Titanium detected from the soft tissue covering the titanium plate

1997 ◽  
Vol 26 ◽  
pp. 244
Author(s):  
A. Tateishi ◽  
A. Kitamura ◽  
H. Furuta ◽  
J. Fukuda ◽  
T. Inokuchi
Keyword(s):  
Soft Tissue ◽  
Titanium Plate ◽  
Soft Tissue Covering

scholarly journals Histological characterization of denticulate palatal plates in an Early Permian dissorophoid

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3727 ◽  
Author(s):  
Bryan M. Gee ◽  
Yara Haridy ◽  
Robert R. Reisz
Keyword(s):  
Soft Tissue ◽  
Histological Analysis ◽  
External Morphology ◽  
Tooth Replacement ◽  
Simple Description ◽  
Pulp Cavity ◽  
Histological Data ◽  
Tissue Implantation ◽  
Soft Tissue Covering

Denticles are small, tooth-like protrusions that are commonly found on the palate of early tetrapods. Despite their widespread taxonomic occurrence and similar external morphology to marginal teeth, it has not been rigorously tested whether denticles are structurally homologous to true teeth with features such as a pulp cavity, dentine, and enamel, or if they are bony, tooth-like protrusions. Additionally, the denticles are known to occur not only on the palatal bones but also on a mosaic of small palatal plates that is thought to have covered the interpterygoid vacuities of temnospondyls through implantation in a soft tissue covering; however, these plates have never been examined beyond a simple description of their position and external morphology. Accordingly, we performed a histological analysis of these denticulate palatal plates in a dissorophoid temnospondyl in order to characterize their microanatomy and histology. The dentition on these palatal plates has been found to be homologous with true teeth on the basis of both external morphology and histological data through the identification of features such as enamel and a pulp cavity surrounded by dentine. In addition, patterns of tooth replacement and ankylosis support the hypothesis of structural homology between these tiny teeth on the palatal plates and the much larger marginal dentition. We also provide the first histological characterization of the palatal plates, including documentation of abundant Sharpey’s fibres that provide a direct line of evidence to support the hypothesis of soft tissue implantation. Finally, we conducted a survey of the literature to determine the taxonomic distribution of these plates within Temnospondyli, providing a broader context for the presence of palatal plates and illustrating the importance of maintaining consistency in nomenclature.

scholarly journals Histological Change in Soft Tissue Surrounding Titanium Plates after Jaw Surgery

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3205 ◽  
Author(s):  
Gabriel Armencea ◽  
Dan Gheban ◽  
Florin Onisor ◽  
Ileana Mitre ◽  
Avram Manea ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Acute Inflammation ◽  
Soft Tissues ◽  
Morphological Changes ◽  
Histological Change ◽  
Plate Removal ◽  
Metallic Particles ◽  
Routine Removal ◽  
Jaw Surgery ◽  
Soft Tissue Covering

The aim of this study was to evaluate the microscopic structure of soft tissue covering titanium plates and screws used in jaw surgery (mandible fracture and orthognathic surgery), after a minimum period of 12 months from insertion, and to quantify the presence of any metallic particles. Periosteum covering the osteosynthesis plates was removed from 20 patients and examined by light microscopy in order to assess the cell morphological changes and the possibility of metal particles presence in the soft tissue. Local signs of tissue toxicity or inflammation were taken into consideration when evaluating the routine removal of titanium maxillofacial miniplates. No signs of screw loosening or acute inflammation were detected on the osteosynthesis site, but de-coloration of the periosteum was seen, and metallic particles were observed to have migrated into the soft tissues. Even if the titanium is well-tolerated by the human body in time, without severe local or general complications, our findings suggest that plate removal should be considered after bone healing has occurred.

In-Vivo Mechanical Properties of Soft Tissue Covering Bony Prominences

1978 ◽  
Vol 100 (4) ◽  
pp. 194-201 ◽  
Author(s):  
J. C. Ziegert ◽  
J. L. Lewis
Keyword(s):  
Mechanical Properties ◽  
Soft Tissue ◽  
Dynamic Loading ◽  
Static Loading ◽  
Mechanical Response ◽  
Bony Prominence ◽  
Soft Tissue Covering

In order to measure in-vivo bone accelerations, it is necessary to know the mechanical response of the soft tissue covering areas of bony prominence when a load is applied through a rigid contactor. Two methods are presented for determining this response in vivo. The first method is for quasi-static loading and the second method is for dynamic loading at approximately 2000 Hz. Results are presented for various subjects and contactor geometries.

scholarly journals Rigid Internal Fixation of Proximal Crescentic Metatarsal Osteotomy in Hallux Valgus Correction

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0046
Author(s):  
Andrew Stith ◽  
Matthew Griffin ◽  
Wesley Flint ◽  
Michael Coughlin
Keyword(s):  
Soft Tissue ◽  
Range Of Motion ◽  
Hallux Valgus ◽  
Hardware Removal ◽  
Metatarsal Osteotomy ◽  
Titanium Plate ◽  
Aofas Score ◽  
Low Profile ◽  
First Ray

Category: Bunion Introduction/Purpose: Proximal first metatarsal crescentic osteotomies are an effective means for correction of moderate to severe hallux valgus deformities. The originally described fixation construct included an intramedullary screw and a Kirschner wire which crossed the joint and required removal at 6 weeks. Elevation malunion of the first ray was also frequently noted postoperatively. The purpose of this study was to evaluate the outcomes of utilizing a low-profile titanium plate and screw construct for rigid fixation of proximal crescentic osteotomies. Methods: There were 53 patients (60 feet, 7 bilateral) with hallux valgus deformities enrolled in the study. They were all treated operatively with a proximal crescentic osteotomy and distal soft tissue correction with or without an Akin osteotomy. The crescentic osteotomy was fixed with a low-profile titanium plate and screws. Postoperatively patients were assessed at 3 months, 6 months and 1 year. Outcomes assessed included the need for hardware removal, change in elevatus of the first ray, as well as pre- and post-op VAS pain scores, radiographic evaluation, AOFAS score, MTP joint range of motion, and complications. Results: Of the 60 hallux valgus cases enrolled, 56 have completed their final follow-up (93%). At 1 year 55/56 patients had achieved radiographic union of their osteotomy. Nine patients had their hardware removed (16%). Range of motion at the 1st MTP joint decreased from 76.5 to 59.6 degrees. Hallux valgus angle improved from a mean of 28.8 to 9.6 degrees. The mean 1-2 intermetatarsal angle decreased from 14.1 to 6.4 degrees. Elevatus of the first ray increased from a mean of 2.5 mm pre-op to 3.2 mm (<1 mm) post-op. Mean VAS score improved from 4.43 to 0.68 (3.75 points). AOFAS score improved from 54.7 to 88.5 points. Complications included 4 superficial infections, 2 delayed wound healing cases and one DVT. Conclusion: Proximal crescentic metatarsal osteotomy with distal soft tissue repair is a safe and reliable method for operative treatment of hallux valgus. Utilization of a low-profile titanium plate and screw construct to rigidly fix the osteotomy yields a high rate of union and deformity correction with a low incidence of hardware removal and minimal increase in elevation of the first ray at final follow up.

Maxillofacial surgery: maxillary osteosynthesis craneomaxillofacial CMS-titanium plates

2000 ◽  
Vol 13 (03) ◽  
pp. 119-122 ◽  
Author(s):  
M. A. Vallés ◽  
J. L. Vérez-Fraguela
Keyword(s):  
Soft Tissue ◽  
Clinical Case ◽  
Maxillofacial Surgery ◽  
Small Mass ◽  
Intermaxillary Fixation ◽  
Le Fort ◽  
Type Iii ◽  
Soft Tissue Covering ◽  
Maxillary Fracture

SummaryA maxillary fracture is presented which we classified as Le Fort Type III. Treatment was by the application of two craniomaxillofacial CMS titanium plates placed intrabuccally and paramedially on both sides of the palatal suture.This technique was used as an alternative to the classical treatment using interdental wires or intermaxillary fixation.A clinical case was diagnosed with a craniofacial fracture caused from being bitten by another dog. This was successfully treated using CMS titanium plates. Many methods exist for maxillofacial fixation, from the cyanocrylates to interdental wires, etc. The indications for these plates are similar to other methods of fixation. Due to their small mass they are ideal for use in fragile bones with little soft tissue covering.

scholarly journals Measuring Skeletal Kinematics With Accelerometers on the Skin Surface

2009 ◽  
Author(s):  
K. Ayer ◽  
M. Lopez ◽  
M. C. Murphy
Keyword(s):  
Soft Tissue ◽  
Skin Surface ◽  
Joint Motion ◽  
Clinical Use ◽  
Analysis Method ◽  
Skeletal Kinematics ◽  
Motion Studies ◽  
Skeletal Frame ◽  
Soft Tissue Covering ◽  
Over Time

Gait analysis is an area within biomechanics that quantifies the motion of an animal. The most common motion analysis method uses cameras to track the position of markers on bodily surfaces over time. Although each species has a common skeletal frame to reference recorded motions, the soft tissue covering each is not rigid. Markers, therefore, experience motion relative to the bone and do not accurately portray underlying bone activity. This limits clinical use of motion studies and the understanding of joint motion.

scholarly journals Case Report: Crown Resorption in a Patient With Junctional Epidermolysis Bullosa and Amelogenesis Imperfecta With LAMB3 Gene Mutations

2021 ◽  
Vol 2 ◽  
Author(s):  
Blanca Urzúa ◽  
Susanne Krämer ◽  
Irene Morales-Bozo ◽  
Claudia Camacho ◽  
María Joao Yubero ◽  
...  
Keyword(s):  
Case Report ◽  
Soft Tissue ◽  
Epidermolysis Bullosa ◽  
Gene Mutations ◽  
Amelogenesis Imperfecta ◽  
Periodontal Pocket ◽  
Histopathological Study ◽  
Junctional Epidermolysis Bullosa ◽  
Prismatic Structure ◽  
Soft Tissue Covering

Background: Epidermolysis bullosa (EB) corresponds to a series of conditions characterized by extreme fragility of the skin and/or mucous membranes. Of the four main types of EB, junctional EB (JEB) is the most associated with alterations in the teeth. The purposes of this study were to determine the clinical, histopathological, and ultrastructural characteristics of teeth with amelogenesis imperfecta (AI) in a patient with JEB, and compare them with control teeth, and correlate the findings with the mutations present in the patient.Case Report: The study was conducted on a 10-year-old patient with JEB carrier of two recessive mutations in the LAMB3 gene and absence of the laminin-332 protein (LM-332), determined by immunofluorescence on a skin biopsy. The patient presents hypoplastic AI with very thin and yellow-brown colored enamel. Extraction of two permanent molars was performed due to pain and soft tissue covering the crown, resembling pulp polyp or hyperplastic gingiva. Light and scanning electron microscopy (SEM) revealed very thin enamel varying from complete absence to 60 μm, absence of normal prismatic structure, and presence of a cross-banding with a laminated appearance. The histopathological study revealed granulation tissue causing external crown resorption.Conclusion: Although coronary resorption has been reported in patients with syndromic and non-syndromic AI, this is the first clinicopathological report of coronary resorption in partially erupted teeth in patients with JEB with mutations in the LAMB3 gene and hypoplastic AI. In patients with this condition, the presence of partially erupted teeth with soft tissue covering part of the crown, without a periodontal pocket, and with a radiographic image of partial coronal radiolucency should lead to suspicion of external coronary resorption.

Rigid Internal Fixation of Proximal Crescentic Metatarsal Osteotomy in Hallux Valgus Correction

2019 ◽  
Vol 40 (7) ◽  
pp. 778-789 ◽  
Author(s):  
Andrew Stith ◽  
Debbie Dang ◽  
Matthew Griffin ◽  
Wesley Flint ◽  
Christopher Hirose ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Hallux Valgus ◽  
Metatarsal Osteotomy ◽  
Rigid Fixation ◽  
Titanium Plate ◽  
First Metatarsophalangeal Joint ◽  
Low Profile ◽  
First Ray ◽  
Akin Osteotomy ◽  
The Mean

Background:The purpose of this study was to evaluate outcomes utilizing a low-profile titanium plate and screw construct for rigid fixation of first ray proximal crescentic osteotomies in the treatment of hallux valgus.Methods:Forty-eight patients (53 feet) with mild to severe hallux valgus were prospectively enrolled and completed 12-month follow-up. All were treated with a proximal crescentic osteotomy, fixed with a low-profile titanium plate, distal soft tissue correction, with or without an Akin osteotomy. Recorded outcomes included change in first ray dorsiflexion angles, need for hardware removal, radiographic and clinical evaluation, pain, and American Orthopaedic Foot & Ankle Society (AOFAS) scores.Results:All patients achieved radiographic union of their osteotomy. An Akin osteotomy was performed in 83% of patients. Seventeen feet (32%) had hardware removed. First ray dorsiflexion angles increased from a mean of 1.6 degrees preoperatively to 5.0 degrees postoperatively ( P < .001). Dorsal malunion, defined as change in dorsiflexion angle greater than 1 standard deviation above the mean, occurred in 7 feet. The mean hallux valgus angle improved from 29 to 9 degrees ( P < .001). The mean 1-2 intermetatarsal angle decreased from 14 to 6 degrees ( P < .001). The first metatarsophalangeal joint range of motion decreased from 77 to 59 degrees ( P < .001). The mean visual analog scale score improved from 4 to 0.7 ( P < .0001). The mean AOFAS score improved from 55 to 89 points ( P < .001).Conclusion:Proximal crescentic metatarsal osteotomy, fixed with a low-profile titanium plate and screw construct, with distal soft tissue repair, and Akin osteotomy as indicated, was a safe and reliable method for operative treatment of hallux valgus.Level of Evidence:Level IV, retrospective case series.

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