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Acta Odontol Scand [journal]
- Dental care access among individuals with Down syndrome: a Malaysian scenario. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 16.:1-6.
Abstract Objective. The purpose of this cross-sectional study was to assess the legal representatives' perceptions on dental care access of individuals with Down syndrome (DS) compared to their non-DS siblings in Peninsular Malaysia. Methods: This cross-sectional study was conducted throughout community-based rehabilitation centers (CBRC) and the Down Syndrome Organization. Legal representatives of individuals with DS within the criteria were given a structured and validated questionaire. Result. This study demonstrated that individuals with DS (76.9%) significantly utilized more health services than non-DS siblings (23.1%). The service most regularly used was speech therapy followed by opthalmology and dental services. Twenty-five per cent of respondents reported difficulty in finding dental care services for their DS child and 46.9% admitted that healthcare for their DS child took more time. The majority of DS individuals received less complex dental treatment and none received any orthodontic treatment, despite their severe occlusal problems. Conclusion. A high proportion of parents appear to be able to access dental and medical care for their DS child. However, some parents perceived difficulty in finding oral healthcare.
- Clinical and radiographic evaluation of the efficacy of platelet-rich plasma combined with hydroxyapatite bone graft substitutes in the treatment of intra-bony defects in maxillofacial region. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 9.:1-6.
Abstract Objective. The aim of this study is to evaluate the efficacy of platelet-rich plasma (PRP) clinically and radiographically when combined with bovine derived hydroxyapatite (HA) bone grafting materials and resorbable collagen membranes for the treatment of intra-bony defects frequently seen at the distal aspect of mandibular second molars following the surgical extraction of fully impacted mandibular wisdom teeth. Study design. Eighteen patients were scheduled for post-operative visits at 1, 3 and 6 months post-operatively, probing depths were measured and digital panoramic radiographs were taken. Results. There were no significant differences on probing depths among two groups. Radiographic assessment also showed no significant difference among groups at 1st and 6th month intervals, while 3 months post-operatively the amount of radiographic density at the PRP side was significantly higher. Conclusion. Combined use of PRP and bovine-derived HA graft materials for the treatment of intra-bony defects might be an appropriate approach when the main goal is providing earlier bone regeneration.
- Antibacterial activity of various root canal sealers and root-end filling materials in dentin blocks infected ex vivo with Enterococcus faecalis. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 9.:1-7.
Abstract Objective. The aim was to investigate the antibacterial activity of the root-end filling materials MTA and IRM, different endodontic sealers and calcium hydroxide [Ca(OH)2] in experimentally infected dentinal tubules. Materials and methods. Ninety-four human root segments were prepared and the root canals were enlarged to ISO size 90. After smear removal, the specimens were infected with Enterococcus faecalis for 3 weeks. The roots were divided into eight groups and filled either with MTA, IRM, Ca(OH)2, gutta-percha and EndoRez (ER)/GuttaFlow (GF)/AH Plus (AH+) or with Resilon and Epiphany (EpRe). One group of specimens was left unfilled for control. Half of the specimens were treated for 1 day and the other half for 7 days in humid conditions at 37°C. Dentin samples from each canal were collected by enlarging the canals to ISO size 150; thus a dentinal depth of 300 µm was sampled. The number of cultivable bacteria was determined for each specimen. Statistical significance was set to 5%. Results. After 1-day or 7-days of treatment, compared to control, all materials (except ER and GF at day 7) significantly reduced the number of bacteria. At day 1 and day 7, no significant difference was found between ER and GF and between Ca(OH)2, AH+, EpRe, IRM and MTA. However, a significant difference was found between these two groups of materials (except between GF and EpRe at day 7). Significantly more bacteria were cultured in the ER, GF, EpRe and IRM groups at day 7 compared to day 1. Conclusions. All materials exerted varying degrees of antibacterial activity which generally tended to decrease with time. The most stable antibacterial effect throughout the 7-day period was for Ca(OH)2, AH+ and MTA.
- Characterization of hydroxyapatite containing a titania layer formed by anodization coupled with blasting. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 9.:1-10.
Abstract Objectives. The modification of dental implant surface by increasing the surface roughness or/and altering chemical composition have been attempted. Among them, hydroxyapatite (HA) coatings are typically bioactive. On the other hand, titania coatings have good corrosion resistance and biocompatibility. Therefore, the objective of this study was to fabricate HA containing a titania layer using an HA blasting and anodization method to benefit from the advantages of both, followed by surface characterization and biocompatibility. Materials and methods. HA blasting was performed followed by microarc oxidation (MAO) using various applied voltages (100, 150, 200, 250 V). For surface characterization, the microstructure of the surface, surface phase and surface roughness were observed. Bonding strength was measured using a universal testing machine and potentiodynamic corrosion testing was performed. Biocompatibility was evaluated based on bioactivity and cell proliferation test. Results. The porous titanium oxide-containing HA was formed at 150 and 200 V. These surfaces were a lower corrosion current compared to the titanium treated only with HA blasting. In addition, composite treated titanium showed a rougher surface and tighter bonding strength compared to the titanium treated only with MAO. Biocompatibility demonstrated that HA/Titania composite layer on titanium showed a rapid HA precipitation and also enhanced cell proliferation. Conclusions. These results suggested that HA containing titania layer on titanium had not only excellent physicochemical, mechanical and electrochemical properties, but also improved bioactivity and biological properties that could be applied as material for a dental implant system.
- Maturation of teeth adjacent to dental agenesis site. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 9.:1-7.
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.
- Background factors of molar-incisor hypomineralization in a group of Finnish children. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 9.:1-7.
Abstract Objective. Molar-Incisor Hypomineralization (MIH) is a common developmental enamel defect characterized by demarcated opacities in permanent molars and incisors. Its etiology still remains unclear. The aim of this retrospective cohort study was to assess if the socioeconomic environment of the child is associated with MIH. Materials and methods. The study was located in two rural towns and three urban cities in Finland. A total of 818 children, between 7-13 years old, were examined for MIH using the evaluation criteria in line with those of the European Academy of Paediatric Dentistry, but excluding opacities smaller than 2 mm in diameter. The mothers filled in a questionnaire which included questions related to the family's way of living (e.g. area of residency, farming, day care attendance) and socioeconomic status (family income, number of mother's school years, level of maternal education). Results. The prevalence of MIH in the study population was 17.1%. Family income, urban residency and day care attendance were associated with MIH in the univariate analysis. In the multivariate analysis using binary logistic regression, only urban residency during a child's first 2 years of life remained associated with MIH. The prevalence of MIH in urban areas was 21.3% and in rural areas 11.5% (OR = 2.18, CI = 1.35-3.53, p = 0.001). Conclusions. The prevalence of MIH was related to urban residency and could not be explained by any other factor included in the study.
- Evaluation of cannibalistic cells: a novel entity in prediction of aggressive nature of oral squamous cell carcinoma. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jul 9.:1-6.
Abstract Objective. Cellular cannibalism is a distinctive morphologic feature exclusively seen in aggressive malignancies and is defined as a large cell enclosing a slightly smaller one within its cytoplasm. This phenomenon has been illustrated in several malignancies and is correlated well with the degree of anaplasia, invasive and metastatic potential of tumor cells. However, this marker has not been extensively studied and is often unnoticed during the routine histopathological assessment of Oral squamous cell carcinoma (OSCC). Thus, the aim of this research was to evaluate the presence of cannibalistic cells (CC) and to find if there exists any association with the aggressive nature of OSCC. Materials and methods: In total, 20 neck dissection cases of OSCC with follow-up data were included in the study. The cannibalistic cells were evaluated in the lesion tissues. Cellularity of cannibalism is graded asGrade I: < 5 cells, Grade II: 6-15 cells and Grade III:> 16 cells. The data was analyzed using Fischer Exact test. Results. Out of 20 cases, all the cases showed presence of CC, Grade I in five cases, Grade II in eight cases and Grade III in seven cases. A statistically significant relation between advanced grade of cellular cannibalism and lymph node positive status (p≤ 0.001) was obtained. Conclusion. Interestingly the cases with positive lymph node metastasis demonstrated Grade 3 CC.Hence, during routine histopathological examination, the search of CC can be considered as one of the important parameters to note the aggressive nature of OSCC.
- Lip buccal mucosa traumatic overgrowth due to sucking habit -A 10-year follow-up of a non-surgical approach: A combination of behavioural and myofunctional therapy. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jun 16.:1-5.
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.
- Is it safe to use a toothbrush? [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jun 16.:1-9.
Abstract Aim. To systemically collect and summarize the literature on case reports concerning adverse events associated with the oral use of a toothbrush. Materials and methods. Two electronic databases were searched for articles published up to October 2013 to identify appropriate studies using focused search terms and 'case reports' as a filter. Results. A comprehensive search identified 419 unique titles and abstracts. Ninety-four studies met the eligibility criteria. In total, 118 subjects (age range = 1-60 years) presented adverse events related to the oral use of a toothbrush. Events could be summarized in five categories, of which ingestion was the most reported problem among the individuals (50 cases). This was followed by impaction of a toothbrush (27 cases). Reports more frequently involved females and children were more likely to have injuries compared to males and adults. Most of the cases that presented with adverse events of the oral use of a toothbrush were referred for treatment to a physician. Conclusions. The combined evidence related to serious adverse events as presented in case reports showed that the oral use of a toothbrush can be associated with ingestion, impaction, instant trauma, gingival traumatic injury and seizures. Given the incidence of reporting, important recommendations are that a toothbrush should not be used to induce vomiting, nor should people walk or run with this device in their mouths, especially children.
- Periapical status of root-filled teeth in Norwegian children and adolescents. [JOURNAL ARTICLE]
- Acta Odontol Scand 2014 Jun 16.:1-5.
Abstract Objective. To study the periapical status of root-filled permanent teeth of 9-17-year-olds in Møre & Romsdal county, Norway. Materials and methods. All permanent teeth with endodontic treatment in patients born in 1994-2001 were identified in the dental records of the Public Dental Service. The data collected consisted of chart entries and radiographs. Of 1182 teeth, 174 teeth in 155 patients met further inclusion criteria, i.e. completed endodontic treatment and a follow-up with a readable radiograph of at least 1 year. Periapical status was assessed with the Periapical Index (PAI) and the technical quality of the root fillings was also quantified on a 4-grade visual scale. Results. Apical periodontitis was found on follow-up radiographs in 25% of all teeth and in 48% of the teeth with pre-operative apical periodontitis. Forty-two per cent of root fillings were of adequate technical quality. Adequate technical quality of the root filling was significantly correlated with radiographic success. Conclusions. About one fourth of all root-filled teeth and almost half of the teeth with pre-operative apical periodontitis showed clear signs of the disease at recall.