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láser doppler flowmetry orthodontics

Fidan Alakus Sabuncuoglu, Seyda Ersahan
AIM: To evaluate the effects of maxillary canine retraction on pulpal blood flow (PBF) in humans as recorded by laser Doppler flowmetry (LDF). METHODS: Maxillary canines of 24 participants were divided into two groups (n = 12 each). Teeth in the study group underwent maxillary canine retraction using mini-implants as anchorage for approximately 4 months, with 100 g of force applied via coil springs. Subjects in the control group received no orthodontic treatment...
August 2016: Acta Odontologica Scandinavica
Seyda Ersahan, Fidan A Sabuncuoglu
INTRODUCTION: In this study, we aimed to evaluate and compare blood-flow changes in the pulp tissues of maxillary molars over a 6-month period after orthodontic intrusion using different magnitudes of force. METHODS: Twenty patients were randomly divided into 2 groups (n = 10) according to the amount of intrusive force applied. An intrusive force of either 125 g (light) or 250 g (heavy) was applied to the overerupted maxillary first molars using mini-implants; no force was applied to the contralateral molars...
July 2015: American Journal of Orthodontics and Dentofacial Orthopedics
Fidan Alakus Sabuncuoglu, Seyda Ersahan
INTRODUCTION/OBJECTIVE: The aim of this prospective study was to evaluate the effects of maxillary first molar intrusion on pulpal blood flow (PBF) in humans as recorded by laser Doppler flowmetry (LDF). MATERIALS AND METHODS: Maxillary first molars of 16 participants were divided into two groups. In the study group, 20 teeth in 10 participants were subjected to an intrusive force of 100 g delivered from mini-implants for 6 months. A control group of 6 subjects (12 teeth) received no orthodontic treatment...
November 2014: Australian Orthodontic Journal
Fidan Alakus Sabuncuoglu, Seyda Ersahan
AIM: The aim of this clinical study was to identify changes in pulpal blood flow (PBF) in human central incisors resulting from short- and long-term intrusive orthodontic forces from mini-implants. MATERIALS AND METHODS: A total of 40 sound upper central and lateral incisors in 20 patients scheduled for intrusion for orthodontic reasons were divided into two groups. From each group, 20 teeth were subjected to intrusive force from mini-implants (Group 1 = Light Force: 40 g; Group 2 = Heavy Force: 120 g), whereas the remaining 20 contralateral teeth were not subjected to forces from mini-implants and served as controls...
October 2014: Acta Odontologica Scandinavica
Alvaro Wagner Rodrigues Salles, Adriana Mirian Cotrim Salles, Gessé Eduardo Calvo Nogueira
Objective. The purpose of this study was to examine alterations in blood-flow signals (BFS) from human teeth during an alignment and leveling phase (superelastic wire 0.014'') in a clinical orthodontic treatment using laser doppler flowmetry (LDF). Materials and Methods. Recordings were made in 12 maxillary left central incisors. The basal value of the BFS from each tooth (without orthodontic forces) was compared with the corresponding values of BFS during four periods of observation: 20 minutes, 48 hours, 72 hours, and one month after the activation of the orthodontic appliance...
2013: ISRN Dentistry
P Banthitkhunanon, S Chintakanan, S Wanachantararak, N Vongsavan, B Matthews
OBJECTIVE: To determine the effect of enamel and dentine thickness on laser Doppler blood-flow (LDF) signals recorded from dental pulp. DESIGN: Observations were made on 18 human premolars that had been extracted from young patients during orthodontic treatment. The apical 2/3 of the root was cut off and the remaining pulp removed. Blood flow signals were recorded from the buccal surface of the crown with a laser Doppler flow metre while dilute blood was pumped at 10 ml/min...
November 2013: Archives of Oral Biology
E Chen, M Goonewardene, P Abbott
AIM: To investigate the effect of orthognathic surgery, in particular genioplasty, on pulp sensibility and pulp blood flow (PBF). METHODOLOGY: Pulp blood flow monitoring and CO(2) pulp sensibility testing were performed on 101 mandibular anterior teeth from 17 subjects who received mandibular bilateral sagittal split osteotomy (BSSO) with or without genioplasty and other maxillary surgical procedures combined with orthodontic treatment. A laser Doppler flowmeter was used to monitor PBF using customized acrylic splints for each subject...
March 2012: International Endodontic Journal
Hasan Babacan, Cenk Doruk, A Altug Bicakci
OBJECTIVE: To determine the pulpal blood flow (PBF) changes in anchorage teeth associated with the high forces of a rapid maxillary expansion (RME) appliance. MATERIALS AND METHODS: The study was performed with 14 girls and 7 boys for a total of 21 patients between 10 and 15 years of age (mean, 13.1 +/- 1.39 years). A modified acrylic bonded RME appliance was used as an expansion appliance. Laser Doppler flowmetry was used for the pulpal perfusion measurements. Records were taken from 42 upper central incisors, 28 canines, and 42 first molars at the following time intervals: just before expansion (T1); at the first week of expansion (T2); at the end of the expansion process (T3); and at the third (T4), seventh (T5), and 12th weeks of retention (T6)...
November 2010: Angle Orthodontist
A Fux Noy, A Fuks
Accurate assessment of pulp status is one of the greatest diagnostic challenges in clinical practice. This may be further complicated in children and adolescent where the practitioner is faced with different situations such as: primary teeth, developing permanent dentition, traumatized teeth, patients undergoing orthodontic treatment. In addition, the dentist is frequently faced with young children who have limited ability to recall a pain history or cooperate with the test itself. A variety of pulp testing approaches exist, and there may be a confusion as to their validity in different clinical situations...
January 2010: Journal of the Israel Dental Association
H Jafarzadeh
Vascular supply is the most accurate marker of pulp vitality. Tests for assessing vascular supply that rely on the passage of light through a tooth have been considered as possible methods for detecting pulp vitality. Laser Doppler flowmetry (LDF), which is a noninvasive, objective, painless, semi-quantitative method, has been shown to be reliable for measuring pulpal blood flow. The relevant literature on LDF in the context of endodontics up to March 2008 was reviewed using PubMed and MEDLINE database searches...
June 2009: International Endodontic Journal
Rüdiger Emshoff, Robert Kranewitter, Silvia Brunold, Klaus Laimer, Burghard Norer
OBJECTIVES: Laser Doppler flowmetry (LDF) is a noninvasive method to assess pulpal blood-flow (PBF). The purpose of this study was (1) to test whether Le Fort I (LF-I) osteotomy may show tooth type-related effects on LDF measurements, and (2) to investigate whether LF-I and tooth type may predict adverse PBF outcomes. MATERIAL AND METHODS: PBF was recorded bilaterally in maxillary incisors, canines, and first premolars in a surgical group of patients who underwent a segmented (n = 14) or nonsegmented LF-I osteotomy (n = 12), and in a nonsurgical group of control subjects (n = 12) who did not undergo orthodontic treatment...
March 2008: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
R Emshoff, I Moschen, H Strobl
Splinting of traumatically displaced permanent teeth has been described as an effective modality in the treatment of patients with dental injuries. The purpose of this study was to (i) investigate whether dental injury diagnosis may predict adverse outcomes occurring 96 weeks after splint removal, and (ii) evaluate whether the severity of adverse outcome is related to laser Doppler flowmetry (LDF) measurements of pulpal blood flow (PBF). In 206 trauma patients, 273 permanent maxillary incisors treated by repositioning and splinting, and the respective contralateral homologous control teeth were investigated clinically and radiographically, and by LDF to assess local PBF values...
February 2008: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Yuichi Konno, Takayoshi Daimaruya, Masahiro Iikubo, Reiko Kanzaki, Ichiro Takahashi, Junji Sugawara, Takashi Sasano
INTRODUCTION: We have successfully treated skeletal open bite by intruding posterior teeth with the skeletal anchorage system. Our aim in this study was to morphologically and hemodynamically evaluate the changes in pulp tissues when molars are radically intruded. METHODS: The mandibular fourth premolars of 9 adult beagle dogs were divided into 3 groups: a sham operated group (n = 6, 3 dogs), 4-month intrusion group (n = 6, 3 dogs), and a further 4-month retention group (n = 6, 3 dogs)...
August 2007: American Journal of Orthodontics and Dentofacial Orthopedics
Robert S Crawford, Faraz F Hashmi, John E Jones, Hassan Albadawi, Michael McCormack, Kyle Eberlin, Fateh Entabi, Marvin D Atkins, Mark F Conrad, W Gerald Austen, Michael T Watkins
The McGivney hemorrhoidal ligator (MHL), a band designed to cause tissue necrosis, is the preferred experimental tool to create hindlimb ischemia-reperfusion (I/R) injury in rodents. This report defines and compares the ex vivo band tension exerted by MHL and orthodontic rubber bands (ORBs) along with select in vivo characteristics of I/R. As to method, ex vivo band tension was measured over relevant diameters using a tensiometer. In vivo assessment of murine limb perfusion during ischemia with ORB and MHL was compared using laser Doppler imaging and measurement of wet weight-to-dry weight ratio...
February 2007: American Journal of Physiology. Heart and Circulatory Physiology
H Strobl, I Moschen, I Emshoff, R Emshoff
Laser Doppler flowmetry (LDF) is a non-invasive method to assess pulpal blood-flow (PBF). Dental injury has been associated with significant PBF reduction. The purpose of this study was to assess whether (i) the type of luxation trauma may affect PBF measurements and (ii) whether luxation type-related measurements may show short- and long-term changes of PBF values. In 41 trauma patients, 69 maxillary incisor treated by repositioning and splinting, and the respective contralateral homologous tooth were investigated by LDF to assess local PBF values...
April 2005: Journal of Oral Rehabilitation
S Soo-ampon, N Vongsavan, M Soo-ampon, S Chuckpaiwong, B Matthews
Records of pulpal blood flow obtained from human teeth with a laser Doppler flowmeter include a very large component derived from periodontal and other tissues outside the pulp, but this contamination can be reduced by covering the surrounding tissues with opaque rubber dam. The present experiments were carried out to determine what proportion of the signal obtained with this dam in place is derived from non-pulpal tissues. Recordings were made from 22 healthy, intact upper incisors in 14 individuals (aged 22-40 years) with and without dam under the following conditions: from the intact teeth, after local anaesthesia (LA) and the preparation of a deep cavity in the incisal third of the labial surface of the tooth, and after removal of the pulp and arrest of bleeding...
May 2003: Archives of Oral Biology
Nobuyoshi Imamura, Shunsuke Nakata, Akihiko Nakasima
Pulsation originating from the vascular system of the periodontal ligament (PDL) is apparently synchronized with the heartbeat. As periodontal pulsation causes pulsatile tooth vibration, it might be possible to evaluate it indirectly by measuring tooth vibration. Periodontal pulsation has been found to be dependent on blood flow and blood pressure in the PDL. Heavy orthodontic force is known to reduce blood flow and decrease the amplitude of the pulsation. The purpose now was to examine (1). the magnitude of the experimental orthodontic force that will impair PDL blood flow; and (2)...
August 2002: Archives of Oral Biology
Yuki Sano, Motohide Ikawa, Junji Sugawara, Hiroshi Horiuchi, Hideo Mitani
The purpose of this study was to examine the effect of continuous intrusive force application on human pulpal blood flow (PBF). Recordings were made of 13 vital upper left central incisors in 13 healthy participants (experimental group, n = 8; control group, n = 5) who had clinically healthy tooth crowns and periodontal tissues. PBF was recorded by means of a laser Doppler flow meter (LDF) with an opaque rubber dam applied to the teeth. The basal blood flow in the pulp (BBFP) was compared during three observation periods: (1) before orthodontic archwire engagement; (2) during wire engagement (control group: no application of force; experimental group: continuous intrusive force of 0...
April 2002: European Journal of Orthodontics
T Justus, B L Chang, D Bloomquist, D S Ramsay
PURPOSE: The occurrence of a hypervascular period during healing after orthognathic surgery has not been investigated rigorously in human pulpal and gingival tissues. This study used laser Doppler flowmetry to investigate the effects of Le Fort I osteotomy on maxillary pulpal and gingival blood flow between the first and third week after surgery. PATIENTS AND METHODS: Pulpal blood flow was recorded in maxillary incisors, and gingival blood flow was assessed from a site slightly apical to the interdental papilla of the maxillary central incisors in 10 patients who were undergoing a Le Fort I osteotomy, 10 patients who were undergoing a mandibular osteotomy, and 10 nonsurgical control subjects who were not undergoing orthodontic treatment...
January 2001: Journal of Oral and Maxillofacial Surgery
J G Buckley, M L Jones, M Hill, A W Sugar
The objective of this study was to evaluate the use of the Laser Döppler Flowmeter (LDF) in the measurement of pulpal blood flow following orthognathic surgery and to conduct an initial study of the effects of a Le Fort I osteotomy on the pulpal blood flow of the maxillary central incisors. The design consisted of a preliminary prospective controlled consecutive clinical trial undertaken at the Orthodontic Clinic, University Dental Hospital NHS Trust, Wales, 1994. The study group consisted of 15 consecutive patients who were to receive a standard advancement Le Fort I osteotomy...
March 1999: British Journal of Orthodontics
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