Orbital correction using alloplastic material

1971 ◽  
Vol 47 (2) ◽  
pp. 197
Author(s):  
H M H M Borghouts ◽  
A J P Otto
Keyword(s):  
Alloplastic Material ◽  
Orbital Correction

scholarly journals Maxillary Sinus Augmentation Using Ceramic Alloplastic Granules or Paste: An Experimental Study in Rabbits

2021 ◽  
Vol 9 (6) ◽  
pp. 65
Author(s):  
Michael Medeiros Costa ◽  
Daniele Botticelli ◽  
Ofer Moses ◽  
Yuki Omori ◽  
Shigeo Fujiwara ◽  
...  
Keyword(s):  
Bone Formation ◽  
Maxillary Sinus ◽  
Biological Behavior ◽  
Collagen Membrane ◽  
Alloplastic Material ◽  
New Bone Formation ◽  
Sinus Augmentation ◽  
Beta Tricalcium Phosphate ◽  
Sinus Lifting ◽  
Points Of View

Background: Due to the lack of data comparing the biological behavior of two formulations, granules and paste, of alloplastic graft from microtomographic and histomorphometric points of view, the aim of the present experiment was to compare the histomorphometric and microtomographic healing of two formulations, i.e., granules (MR sites) or paste (MR-inject sites) of an alloplastic graft composed of a combination of beta-tricalcium phosphate and hydroxyapatite used for maxillary sinus lifting. Methods: A sinus lifting procedure was carried out bilaterally in 20 rabbits, and the elevated space was filled with either paste or granules of an alloplastic material. A collagen membrane was placed on the antrostomy and the animals were euthanized after 2 or 10 weeks, 10 animals each group. Microtomographic and histological analyses were performed. Results: Higher proportions of new bone formation were found at the MR, compared to the MR-inject sites both after 2 weeks (2.65 ± 2.89% vs. 0.08 ± 0.12%; p < 0.01) and 10 weeks of healing (34.20 ± 13.86 vs. 23.28 ± 10.35%; p = 0.022). Conclusions: It was concluded that new bone formation was faster in the MR sites, compared to the MR-inject. However, a longer time of healing should be allowed to make final conclusions about the efficiency in bone formation of the paste formulation of the biomaterial used in the present study.

scholarly journals Histological Evaluation of a New Beta-Tricalcium Phosphate/Hydroxyapatite/Poly (1-Lactide-Co-Caprolactone) Composite Biomaterial in the Inflammatory Process and Repair of Critical Bone Defects

Symmetry ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1356
Author(s):  
Elizabeth Ferreira Martinez ◽  
Ana Elisa Amaro Rodrigues ◽  
Lucas Novaes Teixeira ◽  
Andrea Rodrigues Esposito ◽  
Walter Israel Rojas Cabrera ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Tricalcium Phosphate ◽  
Bone Repair ◽  
Inflammatory Process ◽  
Histological Evaluation ◽  
Alloplastic Material ◽  
Beta Tricalcium Phosphate ◽  
Evaluation Time ◽  
Synthetic Biomaterial ◽  
Critical Bone Defects

Background: The use of biomaterials is commonplace in dentistry for bone regeneration. The aim of this study was to evaluate the performance of a new alloplastic material for bone repair in critical defects and to evaluate the extent of the inflammatory process. Methods: Forty-five New Zealand rabbits were divided into five groups according to evaluation time (7, 14, 30, 60, 120 days), totaling 180 sites with six-millimeter diameter defects in their tibiae. The defects were filled with alloplastic material consisting of poly (lactide-co-caprolactone), beta-tricalcium phosphate, hydroxyapatite and nano-hydroxyapatite (BTPHP) in three different presentations: paste, block, and membrane. Comparisons were established with reference materials, such as Bio-ossTM, Bio-oss CollagenTM, and Bio-gideTM, respectively. The samples were HE-stained and evaluated for inflammatory infiltrate (scored for intensity from 0 to 3) and the presence of newly formed bone at the periphery of the defects. Results: Greater bone formation was observed for the alloplastic material and equivalent inflammatory intensity for both materials, regardless of evaluation time. At 30 days, part of the synthetic biomaterial, regardless of the presentation, was resorbed. Conclusions: We concluded that this novel alloplastic material showed osteoconductive potential, biocompatibility, low inflammatory response, and gradual resorption, thus an alternative strategy for guided bone regeneration.

scholarly journals On-the-Fly Prediction of Orbit Corrections for RTK Positioning

2006 ◽  
Vol 59 (2) ◽  
pp. 321-334 ◽  
Author(s):  
Ahmed El-Mowafy
Keyword(s):  
Equations Of Motion ◽  
Estimation Accuracy ◽  
Double Exponential ◽  
Double Exponential Smoothing ◽  
Orbital Correction ◽  
Exponential Smoothing Method ◽  
The Impact ◽  
Multiple Reference ◽  
Selection Of ◽  
Better Than

In this study, a method is presented to maintain real-time positioning at the decimetre-level accuracy during breaks in reception of the measurement corrections from multiple reference stations. The method is implemented at the rover by estimating prediction coefficients of the corrections during normal RTK positioning, and uses these coefficients to predict the corrections when reception of the corrections is temporarily lost. The paper focuses on one segment of this method, the on-the-fly prediction of orbital corrections. Frequently, only a few minutes of data representing short orbit ‘arcs’ are available to the user before losing radio transmission. Thus, it would be hard for the rover to predict the satellite positions using equations of motion. An alternative method is proposed. In this method, GPS orbital corrections are predicted as a time series and are added to the initial positions computed from the broadcast ephemeris to compute relatively accurate satellite positions. Different prediction approaches were investigated. Results show that the double exponential smoothing method and Winters' method can be successfully applied. The latter, however, has a better performance. The impact of the data length used for estimation of the prediction coefficients and the selection of seasonal lengths in Winters' method were investigated and some values were recommended. In general, the method can give orbital correction estimation accuracy of less than 5 cm after 15 minutes of prediction. This will result in a positioning accuracy better than 5 cm.

Porous Alloplastic Material Encasement of Gold Weights for the Treatment of Paralytic Lagophthalmos

1999 ◽  
Vol 15 (6) ◽  
pp. 401-406 ◽  
Author(s):  
Jean T. Jacob ◽  
Karen Pendleton ◽  
Emile Broussard ◽  
Angela Crisp ◽  
David A. DiLoreto
Keyword(s):  
Alloplastic Material ◽  
Gold Weights

scholarly journals Reconstruction of Large Cranial Defect with Alloplastic Material (Bone Cement-Cold Cure Polymethyl-Methacrylate Resin)

2010 ◽  
Vol 9 (2) ◽  
pp. 191-194 ◽  
Author(s):  
Neelakamal Hallur ◽  
Gayatri Goudar ◽  
Basavaraj Sikkerimath ◽  
Santosh S. Gudi ◽  
Ravi S. Patil
Keyword(s):  
Bone Cement ◽  
Polymethyl Methacrylate ◽  
Alloplastic Material ◽  
Cranial Defect

The use of Medpor© alloplastic material in rhinoplasty: Experience and outcomes

2012 ◽  
Vol 65 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Athanasios Skouras ◽  
George Skouras ◽  
Dimitrios Karypidis ◽  
Fygalia-Anna Asimakopoulou
Keyword(s):  
Alloplastic Material

A Pilot Study Regarding the Biomechanical Behaviour of Endosteal Implants

2013 ◽  
Vol 587 ◽  
pp. 372-378
Author(s):  
Cristian Dobreci ◽  
Alexandru Petre ◽  
Matei Traistaru
Keyword(s):  
Comparative Evaluation ◽  
Consensus Statement ◽  
The United States ◽  
National Institutes Of Health ◽  
Alloplastic Material ◽  
Generic Language ◽  
Bony Ridge ◽  
Implant Dentistry ◽  
The Moment ◽  
Endosteal Implants

An endosteal implant is an alloplastic material surgically inserted into a residual bony ridge primarily as a prosthodontic foundation. Root form implants are the design most often used. Although many names have been applied, the 1988 National Institutes of Health consensus, statement on dental implants and the American Academy of Implant Dentistry recognized the term root form. Misch developed a generic language for endosteal implants in 1992. This language is presented in an order following the chronology of insertion to restoration. In formulating the terminology, five commonly used implant systems in the United States were referenced. Ten years later, the dramatic evolution in the implant market led to reconsideration of the terminology. At the moment, over 3000 different implant systems are on the market, but the comparative evaluation is not done by objective means.

scholarly journals Complications after breast reconstruction with alloplastic material in breast cancer patients submitted or not to post mastectomy radiotherapy

2021 ◽  
Author(s):  
Silvia Radwanski Stuart ◽  
Alexandre Mendonça Munhoz ◽  
Cristiane L.G. Chaves ◽  
Eduardo Montag ◽  
Thalita C.S Cordeiro ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Reconstruction ◽  
Cancer Patients ◽  
Alloplastic Material ◽  
Breast Cancer Patients
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