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https://www.readbyqxmd.com/read/29457311/bicuspid-axial-wall-height-effect-on-cad-cam-crown-fracture-mode-on-preparations-containing-advanced-total-occlusal-convergence
#1
Matthew Miller, Nicholas DuVall, John Brewster, Michael N Wajdowicz, Ashley Harris, Howard W Roberts
PURPOSE: To evaluate bicuspid axial wall height effect on the fracture mode of adhesively luted, all-ceramic CAD/CAM crowns with a 20° total occlusal convergence (TOC). MATERIALS AND METHODS: Recently extracted premolars were randomly divided into 4 groups (n = 12) with all-ceramic crown preparations accomplished using a high-speed handpiece inserted into a milling device. Specimens were prepared containing occlusogingival axial wall heights of 3, 2, and 1 mm as well as a group containing a flat preparation surface with no axial wall height...
February 18, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29455306/dentinal-tubule-sealing-effects-of-532-nm-diode-pumped-solid-state-laser-gallic-acid-fe-3-complex-and-three-commercial-dentin-desensitizers
#2
Soram Oh, Yu Gu, Hiran Perinpanayagam, Yeon-Jee Yoo, Yoon Lee, Ryun Kyung Kim, Seok Woo Chang, Jongho Lee, Qiang Zhu, Kee Yeon Kum
The purpose of this study was to compare dentinal tubule sealing effects of a 532-nm diode-pumped solid-state (DPSS) laser, gallic acid/Fe3+ complex, and three commercially available dentin desensitizers. Human premolars (n = 44) extracted for orthodontics had standardized cervical cavities prepared, etched (37% phosphoric acid) and randomly assigned to either a control (n = 4), or one of five treatment groups (n = 8/group). Desensitizing treatments were either a 532-nm DPSS laser, gallic acid/Fe3+ complex, oxalate-based Super Seal™ (SS), DIO™ Enamel Coating Pen Pro Tooth (Dio), or adhesive-type Hybrid Coat™ (HC)...
February 17, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29454891/a-new-procedure-for-processing-extracted-teeth-for-immediate-grafting-in-post-extraction-sockets-an-experimental-study-in-american-fox-hound-dogs
#3
José Luis Calvo Guirado, Pilar Cegarra Del Pino, Lari Sapoznikov, Rafael Arcesio Delgado Ruíz, Manuel Fernández Dominguez, Sérgio Alexandre Gehrke
OBJECTIVES: To investigate freshly extracted dental particulate used to graft post-extraction sockets in dogs, comparing new bone formation at experimental and control sites. MATERIAL AND METHODS: Bilateral premolars P2, P3, P4 and first mandibular molars were extracted atraumatically from six American Fox Hound dogs. The teeth were ground immediately using a 'Smart Dentin Grinder.' The dentin particulate was sieved to ensure a grain size of 300-1200μm and immersed in an alcohol cleanser to dissolve organic debris and bacteria, followed by washing in sterile saline buffer solution...
February 15, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29454369/evaluation-of-piezocision-and-laser-assisted-flapless-corticotomy-in-the-acceleration-of-canine-retraction-a-randomized-controlled-trial
#4
Alaa M H Alfawal, Mohammad Y Hajeer, Mowaffak A Ajaj, Omar Hamadah, Bassel Brad
BACKGROUND: To evaluate the effectiveness of two minimally invasive surgical procedures in the acceleration of canine retraction: piezocision and laser-assisted flapless corticotomy (LAFC). METHODS: Trial design: A single-centre randomized controlled trial with a compound design (two-arm parallel-group design and a split-mouth design for each arm). PARTICIPANTS: 36 Class II division I patients (12 males, 24 females; age range: 15 to 27 years) requiring first upper premolars extraction followed by canine retraction...
February 17, 2018: Head & Face Medicine
https://www.readbyqxmd.com/read/29453788/hard-and-soft-tissue-changes-around-implants-activated-using-plasma-of-argon-a-histomorphometric-study-in-dog
#5
Luigi Canullo, Marco Tallarico, Daniele Botticelli, Karol Alí Apaza Alccayhuaman, Evandro Carneiro Martins Neto, Samuel Porfirio Xavier
OBJECTIVE: To histologically assess the hard and soft tissue changes after insertion of cleaned and activated titanium implants using plasma of argon. MATERIALS AND METHODS: Eight dogs were included in this study. The mandibular premolars and first molars were extracted. For each hemi-mandible, four implants, 7 mm long and 3.3 mm of diameter, with a ZirTi surface were used. The surface of two implants was randomly treated with argon plasma (test), while the other two implants were left untreated (control)...
February 16, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29448262/assessment-of-location-of-the-mandibular-canal-correlation-between-panoramic-and-cone-beam-computed-tomography-measurements
#6
Felix Bertram, Stefan Bertram, Ansgar Rudisch, Rüdiger Emshoff
PURPOSE: To compare panoramic and cone beam computed tomography (CBCT) determinations of implant-to-mandibular canal (MC) dimensions in mandibular regions posterior to the mental foramen and to investigate whether factors such as gender, age, region, and vertical dimension influence correlation between the two techniques. MATERIALS AND METHODS: A retrospective analysis was carried out in 64 consecutive adult patients (42 females, 22 males; average age 57.1 ± 13...
February 15, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29446438/three-dimensional-3d-geometric-morphometric-analysis-of-human-premolars-to-assess-sexual-dimorphism-and-biological-ancestry-in-australian-populations
#7
Robin Yong, Sarbin Ranjitkar, Dimitra Lekkas, Demetrios Halazonetis, Alistair Evans, Alan Brook, Grant Townsend
OBJECTIVES: This study aimed to investigate size and shape variation of human premolars between Indigenous Australians and Australians of European ancestry, and to assess whether sex and ancestry could be differentiated between these groups using 3D geometric morphometrics. MATERIALS AND METHODS: Seventy dental casts from each group, equally subdivided by sex, were scanned using a structured-light scanner. The 3D meshes of upper and lower premolars were processed using geometric morphometric methods...
February 15, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29446436/the-wits-atlas-a-black-southern-african-dental-atlas-for-permanent-tooth-formation-and-emergence
#8
Temitope A Esan, Lynne A Schepartz
Current dental maturity charts, such as the widely applied London atlas, do not take into consideration advanced tooth emergence and formation patterns observed in children of African ancestry. The result is inaccurate age estimation in Southern Africa, a region where there is great forensic and anthropological need for reliable age estimation. OBJECTIVES: To develop a population-specific atlas of permanent tooth emergence and formation for age estimation of Black Southern Africans. MATERIALS AND METHODS: Using data from a cross-sectional study of 642 school children aged 5-20 years, panoramic radiographs taken during routine dental examination in a mobile treatment van were analyzed using the Demirjian method of eight (A-H) tooth formation stages...
February 15, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29446204/an-up-to-17-year-follow-up-retrospective-analysis-of-a-minimally-invasive-flapless-approach-18-945-implants-in-7783-patients
#9
Philip Jesch, Wolfgang Jesch, Emanuel Bruckmoser, Mischa Krebs, Tibor Kladek, Rudolf Seemann
BACKGROUND: This study investigates gender, age, jaw, implant position, loading protocol (immediate vs delayed), smoking, and type of surgery (punch vs flap) as influential factors of implant survival in a large patient collective. PURPOSE: To evaluate the survival rates of implants in patients using a mucoperiosteal punch for flapless implantation in the majority of cases in order to evaluate its medical efficacy and safety. MATERIALS AND METHODS: Between 1994 and 2015 all patients with complete data treated at the Wienerberg Dental Clinic, Vienna, Austria, were included and statistically analyzed in Cox proportional hazard (PH) models...
February 15, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29445072/molar-eruption-and-identification-of-the-eastern-grey-kangaroo-macropus-giganteus-at-different-ages
#10
Nobuhide Kido, Sohei Tanaka, Yuko Wada, Sumito Sato, Tomoko Omiya
To treat dental disorders and estimate age, it is important that veterinarians understand teeth eruption sequence for the animal in question. Few dental images of the eastern grey kangaroo have been published. In the present study, radiographic imagings of 29 kangaroos, ranging in age from 12 months to 10 years 9 months, was used to surveil the replacement of premolars and the eruption of molars. These images revealed eruption patterns in five stages, while the second and third deciduous premolars were shed non-systematically...
February 15, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29442088/morphological-and-morphometric-analysis-of-accessory-mental-foramen-in-dry-human-mandibles-of-south-indian-population
#11
J Rajkohila, Priyanka Daniel, Sakunthala Ambikaipakan, Suganthy Rabi
Background: Mental foramen (MF) is an important landmark for administration of local anesthesia in surgical procedures involving the mandible. Additional mental foramina, called accessory mental foramina (AMF) transmitting branches of mental nerve, have been reported. Detection of AMFs in presurgical imaging may reduce postoperative pain in dental surgical procedures. Aim: The aim of the study was to study the incidence and morphometric analysis of accessory MF in the dry human mandibles of South Indian population...
January 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/29435206/bone-healing-in-extraction-sockets-covered-with-collagen-membrane-alone-or-associated-with-porcine-derived-bone-graft-a-comparative-histological-and-histomorphometric-analysis
#12
Renzo Guarnieri, Luca Testarelli, Luigi Stefanelli, Francesca De Angelis, Francesca Mencio, Giorgio Pompa, Stefano Di Carlo
Objectives: The present paper reports data of a randomized study aimed to analyse and compare the histologic and histomorphometric aspects of bone healing in extraction sites covered with collagen membrane alone or associated with porcine-derived bone graft. Material and Methods: Thirty patients, with single extraction sockets without severe bone wall defects in the premolar/molar region, were included. Ten extraction sockets were grafted with porcine-derived bone and covered with collagen membrane (group 1), 10 sites were covered with collagen membrane alone (group 2), and 10 sites healed spontaneously (group 3)...
October 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/29434797/effect-of-different-surface-treatments-and-retainer-designs-on-the-retention-of-posterior-pd-ag-porcelain-fused-to-metal-resin-bonded-fixed-partial-dentures
#13
Xiwen Chen, Yixin Zhang, Jinru Zhou, Chenfeng Chen, Zhimin Zhu, Lei Li
The aim of this study was to investigate the adhesive property of palladium-silver alloy (Pd-Ag) and the simulated clinical performance of Pd-Ag porcelain-fused-to-metal (PFM), resin-bonded, fixed partial dentures (RBFPDs). A total of 40 Pd-Ag discs (diameter=5 mm) were prepared and divided into the following four groups (n=10): a) No sandblasting, used as a control; and b, 50 µm; c, 110 µm; and d, 250 µm aluminum oxide (Al2O3) particles, respectively. Another 50 discs were pre-sandblasted and divided into five groups (n=10) subjected to different treatments: e) Sandblasting, used as a control; f) silane; g) alloy primer; h) silica coating + silane and i) silica coating + alloy primer...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29430102/comparative-evaluation-of-remineralizing-potential-of-fluoride-using-three-different-remineralizing-protocols-an-in-vitro-study
#14
Rahul Rao, Ashish Jain, Meenakshi Verma, Deepak Langade, Amol Patil
Background: Remineralization of noncavitated enamel is dependent on the bioavailability of calcium, phosphate, and hydroxyl ions in saliva. However, it is enhanced by the presence of fluoride. This study compared the remineralizing potential of three different topical fluoride agents. Materials and Methods: Fifteen extracted premolars were selected for the study. The crown of each tooth was longitudinally sectioned buccolingually and mesiodistally using a diamond disc so as to obtain sixty specimens which were embedded in acrylic molds...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29430095/comparative-evaluation-of-effect-of-rotary-and-reciprocating-single-file-systems-on-pericervical-dentin-a-cone-beam-computed-tomography-study
#15
Priyanka Ramdas Zinge, Jayaprakash Patil
Aim and Objective: The aim of this study is to evaluate and compare the effect of one shape, Neolix rotary single-file systems and WaveOne, Reciproc reciprocating single-file systems on pericervical dentin (PCD) using cone-beam computed tomography (CBCT). Materials and Methods: A total of 40 freshly extracted mandibular premolars were collected and divided into two groups, namely, Group A - Rotary: A1 - Neolix and A2 - OneShape and Group B - Reciprocating: B1 - WaveOne and B2 - Reciproc...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29430094/effect-of-ultrasonic-activation-of-photosensitizer-dye-temoporfin-foscan-on-antimicrobial-photodynamic-therapy-an-ex-vivo-study
#16
Aleem Mohammad, Srinidhi V Ballullaya, Jayaprakash Thumu, Sohani Maroli, Pushpa Shankarappa
Aim: The aim of this study is to evaluate the effectiveness of ultrasonic activation of photosensitizer (PS) drug Foscan in the elimination of endodontic pathogen from root canal system. Materials and Methods: The minimal bactericidal concentration of "Foscan" was determined using disc diffusion and broth dilution method. Forty-eight extracted single-rooted premolars with periapical pathology were used for the study. After access opening, the first microbial sample was taken...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29430092/comparative-evaluation-of-the-amount-of-debris-extruded-apically-using-conventional-syringe-passive-ultrasonic-irrigation-and-endoirrigator-plus-system-an-in-vitro-study
#17
Vidhi Prabhakar Shetty, Balaram Damodar Naik, Amit Kashinath Pachlag, Mahantesh Mrityunjay Yeli
Aim: The aim of this study is to compare the effects of conventional syringe, passive ultrasonic irrigation (PUI), and EndoIrrigator Plus on the amount of apically extruded debris. Materials and Methods: Thirty extracted human mandibular premolars were selected and randomly assigned to three groups (n = 10). The root canals were irrigated with conventional syringe, PUI, and EndoIrrigator Plus. Sodium hypochlorite was used as an irrigant, and debris was collected in a previously described experimental model (Myers and Montgomery 1991)...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29429056/histological-healing-after-nonsurgical-periodontal-treatment-with-enamel-matrix-derivatives-in-canine-experimental-periodontitis
#18
Ammar Shujaa Addin, Tatsuya Akizuki, Takanori Matsuura, Shu Hoshi, Takahiro Ikawa, Kiichi Maruyama, Wataru Ono, Shunsuke Fukuba, Yuichi Izumi
The histological outcomes after nonsurgical periodontal treatment with enamel matrix derivatives (EMD) remain controversial. The present study evaluated periodontal wound healing after scaling and root planing (SRP) with subgingival application of EMD for treatment of experimental periodontitis. Periodontal breakdown was induced by applying silk ligatures around mandibular third and fourth premolars of six beagle dogs until radiographic bone loss progressed to approximately half of the root length. Probing pocket depth (PPD) and clinical attachment level (CAL) were proximally measured 2 weeks after ligature removal (baseline)...
February 10, 2018: Odontology
https://www.readbyqxmd.com/read/29426644/targeted-endodontic-microsurgery-a-novel-approach-to-anatomically-challenging-scenarios-using-3-dimensional-printed-guides-and-trephine-burs-a-report-of-3-cases
#19
C Michelle Giacomino, Jarom J Ray, James A Wealleans
Endodontic microsurgery (EMS) techniques have increased success rates over traditional approaches. Despite surgical advances, anatomically challenging scenarios can preclude EMS in certain cases. The aim of this article was to introduce targeted EMS, which uses 3-dimensional-printed surgical guides (3DSGs) and trephine burs to achieve single-step osteotomy, root-end resection, and biopsy in complex cases. In each of 3 cases, a 3DSG with a trephine port was printed using computer-aided design/computer-aided manufacturing implant planning software...
February 6, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29422461/effect-of-green-tea-varnish-on-depth-of-root-caries
#20
Fahimeh Daneshyar, Zahra Khamverdi, Tayebeh Toliat, Mohammad Y Alikhani
AIM: Root caries is a common, debilitating condition particularly in the elderly population, which can lead to tooth loss. Evidence shows that green tea has cariostatic effects. Considering the gap of information on green tea varnish, this study aimed to assess the efficacy of green tea varnish in the prevention of root caries. MATERIALS AND METHODS: This in vitro experimental study was performed on 42 sound premolars. Two layers of acid-resistant nail varnish were applied on root surfaces except for a window of 1 × 4 mm...
February 1, 2018: Journal of Contemporary Dental Practice
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