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Local Analgesia
Published in M S Duggal, M E J Curzon, S A Fayle, K J Toumba, A J Robertson, Restorative Techniques in Paediatric Dentistry, 2021
M S Duggal, M E J Curzon, S A Fayle, K J Toumba, A J Robertson
solution is introduced via the periodontium, travelling down the periodontal space. The majority of solution deposited escapes through the lamina dura into cancellous bone. It is therefore in some ways similar to an intraosseous injection.
Bacterial Infections of the Oral Cavity
Published in K. Balamurugan, U. Prithika, Pocket Guide to Bacterial Infections, 2019
P. S. Manoharan, Praveen Rajesh
The root of the tooth is embedded in the alveolar bone of the maxilla and mandible. The cementum is a hard tenacious layer that covers the root surface, which is 15–150 microns thick. The tooth is anchored to the alveolar bone through periodontal ligament, a fibro-epithelial tissue layer that is sensitive to pressure stimuli, but at the same time protective for the tooth by acting as a cushion against microtrauma. The periodontal ligament is seen extending from the cementum of the root to the cortical plate of the alveolar bone (supporting bone surrounding the tooth structure of maxilla and mandible). The thin cortical plate aids in attachment to the periodontal ligaments, which is described as a lamina dura and is a radiopaque line in radiographs.
Surgical endodontics
Published in John Dudley Langdon, Mohan Francis Patel, Robert Andrew Ord, Peter Brennan, Operative Oral and Maxillofacial Surgery, 2017
Radiographically, the procedure is said to be successful with bony infilling of the peri-radicular defect and appearance equivalent to that of a normal periodontal ligament and lamina dura. This imaging should be NO less than 3 months post-operatively.
Influence of fiber insertion and different material type on stress distribution in endocrown restorations: a 3D-FEA study
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2022
Gulhan Yildirim, Cihan Demir, Melahat Çelik Güven, Osman Koç, Evrim Eligüzeloglu Dalkiliç
A three-dimensional (3D) model of a mandibular first molar tooth was digitized with a micro-CT (Computed Tomography) scanner system (InEos X5, Sirona Dental Systems GmbH, Bensheim, Germany). This blue light lab scanner is accredited to be accurate within 2.1 microns (ISO 12836) (Etemad-Shahidi et al. 2020). The sample size was determined by using a sample size calculation with 95% confidence level and a margin of error of 5%. This has been confirmed by previous studies as acceptable to achieve statistically significant results (Mangano et al. 2017; Kang et al. 2020). Point clouds were obtained from these scans and were exported in stereolithography (STL) format. The file in STL format was processed in the Spaceclaim CAD software program (SpaceClaim Corporation; Canonsburg, PA, USA). The solid tooth model and its sub-components were obtained according to the point density. The periodontal ligament (PDL) and cortical bone were simulated around the models. The FEA models were modeled with 0.2 mm thickness periodontal ligament, 0.3 mm thickness lamina dura, and the cortical and trabecular bone were generated. Cortical bone structure was constructed with a 2 mm thickness (Kraus et al. 1969).
A randomized clinical trial of hyaluronic acid gel pulpotomy in primary molars with 1 year follow-up
Published in Acta Odontologica Scandinavica, 2022
Gökçe Çiçek Ildeş, Batın Ilgıt Sezgin, Alexandre Rezende Vieira, Ali Mentes
Children were recalled at 1st-, 3rd-, 6th- and 12th-month intervals, periapical x-rays (Dürr Dental, Germany) were taken. Teeth were evaluated clinically and radiographically according to the following criteria: (1) Clinical criteria: Spontaneous pain, tenderness to percussion and/or palpation, pathological mobility and abscess or fistula, (2) Radiographic criteria: Periapical or furcal radiolucency, internal or external root resorption, loss of lamina dura, pulp canal obliteration. All evaluations were performed by two calibrated paediatric dentists (BIS and AM). The patients were blinded to the group assignments, the performing dentist (GCI) was not blinded to the treatment materials but two examiners who evaluated clinical and radiographic findings were blinded to the treatment (Intra and inter-rater reliability; 0.89, and 0.85 respectively).
Tooth root and alveolar bone grey values derived from cone-beam CT imaging in maxillary incisor teeth with and without apical root resorption
Published in Journal of Orthodontics, 2018
Marcio José da Silva Campos, Karine Simões Silva, Paula Moraes Lupatini, Marcelo Reis Fraga, Robert Willer Farinazzo Vitral
In the present study, the alveolar bone of the lingual region of the maxillary incisors with ARR showed mean values of ABGV greater than those of the adjacent bone of the incisors without ARR, however, without a statistically significant difference. This finding indicated that ARR during orthodontic treatment was not associated with the degree of mineralisation of the alveolar bone located in the lingual region of the root. Conversely, the alveolar bone of the supra-apical region exhibited values of ABGV significantly smaller in the incisors with ARR. This might have occurred because in the incisors with ARR the area delineated for the evaluation of the supra-apical region became more distant from the root apex and consequently from the lamina dura of the alveolar bone that contours the apex, what may have decreased the cortical/medullary bone ratio in the evaluations of the teeth on this group.