The aim of this study was to analyse the relative age effect (RAE) in competitive swimming. The best 50 Portuguese swimmers (12- to 18-year-olds) for the main individual swimming pool events of both genders were considered. Analysis was conducted on 7813 swimming event participants, taking account of respective swimmer birth dates and the Fédération Internationale de Natation points gained. Differences in the distribution of birth dates by quarter year were determined using the Chi-square. A one-way analysis of variance ANOVA was used to test for differences measured in points between individuals by quarterly birth year intervals. A two-way analysis of variance ANOVA was also conducted to test the interaction between gender and seasonal birth date with regard to performance. The results show an inequitable distribution (p<0.01) of birth dates by quarter for almost all age groups and both genders. However, the distribution of birth dates by quarter for each considered swim event shows that RAE seems to exist only for 12-year-old females and 12- to 15-year-old males. Analysing mean swimming performance, post-hoc results (p<0.01) show no consistency in RAE. Higher performance occurs among older swimmers only in 100 m butterfly (female 1998, 1st≠2nd quarter, p=0.003). The results also show no interaction between gender and seasonal birth date (p<0.01). Findings of this study show that a higher number of swimmers, particular males, are born in the first two quarters of the year, although there is mostly no effect of seasonal birth date on performance differences within the top 50 swimmers.

Temporomandibular joint is a highly specialized structure in craniomandibular complex. This structure can be compromised by neurological, orthopedic and musculoskeletal problems, originating temporomandibular disorders (TMD). TMD carries a particular symptomatology, which can be difficult to diagnose and treat, accompanied by lack of movement coordination and painful manifestations associated to biomechanical unbalance of the joint and its related structures. A retrospective long-term study made it possible to evaluate the results of a physiotherapeutic intervention in patients with TMD who were treated in a Public Health Service in Campinas, Brazil. Two different groups were considered: Group I (n = 27) was submitted to a complete physiotherapeutic treatment; Group II (n = 19), did not complete the proposed program. The follow up periods, ranging from 4 to 18 months after treatment, were carried out by a telephone interview, in which the patients were asked questions related to the manifested complaints at that time. The results revealed 21 patients in group I with no painful manifestations at the end of the therapy. During the follow up period, 16 patients in group 1 and 5 patients in group II were asymptomatic, but 10 patients in group I and 16 in group II had remained in treatment by other specialties, as neurology, dentistry, psychiatry and others. The observed results indicate that an interdisciplinary approach is essential in these cases and a comprehensive methodology to physical therapy could play an important role in TMD treatment.

AIM: To evaluate medical records from patients who had maxillofacial infections between August 2002 and May 2010.METHODS: Analysis of 157 patients' data looking for epidemiology, causes of the infection, type of treatment established and complications.RESULTS: 113 patients had odontogenic infections and 44 had non-odontogenic infections. The white ethnicity was the most affected (64.33%), prevailing the men (53.5%). The odontogenic infections occurred mostly at the mandible (55.74%), involving the posterior teeth (82%). Dental decay was the main etiology (90.90%). The most affected facial anatomic region was the submandibular (42.85%). Surgical treatment was required in 76% of the cases.CONCLUSIONS: Maxillofacial infections should be treated as soon as possible. Even without culture and antibiogram results, it was possible to treat the infection and to reestablish tissue function.

Abstract Objective The objective of the present study was to evaluate the clinical and radiographic results of our series regarding ulnar shortening osteotomy, as well as to briefly review the pathology, indications and surgical options of ulnocarpal conflict. Methods We performed a retrospective analysis of consecutive patients who were treated with ulnar shortening osteotomy between January 2012 and June 2017 at our hospital. We clinically evaluated pain, articular range of motion, grip strength and functional outcomes using the quick-DASH questionnaire. We radiographically measured the pre- and postoperative ulnar variance and the shortening performed. Results We identified eight operated patients, and it was possible to evaluate seven of them. Pain decreased in this population (visual analogue scale [VAS] score changed from 7 to 2.6, p< 0.05), there was a decrease in quick-DASH (64 to 28, p< 0.05) and we found a decrease in the articular amplitude ∼ 7° for flexion (p= 0.2), and of 5.5° for supination (p= 0.3), as well as decreasing grip strength to about 86% on the contralateral side (p= 0.07). The ulnar variance changed from a mean of + 5.5 mm to - 1.1 mm (p< 0.05). Two out of 8 patients (25%) presented plaque-related symptoms and one of them underwent a new intervention to extract the material. Conclusions Ulnar shortening osteotomy is an effective surgical procedure both in the treatment of ulnocarpal conflict and in the discharge of the ulna. The results presented agreement with other results published in the literature, with good clinical and radiographic results.

Abstract Objective To verify whether, regardless of the screw placement technique, there is a safe distance or angle in relation to the facets that can prevent violation of the facet joint when the screws are placed. Methods Retrospective, single, comparative, non-randomized center. We evaluated by axial computed tomography: the angle of the screw/rod in relation to the midline, the angle of the center of the facets in relation to the midline, the distance between the head of the screw/rod to the midline, and the distance from the center of the facets to the midline; the violation of the facet joint will be evaluated in a gradation of 0 to 2. Also will be measured the difference between the angle os the facets and the angle of the screws (Δ Angle) and, the difference between the facet distance and the screw distance (Δ Distance). Results A total of 212 patients and 397 facets were analyzed (196 on the left and 201 on the right). Of these, 303 were not violated (grade 0), corresponding to 76,32%, and 94 suffered some type of violation (grade 1 and 2), corresponding to 23,68%. The mean of Δ angle was 9.87° +/− 4.66° (grade 0), and of 3.77° +/− 4.93° in facets (grade 1 and 2) (p< 0.001), and the Δ mean distance in cases in which there was no violation was 0.94 arbitrary units (a.u.) +/− 0.39 a.u., while the Δ distance in G1 and G2 cases was 0.56 a.u. +/− 0.25 a.u. (p< 0.001). Conclusion The measurements of angle and distance between facet and screw can help in the placement of screws. These parameters can be used as safety measures with the most frequent use of surgical navigation techniques.

Abstract Objective The objective of the present work was to perform a retrospective study based on the medical files and radiographs of the patients, as well as on the socioeconomic data of the patients submitted to distal radio osteosynthesis with locking plates, evaluating them clinically and radiographically. Methods The postoperative period was evaluated clinically and radiologically in the orthopedics and traumatology clinic service of our hospital between 2016 and 2017. Results In the radiographic evaluation, we found 22 (75.86%) excellent results, 6 (20.69%) good results, and 1 (3.45%) regular result. In the clinical evaluation, the ulnar deviation obtained a mean of 28.40, a standard deviation (SD) of 3.0 and a coefficient of variation of 10.56%. The radial deviations averaged 22.93, with a SD of 2.2 and a coefficient of variation of 9.59%. The range of motion in flexion obtained a mean of 59.43, a SD of 9.86 and a coefficient of variation of 16.59%. The extension obtained a mean of 53.83, a SD of 5.09 and a coefficient of variation of 9.46%. Conclusion We have concluded that there is statistical correlation between clinical and radiographic data, and that the locking plate is a treatment method with a high success rate in the surgical procedure of distal radius fractures.

Abstract Objective To clinically evaluate the results of patients undergoing arthroscopic surgical treatment of anterior shoulder instability. Methods A retrospective study of 94 patients. With a minimum follow-up of 24 months, we sought to correlate the characteristics of the patients and the surgery, such as age, gender, type of injury (traumatic or atraumatic) and the patient's position during surgery (lateral decubitus and beach chair) with the results obtained, the recurrence rate, the lateral rotation loss, the residual pain, and the functional scores of Carter-Rowe, University of California at Los Angeles (UCLA), and Constant-Murley. Results We observed a recurrent dislocation rate of 11.7%, lateral rotation loss in 37.23% of the patients, and some degree of residual pain in 51.6% of them. We obtained a mean Carter Rowe score of 85.37, representing 86% of good/excellent results. In the UCLA score, we obtained 88% of good/excellent results, similar to those obtained in the Constant-Murley score (86%). Conclusion The arthroscopic treatment of the anterior instability of the shoulder presents satisfactory results and low index of important complications, being the method of choice for most patients.

Abstract This study investigated risk factors for tooth injuries in individuals from a dental clinical reference service for patients with special needs in Belo Horizonte, MG, Brazil. This is a retrospective cohort study that evaluated 493 dental charts of individuals with or without tooth injuries at their first dental appointment. The dependent variable was the time of occurrence of new dental traumatic injuries and was measured in months. Gender, age, International Code of Diseases, mother’s education, mouth breathing, hyperkinesis, pacifier use, thumb sucking, psychotropic drug use, tooth injuries at the first dental examination, involuntary movements, open bite, having one or more siblings and reports of seizures were the covariates. The Cox proportional hazards regression model was used to estimate the unadjusted and adjusted hazard ratios and their respective 95% confidence intervals. The average time that individuals remained free of dental traumatism was 170.78 months (95% CI, 157.89-183.66) with median of 216 months. The incidence of new events was 11.88%. The covariate associated with an increased risk of dental traumatism was a history of tooth injuries at the first dental appointment. The increase in dental trauma risk was 3.59 (95% CI, 1.94-6.65). A history of traumatic dental injury was the risk factor for the dental trauma found in this group of individuals with developmental disabilities.