international journal of stomatology & occlusion medicine

Publisher: Springer Verlag


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    International journal of stomatology and occlusion medicine
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Background Onplants are skeletal orthodontic anchorage devices that serve as alternatives to the frequently used miniscrews and palatal implants. Since onplants are not placed in bone, immediate loading is not possible and treatment may be prolonged. The purpose of this study was to improve the onplant surface by nanocrystalline diamond (NCD) coating and bone morphogenetic protein-2 (BMP-2) biofunctionalization to enhance osseointegration. Materials and methods Forty-eight onplants were placed on the palate and the mandible of three domestic pigs. The onplants were divided into three groups of the same size: (1) uncoated, (2) coated with NCD, (3) coated with NCD and functionalized with BMP-2. After 6 weeks, the pigs were sacrificed and the samples were subjected to radiographic, histologic, and histomorphometric analyses. Results Ten of the 48 onplants were lost. There was no significant difference between the samples in the upper and the lower jaw. The BMP-2 functionalized onplants showed higher bone-to-implant contact than the other groups albeit without significance. Conclusion The results of this pilot study show that BMP-2 biofunctionalization of NCD-coated onplants improves osseointegration and may suggest its clinical use in orthodontics. Due to the high loss rate, more investigations are required to confirm the beneficial effects and the current data should be interpreted with caution.
    international journal of stomatology & occlusion medicine 12/2014;
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    ABSTRACT: Radicular cysts are the most frequent odontogenic cystic lesions in human tooth-bearing areas but according to the English literature are rarely associated with deciduous teeth. This case report presents an additional case of a radicular cyst associated with a deciduous mandibular molar along with a bifid rib. The presentation, diagnosis, management and outcome of this radicular cyst are discussed.
    international journal of stomatology & occlusion medicine 08/2014;
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    ABSTRACT: Root canal treatment of invaginated teeth is frequently challenging because of problems associated with gaining access to the root canals and with variations of canal morphology associated with this type of malformation. This article reports on the conservative endodontic management of bilateral upper central incisors diagnosed with infected dens invaginatus (Oehlers type II) and associated irreversible pulpitis with concomitant oligodontia. The use of contemporary endodontic techniques in the diagnosis, treatment planning and management of the case are highlighted.
    international journal of stomatology & occlusion medicine 08/2014; 7(3):81-84.
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    ABSTRACT: Background Keratocystic odontogenic tumor (KCOT) is one of the most common odontogenic neoplasms. There are many kinds of treatment modalities which can be a conservative method, such as enucleation or an aggressive method, such as enucleation followed by cryosurgery and radical surgical tactics with bone resection. In the literature a relatively high recurrence rate reported for KCOT with a range of 5-70 % depending on the method of treatment. Case presentation The aim of this case report is to present the prosthetic rehabilitation of an 18-year-old male patient who had previously been operated on for a KCOT. Enucleation was preferred due to the size of the lesion. Even though a recurrence was observed 1 year postoperatively, a less extensive procedure was sufficient for the treatment. The patient was successfully rehabilitated with an implant after a follow up period of 19 months following the second operation. Conclusion Prosthetic rehabilitation of a single tooth implant after enucleation of KCOT is an optimal treatment option. No temporization was needed due to the patient preferences. After waiting for a 3 month period of healing phase, the gingiva former was fixed. After 1 week an impression was made and the crown was cemented. The restoration was clinically successful in the 3 month, 6 month and 1 year of follow-up.
    international journal of stomatology & occlusion medicine 12/2013;
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    ABSTRACT: Background The mechanism of action of occlusal splints used for the successful treatment of temporomandibular disorders (TMD) remains unclear and controversial. Aim The aim of this study was to observe the mandibular response during sleep bruxism (SB) on the elimination of occlusal influences by using a flat anterior and lateral guidance splint (FGS). Material and method Any changes in mandibular movement patterns and condylar position with the introduction of this tool were measured. Current SB activity on the natural dentition was evaluated using a Brux Checker® (BC) and compared with the activity after insertion of an FGS in 153 subjects. Result The spatial mandibular position changed individually with a tendency toward forward and downward movement. The insertion of an FGS led to a change in the topographical condyle-fossa relationship and seemed to create an “unloading” condition for the temporomandibular joint. It was found that increased angulation of the maxillar incisors was responsible for altered muscular activity during sleep. Conclusion The masticatory organ appears to self-regulate and to provide an oral behavior modification, which may be more physiological using the FGS as a compensating factor. In this context, it is assumed that sleep bruxism in terms of parafunctional activity is a physiological function of the masticatory organ. The results of this study indicate the importance of controlling anterior guidance in the functional reconstruction of human occlusion.
    international journal of stomatology & occlusion medicine 12/2013; 6(4).
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    ABSTRACT: This review summarizes the articles published by Georg Watzek and coworkers between 2008 and 2012. Georg Watzek has always been not only an inspiring mentor but also a visioner in his field. He has (co)authored more than 200 scientific papers in renowned international scientific journals and edited 9 books. Prof. Georg Watzek and his 150 coworkers have been cited over 2,500 times, clearly reflecting the high scientific impact of the publications. More than 80 % of the work constitutes original articles with thematic issues concentrating mainly on implant osseointegration and bone regeneration. This review provides a short summary of the projects that forms the basis of ongoing research.
    international journal of stomatology & occlusion medicine 11/2013;
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    ABSTRACT: Objective The aim of this study was to evaluate the effect of tube drain in relation to pain, swelling and trismus variables following the surgical removal of bilateral impacted mandibular third molars. Materials and methods In this study 40 patients (20 males and 20 females) with bilateral impacted mandibular third molars with the same degree of difficulty (ascertained by the WHARFE index) were divided into experimental (with tube drain) and control groups (no drain). Surgical procedures were planned with a minimum interval of 15 days between the two surgical procedures. One suture procedure was accomplished using a drain and other was closed primarily using 3-0 silk sutures. The second surgery was carried out only after complete resolution of pain, swelling and trismus associated with the first surgical procedure (approximately 15 days). Results Although minor differences in pain were noted between the two groups on postoperative days 3 and 7, the differences were not statistically significant. According to this analysis, in the control group (without tube drain), facial swelling was higher on postoperative days 3 and 7 as compared to the experimental group (with tube drain). In addition the swelling in both groups disappeared completely in 15 days. All patients returned to the presurgical status on the 15th day after surgery. The interincisal opening using a tube drain was less on postoperative day 1 and more on postoperative days 3 and 7 as compared to without using a tube drain and was reduced to normal on postoperative day 15. However, statistically there were no significant differences between both groups. Conclusion The results of this study suggested that there is no difference in pain and IIO in the control and experimental groups; however, swelling (facial edema) was significantly reduced on postoperative days 3 and 7 in the tube drain group.
    international journal of stomatology & occlusion medicine 10/2013;
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    ABSTRACT: Background: Buccal recession is a main complication of median lower lip piercing. This article reports on the treatment of a clinical case with two areas of buccal recession in the first mandibular incisors 4 years after removal of the piercing. Methods: A 28-year-old female patient was referred for evaluation and treatment and presented with two areas of buccal recession of 3 mm in size in teeth numbers 31 and 41. Following oral hygiene instructions and supragingival debridement the plaque index was 20 % and the gingival index was 4 %. A subepithelial connective tissue graft in combination with enamel matrix derivatives (EMD) was carried out using the tunnel technique to provide root coverage. Results: The tissue color was nearly homogeneous with some reddish regions where the connective tissue was left uncovered ten days after the surgical procedure and there were no signs of incisions or suture marks. After 3 months there was complete root coverage, gain of keratinized tissue and gain in tissue thickness. Conclusions: The tunnel technique in combination with a subepithelial connective tissue graft and EMD was used successfully for the treatment of buccal recession after removal of the median lower lip piercing.
    international journal of stomatology & occlusion medicine 03/2013;
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    ABSTRACT: Background Root resorption is the most common side effect of orthodontic treatment and usually occurs within the first 6 months of treatment. Circumferential apical root resorption represents full resorption of the apical hard tissue components and evident root shortening. Although rarely serious it is a devastating event when recognized radiographically. The purpose of this article is to provide the dental practitioner with the results of studies on the extent of apical root resorption detected with clinical radiographs in patients treated with fixed appliances during or after orthodontic treatment and to provide the answers to the following questions: which teeth are most affected by apical root resorption, what happens to the resorbed tooth and what does the prognosis look like? The results could provide the best available evidence for clinical decisions to minimize the risk and severity of apical root resorption. Matherial and methods Study selection criteria included retrospective studies on human subjects for orthodontics with fixed appliances and apical root resorption recorded on X-rays (e.g. periapical films, panoramic films and lateral cephalometric studies) during or after orthodontic treatment. In the current literature the large variation in the methodological approaches and reporting results of data did not permit quantitative statistical comparisons and meta-analyses so that a systematic review was performed. Results Evidence suggests that orthodontic treatment causes increased incidence and severity of apical root resorption. Apical root resorption occurs mainly in anterior teeth and affects maxillary teeth more severely than mandibular teeth: primarily affected are lateral incisors followed by central incisors, canines, then mandibular canines, central incisors and lateral incisors. Mean values ranged from 0.5 to 3 mm or 3–15 % of root shortening during orthodontic treatment. The average size of molar and premolar resorption was less than 1 mm. There were no reports of tooth loss due to apical root resorption in the literature. Regarding vitality and color, root resorbed teeth remain unchanged. Conclusions Follow-up of patients with severe orthodontically induced root resorption requires radiographic monitoring at 3- to 6-month intervals during treatment. In patients with enhanced risk of resorption a 3-month radiographic follow-up is recommended. Special attention should be paid to anterior teeth considering that these are the most affected by apical root resorption. It is recommended that the best practice is the use of light force especially for intrusive moments and root torque.The current clinical recommendations are to be very careful when moving anterior teeth over a long distance and a long time, especially if the teeth have abnormal root morphology. Prevention and early diagnosis of root resorption require future research on genetic and molecular biological mechanisms. Considerable variation and unpredictability of resorption pertain to orthodontic information, patient education before consent is granted.
    international journal of stomatology & occlusion medicine 12/2012; 5(4).
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    ABSTRACT: Aim The aim of this study was to evaluate the effect of three different surface treatments on the flexural strength (FS) and shear bond strength (SBS) of repaired microhybrid composite. Materials and methods For the FS test composite specimens (n = 36: 2 mm ´ 2 mm ´ 12.5 mm) used for repair were shaped in a silicone mould. For the SBS test composite specimens (n = 36: diameter = 8 mm, thickness = 3 mm) used for repair were shaped in a metal mould, cured in visible light, and embedded in dental stone. Three different methods of surface preparation were evaluated: group A (control) specimens were treated by etching with 35 % phosphoric acid, group B specimens were air abraded with 50 μm aluminium oxide at 100 psi and group C specimens received two parallel 1 mm deep grooves using a 1/4 round burr before being treated by etching with 35 % phosphoric acid. After surface treatment a bonding agent was placed on each specimen and light-cured. Repairs were accomplished by adding more composite to the FS or SBS specimens. Specimens were thermocycled 500 times between 5 °C and 55 °C with 30 s dwell times. All specimens were tested by loading to failure at a rate of 0.5 mm/min using an Instron universal testing machine. Statistical analysis was done using ANOVA test to compare the means of each group within the SBS or FS tests and Tukey post hoc tests (p < 0.05) were used to detect any differences. Results Mean FS values (MPa) were: group A = 60.5 ± 9.9, group B = 73.9 ± 13.2 and group C = 81.3± 14.3. Mean SBS values (MPa) were: group A = 24.5 ± 4.4, group B = 28.5 ± 4.3 and group C = 27.0 ± 2.8. The FSs of groups B and C were significantly greater than in group A but there was no significant difference between group C and group B. For the SBS test group B was significantly greater than in group A but with no significant differences between groups C and B. Conclusions Acid etching alone was not very effective in producing well-bonded composite repairs. Mechanical retention was more effective than acid etching and as effective as or more effective than air-abrasion (p < 0.05) for repaired composite specimens. Clinical significance Either mechanical retention or air abrasion is recommended prior to repairing an existing composite restoration to achieve the highest bond strength.
    international journal of stomatology & occlusion medicine 12/2012; 5(4).
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    ABSTRACT: This article describes the complex dental treatment of an adult patient with missing upper posterior teeth, malocclusion with a severe curve of Spee and generalized moderate chronic periodontitis. A skeletal Class II due to a retruded mandible with high overjet and overbite and labial inclination of the maxillary incisors were also present. Based on the loss of supporting periodontal tissue, missing upper posterior teeth and extrusion of the antagonist teeth, with consequent loss of space for rehabilitation, the orthodontic treatment consisted of a miniscrew anchorage on the posterior maxilla. A multiloop edgewise arch wire was applied in the lower arch in order to correct the severity of the curve of Spee, intruding posterior teeth and incisors. When the occlusal plane was established and a normal interocclusal space was obtained at the posterior teeth a prosthodontic treatment with implants was done to replace the missing teeth. In spite of the high skeletal Class II at the end of the treatment, the overall treatment improved periodontal attachments and a Class I dental relationship was achieved with a slight mandibular anterior repositioning. Furthermore, improved aesthetics of the patient was obtained by upper incisor retraction without increasing vertical dimensions.
    international journal of stomatology & occlusion medicine 10/2012; 5(4):188–197.
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    ABSTRACT: Introduction The position and inclination of the long axis of teeth in the human dentition can be described by a set of rules. The purpose of this study was to analyze the architecture of the mandibular dentition of adult Caucasians using virtual three-dimensional (3D) reconstruction of skulls and mandibles. Method In this study 40 skulls from the Weissbach collection at the Vienna Natural History Museum were scanned using cone beam computed tomography. Several angular and linear measurements obtained from the reconstructed images were analyzed. Results The inclination of second premolars and first molars was nearest to vertical and mesial inclination became progressively greater for molars. The angular relationship between the tooth long axis and the closing axis of lower incisors ranged from 95 to 98°, while the tooth axis of buccal teeth with the contralateral condyle sequentially increased from canines to third molars. The architecture of occlusion showed that the Bonwill triangle was equilateral with a length of approximately 100 mm (about 4 inches) on one side, the Balkwill angle was approximately 25° and there was a distance of approximately 38 mm between the condyle and occlusal plane (DPO). The angle of the condylar axis inclined to correlate to the 3D structure of the mandible. Conclusions This study defines the 3D architecture of occlusion including tooth axis, condyle and shape of the mandible. The results make it possible to consider new aspects of the biomechanics of 3D reconstruction of occlusion.
    international journal of stomatology & occlusion medicine 09/2012; 5(3).