BACKGROUND

In the Philippines and other developing countries, access to high-stability external fixators for traumainduced bone fracture management is limited, as modular external fixators, especially those with snap-on features, are manufactured overseas and are prohibitively expensive for most Filipino patients.

OBJECTIVE

This study aimed to assess the biomechanical performance of a locally-developed modular external fixator prototype for tibial diaphyseal fractures in comparison to available external fixators, such as Roger Anderson and Hoffmann. This provides an initial evaluation for the use of the external fixator as an alternative in terms of its stability.

METHODS

Using axial compression testing compliant with the ASTM F1541-24 standards, the ultimate strength, yield strength, safe strength, and stiffness were measured across various fixator types and tightening mechanisms, with or without the aid of a wrench. Statistical tools such as the t-test assuming equal variances, one-way analysis of variance, and Tukey-Kramer test with a 0.05 level of significance were used to determine any significant differences.

RESULTS

The mechanical performance of the external fixator prototype increased by a factor of 1.5 to 2.5 after the clamps were tightened with the wrench. However, when hand-tightened, it still performed sufficiently, showing a comparable mechanical performance with the Roger Anderson Fixator. In terms of the ultimate, safe, and yield strengths, it performed competitively in comparison with the Hoffmann system. However, there is a significant difference in stiffness between the prototype and the Hoffmann system.

CONCLUSION

The locally-developed external fixator was comparable biomechanically to the commercially available external fixators and the prototypes in different studies.

Evaluation Studies As Topic ; Developing Countries ; External Fixators ; Fractures, Bone ; Philippines ; Patients

Primary hyperparathyroidism is characterized by increased secretion of parathyroid hormone, leading to hypercalcemia and skeletal and renal complications. In the past, it was diagnosed when presenting with classical signs and symptoms. Currently, the most common clinical presentation of PHPT is asymptomatic hypercalcemia, often detected by routine screening tests. Due to the changing presentations, the diagnosis can become challenging.

We present BA, a 16-year-old female with a 2-year history of multiple fractures, progressive lytic bone lesions and pain, and kidney stones. She was initially managed as a case of polyostotic fibrous dysplasia. The workup also revealed low levels of vitamin D, hypercalcemia, increased alkaline phosphatase, and elevated intact parathyroid hormones. A neck ultrasound revealed two solid masses posterior to the right thyroid lobe.

She underwent right parathyroidectomy, and a biopsy confirmed a double parathyroid adenoma.

This report also highlights the management of the case in a low-resource setting and the importance of timely diagnosis of primary hyperthyroidism to prevent a delay in the management, which could cause unnecessary pain, bone deformities, and disability.

Human ; Female ; Adolescent: 13-18 Yrs Old ; Parathyroid Hormone ; Parathyroid Neoplasms ; Parathyroidectomy ; Phosphoric Monoester Hydrolases ; Fractures, Multiple ; Hypercalcemia ; Hyperparathyroidism ; Hyperthyroidism

OBJECTIVES

To determine and group the anthropometric norms of the zygomaticomaxillary (ZM) fixation points as a basis for optimizing the design of maxillary L-plates, from a sample population aged 19 to 59, in a tertiary government hospital in Central Luzon, Philippines.

METHODS

Design: Retrospective Review of CT scans

Setting: Tertiary Government Training Hospital

Participants: CT scan images of 110 surgical patients from the Department of ORL-HNS, obtained between January 2023 and December 2024 were measured

RESULTS

A total of 169 maxillae were analyzed, comprising 85 right and 84 left sides. The maxillary width (MW) of males (30.59 ± 2.86 mm) was found to be wider than the MW of females (29.68 ± 2.69 mm) by 0.91 mm. The zygomatic width (ZW) and its inclination angle (IA), on the other hand, were not significantly different. There were also no significant differences in the MW, ZW, and IA between the right and left sides; with the MW mean at 30.17 ± 2.81 mm and a range of 24.40 36.80 mm, the ZW mean at 20.22 ± 2.47 mm and a range of 15.40–28.30 mm, and the IA mean at 111.13 ± 11.29 degrees and a range of 78.50–131.70 degrees. To capture the range of maxillary sizes among patients, a quartile-based grouping was introduced. The MW, ZW, and IA of the L-plates were classified into small (27.80 mm, 18.30 mm, 104.15 degrees), medium (29.80 mm, 19.90 mm, 110.70 degrees), and large (32.35 mm, 22.05 mm, 120.20 degrees) sizes, respectively.

CONCLUSION

This study established reference values for the MW, ZW and IA to optimize the maxillary L-plate design for ZM fractures. The novel quartile-based grouping provided options for future L-plate measurements – potentially creating a better fit for patients, streamlining design in implant production, and improving the efficiency and outcomes of maxillofacial surgeons.

Human ; Maxillary Fractures ; Tomography ; Titanium ; Fracture Fixation

As a fundamental aspect of bone fracture treatment, fracture reduction plays a decisive role in restoring the structural integrity and function of bones. At present, fracture reduction techniques mostly rely on semi-automatic interaction methods or healthy-side bone templates for registration, which have many limitations in clinical practice. In order to enhance treatment efficiency and accuracy, an automatic fracture reduction algorithm is proposed. This algorithm utilizes the similarity of fracture cross-sections for registration, thereby reducing the workload of physicians and eliminating the need for a healthy-side bone template. Initially, the closed edge is identified and extracted by analyzing the differences in the fracture surface and the calorific value diagram of the roughness distribution. Next, the fracture section is determined by using the identified closed edge as a guideline for regional expansion and similarity matching. During the registration phase, the iterative closest point (ICP) algorithm is highly sensitive to distance. Therefore, the geometric features of point clouds are incorporated into the objective function of the registration algorithm to mitigate the influence of noise, and fracture section registration is implemented one by one. Finally, the algorithm is tested and compared on 180 simulated datasets and 16 publicly available datasets. The results show that the proposed algorithm significantly improves the registration accuracy, and the registration error of clinical bone fracture cases is controlled within 1.7 mm.
Algorithms ; Fractures, Bone/therapy* ; Humans

Objective:To compare the outcomes of simultaneous versus staged nasal bone reduction and septoplasty in the treatment of traumatic nasal bone fractures with associated septal fractures. Methods:Patients with traumatic nasal bone fractures, with or without septal fractures, were recruited from two hospitals and divided into three groups. Group A underwent simultaneous nasal bone reduction and septoplasty, Group B underwent staged nasal bone reduction and septoplasty, and Group C underwent nasal bone reduction only. Nasal appearance scores and nasal congestion Visual Analogue Scale （VAS） scores were measured preoperatively, at 2 weeks postoperatively, and at 3 months postoperatively. For Group B, scores were also recorded at 2 weeks and 3 months after the second-stage surgery. Differences were analyzed using statistical software. Results:Two weeks post-surgery, the nasal appearance scores significantly decreased in all three groups compared to preoperative scores （P< 0.01）, with no statistically significant differences between the groups （P= 0.43, 0.71, 0.58）. In Group A, the VAS score for nasal congestion decreased significantly following simultaneous surgery （P<0.01）. In Group B, there were no significant differences in nasal congestion VAS scores between pre-surgery and post-first-stage, nor between three months post-first-stage and two weeks post-first-stage （P= 0.61, 0.13）. However, the VAS scores significantly decreased after the second-stage surgery compared to pre-surgery, and three months post-second-stage surgery compared to three months post-first-stage surgery （P<0.01）. The VAS scores for nasal congestion at two weeks post-surgery in Group A were lower than those in Group B after the first-stage surgery （P<0.01）. The incidence rates of nasal adhesions post-surgery in Groups A, B, and C were 0%, 6.9%, and 4.3%, respectively. Conclusion:For traumatic nasal bone fractures with associated septal fractures, performing simultaneous nasal bone reduction and septoplasty under general anesthesia using endoscopy is more time-efficient compared to staged surgery, and it results in a lower occurrence rate of post-surgical nasal adhesions.
Humans ; Nasal Bone/surgery* ; Nasal Septum/injuries* ; Treatment Outcome ; Rhinoplasty/methods* ; Male ; Female ; Adult ; Skull Fractures/surgery* ; Fractures, Bone/surgery* ; Middle Aged ; Adolescent

Objective:To investigate the effect of intraoperative ultrasound-guided nasal bone fracture repair on the clinical outcome of pediatric patients with nasal bone fracture. Methods:A total of 83 patients with nasal bone fracture who underwent prosthesis in our hospital from June 2022 to March 2024 were selected and assigned to control group （endoscopic nasal bone fracture repair） and experimental group （ultrasound-guided nasal bone fracture repair） using random number table method. Both groups were treated with the same nursing measures after surgery. There were 41 cases in the control group and 42 cases in the experimental group. The evaluation parameters of nasal bone fracture, nasal ventilation function, nasal appearance and olfactory function score, postoperative complications and satisfaction were compared between the two groups. Results:The operation time and hospital stay were significantly lower in the experimental group than in the control group （P<0.05）, and secondary repair case （n=0） in the experimental group was significantly less than in the control group （P<0.05）. Compared to preoperative status, the minimum nasal cross-sectional area, nasal volume and total nasal expiratory volume of the two groups increased three months post-operatively, and those in the experimental group were higher （P<0.05）, nasal expiratory and inspiratory resistance, nasal appearance and olfactory disorder scores decreased and those in the experimental group were lower （P<0.05）. The postoperative complications incidence in the experimental group was lower than in the control group （7.14% and 14.63%, respectively, P>0.05）. The overall satisfaction in the experimental group was higher than in the control group（90.48% and 82.93%, respectively, P>0.05）. Conclusion:Ultrasound-guided nasal fracture repair can effectively shorten the operation time, improve the success rate, and promote the postoperative recovery of nasal appearance and nasal function, reduce complications, and enhance the overall satisfaction of children and their families.
Humans ; Nasal Bone/surgery* ; Patient Satisfaction ; Child ; Female ; Male ; Postoperative Complications ; Treatment Outcome ; Postoperative Period ; Fractures, Bone/surgery* ; Ultrasonography

Cemental tear is a rare and indetectable condition unless obvious clinical signs present with the involvement of surrounding periodontal and periapical tissues. Due to its clinical manifestations similar to common dental issues, such as vertical root fracture, primary endodontic diseases, and periodontal diseases, as well as the low awareness of cemental tear for clinicians, misdiagnosis often occurs. The critical principle for cemental tear treatment is to remove torn fragments, and overlooking fragments leads to futile therapy, which could deteriorate the conditions of the affected teeth. Therefore, accurate diagnosis and subsequent appropriate interventions are vital for managing cemental tear. Novel diagnostic tools, including cone-beam computed tomography (CBCT), microscopes, and enamel matrix derivatives, have improved early detection and management, enhancing tooth retention. The implementation of standardized diagnostic criteria and treatment protocols, combined with improved clinical awareness among dental professionals, serves to mitigate risks of diagnostic errors and suboptimal therapeutic interventions. This expert consensus reviewed the epidemiology, pathogenesis, potential predisposing factors, clinical manifestations, diagnosis, differential diagnosis, treatment, and prognosis of cemental tear, aiming to provide a clinical guideline and facilitate clinicians to have a better understanding of cemental tear.
Humans ; Dental Cementum/injuries* ; Consensus ; Diagnosis, Differential ; Cone-Beam Computed Tomography ; Tooth Fractures/therapy*

OBJECTIVES: This study aims to analyze the biomechanics of three kinds of rigid internal fixation methods for condylar head fractures. METHODS: A three dimensional finite element model of the normal mandible was constructed. It was then used to prepare condylar head fracture finite element model and three kinds of rigid internal fixation finite element model (unilateral tension screw, bilateral tension screw, tension screw+titanium plate). The mechanical characteristics and changes of the mandible condyle under the same mechanical conditions were compared among the three different rigid internal fixation methods. RESULTS: The maximum equivalent stress and displacement of the non-free end of condyle under the rigid internal fixation method of unilateral tension screw were 71.03 MPa and 4.72 mm, respectively. The maximum equivalent stress and displacement of the free end of condyle were 78.45 MPa and 4.50 mm, respectively. The maximum stress of fracture suture was 3.27 MPa. The maximum equivalent stress and displacement of the non-free end of condyle under the rigid internal fixation method of bilateral tension screw were 70.52 MPa and 4.00 mm, respectively. The maximum equivalent stress and displacement of the free end of condyle were 72.49 MPa and 3.85 mm, respectively. The maximum stress of fracture suture was 2.33 MPa. The maximum equivalent stress and maximum displacement of the non-free end of condyle under the rigid internal fixation method of tension screw+titanium plate were 67.26 MPa and 2.66 mm, respectively. The maximum equivalent stress and maximum displacement of the free end of condyle were 69.66 MPa and 2.50 mm, respectively. The maximum stress of fracture suture was 2.18 MPa. CONCLUSIONS The tension screw+titanium plate rigid internal fixation method is the most conducive to biomechanical distribution for condylar head fractures.
Fracture Fixation, Internal/instrumentation* ; Mandibular Condyle/surgery* ; Biomechanical Phenomena ; Bone Screws ; Finite Element Analysis ; Humans ; Mandibular Fractures/surgery* ; Bone Plates ; Titanium ; Stress, Mechanical

Pathological fractures after jaw cyst surgery are rare clinically but are a serious complication. Once a pathological fracture occurs, treatment time and economic costs increase, and doctors face difficulty in handling it. This article reports a case of a patient with mandibular pathological fractures after multiple odontogenic keratocyst surgery of the jaw. Mandibular lesions were located in the bilateral mandibular angles and had macrocystic changes. We adopted a conservative treatment plan, and the treatment effect was good. We also discussed and analyzed relevant literature to provide a reference for clinicians.
Humans ; Odontogenic Cysts/surgery* ; Conservative Treatment ; Postoperative Complications/therapy* ; Mandibular Fractures/etiology* ; Fractures, Spontaneous/etiology* ; Male ; Female

OBJECTIVES: This study aimed to evaluate the clinical application value of in-situ crown reattachment technique combined with pulpotomy in the treatment of complicated crown-root fractures in young permanent anterior teeth. METHODS: A prospective study was conducted on 50 children with complicated crown-root fractures in young permanent anterior teeth, who were treated at the Pediatric Dentistry Department, Hospital of Stomatology, Xi'an Jiaotong University from June 2023 to June 2024. All patients underwent in-situ crown reattachment technique combined with pulpotomy. Clinical examinations, radiographic evaluations, and subjective satisfaction surveys (using a Likert scale of 1-10) were conducted at 1, 6, and 12 months postoperatively. Data were analyzed using SPSS 23.0. RESULTS: The loss-to-follow-up rate was 12% (6/50), with 44 cases completing the 12 months of evaluation. The clinical success rate was 93.18% (41/44), and the radiographic success rate was 97.73% (43/44). The subjective satisfaction scores showed a significant improvement in masticatory function from 7.03±0.52 at 1 month to 8.07±0.92 at 12 months postoperatively (P<0.05), whereas the scores for aesthetics, comfort, and quality-of-life impact showed no statistically significant differences (P>0.05). CONCLUSIONS In-situ crown reattachment technique combined with pulpotomy effectively treats complicated crown-root fractures in young permanent anterior teeth, demonstrating a high short-term clinical success rate, significantly improved masticatory function, and minimally invasive preservation of pulp vitality and root development potential. This technique provides an optimized treatment option for dental trauma in children, although its long-term efficacy requires further validation.
Humans ; Pulpotomy ; Tooth Fractures/surgery* ; Child ; Prospective Studies ; Male ; Female ; Tooth Root/injuries* ; Tooth Crown/injuries* ; Treatment Outcome ; Incisor/injuries* ; Child, Preschool