PURPOSE: The present study aimed to treat fractures of the distal end of the radius in children with Robert Jones (RJ) bandage. The objective was to compare this treatment modality with the cast regarding the frequency of the complication occurrence, child comfortability, and family satisfaction. METHODS: The study was a randomized controlled non-inferiority clinical trial including children with recent (less than 5 days) fractures at the distal end of the radius OTA/AO 23-A2, which is usually treated conservatively. Those with open fractures, pathological fracture, severely displaced fracture that needs reduction or multiple injuries were excluded. The participants were divided randomly into 2 groups according to the treatment modalities. Group 1 was treated by plaster of Paris cast (the control group), and Group 2 by modified RJ bandage (the trial group). The difference between the 2 groups was found by the Chi-squared test. The difference was considered statistically significant when the p value was less than 0.05. RESULTS: There were 150 children (aged 2 - 12 years, any gender) included in the study, 75 in each group. The complications occured in 5 (3.3%) cases only, pressure sores of 3 cases in Group 1 and fracture displacement of 2 cases in Group 2. There was no statistically significant difference in the rate of complication occurrence between both modalities of treatment (p = 0.649). Children treated by RJ bandages were more comfortable than those treated by the cast (97.3% vs. 73.3%, p < 0.001) with a statistically significant difference between them. Contrary to that, the families were more satisfied with the cast than RJ bandage (88.0% vs. 81.3%), but without a statistically significant difference (p = 0.257). CONCLUSION RJ bandage is a non-inferior alternative to the cast for the treatment of fractures at the distal end of the radius that can be treated conservatively in children.
Humans ; Child ; Radius Fractures/therapy* ; Wrist Fractures ; Fracture Fixation ; Bandages ; Upper Extremity ; Casts, Surgical

PURPOSE: Secondary displacement represents a frequent complication of conservative treatment of fractures, particularly of the distal radius. The gap space between skin and cast may lead to a certain degree movements and this increased mobility might favor redisplacement. The aim of this study was to develop a new 3D method, to measure the gap space in all 3 geometrical planes, and to validate this new technique in a clinical setting of distal radius fractures. METHODS: This study applies 3D imaging to measure the space between plaster and skin as a potential factor of secondary displacement and therefore the failure of conservative treatment. We developed and validated a new methodology to analyze and compare different forearm casts made of plaster of Paris and fiberglass. An unpaired t-test was performed to document differences between the investigated parameters between plaster of Paris and fiberglass casts. The significance level was set at p < 0.05. RESULTS: In a series of 15 cases, we found the width of the gap space to average 4 mm, being slightly inferior on the radial side. Comparing the two different casting materials, plaster of Paris and fiberglass, we found a significantly larger variance of space under casts made of the first material (p=0.39). A roughness analysis showed also a markedly significantly higher irregularity of the undersurface of plaster of Paris as compared with fiberglass. CONCLUSION This study allows for a better understanding of the nature of the "gap space" between cast and skin and will contribute to develop and improve new immobilization techniques and materials.
Casts, Surgical ; Forearm ; Humans ; Radius ; Radius Fractures/therapy* ; Wrist Joint

Maintaining projection of the reconstructed nipple is important for achieving natural and aesthetically appealing outcomes in breast reconstruction. Although various methods of avoiding mechanical force on the reconstructed nipple have been developed, the existing methods are inconvenient, crude, non-reusable, and difficult to clean or adjust. In the present study, a simple method of creating a nipple splint using a thermoplastic material is described. This splint can be easily manipulated, washed, and reused, and it is comfortable to wear for long-term use without any complications and convenient for the patient to apply.
Casts, Surgical ; Female ; Humans ; Mammaplasty ; Methods ; Nipples ; Splints

The objective of this case report is to introduce a simple technique for simultaneously taking a closed-mouth impression and functionally generated path (FGP) for a full coverage crown restoration. A monolithic zirconia crown was the restoration of choice. An alginate impression of the abutment tooth was taken to fabricate a custom-made closed-mouth impression tray covering the abutment tooth and the adjacent teeth. The tray had an FGP table and an abutment tray in cameo and intaglio surfaces, respectively. The impression was taken with silicone impression material after adjusting the abutment tray and inscribing the FGP using self-curing acrylic resins. Plaster casts were made from the impression, and a zirconia crown was fabricated. The crown was cemented to the abutment tooth with minimal adjustments. This simple technique resulted in a well-fitting crown that accounted for mandibular movements. Using the custom closed-mouth impression tray incorporating an FGP table simultaneously aids in fabricating an accurately fitting restoration that incorporates harmonious mandibular movements using a single impression capture.
Acrylic Resins ; Casts, Surgical ; Crowns ; Dental Impression Technique ; Dental Occlusion ; Jaw Relation Record ; Silicon ; Silicones ; Tooth

PURPOSE: The aim of this clinical study was to assess the accuracy of the implants placed using a universal digital surgical guide. MATERIALS AND METHODS: Among 17 patients, 28 posterior implants were included in this study. The digital image of the soft tissue acquired from cast scan and hard tissue from CBCT have been superimposed and planned the location, length, diameter of the implant fixture. Then digital surgical guides were created using 3D printer. Each of angle deviations, coronal, apical, depth deviations of planned and actually placed implants were calculated using CBCT scans and casts. To compare implant positioning errors by CBCT scans and plaster casts, data were analyzed with independent samples t-test. RESULTS: The results of the implant positioning errors calculated by CBCT and casts were as follows. The means for CBCT analyses were: angle deviation: 4.74 ± 2.06°, coronal deviation: 1.37 ± 0.80 mm, and apical deviation: 1.77 ± 0.86 mm. The means for cast analyses were: angle deviation: 2.43 ± 1.13°, coronal deviation: 0.82 ± 0.44 mm, apical deviation: 1.19 ± 0.46 mm, and depth deviation: 0.03 ± 0.65 mm. There were statistically significant differences between the deviations of CBCT scans and cast. CONCLUSION: The model analysis showed lower deviation value comparing the CBCT analysis. The angle and length deviation value of the universal digital guide stent were accepted clinically.
Casts, Surgical ; Clinical Study ; Humans ; Printing, Three-Dimensional ; Radiotherapy Planning, Computer-Assisted ; Stents ; Surgery, Computer-Assisted

PURPOSE: The purpose of this study was to determine the effect of changes in the horizontal plane angle on the mesiodistal width ratios of the maxillary anterior teeth during the acquisition of frontal view photographs, derive these ratios for Korean adults on the basis of the data obtained, and analyze them using the Golden Proportion as a reference. MATERIALS AND METHODS: In experiment I, 30 plaster casts were mounted on an articulator and positioned on the angle-measuring device with a center setting of 0°. The device was rotated to 10° in 1° increments in a counterclockwise direction. At each angle, photographs were obtained and analyzed. Experiment II was based on 60 patients who visited the Department of Prosthodontics at Kyungpook National University Dental Hospital from February 2012 to February 2015. The patients were divided into three groups [Male (M), Female (F), Total (M + F)]. Frontal views were obtained for all groups and analyzed. RESULTS: From 1° to 10°, the relative mesiodistal width ratios for the maxillary anterior teeth showed no significant differences from those at 0°. In all three groups, the relative width ratio of the maxillary central incisor was smaller than that specified in the Golden Proportion; the opposite was true for the canine. CONCLUSION: Our results suggest that the mesiodistal width ratios of the maxillary anterior teeth do not follow the Golden Proportion in Korean adults, and that a change in the horizontal plane angle from 1° to 10° during frontal photography does not affect these ratios.
Adult* ; Casts, Surgical ; Dental Articulators ; Female ; Gyeongsangbuk-do ; Humans ; Incisor ; Photography ; Prosthodontics ; Tooth

OBJECTIVE: To assess the accuracy of anterior tooth movement using clear aligners in integrated three-dimensional digital models. METHODS: Cone-beam computed tomography was performed before and after treatment with clear aligners in 32 patients. Plaster casts were laser-scanned for virtual setup and aligner fabrication. Differences in predicted and achieved root and crown positions of anterior teeth were compared on superimposed maxillofacial digital images and virtual models and analyzed by Student's t-test. RESULTS: The mean discrepancies in maxillary and mandibular crown positions were 0.376 +/- 0.041 mm and 0.398 +/- 0.037 mm, respectively. Maxillary and mandibular root positions differed by 2.062 +/- 0.128 mm and 1.941 +/- 0.154 mm, respectively. CONCLUSIONS: Crowns but not roots of anterior teeth can be moved to designated positions using clear aligners, because these appliances cause tooth movement by tilting motion.
Casts, Surgical ; Cone-Beam Computed Tomography ; Crowns ; Humans ; Tooth Movement* ; Tooth*

OBJECTIVETo explore the effective method of preventing cubitus varus deformity in nonoperative treatment of humeral supracondylar fracture in children.

METHODSFrom May 1992 to December 2013,319 patients with hemeral supracondylar fracture in children were treated with manual reduction and external plaster fixation in extension position. There were 253 males and 66 females, aged from 15 months to 13 years old with an average of 6.7 years. Among the patients with humeral supracondylar fracture, extension type was in 284 cases and inflexion type was in 35 cases; 167 cases on the left and 152 cases on the right. Injury to treatment time was 1 hour to 7 days with a mean of 1.8 days. No included nerve injury and operative case in the patients.

RESULTSAll patients were followed up from 3 months to 14 years with an average of 37.3 months. All fractures obtained bone healing and healed time was 6 to 8 weeks with an average of 6.9 weeks. No complications of serious cubitus varus deformity,vascular nerve injury or volkmann contracture were found. In 183 cases, the carrying angle was consistent with itself contralateral,ranged from 5° to 15°; in 105 cases, the carrying angle of uninjuryed side was decreased. During the reset, the carrying angle of 26 patients with ulnar deviation angle was for -5° to 0°; and 5 patients with radial deviation angle was for 15° to 18°, basically does not affect the appearance. The activities of all elbow joint were normal.

CONCLUSIONExternal plaster fixation in extension position has some value to preventing cubitus varus deformity in nonoperative treatment of humeral supracondylar fracture in children and hope that more scholars to do further study.

Adolescent ; Casts, Surgical ; Child ; Child, Preschool ; Female ; Fracture Fixation ; methods ; Humans ; Humeral Fractures ; surgery ; Infant ; Male

OBJECTIVETo compare therapeutic effects between arthroscopic medial retinaculum plication and plaster external fixation for the treatment of acute patellar dislocation.

METHODSFrom February 2006 to October 2012,29 patients with acute patellar dislocation were divided into two groups: operation group and non-operation group. The patellar dislocation duration was 2 weeks. In operation group, there were 7 males and 10 females, with an average age of (16.2 ± 6.2) years old, and the patients were treated with arthroscopic medial retinaculum plication. In non-operation group, there were 5 males and 7 females,with an average age of (16.3 ± 5.0) years old,and the patients were treated with plaster external fixation. The Kujala scores, patellar tilt angle measured on CT film, apprehension test and recurrence rate of patellar instability were observed before and 1 year after treatment.

RESULTSIn operation group, the pre-treatment and post-treatment patellar tilt angles had no statistical difference, but the post-treatment Kujala score was lower than that of pre-treatment; while in non-operation group, the post-treatment patellar tilt angle was larger than that of pre-treatment, and the post-treatment Kujala score was lower than that of pre-treatment. At 1 year after treatment, the patellar tilt angle (21.2 ± 5.3) of patients in non-operation group was larger than (13.5 ± 3.5) of operation group, and the Kujala score 73.3 ± 10.5 of patient in non-operation group was lower than 84.1 ± 5.6 of operation group.

CONCLUSIONDuring 1 year after operation, arthroscopic medical retinaculum plication is a more effective treatment for acute patellar dislocation compared with plaster external fixation.

Adolescent ; Adult ; Arthroscopy ; Case-Control Studies ; Casts, Surgical ; Child ; Female ; Fracture Fixation ; Humans ; Male ; Patellar Dislocation ; surgery ; therapy ; Patellar Ligament ; surgery ; Treatment Outcome ; Young Adult

BACKGROUND AND OBJECTIVES: This study aimed to gather three-dimensional data to detect fish bones as an esophageal foreign body model and to assess the possibility that this method could be applied for cases of real fish bone foreign body (FBFB). MATERIALS AND METHOD: Fish bones from two species were collected and sizes were measured. Pork meat loaf was placed flat into a plastic box containing plaster cast and bones were laid over the meat layer. Another layer of meat was placed on the bones, then another layer of plaster cast, and the final layer of meat were placed. The meat-bone sandwich was regarded as a fish bone foreign body model of esophagus. The model was imaged using computed tomography (CT) scan and the CT data were reconstructed three-dimensionally making multi-planar reconstruction, maximal intensity projection, and volume rendering images. We tried to find tools to detect the shape and lying position of the FBFB model. The above tools were applied to 3 FBFB cases to verify effectiveness of the tools. RESULTS: Multi-planar reconstruction, maximal intensity projection, and volume rendering images were reconstructed easily. After single or more processing, all of the bones could be detected. The shape and lying positions could be detected using tools made from FBFB models. CONCLUSION: Reconstructed images of CT data readily enabled the detection of fish bone in the esophageal model and real cases.
Casts, Surgical ; Deception ; Esophagus ; Foreign Bodies* ; Meat ; Plastics