scholarly journals Optimal dimension of peri-implant mucosa in the molar region

2021 ◽  
Vol 63 (3) ◽  
pp. 113-118
Author(s):  
Joichiro Hayashi ◽  
Kitetsu Shin
Keyword(s):  
Optimal Dimension ◽  
Molar Region

Axial Triangle of the Maxillary Sinus, and its Surgical Implication With the Position of Maxillary Sinus Septa During Sinus Floor Elevation: A CBCT Analysis

2020 ◽  
Vol 46 (4) ◽  
pp. 415-422
Author(s):  
Junho Jung ◽  
Jung Soo Park ◽  
Seoung-Jin Hong ◽  
Gyu-Tae Kim ◽  
Yong-Dae Kwon
Keyword(s):  
Maxillary Sinus ◽  
Surgical Techniques ◽  
Lateral Sinus ◽  
Sinus Floor Elevation ◽  
Second Molar ◽  
Sinus Wall ◽  
Posterior Maxilla ◽  
Significant Difference ◽  
Sinus Floor ◽  
Molar Region

The aim of this study was to measure the convexity of the lateral wall of the maxillary (Mx) sinus and identify the locational distribution of antral septa in relation to the zygomaticomaxillary buttress (ZMB), in order to suggest another anatomical consideration and surgical modification of sinus floor elevation procedures. This study was designed as a cross-sectional study, and a total of 134 patients and 161 sinuses containing edentulous alveolar ridges were analyzed. The angle between the anterior and lateral walls of the Mx sinus (lateral sinus angle [LSA]), and the angle between the midpalatal line and the anterior sinus wall (anterior sinus angle [ASA]) were measured. Mean LSAs and ASAs were 105.9° ± 9.86° and 58.4° ± 6.43°, respectively. No significant difference between left and right sides was found (LSA, P = .420; right = 105.5° ± 9.27°; left = 105.5° ± 9.27° and ASA, P = .564; right = 57.9° ± 6.80°; left = 58.8° ± 6.02°). The prevalence of septa was 37.3%, and it was most frequently noted in the second molar region (32.8%), followed by the first molar (20.9%), retromolar (16.4%), and second premolar regions (14.9%). Septa were most frequently located posterior to the ZMB (49.2%), while ZMB was mostly located in the first molar region (66.4%). Narrow LSAs may complicate the surgical approach to the posterior maxilla, especially when sinus elevation should be used in the second molar region. Considering the occasional presence of antral septa, membrane elevation may be complicated when a septum is encountered during the procedure. These results suggest that 3-dimensional examination of the convexity of the Mx sinus should be performed preoperatively to choose proper surgical techniques and minimize surgical complications.

A Supernumerary Tooth in the Lower Molar Region: A Case Report

1975 ◽  
Vol 61 (2) ◽  
pp. 88-88
Author(s):  
L. C. Langan
Keyword(s):  
Case Report ◽  
Third Molar ◽  
Supernumerary Teeth ◽  
Supernumerary Tooth ◽  
Lower Jaw ◽  
Upper Third ◽  
Lower Molar ◽  
Molar Region

AbstractSupernumerary teeth in the upper third molar region are relatively common but cases in the lower jaw are rare. In his survey of supernumerary teeth Stafne (1932) saw 131 upper but only 10 lower fourth molars. The following is a report of a single supernumerary tooth in the lower third molar region.

Numerical Study on the Effect of a Submerged Breakwater Seaward of an Existing Breakwater for Climate Change Adaptation

2018 ◽  
Author(s):  
Athul Sasikumar ◽  
Arun Kamath ◽  
Onno Musch ◽  
Arne Erling Lothe ◽  
Hans Bihs
Keyword(s):  
Climate Change ◽  
Numerical Model ◽  
Transmission Coefficient ◽  
Numerical Study ◽  
Protective Measure ◽  
Test Case ◽  
Relative Width ◽  
Optimal Dimension ◽  
Submerged Breakwater ◽  
Design Storm

In coastal areas, climate change is causing mean sea level rise and more frequent storm surge events. This means the breakwaters are expected to withstand the action of more severe incident waves and larger overtopping rates than they were designed for. Therefore, these impacts may have a negative effect on the functionality such as overtopping above the acceptable limits, in addition to stability of these structures. A breakwater which has been partly damaged by a storm stronger than the design storm has weak spots that can easily be damaged further. One way of protecting these breakwaters subjected to climate change is to build a submerged breakwater on the seaward side. This study focuses on the use of numerical model for optimal dimension of a submerged breakwater to be used as a protective measure for an existing structure. Comparisons are made between transmission coefficient predicted in the numerical model and those calculated from different formulae in literature. The variation in transmission coefficient due to different relative submergence and relative width parameters for waves with different steepness is studied and curves showing the dependence of these parameters on wave transmission are made. These results are then used for a test case in Kiberg, Norway where a submerged breakwater is proposed in front of a existing damaged rubble mound breakwater. The optimal geometry generated on the basis of curves is then implemented in the local-scale finite element wave prediction model, CGWAVE.

Infinitely many solutions for cubic nonlinear Schrödinger equations in dimension four

2017 ◽  
Vol 8 (1) ◽  
pp. 715-724 ◽  
Author(s):  
Jérôme Vétois ◽  
Shaodong Wang
Keyword(s):  
Nonlinear Schrödinger Equations ◽  
Schrodinger Equations ◽  
Infinitely Many Solutions ◽  
Schrödinger Equations ◽  
Optimal Dimension ◽  
Nonlinear Schrödinger ◽  
Nonlinear Schrodinger Equations

Abstract We extend Chen, Wei and Yan’s constructions of families of solutions with unbounded energies [5] to the case of cubic nonlinear Schrödinger equations in the optimal dimension four.

scholarly journals Conduction of Third Molar Extraction with the Presence of Retromolar Canal: A Case Report

2021 ◽  
Vol 15 (1) ◽  
pp. 547-550
Author(s):  
Lara Jaiane Norbert Furlan ◽  
Caroline De Freitas Conceição ◽  
Eduardo Martinelli Santayana de Lima ◽  
Roberto Ferreira Zanin ◽  
Alexandre Weber
Keyword(s):  
Third Molar ◽  
Radiographic Examination ◽  
Prevention Measures ◽  
Anatomical Structures ◽  
Third Molar Extraction ◽  
Dental Procedures ◽  
Mandibular Third Molar ◽  
Santa Maria ◽  
Molar Region ◽  
Retromolar Canal

Introduction: The retromolar canal is a structure rarely identified in clinical practice. The content of this canal is composed of nerves, arteries and venous plexus that give innervation and irrigation to the third molar region and the vestibular mucosa of molars and lower premolars. Thus, knowledge of the presence of this structure is important in dental procedures, due to the complications that damage to this structure can cause. Methods: In this report, a 19-year-old patient sought dental care at a clinic, Dentistry course at the Federal University of Santa Maria for the extraction of third molars due to hygiene difficulties. On radiographic examination, a retromolar canal was identified at the distal of the left mandibular third molar. With the identification of this structure, preventive measures were performed during the procedure to avoid complications. Results: With adequate planning and prevention measures, the trans and postoperative periods occurred without any complications. Conclusion: The foramen and the retromolar canal may occasionally appear in the clinic radiographic routine of the Dentist, and the professional should be attentive to the management of these anatomical structures during surgical procedures to avoid accidents and complications.

scholarly journals Optimalisasi Gerakan Oklusal Gigi Kaninus Maksila Menggunakan Lingual Button pada Alat Ortodontik Lepasan

2015 ◽  
Vol 1 (2) ◽  
pp. 108
Author(s):  
Wuriastuti Kusumandari ◽  
Wayan Ardhana ◽  
Christnawati Christnawati
Keyword(s):  
Growth And Development ◽  
Permanent Teeth ◽  
Etiologic Factor ◽  
Orthodontic Appliance ◽  
Maxillary Canine ◽  
Angle Class Ii ◽  
Anterior Teeth ◽  
Division 1 ◽  
Abstract Optimization ◽  
Molar Region

Pertumbuhan dan perkembangan tulang rahang berhubungan dengan ketersediaan ruang untuk menampung gigi-gigi permanen. Kurangnya panjang lengkung rahang sering dianggap sebagai faktor etiologi terjadinya gigi berjejal dan impaksi. Panjang lengkung palatal yang kurang dapat menyebabkan terlambatnya erupsi gigi maksila. Perawatan yang dilakukan menggunakan alat ortodontik lepasan memiliki keterbatasan dalam memberikan gerakan oklusal untuk membantu erupsi gigi permanen. Pasien perempuan usia 10 tahun mengeluhkan gigi depan atas maju dan gigi bawah berjejal. Hasil pemeriksaan objektif ditemukan crowded ringan gigi anterior bawah, 53 palatoversi, 43 labioversi serta gigi 13 dan 23 belum erupsi. Maloklusi Angle klas II divisi 1 sub divisi dengan overjet normal dan deep overbite. Analisis ruang menurut Moyers dan Nance menunjukkan adanya kekurangan ruang untuk tumbuh gigi 13 dan 23. Pasien dirawat dengan plat ekspansi radial simetri pada rahang atas karena terjadi kontraksi ringan pada regio premolar dan distraksi ringan pada regio molar, guna mencarikan ruang untuk tumbuhnya gigi 13 dan 23 dan pada rahang bawah untuk koreksi crowded anterior. Enam bulan setelah gigi 53 dan 63 tanggal, proses erupsi gigi 13 dan 23 berterlihat mengalami kelambatan. Oleh karena itu, pada permukaan labial gigi 13 dan 23 yang mulai erupsi sebagian, dipasangkan lingual button yang dikombinasikan dengan buccal spring untuk membantu gerakan oklusal pada proses erupsinya. Lingual button merupakan salah satu komponen cekat yang dipasangkan pada permukaan gigi dan dikombinasikan dengan buccal spring untuk mengoptimalkan gerakan oklusal pada alat ortodontik lepasan. ABSTRACT: Optimization of Maxillary Canine Occlusal Movement Using the Fixed Component of Removable Orthodontic Appliance. The growth and development of jawbones are related to the availability of space for permanent teeth. Arch-length deficiency is often mentioned as an etiologic factor for crowding and impactions. A short palatal length can delay the eruption of maxillary teeth. The treatment using removable orthodontic appliance has a limitation in giving occlusal movement to help permanent teeth erupt. A 10-year-old female patient complained about protrusive upper anterior teeth and crowded lower anterior teeth. The objective examination found lightly crowded lower anterior teeth, 53 palatoversion, and 43 labioversion, while teeth 13 and 23 had not erupted. Angle Class II division 1 sub division malocclusion with normal overjet and deep overbite was detected. The space analysis of Moyers and Nance showed the lack of available space for 13 and 23 eruption. The patient was treated with symmetrical radial expansion plate on the maxilla because of a mild contraction on the premolar region and mild distraction on the molar region in order to gain space for 13 and 23 eruption as well as on the mandible for correction of the lower anterior teeth crowding. Six months after 53 and 63 losses, there was a delay in the 13 and 23 eruptions. Therefore, on the labial surfaces of 13 and 23 that start erupting partially a lingual button combined with buccal spring was attached to help the occlusal movement during the eruption process. Lingual button is one of the fixed orthodontic components attached on the surface of teeth and combined with buccal spring in order to optimize the occlusal movement on removable orthodontic appliance.

scholarly journals Karsinoma Odontogenik Sel Jernih

2015 ◽  
Vol 1 (1) ◽  
pp. 31-40
Author(s):  
Rino Rusdiono ◽  
Arif Faisal
Keyword(s):  
Ct Scan ◽  
Clear Cell ◽  
Histopathological Examination ◽  
Dentigerous Cyst ◽  
Odontogenic Tumor ◽  
Tissue Mass ◽  
Maxillary Bone ◽  
Imaging Examination ◽  
Odontogenic Carcinoma ◽  
Molar Region

Odontogenic tumor is a lesion originated from epithelium, ectomesenchymal, or mesenchymal component which still retain part of dental-forming element.A female 20 years old had complaint a mass in the oral cavity and obtructed nasal. Physical examination showed a mass on molar region of the left axillary bone. Diagnostic imaging by using OPG was suspected ameloblastoma, while CT scan concluded as a dentigerous cyst in left maxillary bone. Both of the lesions were cystic  abnormalities, that sometimes very difcult to di?erentiate due to their similarity. Pathological fndings was clear cell odontogenic tumor or clear cell odontogenic carcinoma of tissue mass after resection had been conducted. This case report is proposed because there is a discordance from imaging examination in both OPG and CT Scan with the fnal histopathological examination. CCOC di?erential diagnosis will be outlined here so we can understand the feature of CCOC better in imaging examination to prevent misdiagnosis which can infere further treatment.

scholarly journals A case of three impacted supernumerary teeth in the third molar region of the right maxilla

2017 ◽  
Vol 63 (2) ◽  
pp. 83-86
Author(s):  
Misato TADA ◽  
Shigehiro ONO ◽  
Kouji OHTA ◽  
Hideo SHIGEISHI ◽  
Kazuki SASAKI ◽  
...  
Keyword(s):  
Third Molar ◽  
Supernumerary Teeth ◽  
The Third ◽  
The Right ◽  
Molar Region
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