scholarly journals Supernumerary Teeth from Two Mesoamerican Archaeological Contexts

2018 ◽  
Vol 22 (2) ◽  
pp. 39-46 ◽  
Author(s):  
William N. Duncan
Keyword(s):  
Biological Distance ◽  
Supernumerary Teeth ◽  
Supernumerary Tooth ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
First Case ◽  
Postclassic Maya ◽  
Mandibular Teeth ◽  
Mode Of Inheritance

Supernumerary teeth are uncommon but have been well documented clinically. The majority of cases are isolated anterior teeth; examples of multiple or posterior supernumerary teeth are less common. This paper describes two examples of supernumerary teeth from archaeological contexts in Mesoamerica. The first case is of three individuals with supernumerary posterior teeth found in skull rows and pairs in a Postclassic Maya temple at the site of Ixlú in northern Guatemala. Two of these individuals exhibited bilateral supernumerary mandibular teeth. The second context is a Zapotec burial from the Jalieza site in Oaxaca, Mexico. This individual exhibited a single supernumerary tooth. The paper reviews supernumerary teeth with regard to frequency, ontogeny, and mode of inheritance and discusses the cases’ relevance for biological distance analyses.

scholarly journals Dental Anomalies’ Characteristics

Diagnostics ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1161
Author(s):  
Tatiana Sella Tunis ◽  
Ofer Sarne ◽  
Israel Hershkovitz ◽  
Tamar Finkelstein ◽  
Aikaterini Maria Pavlidi ◽  
...  
Keyword(s):  
Dental Anomalies ◽  
Supernumerary Teeth ◽  
Missing Teeth ◽  
Chi Square ◽  
Posterior Teeth ◽  
Development Patterns ◽  
Anterior Teeth ◽  
Chi Square Test ◽  
History Of ◽  
Maxillary Lateral Incisor

The aim of this study was to characterize dental anomalies. The pretreatment records (photographs and radiographs) of 2897 patients (41.4% males and 58.6% females) were utilized to detect dental anomalies. The dental anomalies studied were related to number, size and shape, position, and eruption. A Chi-square test was carried out to detect associations between dental anomalies, jaw, and sex. A total of 1041 (36%) of the subjects manifested at least one dental anomaly. The prevalence of all dental anomalies was jaw-dependent and greater in the maxilla, except for submerged and transmigrated teeth. The most frequently missing teeth were the maxillary lateral incisor (62.3%) and the mandibular second premolars (60.6%). The most frequent supernumerary teeth were the incisors in the maxilla (97%) and the first premolars in the mandible (43%). Dental anomalies are more frequent in the maxilla and mainly involve the anterior teeth; in the mandible, however, it is the posterior teeth. These differences can be attributed to the evolutionary history of the jaws and their diverse development patterns.

scholarly journals Bilateral tuberculate supernumerary teeth

2011 ◽  
Vol 1 (2) ◽  
pp. 30 ◽  
Author(s):  
Joycelyn Odegua Eigbobo ◽  
Babatope Bamidele Osagbemiro
Keyword(s):  
Dental Arch ◽  
Supernumerary Teeth ◽  
Supernumerary Tooth ◽  
Anterior Teeth ◽  
Normal Series ◽  
Maxillary Region

Supernumerary teeth are teeth in excess of the normal series occurring in any region of the dental arch. They are located mostly in the anterior maxillary region and are classified according to their location and morphology. The tuberculate type of supernumerary tooth possesses more than one cusp or tubercle (barrel shaped). It is rare to find bilateral tuberculate supernumerary teeth in the premaxillary region and when found they rarely erupt. This report describes a 13-year-old boy with erupted palatally placed bilateral tuberculate supernumerary teeth. The presence of these supernumerary teeth led to the labial displacement and rotations of the anterior maxillary teeth. The treatment involved extraction of the supernumerary teeth and a referral for orthodontic management of the crowding, displacement and rotations. The occurrence of erupted palatally placed tuberculate anterior teeth in this case is a rare experience. However, the associated orthodontic problems are within familiar spectrum.

Mastication

2013 ◽  
Author(s):  
Martin E. Atkinson
Keyword(s):  
Occlusal Plane ◽  
Dental Arch ◽  
Posterior Teeth ◽  
Maxillary Molars ◽  
Anterior Teeth ◽  
Occlusal Surfaces ◽  
Mandibular Teeth ◽  
Maxilla And Mandible ◽  
Dynamic Relationships ◽  
Muscles Of Mastication

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.

scholarly journals Radiographic Follow-Up during Orthodontic Treatment for Early Diagnosis of Sequential Supernumerary Teeth

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Selma Sano Suga ◽  
Paula de Castro Kruly ◽  
Talissa Mayer Garrido ◽  
Marise Sano Suga Matumoto ◽  
Uhana Seifert Guimarães Suga ◽  
...  
Keyword(s):  
Early Diagnosis ◽  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Supernumerary Teeth ◽  
Supernumerary Tooth ◽  
Sequential Development ◽  
First Case ◽  
Mandibular Region ◽  
The Right

Most supernumerary teeth are impacted and asymptomatic.Objective.The aim of this paper is to describe two cases of sequential development of supernumerary teeth in the mandibular premolar region, identified during orthodontic treatment.Reports.The first case describes the radiographic follow-up of a female patient that presented a supernumerary tooth at the age of 9 years and 10 months in the right mandibular premolar region, followed by a further supernumerary tooth in the left mandibular premolar region identified at the age of 11 years and 3 months. In the second case, the radiographic follow-up of a male patient demonstrated 3 supernumerary teeth in the premolar region at the age of 16 years. During orthognathic surgery planning at the age of 20 years and 5 months, a supplemental supernumerary tooth was found in the left mandibular region.Conclusion.Considering the late developing of supernumerary premolars, appropriate follow-up with panoramic radiographs of patients with previous experience of supernumerary teeth is essential for early diagnosis of supplemental premolars to prevent possible complications.

scholarly journals Aesthetic-Functional Fixed Appliance as Treatment of Premature Loss of primary Anterior Teeth

2019 ◽  
Vol 21 (5) ◽  
pp. 454-458
Author(s):  
Priscila Vieira Da Silva ◽  
Juliana Severino Lupinetti Noberto ◽  
Ariane Barbosa Rodrigues Del Papa ◽  
Cíntia Aparecida Damo Simões ◽  
Sandrine Bittencourt Berger ◽  
...  
Keyword(s):  
Clinical Examination ◽  
Primary Teeth ◽  
Treatment Plan ◽  
Pediatric Dentistry ◽  
Posterior Teeth ◽  
Early Loss ◽  
Anterior Teeth ◽  
First Case ◽  
Space Maintainer ◽  
Fixed Space

Abstract The early loss of anterior primary teeth is frequent in the pediatric dentistry clinic and it is associated with extensive caries or dental trauma. The purpose of this study was to report two cases of aesthetic-functional rehabilitation due to early loss of anterior primary teeth, with the aid of fixed space maintainers of the tube-bar type. In the first case, a 4-year-old female child referred for dental treatment is reported. During clinical examination, several restorations in the posterior teeth and absent upper anterior teeth were observed. The treatment plan consisted of installing a tube-bar type upper fixed space maintainer, considering the ease of installation and adaptation for young children. The second case reports a 5-year-old male patient with the main complaint of dental caries. Clinical examination revealed extensive coronary destruction in the upper central incisors, as well as in the posterior teeth that presented carious lesions in several teeth. For the case planning, it was determined the need for  the posterior teeth restorations and the exodontia of the anterior dental remnants. After oral rehabilitation, an aesthetic-functional space maintainer of the tube-bar type was made and installed. In both cases, prosthetic rehabilitation was fundamental to maintain the space until the eruption of the permanent successors, avoiding future damages, as well as to restore the children's self-esteem and introversion  behavior. Keywords: Deciduous. Space maintenance. Mouth rehabilitation.  Resumo A perda precoce dos dentes decíduos anteriores é frequente na clínica odontopediátrica e está associada a processos de cáries extensas ou traumas dentários. O objetivo do presente estudo foi relatar dois casos clínicos de reabilitação estético-funcional após perda precoce de dentes decíduos anteriores, com auxílio de mantenedores de espaço fixo do tipo tubo-barra. O primeiro caso refere-se a uma criança do sexo feminino, quatro anos de idade, encaminhada para atendimento odontológico. Durante exame clínico, observou-se restaurações nos dentes posteriores e ausência dos dentes anteriores superiores. O plano de tratamento consistiu na instalação de um mantenedor de espaço fixo superior do tipo tubo-barra, levando em consideração a facilidade de instalação e adaptação para crianças com pouca idade. O segundo caso reporta um paciente de sexo masculino, cinco anos de idade, tendo como queixa principal a presença de cáries dentárias. Ao exame clínico, foi notado extensas destruições coronárias nos incisivos centrais superiores, assim como nos dentes posteriores. Para o planejamento do caso, determinou-se a necessidade de restaurações dos dentes posteriores e as exodontia dos remanescentes dentários anteriores. Após adequação do meio bucal foi confeccionado e instalado um mantenedor de espaço estético-funcional do tipo tubo-barra. Em ambos os casos, a reabilitação protética foi fundamental para a manutenção do espaço até a irrupção dos sucessores permanentes, evitando prejuízos futuros, devolvendo a autoestima e a mudança do comportamento de introversão das crianças.  Palavras-chave: Dente decíduo. Reabilitação bucal. Mantenedor de espaço em ortodontia.

scholarly journals Dental health status of skeletal remains excavated from an abandoned well at Ajnala, India: a bioarchaeological study

2018 ◽  
Vol 81 (3) ◽  
pp. 307-324 ◽  
Author(s):  
Jagmahender Singh Sehrawat ◽  
Monika Singh
Keyword(s):  
Health Status ◽  
Dental Caries ◽  
Dental Health ◽  
Skeletal Remains ◽  
Pathological State ◽  
Adult Males ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Mandibular Teeth ◽  
Dental Health Status

Abstract Present study was conducted to assess dental health status of the mid-19th century skeletal remains excavated from an abandoned ancient well and to scrutinize the demographic affiliations of the remains. Thousands of bones, teeth and contextual items were excavated non-scientifically from an abandoned well situated underneath a religious structure at Ajnala (Amritsar, India). Four thousands four hundred and seventy five teeth of each type were examined for presence of dental pathologies of caries, wear and linear enamel hypoplasia (LEH). The frequency distribution of each pathological state was calculated for each tooth type using international dental standards available in the literature. The overall dental status was characteristic of young individuals having low prevalence of dental caries and enamel hypoplasiac lesions. Very few teeth had seriously exposed dentine and pulp cavity; indicating consumption of some cariogenic food items. The maxillary and posterior teeth were more affected with dental caries than the mandibular and anterior teeth. LEH defects were found more commonly distributed in the lower canines (44.9%) and upper incisors (34.8%) than their corresponding counterparts and statistically significant differences were noticed in LEH prevalence between anterior and, posterior dentition. The overall percentage of LEH has been found as 15.8%; with 15.4% maxillary and 16.2% mandibular teeth being affected with LEH. The paleodontogical examinations, contextual items and the preliminary molecular findings supported the written versions that victims of Ajnala skeletal remains had sound dental health status and probably belonged to adult males who were killed in 1857 as per written versions.

scholarly journals Joined supernumerary mandibular teeth in the premolar region: Report of a Hungarian archeological case

2018 ◽  
Vol 22 (1) ◽  
pp. 18-21
Author(s):  
Gy. Szabó ◽  
G. Kocsis S. ◽  
E. Molnár
Keyword(s):  
Tooth Germ ◽  
Dental Arch ◽  
Dental Anomalies ◽  
Supernumerary Teeth ◽  
Supernumerary Tooth ◽  
Burial Site ◽  
Fused Teeth ◽  
History Of ◽  
Mandibular Teeth ◽  
Labial Surface

Supernumerary teeth are those that are additional to the normal complement. They may occur in any region of the dental arch and have been reported in both the primary and the permanent dentitions. The etiology of supernumerary teeth is still not clearly understood, but several theories have been suggested for their occurrence. The investigated material were the remains from the Bácsalmás-Óalmás burial site (from the 16th-17th centuries), where 472 skeletons were excavated from 1993 to 2003. For the purpose of this study, the dentitions of 164 adult individuals were examined. The examination was carried out using macromorphological methods, radiographic analysis and a dial caliper were applied. This paper describes a supernumerary tooth of an adult female skeleton. On the labial surface of the first mandibular premolar an extra tooth was observed.Radiographic examination of the fused teeth indicated that the crown of the premolar had fused incompletely with the crown of the extra tooth. The position of the extra tooth could have been the result of gemination of the tooth germ or the elaboration of the buccal cingulum. The cranium of the examined individual showed some mongoloid morphologic features, too. Our presumption about the formation of the supernumerary tooth may have contributed to the theories of the occurrence of supernumeraries. The sporadic occurrence of this anomaly was reported in recent and archaeological skeletal collections. This study showed that multiple permanent dental formation was present in past Hungarian populations, representing a contribution to the history of dental anomalies.

scholarly journals Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Youn-Gyeong Moon ◽  
Kyung-Min Lee
Keyword(s):  
Third Molar ◽  
Careful Consideration ◽  
Missing Teeth ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Posterior Quadrant ◽  
Left Posterior ◽  
The Right ◽  
Best Fit ◽  
Posterior Area

Abstract Objective To compare the accuracy of complete-arch scans and quadrant scans obtained using a direct chairside intraoral scanner. Material and methods Intraoral scans were obtained from 20 adults without missing teeth except for the third molar. Maxillary and mandibular complete-arch scans were carried out, and 4 quadrant scans for each arch were performed to obtain right posterior, right anterior, left anterior, and left posterior quadrant scans. Complete-arch scans and quadrant scans were compared with corresponding model scans using best-fit surface-based registration. Shell/shell deviations were computed for complete-arch scans and quadrant scans and compared between the complete-arch scans and each quadrant scans. In addition, shell/shell deviations were calculated also for each individual tooth in complete-arch scans to evaluate factors which influence the accuracy of intraoral scans. Results Complete-arch scans showed relatively greater errors (0.09 ~ 0.10 mm) when compared to quadrant scans (0.05 ~ 0.06 mm). The errors were greater in the maxillary scans than in the mandibular scans. The evaluation of errors for each tooth showed that the errors were greater in posterior teeth than in anterior teeth. Comparing the right and left errors, the right side posterior teeth showed a more substantial variance than the left side in the mandibular scans. Conclusion The scanning accuracy has a difference between complete-arch scanning and quadrant scanning, particularly in the posterior teeth. Careful consideration is needed to avoid scanning inaccuracy for maxillary or mandibular complete-arch, particularly in the posterior area because a complete-arch scan might have potential error than a quadrant scan.

scholarly journals Dual-section versus conventional archwire for en-masse retraction of anterior teeth with direct skeletal anchorage: a finite element analysis

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ryo Hamanaka ◽  
Daniele Cantarella ◽  
Luca Lombardo ◽  
Lorena Karanxha ◽  
Massimo Del Fabbro ◽  
...  
Keyword(s):  
Finite Element ◽  
Tooth Movement ◽  
Occlusal Plane ◽  
Skeletal Anchorage ◽  
Element Analysis ◽  
Posterior Teeth ◽  
Posterior Portion ◽  
Anterior Teeth ◽  
Retraction Force ◽  
En Masse Retraction

Abstract Background The aim of this study is to compare the biomechanical effects of the conventional 0.019 × 0.025-in stainless steel archwire with the dual-section archwire when en-masse retraction is performed with sliding mechanics and skeletal anchorage. Methods Models of maxillary dentition equipped with the 0.019 × 0.025-in archwire and the dual-section archwire, whose anterior portion is 0.021 × 0.025-in and posterior portion is 0.018 × 0.025-in were constructed. Then, long-term tooth movement during en-masse retraction was simulated using the finite element method. Power arms of 8, 10, 12 and 14 mm length were employed to control anterior torque, and retraction forces of 2 N were applied with a direct skeletal anchorage. Results For achieving bodily movement of the incisors, power arms longer than 14 mm were required for the 0.019 × 0.025-in archwire, while between 8 and 10 mm for the dual-section archwire. The longer the power arms, the greater the counter-clockwise rotation of the occlusal plane was produced. Frictional resistance generated between the archwire and brackets and tubes on the posterior teeth was smaller than 5% of the retraction force of 2 N. Conclusions The use of dual-section archwire might bring some biomechanical advantages as it allows to apply retraction force at a considerable lower height, and with a reduced occlusal plane rotation, compared to the conventional archwire. Clinical studies are needed to confirm the present results.

Stress Study of Removable Partial Denture with Attachments Using Finite Element Analysis

2014 ◽  
Vol 658 ◽  
pp. 389-394
Author(s):  
Oana Cella Andrei ◽  
Livia Alice Tanasescu ◽  
Ruxandra Margarit ◽  
Mircea Horia Tierean
Keyword(s):  
3D Model ◽  
Sagittal Plane ◽  
Simulation Software ◽  
Von Mises Stress ◽  
Removable Partial Denture ◽  
Maximum Displacement ◽  
Partial Denture ◽  
Rotational Movement ◽  
Anterior Teeth ◽  
First Case

The paper presents the study of the stresses and the displacements that appear in different areas of the removable partial denture (RPD) with extracoronal attachments under occlusal loading, using FEA. The first step was to create the 3D model of a RPD with ball attachments in case of a class I Kennedy edentulous patient with all six anterior teeth as abutments. All materials were considered homogeneous, isotropic and having linear elasticity. There were assumed two types of constraints: in the first one the model is fixed under the action of the mastication forces; in the second one the rotational movement of the denture’s saddles in the sagittal plane was simulated, towards the edentulous ridge. In the first case, the 3D model and FEA were developed using Autodesk Inventor 2013 software. In the second case, the FEA was done using Autodesk Algor Simulation software. The loading of the model was symmetrically applied, considering the magnitude of the tangential and normal oral forces determined by Las Casas et al. These forces were applied to all the PM1, PM2, M1 and M2 pairs. Each loading case was analysed separately. The results of the two constrain situations are presented graphically, comparatively and show that the amount of the saddle displacement depends on the application area of the mastication force. Maximum displacement was computed at the application of the mastication forces on the M2 and decreases as the force is applied more mesial. The amount of the major connector’s deformation is very little influenced by the site of the force. The largest displacement of the denture was recorded at the distal end of the saddle, with values ​​that depend on the site of the forces. The existence of the rotational movement of the denture’s free end saddles in the sagittal plane, towards the edentulous ridge, changes the values ​​of accumulated stresses in denture during mastication and its Von Mises stress peaks. This analysis can be use to establish the principles of planning and designing the RPD with ball attachments having in mind to minimize the number of repairs caused by fractures of the components.

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