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https://www.readbyqxmd.com/read/28523304/optical-coherence-tomography-applications-in-tooth-wear-diagnosis
#1
Veronica MercuŢ, Sanda Mihaela Popescu, Monica Scrieciu, Marina Olimpia Amărăscu, Mihaela Vătu, Oana Andreea Diaconu, Eugen Osiac, Ştefan Mugurel Ghelase
Dental wear represents an irreversible loss of dental hard tissue under the action of physical, chemical and mechanical factors, excluding dental caries and acute trauma. Four clinical forms of dental wear are described: erosion, attrition, abfraction, and abrasion. Most experts agree that in each clinical form multiple etiological factors are involved, one being predominant. Optical coherence tomography (OCT) is a non-invasive optical method characterized by a micronic resolution. The applications of this type of investigation are multiple in the medical field in recent years, and OCT is gaining a growing importance in dentistry...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523246/targeted-presurgical-decompensation-in-patients-with-yaw-dependent-facial-asymmetry
#2
Kyung-A Kim, Ji-Won Lee, Jeong-Ho Park, Byoung-Ho Kim, Hyo-Won Ahn, Su-Jung Kim
Facial asymmetry can be classified into the rolling-dominant type (R-type), translation-dominant type (T-type), yawing-dominant type (Y-type), and atypical type (A-type) based on the distorted skeletal components that cause canting, translation, and yawing of the maxilla and/or mandible. Each facial asymmetry type represents dentoalveolar compensations in three dimensions that correspond to the main skeletal discrepancies. To obtain sufficient surgical correction, it is necessary to analyze the main skeletal discrepancies contributing to the facial asymmetry and then the skeletal-dental relationships in the maxilla and mandible separately...
May 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28523242/effects-of-bracket-slot-size-during-en-masse-retraction-of-the-six-maxillary-anterior-teeth-using-an-induction-heating-typodont-simulation-system
#3
Ji-Yong Kim, Won-Jae Yu, Prasad N K Koteswaracc, Hee-Moon Kyung
OBJECTIVE: To investigate how bracket slot size affects the direction of maxillary anterior tooth movement when en-masse retraction is performed in sliding mechanics using an induction-heating typodont simulation system. METHODS: An induction-heating typodont simulation system was designed based on the Calorific Machine system. The typodont included metal anterior and resin posterior teeth embedded in a sticky wax arch. Three bracket slot groups (0.018, 0.020, and 0...
May 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28512551/consensus-statements-and-clinical-recommendations-on-treatment-indications-surgical-procedures-prosthetic-protocols-and-complications-following-all-on-4-standard-treatment-9th-mozo-grau-ticare-conference-in-quintanilla-spain
#4
REVIEW
Miguel Penarrocha-Diago, María Penarrocha-Diago, Regino Zaragozí-Alonso, David Soto-Penaloza, Meeting On Behalf Of The Ticare Consensus
OBJECTIVES: The present consensus report critically evaluates the scientific evidence based on a comprehensive systematic review of the All-On-4 treatment concept, focusing primarily on the treatment indications, surgical procedures and prosthetic protocols, and secondarily on the mechanical and biological complications involved. MATERIAL AND METHODS: A systematic review was made in advance of the meeting. Consensus statements, treatment guidelines and recommendations for future research were based on within-group as well as plenary debates and discussions of the systematic review...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28511529/orthodontic-therapy-for-paediatric-cancer-survivors-a-review
#5
REVIEW
Sumita Mishra
The paper aims at reviewing the possibilities of orthodontic therapy for paediatric cancer survivors. It is important to understand the fundamental disease, it's treatment protocols, effects on growing skeleton, dental development, oral cavity and oral mucosa, dental caries, bone, orthodontic tooth movement.
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28506652/comparison-of-denture-tooth-movement-between-cad-cam-and-conventional-fabrication-techniques
#6
Brian J Goodacre, Charles J Goodacre, Nadim Z Baba, Mathew T Kattadiyil
STATEMENT OF PROBLEM: Data comparing the denture tooth movement of computer-aided design and computer-aided manufacturing (CAD-CAM) and conventional denture processing techniques are lacking. PURPOSE: The purpose of this in vitro study was to compare the denture tooth movement of pack-and-press, fluid resin, injection, CAD-CAM-bonded, and CAD-CAM monolithic techniques for fabricating dentures to determine which process produces the most accurate and reproducible prosthesis...
May 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28476575/contribution-of-atypical-chemokine-receptor-2-ackr2-in-bone-remodeling
#7
Izabella Lucas de Abreu Lima, Janine Mayra da Silva, Letícia Fernanda Duffles Rodrigues, Davidson Frois Madureira, Angélica Cristina Fonseca, Gustavo Pompermaier Garlet, Mauro Martins Teixeira, Remo Castro Russo, Sandra Yasuyo Fukada, Tarcília Aparecida da Silva
INTRODUCTION: Bone remodeling is a tightly regulated process influenced by chemokines. ACKR2 is a decoy receptor for CC chemokines functioning as regulator of inflammatory response. In this study we investigated whether the absence of ACKR2 would affect bone phenotype and remodeling induced by mechanical loading. METHODS: An orthodontic appliance was placed between incisors and first molar of ACKR2 deficient (ACKR2(-/-)) and C57BL6/J (wild-type/WT) mice. Microtomography, histology and qPCR were performed to evaluate bone parameters, orthodontic tooth movement (OTM), bone cells counts and the expression of ACKR2, bone remodeling markers, CC chemokines and chemokines receptors...
May 3, 2017: Bone
https://www.readbyqxmd.com/read/28476202/periodontal-ligament-entheses-and-their-adaptive-role-in-the-context-of-dentoalveolar-joint-function
#8
REVIEW
Jeremy D Lin, Andrew T Jang, Michael P Kurylo, Jonathan Hurng, Feifei Yang, Lynn Yang, Arvin Pal, Ling Chen, Sunita P Ho
OBJECTIVE: The dynamic bone-periodontal ligament (PDL)-tooth fibrous joint consists of two adaptive functionally graded interfaces (FGI), the PDL-bone and PDL-cementum that respond to mechanical strain transmitted during mastication. In general, from a materials and mechanics perspective, FGI prevent catastrophic failure during prolonged cyclic loading. This review is a discourse of results gathered from literature to illustrate the dynamic adaptive nature of the fibrous joint in response to physiologic and pathologic simulated functions, and experimental tooth movement...
May 2, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28474060/-changes-of-tgf-%C3%AE-1-expression-during-orthodontic-tooth-movement-in-rats-with-osteoporosis
#9
Ming-He Li, Yang Wang, Nan-Nan Liao, Jin-Yuan Li, Qing Dong
PURPOSES: To observe the expression and distribution of TGF-β1 in periodontal tissue under intervention of Strontium ranelate and Qianggu capsule during orthodontic tooth movement in rats, and explore the efficacy of the 2 drugs. METHODS: Seventy male SD rats of 3 months old were selected in the study, and randomly divided into control group, model control group, Strontium ranelate group, Qianggu capsule group, each group had 15 animals. Retinoic acid was given by gavage to animals in the control group, Strontium ranelate group, Qianggu capsule group for 2 weeks, and bone density was detected to determine successful establishment of osteoporosis model...
February 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28474059/-the-mechanism-of-corticotomy-accelerating-orthodontic-tooth-movement-in-sd-rats
#10
Shao-Yue Zhu, Chang-Yong Yuan, Zong-Xiang Liu, Xiao-Ming Li, Peng-Lai Wang
PURPOSE: To study the influences of corticotomy on orthodontic tooth movement (OTM) and the underlying mechanism in rats. METHODS: Forty-eight female Sprague-Dawley rats were randomly assigned to corticotomy group (Cort, 24 rats) or sham-corticotomy group (Sham, 24 rats). All rats were subjected OTM after corticotomy or sham surgery. 6 rats of each group were sacrificed at 0, 1, 3 and 7 day of OTM. OTM were measured with an electronic digital caliper. Osteoclasts were counted in pressure side with TRAP...
February 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28471265/salivary-leptin-levels-in-normal-weight-and-overweight-individuals-and-their-correlation-with-orthodontic-tooth-movement
#11
Tamizhmani Jayachandran, Bhadrinath Srinivasan, Sridevi Padmanabhan
OBJECTIVES: To assess and compare the concentration of leptin in saliva between normal weight and overweight individuals and to evaluate the rate of orthodontic tooth movement. MATERIALS AND METHODS: Thirty female subjects were divided into two groups: I (normal weight) and II (overweight group) based on their body mass index. All subjects underwent fixed appliance therapy requiring upper first premolar extraction and distal movement of the canine. Distal force was applied to the maxillary right canine using active lacebacks...
May 4, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28469115/the-cell-biology-and-role-of-resorptive-cells-in-diseases-a-review
#12
REVIEW
Prashant Babaji, Raghu Devanna, Kiran Jagtap, Vishwajit Rampratap Chaurasia, Jeethu John Jerry, Basanta Kumar Choudhury, Dinesh Duhan
Resorptive cells are responsible for the resorption of mineralized matrix of hard tissues. Bone-resorbing cells are called osteoclasts; however, they can resorb mineralized dental tissues or calcified cartilage and then they are called odontoclasts and chondroclasts, respectively. Resorptive cells form when mononuclear precursors derived from a monocyte-macrophage cell lineage are attracted to certain mineralized surfaces and subsequently fuse and adhere onto them for exerting their resorbing activity. These cells are responsible for degradation of calcified extracellular matrix composed of organic molecules and hydroxyapatite...
April 2017: Annals of African Medicine
https://www.readbyqxmd.com/read/28457262/prevalence-of-gingival-recession-after-orthodontic-tooth-movements
#13
Jason W Morris, Phillip M Campbell, Larry P Tadlock, Jimmy Boley, Peter H Buschang
INTRODUCTION: This study was designed to evaluate the long-term prevalence of gingival recession after orthodontic tooth movements, focusing on the effects of mandibular incisor proclination and expansion of maxillary posterior teeth. METHODS: Records of 205 patients (162 female, 43 male) were obtained from 2 private practice orthodontists. Using pretreatment (age, 14.0 ± 5.9 years) and posttreatment (age, 16.5 ± 6.0 years) lateral cephalograms and dental models, mandibular incisor proclination and maxillary arch widths were measured...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28444179/a-novel-method-for-superimposition-and-measurements-on-maxillary-digital-3d-models-studies-on-validity-and-reliability
#14
Niels Ganzer, Ingalill Feldmann, Per Liv, Lars Bondemark
Background: Serial 3D models can be used to analyze changes, but correct superimposition is crucial before measurements can be assessed. Earlier studies show that every palatal structure changes due to growth or treatment. Here, we describe a new method that uses an algorithm-based analysis to perform superimpositions and measurements in maxillary 3D models. This method can be used to identify deformations. In a second step, only unchanged areas are used for superimposition. Objectives: This study investigates the validity and reliability of this novel method...
April 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28444165/proinflammatory-mediators-related-to-orthodontically-induced-periapical-root-resorption-in-rat-mandibular-molars
#15
Yoshiro Matsumoto, Siripen Sringkarnboriboon, Takashi Ono
Objectives: The early phase of orthodontic tooth movement involves acute inflammatory response that may induce bone resorption. The aim of this study was to localize and quantify cells in the periodontium expressing proinflammatory mediators during orthodontically induced periapical root resorption of the rat mandibular molars. Materials and methods: The levels of proinflammatory cytokines interleukin-1 (IL-1) α and β, tumor necrosis factor-α (TNF-α), inflammatory enzymes cyclooxygenase (COX) 1 and 2, and their product prostaglandin E2 (PGE2) in the root resorption site were compared to those in the corresponding area of the untreated periodontal ligament (PDL) of physiologically drifting teeth...
April 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28444013/third-molars-and-premolars-extraction-in-conventional-orthodontics-and-in-treatments-based-on-maxillary-bone-remodeling-with-temporary-anchorage-indications-and-care
#16
Alberto Consolaro
A bone is an anatomic structure in constant remodeling, with different, mutant and wonderfully inconstant designs. With every new and immediate functional demand, there are changes in cortical thickness, trabecular bone density and also in direction and size of trabeculae. Bones' non-stopping search is for adjusting to the functions induced by forces and movements required by a certain life style. Conventional orthodontic planning or with temporary anchorage based on bone remodeling takes into consideration the spaces that are - or may be - occupied by the teeth, in the formation of a functional and esthetic dental arch for the patient...
February 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28430887/measurement-of-forces-and-moments-around-the-maxillary-arch-for-treatment-of-a-simulated-lingual-incisor-and-high-canine-malocclusion-using-straight-and-mushroom-archwires-in-fixed-lingual-appliances
#17
Brandon Owen, Geoffry Gullion, Giseon Heo, Jason P Carey, Paul W Major, Dan L Romanyk
Introduction: An Orthodontic SIMulator (OSIM) was used to investigate the propagation of forces and moments around a simulated archform for a gingival displaced canine and lingual displaced lateral incisor using fixed lingual orthodontic appliances. Methods: In-Ovation L self-ligating lingual brackets were bonded to anatomically shaped teeth on the OSIM, and the teeth were positioned such that a G4 NiTi 0.016" large maxillary mushroom archwire could be ligated in passive position...
April 20, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28429956/efficacy-of-piezocision-on-accelerating-orthodontic-tooth-movement-a-systematic-review
#18
Jianru Yi, Jiani Xiao, Yu Li, Xiaobing Li, Zhihe Zhao
OBJECTIVES: The aim of this systematic review was to evaluate the effect of piezocision as an adjunctive procedure to accelerate orthodontic tooth movement. MATERIALS AND METHODS: Randomized controlled trials and controlled clinical trials that investigated the effectiveness of piezocision on accelerating orthodontic tooth movement were identified through electronic and manual searches. The literature search, study inclusion, risk of bias assessment, and data extraction were performed by two reviewers independently...
April 21, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28429487/effect-of-orthodontic-treatment-on-the-periodontal-tissues
#19
REVIEW
Joseph S Antoun, Li Mei, Kelsi Gibbs, Mauro Farella
Reduced periodontal support is a challenge that clinicians often face during rehabilitation of compromised dentition. The close and intricate relationship between the periodontal tissues and the processes of tooth movement suggest that adjunct orthodontic therapy may play an important role in overcoming these problems. On the other hand, excessive movement of teeth beyond the anatomic boundaries of the alveolar process is commonly believed to contribute to further destruction of the periodontal tissues. This review evaluates the clinical effects of various orthodontic tooth movements on the surrounding periodontal soft tissues and alveolar bone...
June 2017: Periodontology 2000
https://www.readbyqxmd.com/read/28416159/new-finite-element-study-protocol-clinical-simulation-of-orthodontic-tooth-movement
#20
Antoine Bouton, Yohann Simon, Florent Goussard, Luciano Teresi, Vittorio Sansalone
The aim of this work was to model tooth movement in a more clinically-exact fashion, thanks to the use of new IT tools and imaging systems (cone-beam). Image segmentation and 3D reconstruction now enable us to model the anatomy realistically, while finite element (FE) analysis makes it possible to evaluate stresses and their distribution on the level of the tooth, the periodontal ligament (PDL) and the alveolar bone when a force is applied. The principle is to monitor tooth movement by obtaining optical impressions at each stage of treatment...
April 13, 2017: International Orthodontics
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