Tooth onoteny in Didelphis virginiana (Marsupialia : Didelphidae)

1978 ◽  
Vol 26 (1) ◽  
pp. 61 ◽  
Author(s):  
BKB Berkovitz
Keyword(s):  
Didelphis Virginiana ◽  
Ontogenetic Development ◽  
Crown Rump Length ◽  
Dental Lamina ◽  
Permanent Molar ◽  
Molar Teeth ◽  
Lower Molar

The ontogenetic development of the teeth was studied in a series of seven specimens of Didelphis virginiana whose crown-rump length varied from 11 to 49 mm. Though all developing teeth showed undifferentiated lingual downgrowths of dental lamina, there was no evidence of any non-functional teeth. No more than five upper incisors were present at any one time. The metacone was the first cusp to calcify in the upper deciduous and fist permanent molar teeth. The protoconid was the first cusp to calcify in the lower molar teeth. The results were compared with findings from a recent study of tooth ontogeny in Antechinus flavipes.

PREVALENSI KARIES GIGI MOLAR SATU PERMANEN PADA ANAK UMUR 6-9 TAHUN DI SEKOLAH DASAR KECAMATAN TOMOHON SELATAN

e-GIGI ◽  
2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Marsela Liwe ◽  
Christy N. Mintjelungan ◽  
Paulina N. Gunawan
Keyword(s):  
Elementary Schools ◽  
Dental Caries ◽  
Sampling Method ◽  
Permanent Teeth ◽  
Primary Data ◽  
Cross Sectional ◽  
Permanent Molar ◽  
Molar Teeth ◽  
Milk Teeth ◽  
Cross Sectional Design

Abstract: In children, caries occurs mostly at the age of 6 to 9 years. At the age of 6 years permanent molar teeth begin to erupt, therefore, they are more susceptible to caries. Moreover, at the age of 9 years, a period of mingled teeth where the number of permanent teeth and of the milk teeth are nearly the same. This study aimed to obtain the prevalence of dental caries of the first permanent molar among students of elementary schools in South Tomohon. This was a descriptive study with a cross-sectional design. The population of this study was 72 students aged 6-9 years old. Samples were obtained by using total sampling method. Primary data were obtained by examination of the teeth and mouth. The results showed that the prevalence of caries among students of elementary schools in South Tomohon was 68.1% (49 students). Based on gender, caries were most frequent among males (68.4%). Based on age, caries were most frequent among students of 8 years old (79.2%). Based on tooth element, tooth 36 had the highest incidence of caries (37.2%). Based on the severity of caries, dentine caries was the most frequent (46.51%).Keywords: dental caries, the first permanent molarAbstrak: Karies merupakan penyakit yang banyak menyerang anak-anak terutama umur 6 sampai 9 tahun. Pada umur 6 tahun gigi molar permanen sudah mulai tumbuh sehingga lebih rentan terkena karies dan umur 9 tahun merupakan periode gigi bercampur dimana jumlah gigi permanen dan gigi sulung dalam rongga mulut hampir sama. Penelitian ini bertujuan untuk mengetahui prevalensi karies gigi molar satu permanen pada anak di SD kecamatan Tomohon Selatan. Penelitian ini menggunakan metode deskriptif observasional dengan pendekatan potong lintang. Populasi penelitian yaitu anak umur 6 - 9 tahun di SD kecamatan Tomohon Selatan dengan jumlah 72 orang. Sampel penelitian digunakan total sampling. Metode pengambilan data secara primer yaitu dengan pemeriksaan gigi dan mulut. Hasil penelitian menunjukkan prevalensi karies pada anak-anak di SD kecamatan Tomohon Selatan mencapai 68,1% dengan jumlah 49 anak. Berdasarkan jenis kelamin angka kejadian karies tertinggi didapatkan pada anak laki-laki mencapai 26 anak (68,4%). Berdasarkan usia angka kejadian karies tertinggi didapatkan pada usia 8 tahun mencapai 19 anak (79,2%). Berdasarkan elemen gigi, gigi 36 merupakan yang paling tinggi angka kejadian kariesnya yaitu 32 gigi (37,2%) dan berdasarkan tingkat keparahan karies kejadian karies dentin yang paling tinggi yaitu mencapai 40 gigi (46,51%).Kata kunci: karies gigi, molar satu permanen

scholarly journals Endodontic treatment of a mandibular hypertaurodontic second molar

2015 ◽  
Vol 63 (2) ◽  
pp. 203-206
Author(s):  
Emmanuel João Nogueira Leal SILVA ◽  
Plínio Mendes SENNA ◽  
Tauby de Souza COUTINHO FILHO ◽  
Renato Liess KREBS
Keyword(s):  
Anatomical Variations ◽  
Endodontic Treatment ◽  
Study Objective ◽  
Second Molar ◽  
Clinically Normal ◽  
Permanent Molar ◽  
Root Sheath ◽  
Molar Teeth ◽  
Root Canal System ◽  
Apical Displacement

Taurodontism is the consequence of a developmental disorder in which the invagination of Hertwig's epithelial root sheath doesn't occur at a proper level. As a result, the pulp body and the chamber of a multi-root tooth, usually permanent molar teeth, are enlarged by the apical displacement of the pulp floor. Despite its clinically normal appearance, the morphological variation of this tooth can be diagnosed by a routine radiographic exam that shows enlarged apico-occlusal pulp chamber and short roots. Due to these anatomical variations, endodontic treatment of a taurodontic element is a clinical challenge given the complexity of localization and instrumentation of the root canal system. According to the degree of displacement of the pulp floor, taurodontism can be classified as: hypotaurodontism, mesotaurodontism and hypertaurodontism. This study objective is to report a clinical case of a patient who was submitted to endodontic treatment of the second inferior molar affected by hypertaurodontism.

Incidence of endodontically treated first permanent molar teeth among Saudi children subpopulation

2018 ◽  
Vol 10 (5) ◽  
pp. 250
Author(s):  
AbdulazizSaad Abumelha ◽  
AtheerAhmad Alhammadi ◽  
EmanAbdulrahman Alshahrani ◽  
ZahraAbdullah Alsafi ◽  
TasneemS Ain
Keyword(s):  
Permanent Molar ◽  
Molar Teeth

Achieving correction of a posterior scissorbite with a mini-screw

2020 ◽  
Vol 13 (1) ◽  
pp. 17-18
Author(s):  
Jason Matharu ◽  
Lucy Macey-Dare ◽  
James Dickson ◽  
Jerry Farrier
Keyword(s):  
Case Report ◽  
Clinical Relevance ◽  
Minimal System ◽  
Posterior Teeth ◽  
Permanent Molar ◽  
Adolescent Patients ◽  
Molar Teeth ◽  
Permanent Molars ◽  
Fixed Appliances

Scissorbite correction of posterior teeth can often be challenging. For adolescent patients, they may occur due to late eruption of the second permanent molar teeth after appliances are removed, or due to operator preference not to include them on the appliance. This case report describes a 17-year-old patient who had previously been treated with fixed appliances but did not originally have second permanent molars bonded. Complete correction of the scissorbite on the UR7 was effectively achieved in 14 weeks using a minimal system comprising only a palatal mini-screw, molar band and elastomeric chain. CPD/Clinical Relevance: Mini-screws placed in a palatal position can provide an effective way to correct posterior scissorbites.

scholarly journals Extraction of first permanent molar teeth: results from three dental hospitals

BDJ ◽  
2007 ◽  
Vol 203 (7) ◽  
pp. E14-E14 ◽  
Author(s):  
S. Albadri ◽  
H. Zaitoun ◽  
S. T. McDonnell ◽  
L. E. Davidson
Keyword(s):  
Permanent Molar ◽  
Molar Teeth

Root and canal morphology of maxillary first and second permanent molar teeth in a Ugandan population

2007 ◽  
Vol 40 (9) ◽  
pp. 679-683 ◽  
Author(s):  
C. M. Rwenyonyi ◽  
A. M. Kutesa ◽  
L. M. Muwazi ◽  
W. Buwembo
Keyword(s):  
Permanent Molar ◽  
Molar Teeth ◽  
Canal Morphology ◽  
Ugandan Population

The relationship between loss of first permanent molar teeth and the prevalence of caries and restorations in adjacent teeth: a study of 15–16-year-old children

1988 ◽  
Vol 16 (4) ◽  
pp. 155-159 ◽  
Author(s):  
S.J. Oliver ◽  
P.M.H. Dummer ◽  
R.G. Oliver ◽  
R. Hicks ◽  
M. Addy ◽  
...  
Keyword(s):  
Permanent Molar ◽  
Molar Teeth ◽  
The Relationship

scholarly journals Sealant Effectiveness for Children Receiving a Combination of Preventive Methods in a Fluoridated Community: Two-Year Results

1977 ◽  
Vol 56 (12) ◽  
pp. 1511-1519 ◽  
Author(s):  
Robert A. Bagramian ◽  
Richard C. Graves ◽  
Sujan Srivastava
Keyword(s):  
First Graders ◽  
Dental Health ◽  
Sixth Graders ◽  
Occlusal Caries ◽  
Permanent Molar ◽  
Occlusal Surfaces ◽  
Molar Teeth ◽  
Permanent Molars ◽  
Preventive Methods ◽  
Sealant Retention

A series of preventive methods in combination have been used to reduce dental caries in children including dental health education, prophylaxes, pit and fissure sealants, topical application of fluoride and restorative care. Prophylaxes, sealant, and fluoride procedures are repeated every six months. Two-year results show reductions of occlusal caries increments of 74.3% for first graders and 77.1% for sixth graders. Sealant loss, as defined in this study, varied from 33% to 90% with the highest loss occurring in the newly erupted permanent molars during the first six months of the project. These high sealant loss rates are thought to be related to the age of the population which was designed to include children at the ages of peak eruption of permanent molar teeth (ages six and twelve). These teeth were often only minimally erupted and maintaining the dry field required for sealant retention was extremely difficult. However, in spite of these high rates of sealant loss, caries reduction on occlusal surfaces was highly significant in comparison to that of children who did not receive sealants.

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