. P. Nair. "Maxillary molar distalization with first class appliance." Case Reports 2014, feb27 1 (February 27, 2014): bcr2013200182. http://dx.doi.org/10.1136/bcr-2013-200182.

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Compagnon, D., and A. Woda. "Supraeruption of the unopposed maxillary first molar." Journal of Prosthetic Dentistry 66, no. 1 (July 1991): 29–34. http://dx.doi.org/10.1016/0022-3913(91)90347-y.

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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 (December 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 established at p<0.05. Mean of oxygen saturation for the 112 molar dental pulps was 85.09%. There was no significant correlation (r=-0.007; p=0.977) between the mean of SaO2 of molar pulps with patient´s indicator finger (92.89%). There was a significant difference (p=0.037) between the mean of SaO2 of the first (85.76%) and second maxillary molars (81.87%), and it was not significant (p=0.1775) between the first and second mandibular molars. Maxillary molars had lower pulpal SaO2 (83.59%) than mandibular molars (86.89%) (p=0.018). The mean of the patient’s response time to the cold stimulus was 1.12 s (maxillary molars 1.25 s and mandibular molars 0.99 s)(p=0.052). There was no significant correlation between the time response of the patient to the cold stimulus and the SaO2 for molars. The mean oxygen saturation level was 85.09%. The mandibular molars presented higher SaO2 level than maxillary molars.

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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 (August 31, 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 dispersive X-ray spectrometer analysis were performed on the extracted mandibular first molar and maxillary primary second molar of the patient. Micro-CT images revealed the discontinuity of enamel directly connected to an accessory canal of the root.

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Celebi, Ahmet Arif, Sam H. Lee, and Chung How Kau. "Size discrepancies in molars and first key to optimal occlusion." European Journal of Dentistry 11, no. 02 (April 2017): 250–52. http://dx.doi.org/10.4103/ejd.ejd_339_16.

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ABSTRACT Objective: The aim of this research project was to determine whether the sizes of the first molars allow clinicians to achieve the first goal of an ideal clinical outcome. Material and Methods: Seventy-eight sets of dental casts that have been presented to the American Board of Orthodontics were evaluated. A Boley gauge was used to measure the length from the mesiobuccal cusp to the distobuccal cusp of the maxillary first molar and the length from the mesiobuccal groove of the mandibular first molar to the occlusal embrasure between the mandibular first and second molars. These two measurements were taken on both sides of each set of dental casts for a total of four measurements per set. Results: The maxillary measurements ranged from 3.6 to 6.9 mm with an average of 5.2 mm. The mandibular measurements ranged from 5.0 to 8.0 mm with an average of 6.5 mm. The data were tested for normality and found to be equally distributed. A t-test revealed significant differences in tooth sizes between maxillary and mandibular first molars on both sides. On average, the mesiodistal length measured on maxillary first molars was about 80% of that of their mandibular counterparts. Only 5 of the 78 sets of dental casts evaluated had equal maxillary and mandibular measurements on one side (either left or right), and none of them had equal measurements on both sides. Conclusion: Clinicians have to understand that tooth size discrepancies do exist in patients and that these discrepancies make the completion of a perfect case challenging.

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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 (July 8, 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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Hill, F. J. "Iatrogenic Root Resorption of Upper First Permanent Molars Associated with Orthodontic Treatment." British Journal of Orthodontics 14, no. 2 (April 1987): 109–13. http://dx.doi.org/10.1179/bjo.14.2.109.

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A case of severe resorption of the roots of upper first molars, associated with second molar impaction, is reported. The possible causes of this condition, which occurred as a complication of rapid maxillary expansion and distal movement of the first molars, are discussed.

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Moon, Cheol-Hyun, Jin-Uk Wee, and Hyun-Sun Lee. "Intrusion of Overerupted Molars by Corticotomy and Orthodontic Skeletal Anchorage." Angle Orthodontist 77, no. 6 (November 1, 2007): 1119–25. http://dx.doi.org/10.2319/092705-334.1.

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Abstract This article describes the orthodontic treatment of a 26-year-old female patient with overerupted left maxillary molar teeth. Her chief complaint was that the maxillary left first and the second molar intruded into the space required for the mandibular left first and the second molars, preventing prosthodontic treatment. The authors performed a corticotomy and used orthodontic skeletal anchorage with a miniplate and orthodontic miniscrews with a head modified to provide a specially designed hook. With this approach, they were able to achieve a sufficient amount of molar intrusion without discomfort, root resorption, or extrusion of the adjacent teeth. The first molar was intruded 3.0 mm and second molar was intruded 3.5 mm during 2 months of treatment. These results have been maintained for 11 months.

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Choi, Nak-Chun, Young-Chel Park, Han-Ah Lee, and Kee-Joon Lee. "Treatment of Class II Protrusion with Severe Crowding Using Indirect Miniscrew Anchorage." Angle Orthodontist 77, no. 6 (November 1, 2007): 1109–18. http://dx.doi.org/10.2319/112106-476.1.

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Abstract This report describes the nonsurgical treatment of a patient with skeletal Class II protrusion and severe crowding. A 20-year-old woman presented with the chief complaint of lip protrusion and crowding. To correct the Class II relationship, severe crowding, and lip protrusion, distal movement of the maxillary first molars using indirect miniscrew anchorage and nickel-titanium coil springs, along with extraction of the first premolars and maxillary second molars, was planned. After the distal molar movement phase was complete, the maxillary first molars had moved 8.0 mm to the distal, and the first premolars, which were splinted to the miniscrews, had moved 0.5 mm to the mesial. The results show that the distal molar movement mechanics were efficient and stable. After treatment, all of the patient's chief complaints were relieved and an esthetic facial profile was obtained.

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Alfaifi, Mohammed, Jae Hyun Park, Kiyoshi Tai, Ja Hyeong Ku, Nikhilesh R. Vaid, Yoon-Ah Kook, Ahmed M. Shoaib, and Mohamed Bayome. "Comparison of Treatment Effects with Modified C-Palatal Plates vs Greenfield Molar Distalizer Appliances in Adolescents." Journal of Clinical Pediatric Dentistry 44, no. 3 (January 1, 2020): 202–8. http://dx.doi.org/10.17796/1053-4625-44.3.12.

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Objectives: The aim of study was to evaluate skeletodental and soft tissue treatment effects and the amount of maxillary molar distalization with modified C-palatal plates vs. Greenfield molar distalizer appliances in adolescents. Study design: The samples consisted of pre- and posttreatment lateral cephalograms collected from 39 patients with Class II malocclusion. The MCPP group was comprised of 21 patients (mean age: 11.7 ± 1.3 years) treated with MCPP appliances while the GMD group included 18 patients (mean age: 11.2 ± 0.9 years) treated with GMD. Fixed orthodontic treatment started with the distalization process in both groups. From each cephalograpm, twenty-nine variables were measured for analysis and then the two groups were compared. Descriptive statistics, a paired t-test, and multivariate analysis of variance were performed to compare the treatment effects within and between the groups. Results: There was significant treatmentrelated change in the sagittal position of the maxilla and the mandible within each group. However, there were no statistically significant inter-group differences. The mean maxillary first molar distalization was 3.96 mm in the MCPP group vs. 2.85 mm in the GMD group. Both groups showed minimal distal tipping, but the maxillary incisors were significantly extruded by 3.04 ± 0.89 mm (P < .001) in GMD group. There was no significant difference in treatment duration between the groups. Conclusions: The maxillary first molars of both the MCPP and GMD groups were effectively distalized and there were significant skeletal changes in the maxilla. However, the maxillary incisors were significantly extruded in the GMD group.

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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 (November 30, 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 patients were found to have a pyramidal molar and it was more prevalent in women (18 women and 6 men). The prevalence of pyramidal molars from all first and second molars examined was 0.31%. 88 percent of pyramidal molars occurred in maxilla. All pyramidal molars were second molar.<br/>Pyramidal molar has a relatively poor periodontal prognosis compared with common multi-rooted teeth and it is important to understand the structural characteristics of root canal during pulp treatment. Clinicians should be able to understand the anatomical properties of pyramidal molar and apply it to treatment and prognostic evaluation.

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Sharma, Vipul, Kirti Yadav, Indira Chaturvedi, and T. P. Chaturvedi. "An effective way of reactivation of first class appliance." APOS Trends in Orthodontics 6 (November 25, 2016): 319–21. http://dx.doi.org/10.4103/2321-1407.194791.

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First class appliance produces rapid distalization of the maxillary first and second molars, even when the second molars are completely erupted. The range of molar distalization is 4-8 mm. It has both buccal and palatal component. Here, we are going to present a technique to reactivate a broken first class appliance for effective distalization.

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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 (November 20, 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 eruption stages of maxillary second and third molars. Results: Out of the 13 initially identified articles only four fulfilled the final selection criteria. Three of the four studies showed no statistical significance in linear molar distalization based on the eruptive stage of the second and/or third molars, while one study found that the amount of distal movement of the first molars was significantly greater in the group with unerupted second molars. Only one study found that the amount of molar tipping that occurred as a result of distalization was related to the eruption stage of the maxillary molars. Similarly, three of the four studies found that molar distalization time was not significantly affected by eruption of the second or third molars. Conclusion: The effect of maxillary second and third molar eruption stage on molar distalization—both linear and angular distalization—appears to be minimal. This conclusion is only based on low–level of evidence clinical trials. The large variability in the outcomes should be considered clinically.

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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 (January 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 minimize space deficiencies and induce space closure. In addition, composite resin restorations were performed on the anterior central incisors. In the second case, a mandibular lingual arch was used to stabilize the affected teeth in order to mitigate discomfort by reducing rotational biting forces.

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Yamada, Kazuyo, Shingo Kuroda, Toru Deguchi, Teruko Takano-Yamamoto, and Takashi Yamashiro. "Distal Movement of Maxillary Molars Using Miniscrew Anchorage in the Buccal Interradicular Region." Angle Orthodontist 79, no. 1 (January 1, 2009): 78–84. http://dx.doi.org/10.2319/020408-68.1.

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Abstract Objective: To quantify the treatment effects of interradicular miniscrew anchorage and to confirm the validity of the clinical usage of interradicular miniscrews in the distal movement of maxillary molars in nonextraction treatment. Materials and Methods: Twenty-four maxillary molars were moved to the distal using miniscrews placed in the interradicular space between the second premolar and the first molar at an oblique angle of 20 to 30 degrees to the long axis of the proximal tooth. The teeth were evaluated as to how the molars were moved to the distal with the use of lateral cephalograms and dental casts. Results: Maxillary molars were moved to the distal by 2.8 mm with distal tipping of 4.8 degrees and intruded by 0.6 mm. Maxillary incisors were moved to the distal by 2.7 mm with palatal tipping of 4.3 degrees. Molar extrusion and/or consequent mandibular rotation was not observed in any patient. Conclusion: Miniscrews placed in the maxillary interradicular space provide successful molar distal movement of 2.8 mm without patient compliance and with no undesirable side effects such as incisor proclination, clockwise mandibular rotation, or root resorption.

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Kang, Ho Yeon, Hyeonjong Lee, Yong Kwon Chae, Seoung-Jin Hong, Yun Yeong Jeong, Ko Eun Lee, Mi Sun Kim, Hyo-Seol Lee, Sung Chul Choi, and Ok Hyung Nam. "Feasibility of 3-Dimensional Visual Guides for Preparing Pediatric Zirconia Crowns: An In Vitro Study." International Journal of Environmental Research and Public Health 17, no. 16 (August 8, 2020): 5732. http://dx.doi.org/10.3390/ijerph17165732.

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This study evaluated the feasibility of a tooth preparation guide for prefabricated zirconia crowns (PZCs). Three-dimensional surface data for PZCs of the left maxillary primary first molar and left mandibular primary second molar were obtained using a model scanner. The tooth preparation data were digitally designed to harmonize with the adjacent teeth on the mixed dentition model and visualized using a color-coded map, which presents the required amount of tooth reduction. Twenty participants were recruited for preparing teeth with and without using the tooth preparation guide. The following three parameters were evaluated: tooth preparation time, harmony score, and amount of tooth reduction. The preparation time when using the guide was significantly reduced (p < 0.05), and a significant difference was observed in the harmony scores for the maxillary primary first molar preparation. Furthermore, the amount of tooth reduction was significantly different for both maxillary and mandibular primary molars (p < 0.05) in terms of the occlusal distal surface and buccal line angle in the maxillary primary first molars, and the smooth surfaces, proximal surfaces, and mesial line angles in the mandibular primary second molars. Thus, the results suggest that a tooth preparation guide could facilitate better tooth preparation for PZCs.

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Mohd Nazrin Isa, Aws Hashim Ali Al-Kadhim, and Azlan Jaafar. "The Efficacy of Reciproc Blue® For Canal Cleanliness Following the Retreatment of Maxillary First Molar: In Vitro Analysis." Malaysian Journal of Science Health & Technology 7, no. 1 (March 30, 2021): 22–27. http://dx.doi.org/10.33102/mjosht.v7i1.142.

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Nonsurgical retreatment involves removing mechanical barriers such as gutta-percha to achieve proper cleaning and disinfection. The complexity of the anatomy of molar tooth gives challenge in retreatment procedure. Thus, this study evaluates the amount of residual gutta-percha after retreatment with rotary files (Reciproc Blue®) from each maxillary first molar canal using cone-beam computed tomography (CBCT) and the time required to accomplish it. Nine freshly extracted maxillary molars were instrumented and obturated. Preoperative CBCT was taken, and retreatment was done using Reciproc Blue®. CBCT was taken post retreatment, and the residual volume percentage of gutta-percha from each canal was calculated. The total retreatment time was recorded, and the data were statistically analyzed. The result shows no statistically significant difference in the amount of residual filling material in mesiobuccal, distobuccal, and palatal canal for maxillary first molar and total time used for retreatment with Reciproc Blue® system.

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Marchiori Farret, Marcel, Eduardo Martinelli S. de Lima, Vanessa Pereira Araújo, Susana Maria Deon Rizzatto, Luciane Macedo de Menezes, and Marcio Lima Grossi. "Molar Changes with Cervical Headgear Alone or in Combination with Rapid Maxillary Expansion." Angle Orthodontist 78, no. 5 (September 1, 2008): 847–51. http://dx.doi.org/10.2319/080207-360.1.

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Abstract Objective: To test the hypothesis that there is no difference in the distal movement of the maxillary first permanent molars when cervical headgear is used alone or in combination with rapid maxillary expansion. Materials and Methods: The sample was composed of 36 subjects (aged 9 to 13 years), treated in the Faculty of Dentistry, Pontifícia Universidade Cat;aaolica, Rio Grande do Sul, Brazil. The individuals were in good health and in their pubertal growth period. All had Class II division 1 malocclusion. The patients were divided into two groups: group 1 (22 subjects), Class II, with a normal transverse maxilla treated with cervical traction headgear (HG) 400 g 12 h/d, and group 2 (14 subjects), Class II maxillary transverse deficiency treated with rapid maxillary expansion plus cervical traction headgear (RME + HG). An additional group 3 (17 subjects) served as a control group and included individuals with the same characteristics. All subjects had two lateral cephalograms: initial (T1) and progress (T2), taken 6 months later. Differences between T1 and T2 were compared with the Student's t-test, and three groups were compared by the analysis of variance and Tukey multiple comparison test. Results: Results showed greater distal tipping and greater distal movement of the first permanent molars in group 1 (HG) than in group 2 (RME + HG), P < .05. No extrusion of first permanent molar occurred in either group (P > .05). Conclusion: The hypothesis was rejected. Cervical traction headgear alone produced greater distal movement effects in maxillary first permanent molars when compared with rapid maxillary expansion associated with cervical headgear.

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Di Venere, Daniela, Alessandra Laforgia, Paola Lorusso, Saverio Capodiferro, and Massimo Corsalini. "Ectopic Eruption of the First Permanent Molar in the Maxilla: Cephalometric Features of 13 Pediatric Patients." Applied Sciences 11, no. 17 (August 26, 2021): 7869. http://dx.doi.org/10.3390/app11177869.

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Ectopic eruption of the first permanent molar in the maxilla, generally characterized by the wrong axial positioning during eruption, is reported to occur in about 2–6% of children. Its incidence is surely under-estimated as it frequently remains undiagnosed and, additionally, becomes irreversible, resulting in posterior crowding in such cases. This retrospective study aims to investigate the cephalometric features of patients affected by ectopic eruption of the maxillary first molar in comparison to a control group of patients. From a total of 1935 subjects, 13 patients were enrolled in the study group, while 26 patients were randomly selected as a control group. Lateral cephalometric teleradiographs obtained at the time of diagnosis were used to measure cephalometric values between study patients and controls. The prevalence of ectopic eruption of the first maxillary permanent molar in our patients was 1.14%. The mandibular angle (SN-GoMe) was found to be significantly greater in the study group than in control. The same statistical trend was observed for the inter-maxillary angle (SnaSnp-GoMe); also, the distance Sna-Me was greater in the study group. Differences between groups were statistically significant for the following distances: Snp-Sna, Ba-S and SOR-Sna, which were found to be, overall, greater in the study group. Ectopic eruption of the first permanent molar in the maxilla seems to be associated with morphogenetic characteristics of patients, mainly with a dolichocephalic pattern.

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Lombardo, Luca, Giulia Occhiuto, Emanuele Paoletto, Bortolo Giuliano Maino, and Giuseppe Siciliani. "Class II treatment by palatal miniscrew-system appliance: A case report." Angle Orthodontist 90, no. 2 (March 12, 2019): 305–13. http://dx.doi.org/10.2319/080218-559.1.

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ABSTRACT This case shows that using a rapid palatal expander (RPE) and then a pendulum appliance anchored to palatal miniscrews is an option for improving treatment management in a noncompliant patient requiring maxillary expansion and molar distalization in the late mixed dentition. First, an RPE was used to expand the maxillary arch. Then, a modified pendulum appliance was used to distalize the maxillary first permanent molars. Optimal positioning of two palatal miniscrews enabled both appliances to be supported by skeletal anchorage. Treatment was finished using multibracket fixed appliances, and after 2 years, skeletal Class I as well as dental Class I canine and molar relationships were achieved.

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Journal articles on the topic 'Maxillary first molar'

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