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Root resorption

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https://www.readbyqxmd.com/read/27905816/cementocyte-cell-death-occurs-in-rat-cellular-cementum-during-orthodontic-tooth-movement
#1
Humihiro Matsuzawa, Naoko Toriya, Yuya Nakao, Moe Konno-Nagasaka, Toshiya Arakawa, Miki Okayama, Itaru Mizoguchi
OBJECTIVE: To clarify the mechanism of root resorption during orthodontic treatment, we examined cementocyte cell death and root resorption in the cellular cementum on the pressure side during experimental tooth movement. MATERIALS AND METHODS: Using 8-week-old male Wistar rats, the right first molar was pushed mesiobuccally with a force of 40 g by a Ni-Ti alloy wire while the contralateral first molar was used as a control. Localization and number of cleaved caspase-3-positive and single-stranded DNA (ssDNA) - positive cells were evaluated using dual-label immunohistochemistry with anticleaved caspase-3 and anti-ssDNA antibodies...
December 1, 2016: Angle Orthodontist
https://www.readbyqxmd.com/read/27903250/effectiveness-of-bovine-derived-xenograft-versus-bioactive-glass-with-periodontally-accelerated-osteogenic-orthodontics-in-adults-a-randomized-controlled-clinical-trial
#2
Maha A Bahammam
BACKGROUND: Periodontally accelerated osteogenic orthodontics (PAOO) combines periodontal therapy with orthodontic therapy, which minimises treatment time. This study compared the effectiveness of a bovine-derived xenograft with that of bioactive glass when combined with PAOO for the treatment of adult patients with moderate crowding of the teeth. METHODS: In this prospective, single-masked clinical trial, 33 orthodontic patients (20 women, 13 men; mean age 21.2 ± 1...
November 30, 2016: BMC Oral Health
https://www.readbyqxmd.com/read/27901237/iatrogenics-in-orthodontics-and-its-challenges
#3
Gustavo Mattos Barreto, Henrique Oliveira Feitosa
Introduction: Orthodontics has gone through remarkable advances for those who practice it with dignity and clinical quality, such as the unprecedented number of patients treated of some type of iatrogenic problems (post-treatment root resorptions; occlusal plane changes; midline discrepancies, asymmetries, etc). Several questions may raise useful reflections about the constant increase of iatrogenics. What is causing it? Does it occur when dentists are properly trained? In legal terms, how can dentists accept these patients? How should they be orthodontically treated? What are the most common problems? Objective: This study analyzed and discussed relevant aspects to understand patients with iatrogenic problems and describe a simple and efficient approach to treat complex cases associated with orthodontic iatrogenics...
September 2016: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/27897460/current-evidence-on-the-socket-shield-technique-a-systematic-review
#4
Amit Srikant Gharpure, Neel B Bhatavadekar
The recently popularised socket shield technique involves intentional retention of a thin buccal section of the remnant root at the time of immediate implant placement to preserve the buccal crestal bone from resorption. The objective of this systematic review was to assess the literature available on the socket-shield technique and weigh its biological plausibility and long-term clinical prognosis. A Systematic Search was performed in PubMed-Medline, Embase, Web of Knowledge, Google Scholar and Cochrane Central for clinical/ animal studies up to May 2016 without restrictions of language, duration, and follow-up...
November 29, 2016: Journal of Oral Implantology
https://www.readbyqxmd.com/read/27894545/ability-of-mini-implant-facilitated-micro-osteoperforations-to-accelerate-tooth-movement-in-rats
#5
Tracy Cheung, Juyoung Park, Deborah Lee, Catherine Kim, Jeffrey Olson, Shadi Javadi, Gregory Lawson, James McCabe, Won Moon, Kang Ting, Christine Hong
INTRODUCTION: Although current techniques for accelerated tooth movement often involve invasive surgical procedures, micro-osteoperforations (MOPs) using mini-implants may facilitate orthodontic tooth movement without raising flaps, reduce surgical risks, and increase patient acceptance. In this study, we evaluated the effectiveness of mini-implant-facilitated MOPs in inducing accelerated tooth movement and investigated the potential risks for root resorption. METHODS: Five MOPs were placed on the left side around the maxillary first molars in 6 rats using an automated mini-implant driver, whereas the right side received no MOPs as the control...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27894540/effect-of-supplemental-vibrational-force-on-orthodontically-induced-inflammatory-root-resorption-a-multicenter-randomized-clinical-trial
#6
Andrew T DiBiase, Neil R Woodhouse, Spyridon N Papageorgiou, Nicola Johnson, Carmel Slipper, James Grant, Maryam Alsaleh, Martyn T Cobourne
INTRODUCTION: A multicenter parallel 3-arm randomized clinical trial was carried out in 1 university and 2 district hospitals in the United Kingdom to investigate the effect of supplemental vibrational force on orthodontically induced inflammatory root resorption (OIIRR) during the alignment phase of fixed appliance therapy. METHODS: Eighty-one subjects less than 20 years old with mandibular incisor irregularity undergoing extraction-based fixed-appliance treatment were randomly allocated to supplementary (20 minutes a day) use of an intraoral vibrational device (AcceleDent; OrthoAccel Technologies, Houston, Tex) (n = 29), an identical nonfunctional (sham) device (n = 25), or fixed appliances only (n = 27)...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27894525/canine-lateral-incisor-transposition-controlling-root-resorption-with-a-bone-anchored-t-loop-retraction
#7
Yu Lin Hsu, Chris H Chang, W Eugene Roberts
A 12-year-old girl presented with a Class II Division 1 malocclusion, complicated by a complete transposition of the maxillary left canine into the position normally occupied by the left lateral incisor. Dental and medical histories were noncontributory. Brackets were bonded on all maxillary teeth, from first molar to first molar, except for the left lateral incisor. Because the lateral incisor was not engaged on the archwire, the tooth was free to physiologically move out of the path of canine root movement...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27888287/wnt-signaling-and-cellular-metabolism-in-osteoblasts
#8
REVIEW
Courtney M Karner, Fanxin Long
The adult human skeleton is a multifunctional organ undergoing continuous remodeling. Homeostasis of bone mass in a healthy adult requires an exquisite balance between bone resorption by osteoclasts and bone formation by osteoblasts; disturbance of such balance is the root cause for various bone disorders including osteoporosis. To develop effective and safe therapeutics to modulate bone formation, it is essential to elucidate the molecular mechanisms governing osteoblast differentiation and activity. Due to their specialized function in collagen synthesis and secretion, osteoblasts are expected to consume large amounts of nutrients...
November 26, 2016: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/27882250/apical-revascularization-after-delayed-tooth-replantation-an-unusual-case
#9
Marília Pacífico Lucisano, Paulo Nelson-Filho, Lea Assed Bezerra Silva, Raquel Assed Bezerra Silva, Fabricio Kitazono de Carvalho, Alexandra Mussolino de Queiroz
The aim of this paper is to present the clinical and radiological outcome of the treatment involving a delayed tooth replantation after an avulsed immature permanent incisor, with a follow-up of 1 year and 6 months. An 8-year-old boy was referred after dental trauma that occurred on the previous day. The permanent maxillary right central incisor (tooth 11) had been avulsed. The tooth was hand-held during endodontic therapy and an intracanal medication application with calcium hydroxide-based paste was performed...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27875512/single-tooth-osteotomy-combined-wide-linear-corticotomy-under-local-anesthesia-for-correcting-anterior-protrusion-with-ectopically-erupted-canine
#10
Nur Serife Iskenderoglu, Byung-Joon Choi, Kyung Won Seo, Yeon-Ji Lee, Baek-Soo Lee, Seong-Hun Kim
BACKGROUNDS: This article presents the alternative surgical treatments of both anterior protrusion by carrying out retraction on mandibular anterior fragment, meanwhile applying retraction force on maxilla anterior teeth and ectopically erupted canine with using platelet-rich fibrin (PRF). METHODS: Anterior segmental osteotomy was combined with linear corticotomy under local anesthesia. The correction of right ectopic canine was achieved through 2 stages. First, dento-osseous osteotomy on palatal side was performed...
November 21, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27871714/surgical-and-orthodontic-management-of-maxillary-canine-lateral-incisor-transpositions
#11
Teresa Lorente, Carmen Lorente, Paula G Murray, Pedro Lorente
Transposition of the maxillary canine and the lateral incisor is a complex dental anomaly to treat. The difficulty increases if the treatment aims to correct the transposition. These case reports describe 2 patients with transposition of the maxillary lateral incisor and canine. The first case involves bilateral incomplete transpositions, and the second is a complete transposition. The radiographic appearance of the canine was similar in the 2 patients. However, the treatments were distinct because of the 3-dimensional positions of the teeth...
November 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27871255/root-resorption-during-orthodontic-treatment-with-self-ligating-or-conventional-brackets-a-systematic-review-and-meta-analysis
#12
Jianru Yi, Meile Li, Yu Li, Xiaobing Li, Zhihe Zhao
BACKGROUND: The aim of this study was to compare the external apical root resorption (EARR) in patients receiving fixed orthodontic treatment with self-ligating or conventional brackets. METHODS: Studies comparing the EARR between orthodontic patients using self-ligating or conventional brackets were identified through electronic search in databases including CENTRAL, PubMed, EMBASE, China National Knowledge Infrastructure (CNKI) and SIGLE, and manual search in relevant journals and reference lists of the included studies until Apr 2016...
November 21, 2016: BMC Oral Health
https://www.readbyqxmd.com/read/27868202/the-potential-risks-of-orthodontic-therapy-a-critical-review-and-conceptual-framework
#13
REVIEW
Morgan Wishney
The review examines some of the potential risks of orthodontic therapy along with their evidence base. The risks of orthodontic treatment include periodontal damage, pain, root resorption, tooth devitalisation, temporomandibular disorder, caries, speech problems and enamel damage. These risks can be understood to arise from a synergy between treatment and patient factors. In general terms, treatment factors that can influence risk include appliance type, force vectors and duration of treatment whilst relevant patient factors are both biological and behavioral...
November 21, 2016: Australian Dental Journal
https://www.readbyqxmd.com/read/27858073/-torque-control-evaluated-by-lateral-cephalometric-radiography-and-cone-beam-ct-after-retraction-of-the-upper-anterior-teeth
#14
Xue Yang, Yu-Fen Qian
PURPOSE: To investigate the relationship between torque control and movement type of the teeth and to investigate the correlation between reconstruction of the alveolar bone and retraction of the upper anterior teeth. METHODS: Cephalograms of pre-treatment and post-treatment of 111 cases and cone-beam computed tomography of pre-retraction and post-retraction of 7 cases were collected. The inclination degree of the upper anterior teeth, the horizontal and vertical displacement of edge and apex,and the thickness of the alveolar bone at the apex level were measured...
August 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/27857773/a-case-report-of-delayed-repositioning-of-intruded-permanent-maxillary-central-incisors-accompanied-by-complicated-crown-fractures-a-2-year-follow-up
#15
Azade Rafiee, Hamid Moradian, Maryam Ayatollahi
Intrusive luxation is the most severe type of dental injury with a complex healing sequence. Pulp necrosis, root resorption (surface, inflammatory and replacement resorption), and defects in marginal periodontal bone healing are the main complications. Treatment strategies can be either active, by repositioning (surgical or orthodontic extrusion), or passive, by spontaneous re-eruption based on the thorough evaluation of the case. This paper reports a case of delayed repositioning of severely intruded permanent maxillary central incisors accompanied by complicated crown fractures after 3 months...
September 2016: Dental Research Journal
https://www.readbyqxmd.com/read/27857514/the-use-of-bioceramics-in-endodontics-literature-review
#16
REVIEW
Stefan Jitaru, Ioana Hodisan, Lucia Timis, Anamaria Lucian, Marius Bud
BACKGROUND AND AIM: Bioceramics are ceramic compounds obtained both in situ and in vivo, by various chemical processes. Bioceramics exhibit excellent biocompatibility due to their similarity with biological materials, like hydroxyapatite. Bioceramics and multi-substituted hydroxyapatite or similar compounds have the ability to induce a regenerative response in the organism. The aim of this paper is to make a literature review on the main bioceramic materials currently used in endodontics and on their specific characteristics...
2016: Clujul Medical (1957)
https://www.readbyqxmd.com/read/27853499/effect-of-voxel-size-on-detection-of-external-root-resorption-defects-using-cone-beam-computed-tomography
#17
Sima Nikneshan, Solmaz Valizadeh, Anahita Javanmard, Leila Alibakhshi
BACKGROUND: Selecting a voxel size that yields minimal radiation dose with no significant compromise of the diagnostic accuracy of cone beam computed tomography (CBCT) is particularly important. OBJECTIVES: This study aimed to assess the effect of voxel size on detection accuracy of simulated external root resorption defects using NewTom CBCT system. MATERIALS AND METHODS: In this diagnostic study, the roots of 90 extracted human central incisors were hypothetically divided into cervical, middle, and apical thirds...
July 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27847652/orthodontic-protocol-using-mini-implant-for-class-ii-treatment-in-patient-with-special-needs
#18
Fernando Pedrin Carvalho Ferreira, Anderson Paulo Barbosa Lima, Eliana de Cássia Molina de Paula, Ana Claudia de Castro Ferreira Conti, Danilo Pinelli Valarelli, Renata Rodrigues de Almeida-Pedrin
Improving facial and dental appearance and social interaction are the main factors for special needs (SN) patients to seek orthodontic treatment. The cooperation of SN patients and their parents is crucial for treatment success. Objective. To show through a case report the satisfactory results, both functional and esthetic, in patients with intellectual disability, congenital nystagmus, and severe scoliosis. Materials Used. Pendulum device with mini-implants as anchorage unit. Results. Improvement of facial and dental esthetics, correction of Class II malocclusion, and no root resorption shown in the radiographic follow-up...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27847138/a-comparative-evaluation-of-the-effect-of-the-addition-of-pachymic-acid-on-the-cytotoxicity-of-4-different-root-canal-sealers-an-in%C3%A2-vitro-study
#19
Senthamilselvan Arun, Vidhya Sampath, Sekar Mahalaxmi, Kothandaraman Rajkumar
INTRODUCTION: Root canal sealers exhibit varying degrees of cytotoxicity to periapical tissues. This in turn results in inflammation, delayed wound healing, and even bone resorption. This study aimed to explore the effect of the addition of an antioxidant like pachymic acid on the cytotoxicity of 4 root canal sealers, namely, Tubliseal (Kerr, Romulus, MI), a zinc oxide eugenol-based sealer; AH Plus (Dentsply De Trey GmbH, Konstanz, Germany), an epoxy resin-based sealer; Sealapex (Kerr), a calcium hydroxide-based sealer; and EndoREZ (Ultradent Products, South Jordan, UT), a methacrylate resin-based sealer...
November 12, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27845274/potential-applications-of-antimicrobial-peptides-and-their-mimics-in-combating-caries-and-pulpal-infections
#20
REVIEW
Sui Mai, Matthew T Mauger, Li-Na Niu, Jonathan B Barnes, Solon Kao, Brian E Bergeron, Jun-Qi Ling, Franklin R Tay
: Antimicrobial peptides (AMPs) are short cationic host-defense molecules that provide the early stage of protection against invading microbes. They also have important modulatory roles and act as a bridge between innate and acquired immunity. The types and functions of oral AMPs were reviewed and experimental reports on the use of natural AMPs and their synthetic mimics in caries and pulpal infections were discussed. Natural AMPs in the oral cavity, predominantly defensins, cathelidin and histatins, possess antimicrobial activities against oral pathogens and biofilms...
November 11, 2016: Acta Biomaterialia
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