Recent trends, technical concepts and components of computer-assisted orthopedic surgery systems: A comprehensive review

Computer-assisted orthopedic surgery (CAOS) systems have become one of the most important and challenging types of system in clinical orthopedics, as they enable precise treatment of musculoskeletal diseases, employing modern clinical navigation systems and surgical tools. This paper brings a comprehensive review of recent trends and possibilities of CAOS systems. There are three types of the surgical planning systems, including: systems based on the volumetric images (computer tomography (CT), magnetic resonance imaging (MRI) or ultrasound images), further systems utilize either 2D or 3D fluoroscopic images, and the last one utilizes the kinetic information about the joints and morphological information about the target bones. This complex review is focused on three fundamental aspects of CAOS systems: their essential components, types of CAOS systems, and mechanical tools used in CAOS systems. In this review, we also outline the possibilities for using ultrasound computer-assisted orthopedic surgery (UCAOS) systems as an alternative to conventionally used CAOS systems.Web of Science1923art. no. 519

A comparison of the treating mandibular fractures at the department of maxillofacial and oral surgery, Groote Schuur hospital

Magister Chirurgiae Dentium - MChDMandibular fractures are common facial injuries, occurring twice as frequently as fractures of the bones of the midface. Only the nasal bones are fractured more often as the result of trauma to the face (Olson eta/ 1982; Theriorletal 1987; Shepherd et al 1988; Dodson et al 1990; Lownie et al 1996). In many oral and maxillofacial units, the treatment of fractures of the mandible form the major proportion of the services rendered. Internationally it is accepted that there are two methods of treatment for fractures of the mandible, namely, closed and open reduction. Closed reductions are performed in dentate patients either under local or general anaesthesia. This method entails the placement of eyelet wires between or around teeth in both arches and then placing the patient into intermaxillary fixation. This is the method of choice when treating an undisplaced fracture of the mandible

Etiology and patterns of mandibular fractures in cats

IntroductionMandibular fractures resulting from maxillofacial trauma often require surgical intervention to promote proper bone healing. Understanding the etiology and patterns of mandibular fractures is crucial for selecting appropriate surgical treatment options. The objectives of this study were (1) to examine the etiology and location of mandibular fractures at and distal to the mandibular canine tooth and (2) to identify patterns and risk factors associated with these fractures in client-owned cats.MethodsMedical records and computed tomography (CT) scans of cats with at least one mandibular fracture located at or distal to the mandibular canine tooth were reviewed. The CT images of mandibles with ramus fractures were segmented and reconstructed into 3D models using the Mimics Innovation Suite (Materialise, Leuven, Belgium). These models were then printed in white or clear resin using an SLA 3D printer (Formlabs©) to identify fracture patterns.ResultsA total of 38 cats with 62 mandibular fractures were included in the study. The most common fracture location was the mandibular ramus (51.6%, excluding the condylar process), followed by the condylar process (33.9%). Fractures were often severely displaced and fragmented. The evaluation of the 3D-printed models identified three main patterns, which accounted for 75% of the fractures in the mandibular ramus. Fracture etiology was significantly associated with the pattern type (p = 0.028). Animal altercations were 9.3 times more likely to cause a pattern A fracture than an unknown cause.Discussion3D printing was useful for visualizing and describing the patterns of mandibular fractures in cats. Pattern A fractures were most commonly associated with animal altercations

PRELIMINARY FINDINGS OF A POTENZIATED PIEZOSURGERGICAL DEVICE AT THE RABBIT SKULL

The number of available ultrasonic osteotomes has remarkably increased. In vitro and in vivo studies have revealed differences between conventional osteotomes, such as rotating or sawing devices, and ultrasound-supported osteotomes (Piezosurgery®) regarding the micromorphology and roughness values of osteotomized bone surfaces. Objective: the present study compares the micro-morphologies and roughness values of osteotomized bone surfaces after the application of rotating and sawing devices, Piezosurgery Medical® and Piezosurgery Medical New Generation Powerful Handpiece. Methods: Fresh, standard-sized bony samples were taken from a rabbit skull using the following osteotomes: rotating and sawing devices, Piezosurgery Medical® and a Piezosurgery Medical New Generation Powerful Handpiece. The required duration of time for each osteotomy was recorded. Micromorphologies and roughness values to characterize the bone surfaces following the different osteotomy methods were described. The prepared surfaces were examined via light microscopy, environmental surface electron microscopy (ESEM), transmission electron microscopy (TEM), confocal laser scanning microscopy (CLSM) and atomic force microscopy. The selective cutting of mineralized tissues while preserving adjacent soft tissue (dura mater and nervous tissue) was studied. Bone necrosis of the osteotomy sites and the vitality of the osteocytes near the sectional plane were investigated, as well as the proportion of apoptosis or cell degeneration. Results and Conclusions: The potential positive effects on bone healing and reossification associated with different devices were evaluated and the comparative analysis among the different devices used was performed, in order to determine the best osteotomes to be employed during cranio-facial surgery

Emerging Biomedical and Clinical Applications of 3D-Printed Poly(Lactic Acid)-Based Devices and Delivery Systems

Poly(lactic acid) (PLA) is widely used in the field of medicine due to its biocompatibility, versatility, and cost-effectiveness. Three-dimensional (3D) printing or the systematic deposition of PLA in layers has enabled the fabrication of customized scaffolds for various biomedical and clinical applications. In tissue engineering and regenerative medicine, 3D-printed PLA has been mostly used to generate bone tissue scaffolds, typically in combination with different polymers and ceramics. PLA\u27s versatility has also allowed the development of drug-eluting constructs for the controlled release of various agents, such as antibiotics, antivirals, anti-hypertensives, chemotherapeutics, hormones, and vitamins. Additionally, 3D-printed PLA has recently been used to develop diagnostic electrodes, prostheses, orthoses, surgical instruments, and radiotherapy devices. PLA has provided a cost-effective, accessible, and safer means of improving patient care through surgical and dosimetry guides, as well as enhancing medical education through training models and simulators. Overall, the widespread use of 3D-printed PLA in biomedical and clinical settings is expected to persistently stimulate biomedical innovation and revolutionize patient care and healthcare delivery

Quality of life patients after treatment of mandibular fractures with ORIF in oral surgery departement of Dr. Sardjito general hospital

Management of mandibular fracture using open reduction Internal fixation (ORIF) method is one of the ideal treatments for single and multiple mandibular fractures. The aim of this study was to determine the quality of life of patients after the treatment of mandibular fractures with ORIF using miniplate in single and multiple mandibular fractures. This research used case-control by recalling 43 research subjects in the oral surgery department Dr Sardjito general hospital between 2013 and 2017, that consisted of patients suffering from 23 single fractures and 20 multiple mandibular fractures. Each fracture would be examined clinically and subjectively. Clinical examination parameters were conducted using the mandibular mobility index (MMI) consisting of mouth opening assessment, left and right lateral mandibular excursion, and mandibular protrusive movement. Subjective parameters were performed based on general oral health asseesment index (GOHAI) questionnaire to assess physiological aspects, psychosocial aspects, and pain. The results of the chi-square test statistic study showed that the quality of life of a patient with a single mandibular fracture was better than that of multiple mandibular fractures based on MMI and GOHAI examinations. It was concluded that patients with a single mandibular fracture had a younger age, longer time adaptation and have a better quality of life