Hagai Hazan-Molina

Technion - Israel Institute of Technology, H̱efa, Haifa, Israel

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Publications (36)37.34 Total impact

  • Hagai Hazan-Molina · Itay Aizenbud · Hana Kaufman · Sorin Teich · Dror Aizenbud
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    ABSTRACT: Shockwave therapy is used in medicine due to its ability to stimulate healing processes. The application of orthodontic force evokes an inflammatory reaction resulting in tooth movement. Shockwave therapy might have an effect on both inflammatory and periodonal ligament cytokine profiles. Our aim was to evaluate the fluctuations of different inflammatory cytokines after orthodontic force induction with and without shockwave therapy. An orthodontic appliance was applied between the rats' molars and incisors. In conjunction with the commencement of orthodontic force, the rats were treated with a single episode of 1000 shock waves and the gingival crevicular fluid was collected for 3 days. The expression and concentration of different cytokines was evaluated by a commercial 4-multiplex fluorescent bead-based immunoassay. The level of all cytokines displayed a similar trend in both shockwave-treated and untreated groups; the concentration peaked on the first day and declined thereafter. In all cases, however, the cytokine levels were smaller in the shockwave-treated than in untreated animals; a significant difference was found for sRANKL and borderline difference for IL-6 on Day 1. We conclude that shockwave therapy during the induction of orthodontic tooth movement influences the expression of inflammatory cytokines.
    No preview · Article · Nov 2015 · Advances in Experimental Medicine and Biology
  • Omri Emodi · Dani Noy · Hagai Hazan-Molina · Dror Aizenbud · Adi Rachmiel
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    ABSTRACT: Introduction: The main points to consider in secondary alveolar bone grafting (ABG) of cleft patients are age at the time of surgery, the type of bone graft, and pre/postorthodontic expansion of the upper jaw. Purpose: The aim of this study is to evaluate the reverse quad-helix (RQH) expander device. Does RQH improve the surgical procedure before ABG? We will evaluate the outcome of the procedure, duration of the operation, hospitalization time, satisfaction of the surgeon with this procedure and the success of the bone graft in the long-term. Patients and methods: We reviewed the medical records of 103 cleft patients who underwent secondary bone grafting at our institution between 2001 and 2012. All patients were treated presurgically with a RQH appliance to expand the cleft area. The following data were recorded for each of the patients: Unilateral/bilateral cleft, surgery time, hospital stay, success/failure, and follow-up. Conclusion: Presurgical orthodontic application of the RQH expander in the cleft area enabled improved anterior expansion rather than posterior expansion. This technique improves access for surgery and bone grafting, the use of RQH facilitates the improved manipulation of the nasal mucosa via direct view due to the wide separation of the alveolar segments in the cleft area. Furthermore, this gap enables improved access for the bone grafting procedure, shortens the surgery time and provides stable maxillary transverse correction.
    No preview · Article · Sep 2015
  • H Hazan-Molina · Aizenbud D Dror
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    ABSTRACT: Hutchinson-Guilford progeria syndrome is an extremely rare condition classified as one of the premature ageing syndromes. This case presents a 16-year-old Israeli female patient, suffering from a variant of Hutchinson-Guilford progeria with a history of treatment with oral biphosphnates. The patient presented with typical cranial and facial features of the syndrome including delayed teeth eruption and root development probably due to insufficient jaw growth and severs retrognatic position of the maxilla and mandible. Orthodontic treatment considerations are described along with those required in light of the previous treatment by oral biphosphonates.All primary teeth were extracted in three appointments while creating as minimal trauma as possible to the surrounding tissue and alveolar bone. For now, the patient refuses to begin the orthodontic treatment course. There are no limitations to conduct any dental procedures in progeria patients, however, extreme caution must be exercised during oral surgery due to the inelasticity of tissues and dermal atrophy. Orthodontic procedure commencement should be early enough to manage the delayed development and eruption of teeth. Patients taking oral biphosphonates should be advised of this potential complication. If orthodontic treatment is considered appropriate, plans should be assessed and modified to include compromises.
    No preview · Article · Mar 2015 · The Journal of clinical pediatric dentistry
  • D. AIZENBUD · H. HAZAN-MOLINA · R. JACOBSON · S. SCHENDEL
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    ABSTRACT: Objective: Dentofacial-deformities are traditionally treated by maxillary and mandibular osteotomies conducted separately or simultaneously. Recently, distraction osteogenesis has become an irreplaceable part of the surgical armamentarium. Our aim is to describe a combined surgical technique of simultaneous maxillary Le-Fort I advancement as a skeletal template for mandibular surgical repositioning by means of bilateral-sagittal-split-osteotomy (BSSO) with a curvilinear distractor based on a preliminary computerized presurgical prediction. Methods: Seven patients, presenting with a large skeletal open bite and severe mandibular retrusion were included. The presurgical procedure included orthodontic preparation and computerized planning. After performance of Le-Fort I maxillary advancement, a BSSO predistraction procedure was initiated. Thereafter, a curvilinear distractor was attached to the osteotomized mandible and the jaw was released allowing the distractor to be expanded freely until it could be fixed to the distal component. A simultaneous curvilinear distraction osteogenesis was then conducted. Lateral cephalometric x-rays, before and after surgery, were traced by plotting different skeletal landmark points and analyzed. Results: The average vertical changes at point I for the maxillary and mandibular incisors and at points A and B were similar (3.14-4.21 mm). However, the average horizontal changes at points I (of the mandibular incisors) and B were almost 5 times larger (14.28 mm and 15 mm, respectively). Conclusion: The described surgical protocol is a useful technique for dentofacial-deformity management by improving the reliability of the distraction and the final occlusion.
    No preview · Conference Paper · Sep 2014
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    ABSTRACT: Objective: The purpose of this study was to evaluate the developmental stage of teeth adjacent to the agenesis site in comparison to their antimeres. Materials and methods: Panoramic views of 39 patients with unilateral dental agenesis and 42 normal controls were evaluated. The dental developmental stage (normal or delayed) of the teeth adjacent to the agenesis site was determined for each patient using the Haavikko's method, while the overall dental age was determined by Becker's method. Results: No statistically significant difference was found in the developmental stage of teeth adjacent to the agenesis, compared to their antimere and to the same teeth in the normal control group. However, the prevalence of cases with no difference in development was almost double for the tooth distal to the agenesis site compared to the tooth mesial to the agenesis site in the hypodontia group (84.6% distal and 43.6% mesial; p < 0.001) and in the control group (83.3% distal and 52.4% mesial; p < 0.002). In most of the cases the tooth distal to the agenesis site was the 1st permanent molar. Conclusions: (1) No difference was found between the developmental stage of teeth adjacent to the agenesis site and their antimeres. (2) Teeth mesial to the agenesis site showed some delay in development compared to teeth distal to the agenesis site, in this study. (3) The 1st molars, which were in most of the cases the distal adjacent tooth to the site of agenesis, showed developmental stability. (4) Additional longitudinal studies are needed to examine the dental developmental pattern in patients with agenesis.
    No preview · Article · Jul 2014 · Acta Odontologica Scandinavica
  • H. HAZAN-MOLINA · A. REZNICK · H. KAUFMAN · D. AIZENBUD
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    ABSTRACT: Objective:This study aimed to investigate PDL's cytokines concentration fluctuations after induction of orthodontic force with and without extracorporeal shock wave therapy in a rat model. Method: An orthodontic appliance was fabricated and applied between the molars and the incisors of rats. . In conjunction with orthodontic force commencement, the rats were treated by a single episode of 1000 shock waves and gingival crevicular fluid was collected for 3 days. The expressions and concentrations of different cytokines were evaluated by a commercial 4-multiplex fluorescent bead-based immunoassay. Every day, during three days, rats were sacrificed and the expression of different inflammatory cytokines was evaluated by immunohistochemical staining. Result: 4-multiplex fluorescent bead-based immunoassay: All cytokines displayed a similar trend in both the shockwave treated and non-treated groups whereby the concentration peaked on the first day and declined thereafter. In all cases the different cytokine concentrations in the shockwave treated group was smaller compared to the non-treated, however a statistical significant differences was found only in regards to sRANKL (p=0.011) and a trend towards statistical significance was demonstrated in IL-6 on day 1 (p=0.065). Immunohistochemical staining: The percentage of cells expressing all inflammatory cytokines during the study's first two days was reduced in a statistically significant manner in the shock wave treated group compared to the non-treated group. On the first day, the percentage of cells expressing IL-1β and RANKL in the compression side peaked in both groups, with a sequential rise in TRAP positive cells' number. Conclusion: The application of shockwave therapy during orthodontic tooth movement influences the expression of the inflammatory cytokines profile and may alternate the periodontal remodeling expected rate.
    No preview · Conference Paper · Jun 2014
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    ABSTRACT: Objective: Traumatic lesion of the lip buccal mucosa may develop due to a repetitive lip sucking habit, secondary to a dental space which opened in the dental in adult patients. The non surgical treatment approach is based on increasing of patient's awareness to the sucking habit along with the creation of a change in the oral and dental surrounding tissues. The following case included a failure to identify a traumatic habit of lower lip sucking, resulting in a buccal mucosa overgrowth. Combined conservative periodontal and orthodontic approach will be presented to address this clinical issue without any need for surgical intervention. Material and methods: 56 year old female patient presented with a complaint of unaesthetic appearance of the intraoral right buccal mucosa of the lower lip at rest position due to an intensive repetitive sucking habit of the right lower lip segment. We initiated a non surgical treatment approach including increasing the patient's awareness to the sucking habit, controlling the periodontal disease and orthodontic treatment to align and level the dental arch and to close the residual space. Result: The soft tissue overgrowth on the lip buccal mucosa almost completely subsided spontaneously as a result of conservative dental and behavioral management without the need for any oral surgery intervention. A 10 years follow-up revealed no repetitive oral mucosa overgrowth, no spaces reopening and no sucking habit redevelopment. Conclusion: Implementation of a morphological correction will assist the patient in breaking the habit and creating an environment that may effectively prevent the reoccurrence of the habit.
    No preview · Article · Jun 2014 · Acta Odontologica Scandinavica
  • Source
    Stephen A Schendel · Hagai Hazan-Molina · Dror Aizenbud
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    ABSTRACT: Dentofacial deformities are traditionally treated by maxillary and mandibular osteotomies conducted separately or simultaneously. Recently, distraction osteogenesis has become an irreplaceable part of the surgical armamentarium, for its ability to induce new bone formation between the surfaces of bone segments that are gradually separated by incremental traction, along with a simultaneous expansion of the surrounding soft-tissue envelope. The aim of this article is to describe a combined surgical technique consisting of simultaneous maxillary Le Fort I advancement and mandibular surgical repositioning by means of bilateral sagittal split osteotomy with a curvilinear distractor based on a preliminary computerized presurgical prediction.
    Full-text · Article · Apr 2014 · Plastic and Reconstructive Surgery
  • D. Aizenbud · M. Zaks · I. Abu-El-Naaj · A. Rachmiel · H. Hazan-Molina

    No preview · Article · Oct 2013 · International Journal of Oral and Maxillofacial Surgery
  • D. Aizenbud · H. Hazan-Molina · S.A. Schendel

    No preview · Article · Oct 2013 · International Journal of Oral and Maxillofacial Surgery
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    ABSTRACT: Objectives: To estimate the prevalence of platybasia in patients with velopharyngeal incompetence (VPI) and its relation with palatal anomalies and syndromes. Design and Settings: Retrospective case analysis. Setting: A university-affiliated hospital. Patients: The VPI patients (n = 366) included five groups with either cleft lip and palate (CLP), cleft palate (CP) only, submucous cleft palate (SMCP), occult submucous cleft palate (OSMCP), or non-CP. The control group (n = 126) comprised healthy, normal-speech individuals. Outcome Measures: The cranial-base angle was measured by lateral cephalometric radiography. The prevalence of platybasia (defined as cranial base angle >= 137 degrees) was estimated and the patient's syndromes were recorded. Results: The prevalence of platybasia was significantly higher in the VPI group (28.7%) than in the normal controls (2.4%) (P < .001). A significant difference (P < .01) was found in the prevalence of platybasia among the five VPI groups: 16.7%, 20.3%, 28.8%, 33.7%, and 40.3% for CLP, CP only, SMCP, OSMCP, and non-CP, respectively. No significant difference was found between the cranial-base angle of VPI patients and of controls and between the cranial-base angle of the five VPI groups. The VPI nonplatybasic patients had a significantly smaller cranial-base angle than normal controls (P < .01). Platybasia was the highest among patients with velocardiofacial syndrome (50%), followed by those with Pierre Robin syndrome (27.3%). Conclusions: Platybasia, which may cause enlargement of the nasopharyngeal space and difficulties in achieving velopharyngeal closure, can be found in high numbers of VPI patients with or without CP. This supports the belief that velopharyngeal anomaly may be part of a more complex craniofacial anomaly influenced by the cranial-base flexure.
    No preview · Article · Sep 2013 · The Cleft Palate-Craniofacial Journal
  • Dror Aizenbud · H Hazan-Molina · M Peled · A Rachmiel
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    ABSTRACT: Cleft-affected patients are characterized by a normal/almost normal posterior maxillary width and a severe anterior constriction of the maxilla in the mixed dentition period. The purposes of this paper were to present: two cases of unilateral cleft-affected patients treated with a reverse quad-helix appliance; and a new method for differential expansion of the premaxillary area of the palatal cleft using a reverse quad-helix expander, thus enabling improved access for the surgeons during secondary bone graft procedures.
    No preview · Article · Aug 2013
  • H. HAZAN-MOLINA · A.Z. REZNICK · H. KAUFMAN · D. AIZENBUD
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    ABSTRACT: Objective: This study aimed to investigate PDL's cytokines concentration fluctuations after induction of orthodontic force with and without extracorporeal shock wave therapy in a rat model. Method: An orthodontic appliance was fabricated and applied between the molars and the incisors of rats. . In conjunction with orthodontic force commencement, the rats were treated by a single episode of 1000 shock waves and gingival crevicular fluid was collected for 3 days. The expressions and concentrations of different cytokines were evaluated by a commercial 4-multiplex fluorescent bead-based immunoassay. Every day, during three days, rats were sacrificed and the expression of different inflammatory cytokines was evaluated by immunohistochemical staining. Result: 4-multiplex fluorescent bead-based immunoassay: All cytokines displayed a similar trend in both the shockwave treated and non-treated groups whereby the concentration peaked on the first day and declined thereafter. In all cases the different cytokine concentrations in the shockwave treated group was smaller compared to the non-treated, however a statistical significant differences was found only in regards to sRANKL (p=0.011) and a trend towards statistical significance was demonstrated in IL-6 on day 1 (p=0.065). Immunohistochemical staining: The percentage of cells expressing all inflammatory cytokines during the study's first two days was reduced in a statistically significant manner in the shock wave treated group compared to the non-treated group. On the first day, the percentage of cells expressing IL-1β and RANKL in the compression side peaked in both groups, with a sequential rise in TRAP positive cells' number. Conclusion: The application of shockwave therapy during orthodontic tooth movement influences the expression of the inflammatory cytokines profile and may alternate the periodontal remodeling expected rate.
    No preview · Conference Paper · Jun 2013
  • Source
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    ABSTRACT: Endodontic treatment of immature permanent teeth with necrotic pulp, with or without apical pathosis, poses several clinical challenges. There is a risk of inducing a dentin wall fracture or extending gutta-percha into the periapical tissue during compaction of the root canal filling. Although the use of calcium hydroxide apexification techniques or the placement of mineral trioxide aggregate as an apical stop has the potential to minimize apical extrusion of filling material, they do little in adding strength to the dentin walls. It is a well-established fact that in reimplanted avulsed immature teeth, revascularization of the pulp followed by continued root development can occur under ideal circumstances. At one time it was believed that revascularization was not possible in immature permanent teeth that were infected. An in-depth search of the literature was undertaken to review articles concerned with regenerative procedures and revascularization and to glean recommendations regarding the indications, preferred medications, and methods of treatment currently practiced. Disinfection of the root canal and stimulation of residual stem cells can induce formation of new hard tissue on the existing dentin wall and continued root development. Although the outcome of revascularization procedures remains somewhat unpredictable and the clinical management of these teeth is challenging, when successful, they are an improvement to treatment protocols that leave the roots short and the walls of the root canal thin and prone to fracture. They also leave the door open to other methods of treatment in addition to extraction, when they fail to achieve the desired result.
    Full-text · Article · Mar 2013 · Journal of endodontics
  • Dror Aizenbud · Marta Zaks · Imad Abu-El-Naaj · Adi Rachmiel · Hagai Hazan-Molina
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    ABSTRACT: BACKGROUND: Tooth autotransplantation has developed into a safe and predictable procedure, which preserves the continuity of the dental arch and the alveolar process and provides an acceptable aesthetic and physiological outcome. AIM: To describe our experience with autotransplantation of the developing mandibular premolar to the iliac crest grafted alveolar cleft as part of the cleft patient's treatment protocol. MATERIAL AND METHODS: Four cleft affected patients were referred to the Orthodontic and Craniofacial Department, Rambam Health Care Campus, Haifa, Israel due to loss of teeth in the cleft area. In all cases, orthodontic closure of the missing teeth space in the maxillary dental arch was considered inappropriate and therefore autotransplantation of the extracted mandibular premolar to the bone-grafted alveolar cleft site was conducted. RESULTS: None of the transplanted teeth in the reported cleft affected patients had signs or symptoms of progressive root pathology, gingival disease or advanced tooth mobility. Long-term clinical follow-up examination revealed improved facial aesthetics and occlusal relationships along with increased self-esteem and welfare of the patients' with no need for future dental restorative treatment. CONCLUSION: Autotransplantation of mandibular premolars should be considered an alternative to prosthodontics in cleft affected patients as an integral part of the cleft patient's treatment protocol.
    No preview · Article · Dec 2012 · Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery
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    Hagai Hazan-Molina · Liran Levin · Shmuel Einy · Dror Aizenbud
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    ABSTRACT: Objective: The aim was to review the literature on aggressive periodontitis diagnosed during or before the initiation of orthodontic treatment and to propose preventive recommendations before, during and after orthodontic treatment. Materials and methods: Literature searches of free text and MeSH terms were performed by using PubMed, Embase and the Cochrane Library and the appropriate studies were selected. The retrieved articles were analyzed and the relevant data was tabulated according to different parameters. Results: A total of 220 articles were found in the preliminary search. Eighteen studies, all case reports, describing 21 cases from this search met all the criteria. The mean age of the reported cases was 21.12 years, all treated with combined periodontal and orthodontic modalities. Most of the reported cases were female. Conclusion: An interdisciplinary dental team must approve the periodontal health prior to and during the course of the orthodontic therapy. In subjects with periodontal pathology, a periodontal consultation and interceptive/corrective therapy should be performed prior to commencing with orthodontic treatment. Orthodontic treatment should be postponed or replanned in order to shorten treatment duration and reduce the orthodontic forces exerted on the aggressive periodontitis involved dentition.
    Full-text · Article · Dec 2012 · Acta odontologica Scandinavica
  • Dror Aizenbud · Hagai Hazan-Molina · Shmuel Einy · Dorit Goldsher
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    ABSTRACT: Magnetic resonance imaging (MRI) is one of the most powerful tools in diagnostic imaging. With the growing rates of orthodontic treatment, there are increasing chances of post-orthodontic treatment patients permanently wearing fixed retainers who shall undergo MRI examination.Three adolescent patients were referred for craniofacial MRI examination. All the patients had completed full orthodontic treatment with a retention protocol of permanently wearing bonded gold solder-filled wire fixed retainers. In the first 2 cases, the MRI examination was performed on a 1.5-T system and in the last case on a 3-T system.All the images achieved were of good quality and high resolution. No adverse effects were reported by the first 2 patients including no complaint of heat sensation or any other discomfort in the anterior teeth area. The third patient complained of a headache during the MRI examination.Radiologists and technicians may consider allowing performance of MRI examination using 1.5-T systems when a gold solder-filled wire fixed retainer is involved with no concern regarding the patient's health or the accuracy of the MRI scans.
    No preview · Article · Nov 2012 · The Journal of craniofacial surgery
  • Hagai Hazan-Molina · Abraham Z Reznick · Hanna Kaufman · Dror Aizenbud
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    ABSTRACT: Objective: This study aimed to investigate PDL's cytokine concentration fluctuations after induction of orthodontic force with and without extracorporeal shock wave therapy in a rat model. Materials and methods: An orthodontic appliance was fabricated and applied between the molars and the incisors of rats. The rats were treated by a single episode of 1000 shock waves and gingival crevicular fluid was collected for 3 days. The expression and concentration of IL-1β and VEGF were evaluated by ELISA assay. On day 3 all rats were sacrificed and histologic and immunohistochemical assays were applied. Results: IL-1β concentration rose in both the treated and non treated shockwave groups on the first day, however it was statistically significantly higher in the treated group on day 2. No statistically significant difference was detected between the groups on day 3. The number/area of TRAP positive cells was higher in the non shockwave group than in the treated group. The percentage of cells expressing VEGF displayed the opposite trend. The findings regarding the immunohistochemical assay for IL-1β corresponded with those of the ELISA assay on day 3. Conclusion: The application of shockwaves during orthodontic tooth movement influences the expression of IL-1β and VEGF and may alternate the periodontal remodelling expected rate.
    No preview · Article · Oct 2012 · Archives of oral biology
  • D. AIZENBUD · H. HAZAN-MOLINA · M. COHEN · A. RACHMIEL
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    ABSTRACT: Objectives: Distraction osteogenesis is used to increase the vertical and transversal bone volume of the alveolar ridge and requires 3 dimensional vector controls. Temporary anchorage devices (TADs) may be inserted into the transported segment enabling distraction vector control by exerting orthodontic force. Our aim was to describe a combined orthodontic surgical technique involving vertical alveolar distraction using TADs. Methods: Four patients, who presented with extensive anterior alveolar ridge bone loss combined with the incisors and canines, underwent treatment according to a combined surgical orthodontic protocol, including presurgical orthodontic preparation and a preimplantation surgical augmentation stage involving vertical distractor insertion. During the active vertical alveolar distraction process, 3 TADs were inserted. Intraoral orthodontic elastics were attached to the main orthodontic archwire exerting multidirectional forces to control the vertical distraction vector. After 3 months of vector controlling and active bone molding, the TADs were removed. Results: Anterior alveolar ridge augmentation using distraction osteogenesis was achieved. The application of TADs for best anterior segment curvature enabled dental implant insertion, best positioning and restoration. Conclusions: A combined surgical orthodontic management protocol involving vertical alveolar distraction osteogenesis for augmentation purposes is an efficient treatment method to improve alveolar ridge volume and is the best architecture for the preimplantation stage.
    No preview · Conference Paper · Sep 2012
  • D. AIZENBUD · H. HAZAN-MOLINA · S. EINY · D. GOLDSHER
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    ABSTRACT: Objectives: MRI is one of the most powerful tools in diagnostic imaging. With the growing rates of orthodontic treatment, there are increasing chances for post-orthodontic treatment patients permanently wearing fixed retainer to undergo MRI examination. Our aim is to describe 3 cases with fixed post-treatment orthodontic retainers who underwent an MRI examination without its removal. Methods: Three adolescent patients were referred to an MRI brain study. All the patients have completed full orthodontic treatment with a retention protocol of permanently wearing bonded Ortho-FlexTech™ fixed retainers. In the first two cases the MRI study was performed on a 1.5T system and on the last case on 3T system. Results: All study's images achieved were of good quality and high resolution. No adverse effects were reported by the first two patients including complaint on heat sensation or any other discomfort in the anterior teeth area. The third patient complained on a headache during the MRI study, assumed to be an episode of tension headache. Consequently both fixed retainer were removed. Conclusions: Radiologists and technicians may consider allowing MRI examination performance on 1.5T systems where Ortho-FlexTech™ is involved with no concern regarding the patient health or the accuracy and the diagnostic value of MRI images.
    No preview · Conference Paper · Sep 2012

Publication Stats

115 Citations
37.34 Total Impact Points

Institutions

  • 2011-2015
    • Technion - Israel Institute of Technology
      • Ruth and Bruce Rappaport Faculty of Medicine
      H̱efa, Haifa, Israel
    • Hebrew University of Jerusalem
      • Department of Community Dentistry
      Jerusalem, Jerusalem District, Israel
  • 2014
    • Stanford University
      • Department of Surgery
      Palo Alto, California, United States
  • 2012-2014
    • Rambam Medical Center
      H̱efa, Haifa, Israel