GLOSSARY of DENTAL TERMS a Abscess: Acute Or Chronic
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Maxillary Lateral Incisor Agenesis and Its Relationship to Overall Tooth Size Jane Wright, DDS, MS,A Jose A
RESEARCH AND EDUCATION Maxillary lateral incisor agenesis and its relationship to overall tooth size Jane Wright, DDS, MS,a Jose A. Bosio, BDS, MS,b Jang-Ching Chou, DDS, MS,c and Shuying S. Jiang, MSd Prosthodontists, orthodontists, ABSTRACT and general dentists frequently fi Statement of problem. Agenesis of the maxillary lateral incisor has been linked to differences in encounter dif culties when the size of the remaining teeth. Thus, the mesiodistal space required for definitive esthetic resto- attempting to restore the oc- ration in patients with missing maxillary lateral incisors may be reduced. clusion if unilateral or bilateral Purpose. The purpose of this study was to determine whether a tooth size discrepancy exists in maxillary lateral incisors are orthodontic patients with agenesis of one or both maxillary lateral incisors. congenitally missing. Restora- tion of the missing lateral Material and methods. Forty sets of dental casts from orthodontic patients (19 men and 21 women; mean 15.9 years of age; all of European origin) were collected. All casts had agenesis of one incisor using an implant- or both maxillary lateral incisors. Teeth were measured with a digital caliper at their greatest supported crown, a partial mesiodistal width and then compared with those of a control group matched for ethnicity, age, and fi xed dental prosthesis, or sex. Four-factor ANOVA with repeated measures of 2 factors was used for statistical analysis (a=.05). mesial movement of the Results. Orthodontic patients with agenesis of one or both maxillary lateral incisors exhibited canine are treatment options. smaller than normal tooth size compared with the control group. -
Tooth Size Proportions Useful in Early Diagnosis
#63 Ortho-Tain, Inc. 1-800-541-6612 Tooth Size Proportions Useful In Early Diagnosis As the permanent incisors begin to erupt starting with the lower central, it becomes helpful to predict the sizes of the other upper and lower adult incisors to determine the required space necessary for straightness. Although there are variations in the mesio-distal widths of the teeth in any individual when proportions are used, the sizes of the unerupted permanent teeth can at least be fairly accurately pre-determined from the mesio-distal measurements obtained from the measurements of already erupted permanent teeth. As the mandibular permanent central breaks tissue, a mesio-distal measurement of the tooth is taken. The size of the lower adult lateral is obtained by adding 0.5 mm.. to the lower central size (see a). (a) Width of lower lateral = m-d width of lower central + 0.5 mm. The sizes of the upper incisors then become important as well. The upper permanent central is 3.25 mm.. wider than the lower central (see b). (b) Size of upper central = m-d width of lower central + 3.25 mm. The size of the upper lateral is 2.0 mm. smaller mesio-distally than the maxillary central (see c), and 1.25 mm. larger than the lower central (see d). (c) Size of upper lateral = m-d width of upper central - 2.0 mm. (d) Size of upper lateral = m-d width of lower central + 1.25 mm. The combined mesio-distal widths of the lower four adult incisors are four times the width of the mandibular central plus 1.0 mm. -
Dental Anatomy Lecture (8) د
Dental Anatomy Lecture (8) د. حسين احمد Permanent Maxillary Premolars The maxillary premolars are four in number: two in the right and two in the left. They are posterior to the canines and anterior to the molars. The maxillary premolars have shorter crowns and shorter roots than those of the maxillary canines. The maxillary first premolar is larger than the maxillary second premolar. Premolars are named so because they are anterior to molars in permanent dentition. They succeed the deciduous molars (there are no premolars in deciduous dentition). They are also called “bicuspid -having two cusps-“, but this name is not widely used because the mandibular first premolar has one functional cusp. The premolars are intermediate between molars and canines in: Form: The labial aspect of the canine and the buccal aspect of premolar are similar. Function: The canine is used to tear food while the premolars and molars are used to grind it. Position: The premolars are in the center of the dental arch. [Type a quote from the document or the summary of [Type a quote from the document or the summary of an interesting point. You can position the text box an interesting point. You can anywhere in the document. position the text box Use the Text Box Tools tab to anywhere in the document. change the formatting of the Use the Text Box Tools tab to Some characteristic features to all posterior teeth: 1. Greater relative facio-lingual measurement as compared with the mesio-distal measurement. 2. Broader contact areas. 3. Contact areas nearly at the same level. -
Maxillary Premolars
Maxillary Premolars Dr Preeti Sharma Reader Oral & Maxillofacial Pathology SDC Dr. Preeti Sharma, Subharti Dental College, SVSU Premolars are so named because they are anterior to molars in permanent dentition. They succeed the deciduous molars. Also called bicuspid teeth. They develop from the same number of lobes as anteriors i.e., four. The primary difference is the well-formed lingual cusp developed from the lingual lobe. The lingual lobe is represented by cingulum in anterior teeth. Dr. Preeti Sharma, Subharti Dental College, SVSU The buccal cusp of maxillary first premolar is long and sharp assisting the canine as a prehensile or tearing teeth. The second premolars have cusps less sharp and function as grinding teeth like molars. The crown and root of maxillary premolar are shorter than those of maxillary canines. The crowns are little longer and roots equal to those of molars. Dr. Preeti Sharma, Subharti Dental College, SVSU As the cusps develop buccally and lingually, the marginal ridges are a little part of the occlusal surface of the crown. Dr. Preeti Sharma, Subharti Dental College, SVSU Maxillary second premolar Dr. Preeti Sharma, Subharti Dental College, SVSU Maxillary First Premolar Dr Preeti Sharma Reader Oral Pathology SDC Dr. Preeti Sharma, Subharti Dental College, SVSU The maxillary first premolar has two cusps, buccal and lingual. The buccal cusp is about 1mm longer than the lingual cusp. The crown is angular and buccal line angles are more prominent. The crown is shorter than the canine by 1.5 to 2mm on an average. The premolar resembles a canine from buccal aspect. -
Study of Root Canal Anatomy in Human Permanent Teeth
Brazilian Dental Journal (2015) 26(5): 530-536 ISSN 0103-6440 http://dx.doi.org/10.1590/0103-6440201302448 1Department of Stomatologic Study of Root Canal Anatomy in Human Sciences, UFG - Federal University of Goiás, Goiânia, GO, Brazil Permanent Teeth in A Subpopulation 2Department of Radiology, School of Dentistry, UNIC - University of Brazil’s Center Region Using Cone- of Cuiabá, Cuiabá, MT, Brazil 3Department of Restorative Dentistry, School of Dentistry of Ribeirão Beam Computed Tomography - Part 1 Preto, USP - University of São Paulo, Ribeirão Preto, SP, Brazil Carlos Estrela1, Mike R. Bueno2, Gabriela S. Couto1, Luiz Eduardo G Rabelo1, Correspondence: Prof. Dr. Carlos 1 3 3 Estrela, Praça Universitária s/n, Setor Ana Helena G. Alencar , Ricardo Gariba Silva ,Jesus Djalma Pécora ,Manoel Universitário, 74605-220 Goiânia, 3 Damião Sousa-Neto GO, Brasil. Tel.: +55-62-3209-6254. e-mail: [email protected] The aim of this study was to evaluate the frequency of roots, root canals and apical foramina in human permanent teeth using cone beam computed tomography (CBCT). CBCT images of 1,400 teeth from database previously evaluated were used to determine the frequency of number of roots, root canals and apical foramina. All teeth were evaluated by preview of the planes sagittal, axial, and coronal. Navigation in axial slices of 0.1 mm/0.1 mm followed the coronal to apical direction, as well as the apical to coronal direction. Two examiners assessed all CBCT images. Statistical data were analyzed including frequency distribution and cross-tabulation. The highest frequency of four root canals and four apical foramina was found in maxillary first molars (76%, 33%, respectively), followed by maxillary second molars (41%, 25%, respectively). -
The All-On-Four Treatment Concept: Systematic Review
J Clin Exp Dent. 2017;9(3):e474-88. All-on-four: Systematic review Journal section: Prosthetic Dentistry doi:10.4317/jced.53613 Publication Types: Review http://dx.doi.org/10.4317/jced.53613 The all-on-four treatment concept: Systematic review David Soto-Peñaloza 1, Regino Zaragozí-Alonso 2, María Peñarrocha-Diago 3, Miguel Peñarrocha-Diago 4 1 Collaborating Lecturer, Master in Oral Surgery and Implant Dentistry, Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, Spain Peruvian Army Officer, Stomatology Department, Luis Arias Schreiber-Central Military Hospital, Lima-Perú 2 Dentist, Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, Spain 3 Assistant Professor of Oral Surgery, Stomatology Department, Faculty of Medicine and Dentistry, University of Valencia, Spain 4 Professor and Chairman of Oral Surgery, Stomatology Department, Faculty of Medicine and Dentistry, University of Valencia, Spain Correspondence: Unidad de Cirugía Bucal Facultat de Medicina i Odontologìa Universitat de València Gascó Oliag 1 46010 - Valencia, Spain [email protected] Soto-Peñaloza D, Zaragozí-Alonso R, Peñarrocha-Diago MA, Peñarro- cha-Diago M. The all-on-four treatment concept: Systematic review. J Clin Exp Dent. 2017;9(3):e474-88. http://www.medicinaoral.com/odo/volumenes/v9i3/jcedv9i3p474.pdf Received: 17/11/2016 Accepted: 16/12/2016 Article Number: 53613 http://www.medicinaoral.com/odo/indice.htm © Medicina Oral S. L. C.I.F. B 96689336 - eISSN: 1989-5488 eMail: [email protected] Indexed in: Pubmed Pubmed Central® (PMC) Scopus DOI® System Abstract Objectives: To systematically review the literature on the “all-on-four” treatment concept regarding its indications, surgical procedures, prosthetic protocols and technical and biological complications after at least three years in function. -
Arrangement of Posterior Teeth
Lecture 14 PROSTHODONTICS Dr. Firas Abdulameer Arrangement of Posterior Teeth Correct placement of posterior teeth is important for the mastication ability, retention and stability of both dentures. Prior to arrangement of the posterior teeth, we must understand some of the following definitions, which is related to posterior teeth arrangement Curve of Spee: It is imaginary line represent the anterio-posterior curvature of the occlusal surfaces of teeth beginning at the tip of mandibular canine and following the buccal cusps of premolars and molars continuing to the anterior border of the ramus of the mandible. The correct orientation of occlusal plane will optimize esthetic, function and occlusal balance. Christensen’s phenomenon: A space created at posterior area produced in the natural dentition or between the opposing posterior parts of occlusal rims when protruded the mandible (Posterior open bite). In order to compensate this posterior open bite during forward or protrusive movement of mandibular the compensatory curve should be made. Lecture 14 PROSTHODONTICS Dr. Firas Abdulameer Compensating curve: The anterio-posterior and mediolateral curvature which produce during lateral movement of mandibular jaw in the alignment of the occluding surfaces and incisal edges of artificial teeth. This curve is used to develop balanced occlusion. Determined by inclination of posterior teeth and their vertical relationship to occlusal plane and there are two curve: 1- Anteroposterior compensating curve 2- Mediolateral compensating curve Curve of Wilson (Lateral curve): It is a part of the compensating curve extend mesio-laterally from one side of the arch to the other side. This curve compensate the opening that occur when a lateral movement of mandibular jaw is made. -
Aging White-Tailed Deer by Tooth Wear and Replacement
Aging White-tailed deer by tooth wear and replacement Aging Characteristics • Physical Characteristics • Antler Size • Number of points not correlated with age • Body size and shape • Neck • Waist • Back • Behavior • Tooth wear and replacement- Harvested Deer Age Classes Born in May and June Fall harvest 6 months- fawn 1.5 yrs- yearling 2.5 yrs 3.5 yrs 4.5 yrs 5.5 yrs 6.5 yrs Tooth Wear The amount of visible dentine is an important factor in determining the age. The tooth wear and replacement method is not 100% accurate however, due to the differences in habitat. Tooth wear on a farmland deer may not be as fast as that of a deep woods buck. Severinghaus (1949) aging method Focus on lower jaw bone Adult deer 3 premolars and 3 molars 6 Months 4 teeth showing. 3rd premolar has three cusps 1.5 yrs •6 teeth •Third premolar •Third molar (last tooth) may still be erupting •Cusps of molars have sharp points. •Inset: Extremely worn third premolar may fool people into thinking deer is older. Actually, this tooth is lost after 1-1/2; years and replaced with a permanent two-cusped premolar. 2.5 yrs •Teeth are permanent •On the first molar (4th tooth) the cusps are sharp • Enamel > dentine • Third cusp (back cusp) of sixth tooth (third molar) is sharp. 3.5 yrs •Cusps show some wear •Dentine now thicker than enamel on cusp of fourth tooth (first molar). •Dentine of fifth tooth (second molar) usually not as wide as enamel. •Back cusp is flattened. 4.5 yrs •Cusp of fourth tooth (first molar) is gone. -
Frequency of Cusp of Carabelli in Orthodontic Patients Reporting to Islamabad Dental Hospital
ORIGINAL ARTICLE POJ 2016:8(2) 85-88 Frequency of cusp of carabelli in orthodontic patients reporting to Islamabad Dental Hospital Maham Niazia, Yasna Najmib, Muhammad Mansoor Qadric Abstract Introduction: Anatomic variation in the anatomy of maxillary molars can have clinical implications in dentistry ranging from predisposition to dental caries or loosely fitting orthodontic bands. The aim of this study was to determine the frequency of cusp of carabelli in permanent first molars of patients reporting to the Orthodontic department. Material and Methods: A total of 698 patients reporting to the Orthodontic Department, Islamabad Dental Hospital, were evaluated from their orthodontic records. Upper occlusal photographs and dental casts of these patients comprised the data. Results: 245 (35.1%) patients showed the presence of the cusp while 453 (64.9%) had no accessory cusp present. Larger proportion of females had cusp of carabelli when compared with males. Bilateralism was found in 75.1% subjects while unilateralism existed in 24.9%, both being higher in females. Among the unilateral cases, higher trend was observed on the right side then the left. Conclusions: It was concluded that the frequency of cusp of carabelli was less in a population sample of Islamabad than other Asian samples, but an opposite trend was seen when compared to a population sample of Khyber Phukhtunkhwa showing different prevalence rates in different ethnicities. Keywords: Cusp of carabelli; maxillary first molars; caries; orthodontic patients Introduction unilaterally or bilaterally. However it he Cusp of Carabelli is a small additional generally appears bilaterally5 but Hirakawa T cusp which is situated on the mesio- and Dietz found ‘rare’ unilateral cases.6 Its palatal surface of first maxillary molars and size varies from being the largest cusp of the tooth to a rudimentary elevation. -
Molar-Incisor Hypomineralization and Delayed Tooth Eruption
Winter 2017, Volume 6, Number 4 Case Report: Mandibular Talon Cusp Associated With Molar-Incisor Hypomineralization and Delayed Tooth Eruption ٭Katayoun Salem1 , Fatemeh Moazami2, Seyede Niloofar Banijamali3 1. Assistant Professor, Department of Pediatric Dentistry, Dental Branch of Tehran, Islamic Azad University, Tehran, Iran. 2. Pedodontist, Tehran, Iran. 3. Postgraduate Student, Department of Pediatric Dentistry, Dental Branch of Tehran, Islamic Azad University, Tehran, Iran. Use your device to scan and read the article online Citation: Salem K, Moazami F, Banijamali SN. Mandibular Talon Cusp Associated With Molar-Incisor Hypomineralization and Delayed Tooth Eruption. Journal of Dentomaxillofacial Radiology, Pathology and Surgery. 2017; 6(4):141-145. : http://dx.doi.org/10.32598/3dj.6.4.141 Funding: See Page 144 Copyright: The Author(s) A B S T R A C T Talon cusp is an odontogenic anomaly in anterior teeth, caused by hyperactivity of enamel Article info: in morphodifferentiation stage. Talon cusp is an additional cusp with several types based on Received: 25 Aug 2017 its extension and shape. It has enamel, dentin, and sometimes pulp tissue. Moreover, it can Accepted: 20 Nov 2017 cause clinical problems such as poor aesthetic, dental caries, attrition, occlusal interferences, Available Online: 01 Dec 2017 and periodontal diseases. Therefore, early diagnosis and effective treatment of talon cusp are essential. Maxillary incisors are the most commonly affected teeth. However, occurrence of mandibular talon cusp is a rare entity. We report a talon cusp in the lingual surface of the permanent mandibular left central incisor, in a 7-year-old Iranian boy. To our knowledge it is Keywords: the third case reported in Iranian patients. -
It Is the Placement of Teeth on a Denture with Definite Objective in Mind, Or It Is the Setting of Teeth on Temporary Bases
It is the placement of teeth on a denture with definite objective in mind, or it is the setting of teeth on temporary bases. A line is drawn parallel to the frontal plane that passes through the incisive papilla, aids in the positioning of the upper central incisors. The midline follows the mid palatine raphe and bisects the incisive papilla; this line is perpendicular to first line. The canine eminence lines are recorded on the cast where they are present. Figure (9-1): Guide lines of the maxillary cast. A line is drawn parallel to the frontal plane bisecting the residual ridge, aids in positioning of the mandibular central incisors. A point designates the distal of the mandibular canine. A line follows the crest of the residual ridge from the canine point to the middle of retromolar pad, aids in the buccolingual position of the mandibular posterior teeth. A line that bisects the vertical height of the retromolar pad aids in establishing the vertical position of the occlusal surfaces of the posterior teeth. Figure (9-2): Guide lines of the mandibular cast. Maxillary anterior teeth: Following the maxillary occlusion rim. Mandibular anterior teeth: Using the occlusion rims and maxillary teeth as guides. Mandibular posterior teeth: Using the anterior teeth, retromolar pads, and residual ridges as guides. Maxillary posterior teeth: Using the mandibular posterior teeth as guides. The anterior teeth should be arranged to provide: 1- Proper lip support. 2- Permit satisfactory phonetic. 3- Pleasing esthetic. 4- To set the teeth in place where they grew. The bone loss is upward and backward direction for the maxillary residual ridge; downward and outward for the mandibular residual ridge, therefore the maxillary artificial teeth should be arranged anteriorly and inferiorly to the residual ridge to occupy the space formerly occupied by the natural teeth. -
Anatomical Landmarks in Order to Study an Individual Tooth Intelligently, We Must Be Able to Recognize All Landmarks of Importance by Name
DENTAL ANATOMY 1ST grade Lec.3 Anatomical Landmarks In order to study an individual tooth intelligently, we must be able to recognize all landmarks of importance by name. These include: 1. Cusp: It is an elevation on the crown portion of a tooth making up a divisional part of the occlusal surface. Cusps are present in the posterior teeth and the canines. •• Canine teeth have a single cusp; they are often called as the cuspids. •• Premolars generally have two cusps with an exception of the mandibular 2nd premolar which frequently has three cusps. Premolars are therefore also called as the bicuspids. 1 •• Maxillary and mandibular 1st molars have five cusps, while other molars generally have four cusps. Each cusp is a gothic pyramid with four sides formed by four ridges that run down from the cusp tip: •• Mesial and distal cusp ridges (cusp slopes) •• Buccal/lingual cusp ridge •• Triangular ridge of the cusp. There are two cusp slopes on either side of the triangular ridge. In case of canines, there is a labial ridge analogous to the buccal ridge posterior teeth; there is a lingual ridge analogous to triangular ridge of posterior teeth. In the Table below the Number of cusps in different types of teeth: Tooth type Maxillary arch Mandibular arch Incisors 0 0 Canines 1 1 Premolars 2 2 in 1st premolar 3 or 2 in 2nd premolar Molars 1st molar 4 +1 accessory cusp 5 (cusp of Carabelli) 2nd molar 4 4 3rd molar 4 or 3 4 or 5 A cusp is named according to its location on the tooth.