Surgical extrusion, surgical crown lengthening, and orthodontic extrusion (OE) with circumferential supracrestal fiberotomy (CSF) are reported as effective methods in cases when clinical crowns are destroyed. The aim of these case reports was to evaluate the results of OE+CSF in a canine and a mandibular second molar tooth. Case 1: A 24-year-old male patient was referred with a fracture of the maxillary canine at the subgingival level. After the examinations, OE+CSF was planned. Following leveling-aligning, a mini-screw was placed into the root canal of the canine, and 50 g of extrusive force was applied from the mini-screw to a stainless steel (SS) wire. Case 2: A 67-year-old female patient was referred with a mandibular second molar destroyed at the gingival level. OE+CSF was planned. An extrusive force (50 g) was applied from the segmental SS wire to the hook inserted into the root canal. CSF and root planning (RP) were performed weekly in both patients. Overall, 5 mm of extrusion was achieved for the upper canine after 6 weeks of active extrusion in Case 1. In Case 2, 5 mm of extrusion was achieved after 3 weeks of active extrusion. OE+CSF is an effective and rapid method for the extrusion of teeth with insufficient clinical crown.
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http://dx.doi.org/10.5152/TurkJOrthod.2018.17057 | DOI Listing |
J Funct Biomater
December 2024
Department of Maxillofacial Orthopaedics and Orthodontics, Pomeranian Medical University in Szczecin, Al. Powst. Wlkp. 72, 70111 Szczecin, Poland.
Bacterial infections are a common cause of clinical complications associated with the use of orthodontic microimplants. Biofilm formation on their surfaces and subsequent infection of peri-implant tissues can result in either exfoliation or surgical removal of these medical devices. In order to improve the properties of microimplants, hybrid coatings enriched with silver nanoparticles, calcium, and phosphorus were investigated.
View Article and Find Full Text PDFOrthod Craniofac Res
December 2024
Department of Orthodontics and Oral Facial Genetics, Indiana University School of Dentistry, Indianapolis, Indiana, USA.
Objectives: The aim of this study was to compare the effectiveness of different attachment shapes and locations on the extrusion of the upper left lateral incisor (UL2) using thermoplastic aligners.
Materials And Methods: Seven typodonts were digitally printed with hemi-ellipsoid or rectangular attachments in the incisal, middle or cervical third of the UL2. Five clear aligners were fabricated for each typodont; each was tested twice.
Stomatologiia (Mosk)
December 2024
Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia.
The main principles of management of children with root fractures of permanent teeth in the coronal third are presented using two clinical cases as an example. In the treatment of root fractures in the coronal third, an important condition for success is timely flexible or semi-flexible splinting of the tooth for a sufficiently long period (up to 4 months). In the absence of splinting or significant mobility of the coronal fragment after removal of the splint the probability of pulp necrosis is very high, and the method of choice is treatment with calcium silicate cements with their introduction by orthograde or surgical access.
View Article and Find Full Text PDFBMC Oral Health
December 2024
Department of Pediatric Dentistry, Dental Research Institute, Pusan National University Dental Hospital, 20 Geumo-Ro, Mulgeum-Eup, Yangsan-Si, Gyeongsangnam-Do, 50612, Republic of Korea.
Background: Preservation of a healthy periodontium is critical for the long-term success of restored teeth. In cases of extensive caries, tooth fracture, inadequate crown length, and increased esthetic demands, the restorative margins need to be placed apical to the gingival margin. Violation of the biological width due to dental trauma frequently appears in clinical practice.
View Article and Find Full Text PDFJ Clin Med
November 2024
Department of Cariology, Endodontics and Oral Pathology, School of Dental Medicine, University of Medicine and Pharmacy Iuliu Hatieganu, Str. Motilor 33, 400001 Cluj-Napoca, Romania.
: This study assessed the biomechanical behavior of dental pulp and the neuro-vascular bundle/NVB as well as the ischemic risks during orthodontic movements in a gradual horizontal periodontal breakdown, using five methods and aiming to identify the most accurate one. : Seventy-two models of second lower premolar (from nine patients) were subjected to 3 N of intrusion, extrusion, rotation, tipping, and translation. Five numerical methods, Tresca, Von Mises/VM, Maximum and Minimum Principal, and hydrostatic pressure were used in a total of 1800 numerical simulations.
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