Impact of monopolar radiofrequency energy on subchondral bone viability

The purpose of this study was to analyze the impact of monopolar radiofrequency energy treatment on subchondral bone viability. The femoral grooves of six chinchilla bastard rabbits were exposed bilaterally to monopolar radiofrequency energy for 2, 4 and 8 s, creating a total of 36 defects. An intravital fluorescence bone-labeling technique characterized the process of subchondral bone mineralization within the 3 months following exposure to radiofrequency energy and was analyzed by widefield epifluorescence optical sectioning microscopy using an ApoTome. After 2 s of radiofrequency energy exposure, regular fluorescence staining of the subchondral bone was evident in all samples when compared to untreated areas. The depth of osteonecrosis after 4 and 8 s of radiofrequency energy treatment averaged 126 and 942 µm at 22 days (P < .05; P < .01). The 4 s treatment group showed no osteonecrosis after 44 days whereas the depth of osteonecrosis extended from 519 µm at 44 days (P < .01), to 281 µm at 66 days (P < .01) and to 133 µm at 88 days (P < .05) after 8 s of radiofrequency energy application. Though radiofrequency energy may induce transient osteonecrosis in the superficial zone of the subchondral bone, the results of this study suggest that post-arthroscopic osteonecrosis appears to be of only modest risk given the current clinical application in humans

Open repair of Bankart lesions using suture anchors in hard workers

PubMed: 17260602The surgical techniques applied to recurrent anterior dislocation of the shoulder, especially in hard working patients, must reconstruct a stable shoulder joint with a good range of motion, which will not redislocate, so the patients can return to their hardworking duties. The aim of this study was to evaluate the results of open Bankart repairs with suture anchors, in high-demand sportsmen and hard workers with recurrent anterior shoulder dislocation. Thirty shoulders of 29 patients were included in the study. All patients were active hard workers. A modified deltopectoral incision was used and Mitek GII Suture Anchors were implanted with 7-10 mm intervals into the bone-cartilage zone of the glenoid rim. Average follow-up time was 30 months (range, 22-38). Postoperative results were analysed according to the Rowe Scoring System. We obtained good and excellent results in 93.3% of cases. The open Bankart repair using suture anchors appeared in this study as a reliable technique for hard workers or physically high-demand patients. © 2006, Acta Orthopædica Belgica

O. Cetik and M. Uslu reply [8]

[No abstract available

Contrary intermittent skin release of complete syndactyly without skin graft in adults

WOS: 000232282800005PubMed: 16186698Introduction: There are many different surgical treatment techniques of complete syndactyly. Most of them are techniques involving using skin grafts. We developed a surgical technique that does not require skin grafts, which cause problems in the distal nail border pulp and interdigital web space. Materials and Methods: Syndactyly release was performed in 12 web spaces of I I adult male patients. The average age was 21. In addition to a zig-zag incision, contrary intermittent skin release was performed. Primary coverage of the interdigital web space and nail border pulp was achieved without skin graft. Results: We obtained good results by the contrary intermittent skin release method that we developed, in adult complete syndactyly patients who had no chance for the surgical treatment due to several reasons, previously. Conclusion: With such a surgical technique, in our cases we obtained successful results, both cosmetic and functional. The presented technique is an alternative method for syndactyly release without using skin graft in adult patients

Assessing the relationship between hand dimensions and manual dexterity performance for Turkish dental students

International Conference on Physical Ergonomics and Human Factors, AHFE 2016 --27 July 2016 through 31 July 2016 -- --The objectives of this study included: (i) a determination of whether there is a difference in manual dexterity as a function of gender and dentistry curriculum and (ii) an assessment of hand anthropometric characteristics on manual dexterity test performance. In total, 155 dental students (86 males and 69 females) in their first, second, third, fourth, and fifth years of a five-year undergraduate program took part in the study that involved a simple manual dexterity test. We used a paired sample t-test to compare differences between males and females and among students of different years. Pearson’s correlation coefficients were computed as a measure of association between parameters. The results demonstrate that anthropometric data of both hands have small but significant effects on test performance, and that small hands are associated with better test performance. © Springer International Publishing Switzerland 2016

A survey of hand anthropometry and biomechanical measurements of dentistry students in Turkey

The objectives of this study were 1) to determine various hand dimensions and biomechanics measurements for Turkish dentistry students, 2) to evaluate the differences between males and females and between the right and left hand, and 3) to compare these data with similar data for other populations (Thai, Indian, Malaysian, British, Jordanian, Nigerian, Mexican, Bangladesh, and Vietnamese). The present study was undertaken to generate hand anthropometric and biomechanics data of 92 male and 73 female students studying at dentistry faculty. Sixty-seven anthropometric and 26 biomechanics measurements were taken in both hands. The means, standard deviations, and percentile values were tabulated and compared with other populations. The results suggest that the Turkish female fingers are thinner than those of other females except Indians, and that the Turkish male fingers are wider than those of the other males. Furthermore, the results also suggest that the Turkish female strength in handgripping is greater than that of other females except British females, and the Turkish male handgrip strength is greater than that of other males except Americans. This study provides insights about Turkish hand dimensions and biomechanics; it can be a basis for future studies and the design of dental tools meant for the Turkish market. © 2012 Wiley Periodicals, Inc. © 2012 Wiley Periodicals, Inc

Bilateral osteochondritis dissecans of lateral femoral condyle

WOS: 000231949500008PubMed: 16170582A 20-year-old male with bilateral osteochondritis dissecans (OD) of the distal lateral femoral condyle is presented. OD can occur in many joints; however, the medial femoral condyle of the knee is the most common. Bilateral OD of the distal lateral femoral condyle is extremely rare. In our case, the lesion on the right side was traumatic and the lesion on the left side was self-induced. We performed open surgery for both knees. The fragments were stabilized with multiple Herbert screws. This case supports the theory that a defect in the ossification center of the distal lateral femoral condyle plays a role in the etiology of osteochondritis dissecans

Contrary intermittent skin release of complete syndactyly without skin graft in adults - Response

WOS: 000237857500026

A neural network approach for assessing the relationship between grip strength and hand anthropometry

This study aimed to determine grip strength data for Turkish dentistry students and developed prediction models that allow: i) investigation of the rela- tionship between grip strength and hand anthropometry using artificial neural net- works (ANNs) and stepwise regression analysis, ii) prediction of the grip strength of Turkish dentistry students, and iii) assessment of the potential impact of hand anthropometric variables on grip strength. The study included 153 right-handed dentistry students, consisting of 81 males and 72 females. From 44 anthropometric and biomechanical measurements obtained from the right hands of the participants; five anthropometric measurements were selected for ANN and regression modeling using stepwise regression analysis. We included stepwise regression analysis results to assess the predictive power of the neural network approach, in comparison to a classical statistical approach. When the model accuracy was calculated based on the coefficient of determination (R2), the root mean squared error (RMSE) and the mean absolute error (MAE) values for each of the models, ANN showed greater pre- dictive accuracy than regression analysis, as demonstrated by experimental results. For the best performing ANN model, the testing values of the models correlated well with actual values, with a coefficient of determination (R2) of 0.858. Using the best performing ANN model, sensitivity analysis was applied to determine the effects of hand dimensions on grip strength and to rank these dimensions in order of importance. The results suggest that the three most sensitive input variables are the forearm length, the hand breadth and the finger circumference at the first joint of digit 5 and that the ANNs are promising techniques for predicting hand grip strength based on hand breadth, finger breadth, hand length, finger circumference and forearm length. © CTU FTS 2015