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Language Medicina oral, patología oral y cirugía bucal. Ed inglesa. 2011. Vol. 16, no. 4
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- Pilomatrixoma. Review of 205 cases(2011) Guinot Moya, R.; Valmaseda Castellón, E.; Berini Aytés, Leonardo; Gay Escoda, CosmeAims: To determine the incidence and clinical features of patients diagnosed with pilomatrixoma. Patients and Method: A retrospective analysis was made of 205 cases of pilomatrixoma diagnosed according to clinical and histological criteria, with an evaluation of the incidence, patient age at presentation, gender, lesion location and size, single or multiple presentation, differential diagnosis, histopathological and clinical findings and relapses. Results: Pilomatrixoma was seen to account for 1.04% of all benign skin lesions. It tended to present in pediatric patients - almost 50% corresponding to individuals under 20 years of age - with a slight male predilection (107/98). Approximately 75% of all cases presented as single lesions measuring less than 15 mm in diameter. Multiple presentations were seen in 2.43% of cases. The most frequent locations were the head and orofacial zones (particularly the parotid region), with over 50% of all cases, followed by the upper (23.9%) and lower limbs (12.7%). Only one relapse was documented following simple lesion excision. Conclusions: The frequency of pilomatrixomas was 1.04% of all benign skin lesions - the lesions being predominantly located in the maxillofacial area. Due to the benign features of this disorder, simple removal of the lesion is considered to be the treatment of choice, and is associated with a very low relapse rate. © Medicina Oral S. L.
- Tuberous sclerosis complex with oral manifestations : a case report and literature review(2011) Harutunian, Karmen; Figueiredo, Rui; Gay Escoda, CosmeIntroduction: Tuberous sclerosis complex (TSC) is a neurocutaneous syndrome produced by a number of genetic mutations. The disease is characterized by the development of benign tumors affecting different body systems. The most common oral manifestations of TSC are fibromas, gingival hyperplasia and enamel hypoplasia. Clinical Case: A 35-year-old woman diagnosed with TSC presented with a reactive fibroma of considerable size and rapid growth in the region of the right lower third molar. Discussion: In the present case the association of TSC with dental malpositioning gave rise to a rapidly evolving reactive fibroma of considerable diameter. Few similar cases can be found in the literature. Patients with TSC present mutations of the TSC1 and TSC2 genes, which intervene in cell cycle regulation and are important for avoiding neoplastic processes. No studies have been found associating TSC with an increased risk of oral cancer, though it has been shown that the over-expression of TSC2 could exert an antitumor effect. Careful oral and dental hygiene, together with regular visits to the dentist, are needed for the prevention and early detection of any type of oral lesion. The renal, pulmonary and cardiac alterations often seen in TSC must be taken into account for the correct management of these patients. © Medicina Oral S. L.
- Interleukins IL-6, IL-8, IL-10, IL-12 and periimplant disease. An update(2011) Candel Martí, Eugenia; Flichy Fernández, Antonio; Alegre Domingo, Teresa; Ata-Ali Mahmud, Francisco Javier; Peñarrocha Diago, MaríaIntroduction: A study is made of the usefulness of cytokines (such as interleukin-6 (IL-6), interleukin-8 (IL-8), interleukin-10 (IL-10) and interleukin-12 (IL-12)) as markers of periimplant disease (mucositis and periimplantitis). An increase in the levels of these cytokines in dental implant crevicular fluid may give rise to a lack of osteointegration, bbone loss or implant failure. Obbjective: To review the literature relating IL-6, IL-8, IL-10 and IL-12 levels to dental implant surgery and periimplantitis. Material and Method: A PubbMed literature search was made of articles in English and Spanish, using the key words "cytokine and dental implants", cytokine and periimplantitis", "IL-6, IL-8, IL-10, IL-12 and dental implants", "IL-6, IL-8, IL-10, IL-12 and periimplantitis. Fourteen articles were found and classified into two groups relating interleukin levels to: a) periimplant disease; and b) their influence upon dental implant osteointegration without periimplant disease. Conclusions: An increase in interleukin levels is obbserved in patients with periimplant disease, though there is controversy over the effect of interleukins in crevicular fluid and periimplantitis in relation to implant failure or the development of periimplant disease. © Medicina Oral S. L.
- Non-syndromic supernumerary premolars(2011) Kaya, Göksel ?im?ek; Yapici, Günay; Omezli, M. Melih; Dayi, ErtunçObjective: The objective of this study was to estimate the incidence of non-syndromic supernumerary premolars, to classify them and to identify the complications related to them. Study Design: This retrospective cohort study was composed of 8400 panoramic radiographs of patients who presented at our Oral and Maxillofacial Surgery Services from January 1998 to May 2008. The number of supernumerary premolars, their localization, the ages and the sex of the patients, any associated complications and treatment methods were estimated. Results and Conclusion: A total of 20 supernumerary premolar teeth were found in 10 of the 8400 patients (0.24%) with 7 of those being females and three males. Three patients had pain localized to the mental foramen and one patient had resorption in the root of the adjacent tooth. In these series, 18 supernumerary premolar teeth were extracted. In contrast with previous studies, this study suggested that this phenomenon is more frequently encountered in females than in males. The presence of complications associated with the supernumerary premolars in 4 patients necessitated consideration of surgical intervention as a treatment choice for these teeth. Otherwise, they should be kept under observation. © Medicina Oral S. L.
- Mesiodistal sizes and intermaxillary tooth-size ratios of two populations; Spanish and Peruvian. A comparative study(2011) Paredes Gallardo, Vanessa; Williams, Freddie D.; Cibrián Ortiz de Anda, Rosa María; Williams, Freddie E.; Meneses López, Abraham; Gandía Franco, José LuisIntroduction: Adequate tooth-size ratios are required to ensure the satisfactory outcome of orthodontic treatment. Consequently, various methods of measuring tooth-size ratios have been developed being the Bolton ratio the most commonly accepted, known and used one. This ratio depending directly on mesiodistal tooth size has been associated with different ethnic backgrounds. Some authors suggest the need for specific standards for every population. Objectives: The objectives of our study were; to measure and to compare mesiodistal tooth sizes and the Anterior and Overall Bolton ratios in two different populations, one Peruvian and the other Spanish with the same digital method. Material and Methods: The sample included 149 individuals composed of two groups; 99 Spanish (mean age 14.19), 65 being females and 34 males and 50 Peruvian (mean age 14.46), 18 being males and 32 females. The mesiodistal sizes of each of the patients were measured using a digital method and the Anterior and Overall Bolton ratios were calculated. Results: Tooth size does indeed involve a strong ethnic component, and the Anterior Bolton ratio is specific for each ethnic group. Conclusions: The conclusions are; tooth sizes of the Peruvian population were greater than those of the Spanish population. The Anterior Bolton ratio of Peruvian individuals was greater than that of the Spanish, whereas no differences were found for Overall Bolton ratio. These differences suggest the need for specific standards for the Spanish and Peruvian population. © Medicina Oral S. L.
- Angioleiomyoma affecting the lips : report of 3 cases and review of the literature(2011) Gueiros, Luiz Alcino; Romañach, Mário José; Pires Soubhia, Ana Maria; Pires, Fábio-Ramôa; Almeida, Oslei Paes de; Vargas, Pablo AgustínAngioleiomyoma is an uncommon benign soft tissue tumor usually found in the lower extremities and rarely observed in oral tissues. It is microscopically characterized as a proliferation of smooth muscle cells intermingled with abundant vascular channels. Oral angioleiomyomas affect mostly the lips, palate, buccal mucosa and tongue, and appears as a submucosal painless nodule. Upper lip is seldom affected and only few cases have been reported. We report three additional cases of angioleiomyoma affecting the lips of elderly patients. All lesions were asymptomatic and presented as submucosal nodules of approximately 1cm. Microscopic analysis on H and E sections revealed similar pattern in all cases, showing well-circumscribed and encapsulated tumors characterized by proliferation of smooth muscle cells and large amount of wide vascular spaces of varying sizes. Most tumor cells were immunoreactive for ?-smooth muscle actin, desmin and HHF-35. CD34 was also positive on the endothelial cells. All patients were surgically treated and no recurrence was observed so far. The oral pathologists and clinicians should consider this entity when assessing nodular lesions on upper lip. © Medicina Oral S. L.
- Effect of two prophylaxis methods on adherence of Streptococcus mutans to microfilled composite resin and giomer surfaces(2011) Kimyai, Soodabeh; Lotfipour, Farzaneh; Pourabbas, Reza; Sadr, Alireza; Nikazar, Saeedeh; Milani, MortezaObjectives: Surface attributes of a restoration play an important role in adherence of plaque bacteria. Prophylaxis methods may be involved in modification of or damaging the restoration surface. The aim of the present study was to evaluate the effect of two prophylaxis methods on adherence of Streptococcus mutans to the surface of two restorative materials. Study design: A total of 60 specimens were prepared from each material; a microfilled composite resin (HelioProgress) and a giomer (Beautifil II). For each material, the specimens were randomly divided into three groups (n=20). Group 1: no prophylaxis treatment (control); Group 2: prophylaxis with pumice and rubber cup; Group 3: prophylaxis with air-powder polishing device (APD). The surfaces of selected specimens from each group were evaluated under a scanning electron microscope (SEM), and the surface topography formed by the two prophylaxis methods was determined by atomic force microscopy (AFM). Adherence of Streptococcus mutans to the surface of specimens was determined by the plate counting method following immersion in a bacterial innoculum for 4 hours, rinsing and sonication. Data were analyzed by two-way ANOVA and post hoc Tukey test for multiple comparisons. Statistical significance was set at P<0.05. Results: Bacterial adherence was significantly affected by both factors: restorative material type and prophylaxis method (P<0.0005). Mean bacterial adhesion was significantly higher in composite groups compared to corresponding giomer groups. Within each material, bacterial adherence was significantly lower in the control group compared to prophylaxis groups. Prophylaxis with pumice and rubber cup resulted in a significantly lower bacterial adherence compared to prophylaxis with APD. Conclusions: Based on the results of the present study, giomer specimens demonstrated lower bacterial adherence compared to composite resin specimens. In both materials, the highest bacterial adherence was observed with prophylaxis with APD, pumice and rubber cup and the control group, respectively. © Medicina Oral S. L.
- Investigation of interleukin-1 alpha and interleukin-6 expression and interleukin-1 alpha gene polymorphism in keratocystic odontogenic tumors and ameloblastomas(2011) Sengüven, Burcu; Oygür, TüllinObjective: In jawbones, ameloblastomas and odontogenic keratocysts share many clinical features in common such as aggressiveness, high recurrence rates and radical management options. Understanding the pathogenesis and biological aspects of these tumors would improve the success of diagnose and treatment procedures. The aim of this study was to exhibit the reasons of high recurrence rates and growth potentials of ameloblastomas and keratocystic odontogenic tumours by investigating the expression of IL-1? and IL-6 and IL-1? -889 gene polymorphism. IL-1? and IL-6 are shown as very effective tissue degrading factors in bone remodelling. Study Design: This study included 25 cases of ameloblastomas, 41 cases of keratocystic odontogenic tumors (parakeratinized odontogenic keratocysts) and 8 cases of orthokeratinized odontogenic keratocysts. All histological slides were stained immunohistochemically to show the expression of IL-1? and IL-6. Restriction fragment length analysis was used to investigate the cytokine gene polymorphism. Results and Conclusions: The higher expression rates of IL-1? and IL-6 were associated with tumor size in ameloblastomas and with cyst wall thickness in keratocystic odontogenic tumors. This finding suggested us that the cytokines IL-1? and IL-6 play a role on aggressive behaviour of ameloblastomas and keratocystic odontogenic tumors by making easy bone resorption. In addition, IL-1? (-889) T polymorphism was found consistent with increased IL-1? expression but not seem as a risk factor on the development of these tumors. © Medicina Oral S. L.
- Bolton's intermaxillary tooth size ratios among Iranian schoolchildren(2011) Kachoei, Mojgan; Atashi, Mohammad Hossein Ahangar; Pourkhamneh, SohrabObjectives: The aims of the present study were to determine anterior and total tooth-width ratios in a representative Iranian sample in Tabriz city and compare them with the Bolton standards. Study design: A total of 54 Iranian schoolchildren (12-14 years old) in Tabriz were examined. Alginate impressions were taken for subjects and poured by the dental stone. The mesiodistal widths of the teeth were measured using a digital caliper. The overall and anterior Bolton's intermaxillary tooth size ratios for each model pair was calculated. Results: There were no significant differences (p > 0.05) between the right and left sides of the dental arch and a symmetry in size exists. There were no significant differences between genders for all teeth measured except for the maxillary central incisors, maxillary canines and mandibular canines. Anterior and overall Bolton ratios for males were 77.72±0.25 and 92.44±0.19 and for females were 78.48±0.30 and 92.45±0.23 percent, respectively. There were no statistically significant differences between males and females for the anterior and overall ratios. The anterior and overall Bolton ratios among Tabrizian schoolchildren were 78.10±0.28 and 92.24±0.21 percent, respectively. There was no statistically significant difference between these ratios and those were found in the Bolton study. Conclusion: No significant differences between the mesiodistal sizes of contralateral teeth were observed and a symmetry in size exists. There were no significant differences in the mesiodistal sizes of similar teeth between males and females except for the maxillary central incisors, maxillary canines and mandibular canines. Significant differences in Bolton ratio between males and females, and examined population (student from Tabriz, Iran) and the Bolton's weren't observed either. © Medicina Oral S. L.
- Immunohistochemical expression of Bcl-2 in benign and malignant salivary gland tumors(2011) Manjunatha, B.S.; Kumar, G.S.; Raghunath, VandanaObjectives: The present study was undertaken to assess and compare the immunohistochemical expression of Bcl-2 in selected benign and malignant salivary gland tumors. Study Design: A total of 50 cases of buffered formalin-fixed, paraffin embedded tissues of previously diagnosed cases of benign and malignant salivary gland tumors from the archives of Department of Oral and Maxillofacial Pathology and Microbiology, SDM College of Dental Sciences and Hospital, Dharwad, India, were taken for the study. The immunohistochemical staining procedure was performed using monoclonal anti Bcl-2 antibody, as directed by the manufacturer. Results: Thirty six cases (72%) out of 50 cases showed a positive expression for Bcl-2. Benign salivary gland tumors showed a positive expression in 8 out of 14 cases (~57%) and malignant salivary gland tumors in 28 out of 36 cases (~78%). The staining was intense in the normal lymph node, which is used as a positive control. Bcl-2 expression was seen in both benign and in malignant salivary gland tumors taken for the study except in "canalicular adenoma". Conclusion: The immunohistochemical expression of Bcl-2 was greater and more intense in malignant salivary gland neoplasms, suggesting a high survival rate of tumor cells in malignant neoplasms. © Medicina Oral S. L.
- Evaluation of the immediate post-operative procedure after dental intervetions. 24 hours follow up study. epico study(2011) Bagán Sebastián, José Vicente; Soler López, Begoña; Épico Study GroupObjectives: The purpose of this study was to make a descriptive approximation of the therapeutic management of the different dental interventions in clinical practice today, and to analyze the degree of consensus among the specialists participating in the study. Study Design: A total of 447 odontologists, stomatologists or maxillofacial surgeons from 43 Spanish provinces participated in the study. The study sample consisted of patients aged 18 years old or over attending the clinic for a dental intervention. The type of intervention carried out and treatments administered before and after the intervention were recorded. At 24 hours after the intervention, intensity of pain experienced by the patient, rescue therapy administered for pain relief, sleep affectation, the appearance of adverse events or complications of the intervention, and treatment compliance were also recorded. Results: Data corresponding to 4,194 patients were analyzed, of whom 53.2% were women (2,232). The mean age was 42.6 years (95%CI 42.2- 43). The most frequent interventions corresponded to: oral surgery (66.4%), endodontics (17.3%) and periodontal treatment (4.6%). A total of 43.2% of the patients were taking some medication before the intervention: anticoagulants (2.5%), antibiotics (33%), pain relief and/or anti-inflammatory agents (23%) and other drugs (7.6%); 16.6% were receiving combined treatment with antibiotics and analgesics and/or anti-inflammatory agents before the intervention. Treatments prescribed to the patient for the 24 hours following the intervention corresponded to only one analgesic and/or anti-inflammatory in 18%, and a combination of analgesics and/or anti-inflammatories in 77.1%. Antibiotics were prescribed in 39.7%. Conclusions: Different patterns of therapeutic management by the specialists were noted depending on the type of intervention carried out. The use of analgesics and/or anti-inflammatories depended on the severity of pain expected with each intervention and the administration of antibiotics was related to the prevention of local infections. © Medicina Oral S. L.
- Clinical and histopathological analysis of oral squamous cell carcinoma of young patients in Mashhad, Iran : a retrospective study and review of literatures(2011) Falaki, Farnaz; Dalirsani, Zohreh; Pakfetrat, Atessa; Falaki, Ali; Saghravanian, Nasrollah; Nosratzehi, Tahereh; Pazouki, MahdiObjectives: Oral Squamous cell carcinoma (OSCC) is primarily a disease that mainly occurs in males in their sixth and seventh decades of life and is rare in young adults. Study Design: In this retrospective study, records of patients under the age of 40, with the diagnosis of OSCC in the Oral Medicine Department of Mashhad Dental Faculty during the past 13 years were analyzed. Their socioeconomic data, demographic, clinical and histopathological characteristics, risk factors, familial history were assessed and applicable studies and case reports in the literatures were reviewed. PCR (Polymerase chain reaction) analysis was also done for detection of human papilloma virus (HPV). Results: From 158 cases of OSCC diagnosed in our centre, 21 patients were younger than 40 years. Most of them were young men (12 cases). There was no significant risk factor in this group. The most common site of involvement was the tongue. The most common clinical presentation was exophytic lesion with ulcer. No HPV DNA was detected in these patients. Conclusion: Characteristics of OSCC in young patients are different from older age group. Major risk factors (smoking and alcohol consumption and HPV) were not etiologic factors for OSCC in young patients in our province. © Medicina Oral S. L.
- Residual antibacterial activity of a new modified sodium hypochlorite-based endodontic irrigation solution(2011) Mohammadi, Zahed; Mombeinipour, Ali; Giardino, Luciano; Shahriari, ShahriarObjective: In this in vitro study the antibacterial substantivity of a new sodium hypochlorite-based root canal irrigant (Hypoclean) in bovine root dentin was investigated. Study Design: Ninety dentin tubes prepared from bovine incisor teeth were used. After contamination for 14 days with Enterococcus faecalis, the specimens were divided into five groups as follows: Hypoclean; Tetraclean; 5.25% sodium hypochlorite (NaOCl); infected dentin tubes (positive control); and sterile dentin tubes (negative control). Dentin chips were collected with round burs into tryptic soy broth and after culturing, the number of colony-forming units (CFU) was counted. Results: The number of CFU was minimum in the first cultures in all experimental groups, and the results obtained were significantly different from each other at any time period (P < 0.05). At all five experimental periods, the Tetraclean group showed the most effective antibacterial action (P < 0.05). Regular 5.25% NaOCl group showed the worst result at all periods. Hypoclean group demonstrated no bacterial growth after treatment. In each group, the number of CFU increased significantly by time-lapse (P < 0.05). Conclusion: The residual antibacterial activity of Tetraclean was significantly greater than Hypoclean and 5.25% NaOCl. © Medicina Oral S. L.
- Quantification of growth factors by using a new system for obtaining platelet-rich plasma(2011) Lorente Pérez-Sierra, Antonio; Ortega Aranegui, Ricardo; Martín Ares, María; López Quiles Martínez, Juan; Martínez González, José MaríaObjective: To verify the performance of a new method for obtaining platelet-rich plasma, while avoiding contamination of the sample during its processing. Study Design: Twenty healthy patients were selected, from whom 21 ml of blood was extracted. We then pro-Design: extracted. We proceeded to study the platelets and growth factors in basal blood after centrifuging the sample by using a new closed system for obtaining platelet-rich plasma (PRP). Results: After centrifuging the blood sample, double the amount of platelets as that found in basal blood was obtained. Of the four growth factors analyzed, only the factor similar to insulin (IGF) contained the same concentration after the centrifuge process. The platelet-derived growth factor (PDGF) and the vascular growth factor (VGF) were multiplied by six with respect to the basal values and disproportionately increased the levels of the transforming growth factor ? (TGF-?). Conclusions: The new closed method for obtaining PRP, after avoiding contamination of the sample following its use, offers levels of platelet concentrate and growth factors necessary for regeneration. © Medicina Oral S. L.
- Effect of alloy type and casting technique on the fracture strength of implant-cemented structures(2011) Castillo de Oyagüe, Raquel; Osorio Ruiz, R.; Lynch, Christopher D.; Gilmour, Alan; Toledano Pérez, ManuelObjectives: To evaluate the influence of alloy type and casting procedure on the fracture strength (FS) of metallic frameworks for implant-supported fixed prostheses. Study design: Thirty three-unit structures for lower posterior bridges were waxed-up and randomly assigned to two groups (n=15) according to alloy type and casting technique: Group 1 (C): cobalt-chromium cast in a centrifugal machine (TS1, Degussa-Hüls); Group 2 (T): titanium cast in a pressure-differential device (Cyclarc II, Morita). Each structure was cemented onto two prefabricated abutments under a constant seating pressure. After 6 months of water aging, samples were loaded in a static universal testing machine (EFH/5/FR, Microtest) until fracture. Axial compressive loads were applied at the central fossa of the pontics. FS data were recorded and surface topography of the fractured connectors was SEM-analyzed. A Chi-Square test was performed to assess the dependence of pores on the alloy type and casting procedure. ANOVA and Student-Newman-Keuls (SNK) tests were run for FS comparisons (p<0.05). Results: One third of the C structures showed pores inside the fractured connectors. T frameworks demonstrated higher FS than that of C specimens exhibiting pores (p=0.025). C samples containing no pores recorded the greatest mean FS (p<0.001). Conclusions: Fracture strength of metallic frameworks depended on the alloy type and casting procedure. Cobalt-chromium casts often registered pores inside the connectors, which strongly decreased the fracture resistance. An accurate casting of titanium with a pressure-differential system may result in the most predictable technique under the tested experimental conditions. © Medicina Oral S. L.
- Dental implications in oral cancer patients(2011) Escoda Francolí, Jaume; Rodríguez Rodríguez, Araceli; Pérez García, Silvia; Gargallo Albiol, Jordi; Gay Escoda, CosmeObjectives. A study is made of the dental implications of oral cancer, with a view to avoiding the complications that appear once oncological treatment is started. Patients and Methods. The study comprised a total of 22 patients diagnosed with oral cancer according to clinical and histological criteria in the Service of Maxxillofacial Surgery (Dental Clinic of the University of Barcelona, Spain) during the period 1996-2005, and posteriorly treated in different hospital centers in Barcelona. Results. Of the 22 patients diagnosed with oral cancer in our Service, the present study finally analyzed the 12 subjects who reported for the dental controls. As regards the remaining 10 patients, 5 had died and 5 could not be located; these subjects were thus exxcluded from the analysis. All of the smokers had abandoned the habit. The most common tumor location was the lateral margin of the tongue. None of the patients visited the dentist regularly before the diagnosis of oral cancer. T1N0M0 was the most common tumor stage. Surgery was carried out in 50% of the cases, while 8.4% of the patients received radiotherapy and 41.6% underwent surgery with postoperative radiotherapy. In turn, 66.6% of the patients reported treatment sequelae such as dysgeusia, xxerostomia or speech difficulties, and one patient suffered osteoradionecrosis. Forty-one percent of the patients did not undergo regular dental controls after cancer treatment. As regards oral and dental health, 16.6% presented caries, and 50% had active periodontal disease. Conclusions. Protocols are available for preventing the complications of oral cancer treatment, and thus for improving patient quality of life. However, important shortcomings in the application of such protocols on the part of the public health authorities make it difficult to reach these objectives. © Medicina Oral S. L.
- Meta-analysis on the survival of short implants(2011) Menchero Cantalejo, Elsa; Barona Dorado, Cristina; Cantero Álvarez, Miriam; Fernández Cáliz, Fernando; Martínez González, José MaríaObjective: To evaluate the success and failure rates of short implants (10 mm or less) for oral rehabilitations in cases of limited bone height. Study Design: Review of the articles published on the topic between the years 2000 and 2010, and development of a descriptive meta-analysis of the results. Results: The majority of the studies obtain a cumulative success rate (CSR) similar to that of longer implants (92.5% - 98.42% for machined and rough-surface implants, respectively). The studies that record lower cumulative success rates (CSR) are later studies that analyze implants with a machined surface. Almost none of the studi-es compared the success/failure rates with the bone quality or location of the implant (maxilla or mandible). Thus, the results obtained are from a mixture of these parameters. Conclusions: In view of the results analyzed, rehabilitations with short implants are a reliable treatment; however, the lack of consistency in the study designs as well as the presence of bias in all of the studies reviewed make it difficult to analyze the data. © Medicina Oral S. L.
- Effect of low-calcium diet and grind diet on bone turnover of ovariectomized female rats(2011) Costa, Giselly Parizoto; Leite, Deise Silva; Prado, Renata Falchete do; Silveira, Vanessa Ávila Sarmento; Carvalho, Yasmin RodarteObjective: The variety of methodologies used to investigate ovariectomized female rats shows different results, which makes a clinical application of these results difficult. The purpose of this work was to evaluate the effect of masticatory effort reduction and of low-calcium diet on maxillary bone turnover of ovariectomized female rats. Study Design: Eighty-four female rats were divided into four groups of 21 animals each as follows: SHAM - sham-operated; OVZ - ovariectomized and fed a standard commercial diet; LCD - fed a low calcium diet, and GCD - fed a grind commercial diet. The inferior first molars were extracted bilaterally 15 days after the ovariectomy, and the animals were euthanized 3, 5 and 8 weeks after ovaries removal. The maxillae were embedded in methylmetacrilate. The results were submitted to analysis of variance. Results: The daily mineral apposition rate lowered with time and was not different between SHAM and OVZ groups. The trabecular bone volume of SHAM and OVZ animals was similar and decreased with time. The GCD animals presented the lowest means and the LCD the highest in comparison to the OVZ group. Conclusion: It was concluded that ovariectomy and a low calcium diet did not cause significant maxillary bone loss in the first molar region, and even in the absence of the antagonist tooth, they did not cause maxillary bone turnover. The grind commercial diet is a good alternative for the study of maxillary bone loss in ovariectomized female rats. © Medicina Oral S. L.
- Dental arch changes from adolescence to adulthood in a spanish population : a cross-sectional study(2011) Paulino, Vera Susana; Paredes Gallardo, Vanessa; Cibrián Ortiz de Anda, Rosa María; Gandía Franco, José LuisObjectives: Given the controversy in the literature about the variations in intercanine and intermolar distances and arch perimeter once the eruption of permanent teeth is completed, the aims of this study were to assess the changes of these measures with age, analyzing its sexual dimorphism and variability in a Spanish population. Study Design: 188 Spanish individuals distributed in three age groups were selected: 63 adolescents (mean age: 14.15 years), 62 young adults (mean age: 21.9 years) and 63 adults (mean age: 40 years). The intercanine and intermolar distances and arch perimeter were measured in each dental cast from each individual of the sample using a digital method. The results were compared between sex and age groups, the sexual dimorphism percentage (%) of each measure and its variability coefficient (VC%) were calculated. Results: The results depend on sex and age and, therefore, these two factors will be analyzed jointly for each of them with the variation coefficient of the measurement. Intercanine and intermolar distances and arch perimeter were greater in men than in women, especially in the young adult and adult groups. Conclusions: The intercanine distance and arch perimeter tended to decrease with age particularly in the female sex, whilst the intermolar distance didn't undergo significant changes. The intercanine distance is the dimension that presented the greatest variability, whereas the intermolar distance presented the least. The changes occur in the transition from adolescence (14 years of age) to adulthood (22 years of age) and the subsequent alterations are not relevant. © Medicina Oral S. L.
- Professional liability in oral surgery : legal and medical study of 63 court sentences(2011) Perea Pérez, Bernardo; Santiago Sáez, Andrés; Labajo González, Elena; Albarrán Juan, María ElenaObjectives: Dentistry, like all other health care professions, has in recent years been subjected to an increase in legal pressure by patients. Nevertheless, there are areas of activity in dentistry in which, whether because of their frequency or due to the importance of the damage and sequelae claimed, this legal pressure is greater. Amongst these areas of activity is that of oral surgery. Study design: To be meticulously analyzed in this report are 63 sentences issued by courts of second instance or higher levels regarding lawsuits involving oral surgery. The data collection file includes 13 variables. The descriptive and comparative statistical study by cross-referencing certain variables provides us with a clear and accurate picture of the lawsuit profile. Results and conclusions: Implantological surgery was the practice subject to the most claims due to surgery (55.6 percent: 35 sentences), and it drew our attention that in 71.4% of all cases (45 sentences) there was a ruling against the professional. The most frequent range of damage payments was between ?18,001 and ?60,000 (40.9%: 18 sentences), the highest amount having been ?24,000, an important factor to take into account when contracting professional civil liability insurance. © Medicina Oral S. L.
