scholarly journals Biological Width around One- and Two-Piece Implants Retrieved from Human Jaws

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Ricardo Judgar ◽  
Gabriela Giro ◽  
Elton Zenobio ◽  
Paulo G. Coelho ◽  
Magda Feres ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Soft Tissues ◽  
Fibrous Tissue ◽  
Case Series ◽  
Surrounding Tissue ◽  
Marginal Bone Loss ◽  
Edentulous Patients ◽  
Biologic Width ◽  
Tissue Attachment ◽  
Epithelial Junction

Several histologic studies regarding peri-implant soft tissues and biological width around dental implants have been done in animals. However, these findings in human peri-implant soft tissues are very scarce. Therefore, the aim of this case series was to compare the biological width around unloaded one- and two-piece implants retrieved from human jaws. Eight partially edentulous patients received 2 test implants in the posterior mandible: one-piece (solid implants that comprise implant and abutment in one piece) and two-piece (external hexagon with a healing abutment) implants. After 4 months of healing, the implants and surrounding tissue were removed for histologic analysis. The retrieved implants showed healthy peri-implant bone and exhibited early stages of maturation. Marginal bone loss, gaps, and fibrous tissue were not present around retrieved specimens. The biologic width dimension ranged between 2.55 ± 0.16 and 3.26 ± 0.15 to one- and two-piece implants, respectively (P<0.05). This difference was influenced by the connective tissue attachment, while sulcus depth and epithelial junction presented the same dimension for both groups (P>0.05). Within the limits of this study, it could be shown that two-piece implants resulted in the thickening of the connective tissue attachment, resulting in the increase of the biological width, when compared to one-piece implants.

scholarly journals A split-mouth clinico-radiographic comparative study for evaluation of crestal bone and peri-implant soft tissues in immediately loaded implants with and without platelet-rich plasma bioactivation

2019 ◽  
Vol 13 (2) ◽  
pp. 117-122
Author(s):  
Vande Aaditee Vishnu ◽  
Pronob Kumar Sanyal ◽  
Shivsagar Tewary ◽  
Kumar Nilesh ◽  
Roy Malvika Suresh Prasad ◽  
...  
Keyword(s):  
Bone Loss ◽  
Soft Tissues ◽  
Platelet Rich Plasma ◽  
Control Site ◽  
Marginal Bone Loss ◽  
Probing Depth ◽  
Tissue Healing ◽  
Single Piece ◽  
Edentulous Patients ◽  
The Right

Background. This study evaluated the viability of platelet-rich plasma for enhancement of osseous and associated soft tissue healing around single-piece implants, subjected to immediate loading and to compare it with a control site not treated with PRP. Methods. Twenty completely edentulous patients were selected and 2 one-piece implants with O-ball head were placed for mandibular overdenture. The implant on the right side was treated with PRP whereas the left side implant served as a control. All the cases were immediately loaded and marginal bone loss, probing depth, percussion, implant mobility and peri-implantitis were assessed and compared at 3, 6, 9 and 12 months. Results. Overall analysis of the results showed less marginal bone loss, probing depth, percussion, implant mobility and periimplantitis around implants treated with PRP; however, the results were insignificant statistically. Conclusion. PRP can be used as a viable treatment adjunct in immediately loaded one-piece implants.

The Complications of Biologic Width in Esthetic Anterior Restorations: A Case Report and Review

2020 ◽  
Vol 48 ◽  
pp. 126-133
Author(s):  
Syahrial
Keyword(s):  
Connective Tissue ◽  
Case Reports ◽  
Gingival Recession ◽  
Gingival Hyperplasia ◽  
Gingival Health ◽  
Crestal Bone Loss ◽  
Precise Relationship ◽  
Specific Concept ◽  
Biologic Width ◽  
Tissue Attachment

The biologic width is a specific concept that refers to the dimensional relationship between epithelial attachment, sulcus depth, connective tissue attachment, and alveolar crest. A harmony and precise relationship between periodontal tissue and the restoration of the teeth is fundamental to ensure function and esthetic. Biologic width includes both the connective tissue attachment and the junctional epithelium and has a mean dimension of approximately 2 mm. Violation of biologic width can result in localized crestal bone loss, gingival recession, localized gingival hyperplasia, or a combination of these three. Maintenance of gingival health is one of the keys to the longevity of both the teeth and restorations. A clinical crown lengthening procedure is needed to establish the biologic width, in a condition where a restored tooth developed a subgingival caries, fractured below the gingival attachment or failed crown restoration. This article presents a case reports and review that utilized gingivectomy procedures to corrected the complications because of the violation of biologic width.

scholarly journals Expanded polytetrafluoroethylene and polypropylene in the repairing of abdominal wall defects in Wistar rats: comparative study

2006 ◽  
Vol 21 (6) ◽  
pp. 409-415 ◽  
Author(s):  
Armando José d'Acampora ◽  
Fabrícia Slomski Joli ◽  
Ricardo Tramonte
Keyword(s):  
Connective Tissue ◽  
Abdominal Wall ◽  
Polypropylene Mesh ◽  
Wistar Rats ◽  
Fibrous Tissue ◽  
Microscopic Analysis ◽  
Surrounding Tissue ◽  
Control Group ◽  
Abdominal Wall Defects ◽  
Surgical Wound

PURPOSE: To compare the use of polypropylene and PTFE meshes in the treatment of incisional hernias made experimentally on Wistar rats. METHODS: The experiment used 24 Wistar rats divided into three cohorts: C-A (ressection of a segment of abdominal wall), E-A (ressection and placement of PTFEe mesh), E-B (resection and placement of polypropylene mesh). After 28 days, the mesh and the surrounding tissue were removed and submitted to macroscopic analysis (assessment of the abdominal wall for presence of abscess in the surgical wound and/or skin necrosis, and adhesions) as well as microscopic analysis (presence of fibrosis, necrosis and abscess, counting of macrophages, mononuclears and polymorphonuclears). RESULTS: Adhesions and abscesses in the surgical wound were observed more commonly associated to the group treated with PTFEe. The size of the fibrous tissue was greater in the group treated with polypropylene. Cohort E-A showed PTFEe mesh enveloped by organized fine connective tissue. No groups presented necrosis on the site of the insertion. The highest mononuclear inflammatory reaction occurred in association to PTFEe when compared to the control group, but the findings for the polypropylene mesh were also significant when compared to the control group. In the analysis of the results obtained for cohorts E-A and E-B, a minimal occurrence of polymorphonuclears was noticed in both groups, which indicates low tissue reactivity to both materials used in the present experiment. CONCLUSION: Even with epithelization and proliferation of connective tissue, anchorage between PTFEe and abdominal wall is insufficient, which can result in reherniations.

Pediatric Cochlear Implantation: Strategies to Accommodate for Head Growth

1989 ◽  
Vol 101 (1) ◽  
pp. 38-46 ◽  
Author(s):  
David R. Marks ◽  
Robert K. Jackler ◽  
Grant J. Bates ◽  
Sheldon Greenberg
Keyword(s):  
Connective Tissue ◽  
Cochlear Implantation ◽  
Soft Tissues ◽  
Effective Means ◽  
Fibrous Tissue ◽  
Initial Study ◽  
Parietal Bone ◽  
Mastoid Cavity ◽  
Lead Wire ◽  
Head Growth

Accommodation for head growth presents one of several challenges unique to pediatric cochlear implantation. Given contemporary cochlear implant device designs, an electrode cable implanted at the age of 2 years must extend 2 to 3 cm as the head grows during childhood. In an initial study we found that model lead wires with redundant loops extended effectively when they were maintained within air-containing spaces such as the mastoid cavity or middle ear space. However, when looped leads traversed soft tissues overlying the parietal bone, they became embedded in fibrous tissue and did not extend. The present study evaluated three different configurations of expansile devices that were enclosed In polytetrafluoroethylene (PTFE) envelopes to deter fibrous ingrowth. This simple strategy was designed to ensure effective cable extension over cable pathlengths by protecting the redundant leads from any mechanically significant connective tissue ingrowth. Twelve such devices were implanted across the calvaria of four newly weaned plglets. Skull growth and changes in electrode dimensions were documented by sequential computed tomographic scans. At 3 months of age, cranial circumferences had increased substantially. Animals were then killed, the model cable extension appliances examined physically, and their implantation sites examined histologically. For all experimental devices, extension of redundant lead wires was satisfactory, and there was no mechanically significant invasion of fibrous connective tissue into the PTFE envelope. This indicates that enclosure of excess lead wire within a PTFE envelope may be an effective means of inhibiting fibrous Ingrowth. This strategy should prove useful for ensuring effective electrode cable extension In cochlear implants applied in young children.

scholarly journals Multifocal calcifying fibrous tumor mimicking malignancy

2016 ◽  
Vol 12 (2) ◽  
pp. 78-80
Author(s):  
Binita Goyal
Keyword(s):  
Soft Tissues ◽  
Fibrous Tissue ◽  
Surrounding Tissue ◽  
Lower Abdomen ◽  
Variable Size ◽  
Spindle Cells ◽  
Lymphoplasmacytic Infiltrate ◽  
Calcifying Fibrous Tumor ◽  
Calcifying Fibrous Pseudotumor ◽  
Fibrous Tumor

Calcifying fibrous tumor synonymous with calcifying fibrous pseudotumor is a rare benign mesenchymal tumor, recently been described in soft tissues. It is believed to be a true neoplasm with a tendency for nondestructive local recurrence. It presents as a single or multifocal well circumscribed but unencapsulated mass with variable size and may infiltrate into surrounding tissue. It is characterized histologically by hyalinized collagenous fibrous tissue, with bland spindle cells, psammomatous or dystrophic calcifications, and focal lymphoplasmacytic infiltrate. We present a rare case of multifocal calcifying fibrous tumors in retroperitoneum and in right adnexa in a 32-year-old female patient who presenting with pain in left lower abdomen. Imaging revealed large calcified solid mass lesion in right posterior para-renal space infiltrating into segment VI of liver and a similar smaller calcified mass in right adnexa which was confused with malignancy.JCMS Nepal. 2016;12(2):78-8.

Imaging Features of Primary Tumors of the Hand

2020 ◽  
Vol 16 ◽  
Author(s):  
Filippo Boriani ◽  
Edoardo Raposio ◽  
Costantino Errani
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Epithelioid Sarcoma ◽  
Case Series ◽  
Malignant Neoplasm ◽  
Benign Tumors ◽  
Imaging Features ◽  
Primary Tumors ◽  
Therapeutic Decisions ◽  
Tumors Of The Hand

: Musculoskeletal tumors of the hand are a rare entity and are divided into skeletal and soft tissue tumors. Either category comprises benign and malignant or even intermediate tumors. Basic radiology allows an optimal resolution of bone and related soft tissue areas, ultrasound and more sophisticated radiologic tools such as scintigraphy, CT and MRI allow a more accurate evaluation of tumor extent. Enchondroma is the most common benign tumor affecting bone, whereas chondrosarcoma is the most commonly represented malignant neoplasm localized to hand bones. In the soft tissues ganglions are the most common benign tumors and epithelioid sarcoma is the most frequently represented malignant tumor targeting hand soft tissues. The knowledge regarding diagnostic and therapeutic management of these tumors is often deriving from small case series, retrospective studies or even case reports. Evidences from prospective studies or controlled trials are limited and for this lack of clear and supported evidences data from the medical literature on the topic are controversial, in terms of demographics, clinical presentation, diagnosis prognosis and therapy.The correct recognition of the specific subtype and extension of the tumor through first line and second line radiology is essential for the surgeon, in order to effectively direct the therapeutic decisions.

Phyto extracts of Carica papaya and Tinospora cordifolia can correct thrombocytopenia in alcoholic decompensate liver cirrhosis : Case Series

2018 ◽  
Vol 3 (01) ◽  
Author(s):  
Ashok Kumar Panda
Keyword(s):  
Platelet Count ◽  
Cell Activation ◽  
Carica Papaya ◽  
Advanced Disease ◽  
Fibrous Tissue ◽  
Case Series ◽  
Tinospora Cordifolia ◽  
Randomised Control Trial ◽  
Days Of Therapy ◽  
Leaf Juice

Thrombocytopenia (platelet count less than 150 × 109/L) is a frequent complication of decompensate cirrhosis and is considered as an indicator of advanced disease. Carica papaya leaf juice has beneficial effect in thrombocytopenia associated with dengue. Tinospora cordifolia has been shown to prevent the fibrous tissue deposition of liver by modulation of kupffer cell activation. An attempt was taken to observe the usefulness of extract Carica papaya and Tinospora cordifolia in alcoholic decompensate cirrhosis. A market available product Cariden is easily available to the patients which contains Phyto extracts of Carica papaya 1100mg and Tinospora cordifolia 500mg. Phyto extracts of Carica papaya and Tinospora cordifolia can enhance the platelet count within 15 days and it can normalise the platelet within 90 days of therapy in all three cases. Further randomised control trial is suggested.

scholarly journals The Symmetric 3D Organization of Connective Tissue around Implant Abutment: A Key-Issue to Prevent Bone Resorption

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1126
Author(s):  
Giovanna Iezzi ◽  
Francesca Di Lillo ◽  
Michele Furlani ◽  
Marco Degidi ◽  
Adriano Piattelli ◽  
...  
Keyword(s):  
Bone Resorption ◽  
Connective Tissue ◽  
Inflammatory Cell ◽  
Soft Tissues ◽  
Three Dimensional ◽  
Collagen Fibers ◽  
Inflammatory Cell Infiltration ◽  
Cell Infiltration ◽  
Oral Epithelium ◽  
Implant Abutment

Symmetric and well-organized connective tissues around the longitudinal implant axis were hypothesized to decrease early bone resorption by reducing inflammatory cell infiltration. Previous studies that referred to the connective tissue around implant and abutments were based on two-dimensional investigations; however, only advanced three-dimensional characterizations could evidence the organization of connective tissue microarchitecture in the attempt of finding new strategies to reduce inflammatory cell infiltration. We retrieved three implants with a cone morse implant–abutment connection from patients; they were investigated by high-resolution X-ray phase-contrast microtomography, cross-linking the obtained information with histologic results. We observed transverse and longitudinal orientated collagen bundles intertwining with each other. In the longitudinal planes, it was observed that the closer the fiber bundles were to the implant, the more symmetric and regular their course was. The transverse bundles of collagen fibers were observed as semicircular, intersecting in the lamina propria of the mucosa and ending in the oral epithelium. No collagen fibers were found radial to the implant surface. This intertwining three-dimensional pattern seems to favor the stabilization of the soft tissues around the implants, preventing inflammatory cell apical migration and, consequently, preventing bone resorption and implant failure. This fact, according to the authors’ best knowledge, has never been reported in the literature and might be due to the physical forces acting on fibroblasts and on the collagen produced by the fibroblasts themselves, in areas close to the implant and to the symmetric geometry of the implant itself.

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