The Persistently Sensitive or Painful Osseointegrated Implant

2021 ◽  
Author(s):  
M. Anthony Pogrel
Keyword(s):  
Osseointegrated Implant

scholarly journals Loading Effect of Prosthetic Feet’s Anthropomorphicity on Transtibial Osseointegrated Implant

2021 ◽  
Vol 186 (Supplement_1) ◽  
pp. 681-687
Author(s):  
Mark Pitkin ◽  
Laurent Frossard
Keyword(s):  
Free Flow ◽  
Convex Shape ◽  
Bone Implant ◽  
Concave Shape ◽  
Early Loosening ◽  
Osseointegrated Implants ◽  
Osseointegrated Implant ◽  
Quantitative Characteristics ◽  
The Difference ◽  
The Moment

ABSTRACT Introduction Osseointegrated implants for direct skeletal attachment of transtibial prosthesis carry risks that are yet to be fully resolved, such as early loosening, mechanical failure of percutaneous and medullar parts of implant, periprosthetic issues, and infections. Underloading could lead to early loosening and infection. Overloading might compromise the bone–implant interface. Therefore, Goldilocks loading regimen applied by transtibial bone-anchored prostheses is critical for safe and efficient development of osseointegration around the implant during rehabilitation and beyond. We hypothesized that Goldilocks loading could be achieved when ambulating with a so-called anthropomorphic prosthetic ankle showing moment–angle relationship similar to a sound ankle. Materials and Methods Quantitative characteristics of the moment–angle curve of the sound ankle during dorsiflexion phase of a free-pace walking were extracted for 4 able-bodied participants (experiment 1). A slope of the moment–angle curve (stiffness) was calculated twice: for the first half and for the second half of the moment–angle curve. The difference of stiffnesses (those at the second half minus at the first half) was called the index of anthropomorphicity (IA). By definition, positive IA is associated with concave shape of the moment–angle curve, and the negative IA is associated with convex shape. In experiment 2, the same recordings and calculations were performed for 3 participants fitted with transtibial osseointegrated fixation during walking with their usual feet and the Free-Flow Foot (Ohio Willow Wood). The Free-Flow Foot was selected for its anthropomorphicity demonstrated in the previous studies with amputees using traditional socket attachment. Results The IA was 5.88 ± 0.93 for the able-bodied participants, indicating that the stiffness during the first part of the dorsiflexion phase was substantially fewer than during the second parts, as the calf muscles resisted to angulation in ankle substantially less than during the second part of dorsiflexion phase. For amputees fitted with Free-Flow Foot, IA was 2.68 ± 1.09 and −2.97 ± 2.37 for the same amputees fitted with their usual feet. Conclusions Indexes of anthropomorphicity, while of different magnitude, were positive in control able-bodied group and in the amputee group wearing Free-Flow Foot, which was qualitatively associated with concave shape of their moment–angle curves. The 3 usual feet worn by the participants were classified as nonanthropomorphic as their individual moment–angle curves were convex and the corresponding IAs were negative. Furthermore, this study showed that a foot with anthropomorphic characteristics tends to decrease maximal loads at the bone–implant interface as compared to the nonanthropomorphic feet and possibly may minimize the risks to compromise the integrity of this interface.

Magnitude and variability of loading on the osseointegrated implant of transfemoral amputees during walking

2008 ◽  
Vol 30 (7) ◽  
pp. 825-833 ◽  
Author(s):  
Winson C.C. Lee ◽  
Laurent A. Frossard ◽  
Kerstin Hagberg ◽  
Eva Haggstrom ◽  
David Lee Gow ◽  
...  
Keyword(s):  
Osseointegrated Implant ◽  
Transfemoral Amputees

Successful Placement of a BAHA Implant in a Patient With Epidermolysis Bullosa: A Case Report and Review of the Literature

2017 ◽  
Vol 126 (11) ◽  
pp. 778-780 ◽  
Author(s):  
Jason R. Brown ◽  
D. Micah Milgraum ◽  
Farhaad R. Riyaz ◽  
Marla N. Jahnke ◽  
Prasad John Thottam
Keyword(s):  
Hearing Loss ◽  
Epidermolysis Bullosa ◽  
Hearing Aids ◽  
External Auditory Canal ◽  
Skin Irritation ◽  
Minor Trauma ◽  
Mixed Hearing Loss ◽  
Osseointegrated Implant ◽  
Bone Anchored Hearing Aid ◽  
Conductive Hearing

Introduction: Epidermolysis bullosa (EB) is a spectrum of mechanobullous disorders characterized by blistering following minor trauma or traction to the skin. Hearing loss in this population is poorly described in the otolaryngology literature, and its treatment oftentimes results in external auditory canal skin irritation. Case Presentation: We present the case of a 26-year-old female with EB and mixed hearing loss unable to wear conventional hearing aids due to sequelae of the external auditory canals. An osseointegrated implant was used as other hearing aids were deemed to be too destructive of the external auditory canal skin. Management and Outcome: Our patient underwent placement of a right bone-anchored hearing aid with minimal disruption of the surrounding skin using a minimally invasive punch technique. Over 1 year of follow-up, her course was complicated by 1 simple cellulitic infection at the surgical site treated successfully with oral antibiotics. Discussion: The literature regarding the otolaryngologic manifestations of EB is sparse. The otologic sequelae are particularly overlooked in the workup and management. Based on the results of this case study, it appears that an osseointegrated implant can be safely utilized to treat significant mixed or conductive hearing loss in patients with EB.

A surgical template for aligned placement of the osseointegrated implant

1988 ◽  
Vol 59 (6) ◽  
pp. 684-688 ◽  
Author(s):  
C.M. Johnson ◽  
J.A. Lewandowski ◽  
J.F. McKinney
Keyword(s):  
Surgical Template ◽  
Osseointegrated Implant

scholarly journals Osseointegrated Implant Applications in Cosmetic and Functional Skull Base Rehabilitation

Skull Base ◽  
2011 ◽  
Vol 21 (05) ◽  
pp. 303-308 ◽  
Author(s):  
Brent Benscoter ◽  
James Jaber ◽  
Matthew Kircher ◽  
Sam Marzo ◽  
John Leonetti
Keyword(s):  
Skull Base ◽  
Osseointegrated Implant

Evaluation of Different Retention Systems on a Distal Extension Removable Partial Denture Associated With an Osseointegrated Implant

2010 ◽  
Vol 21 (3) ◽  
pp. 727-734 ◽  
Author(s):  
Eduardo Piza Pellizzer ◽  
Fellippo Ramos Verri ◽  
Rosse Mary Falcón-Antenucci ◽  
Marcelo Coelho Goiato ◽  
Humberto Gennari Filho
Keyword(s):  
Removable Partial Denture ◽  
Partial Denture ◽  
Osseointegrated Implant ◽  
Distal Extension

Histologic Analysis of the Oral Mucosa Lining Osseointegrated Implant Cover Screws: A Study in Humans

2010 ◽  
Vol 36 (1) ◽  
pp. 3-10
Author(s):  
André Alan Nahas ◽  
Paula Dechichi ◽  
Denildo de Magalhães ◽  
Andreia Espíndola Vieira
Keyword(s):  
Connective Tissue ◽  
Dental Implants ◽  
Oral Mucosa ◽  
Squamous Epithelium ◽  
Histologic Analysis ◽  
Morphologic Characteristics ◽  
Osseointegrated Implant ◽  
Oral Environment ◽  
Stratified Squamous Epithelium ◽  
Clinical Conditions

Abstract Osseointegrated dental implants are inserted into the alveolar ridge, and for them to function as tooth replacements, the surrounding tissues need to adapt to them. Just as with teeth, dental implants traverse the oral mucosa and have access to the contaminated environment of the oral cavity. Therefore, periodontal and peri-implant tissues are important for establishing a protective barrier. The aim of the present study was to perform a histologic analysis of the mucosa surrounding osseointegrated implant cover screws. For this study, 17 mucosal specimens were obtained from 12 patients during the second surgical session for implant exposure to the oral environment. After histologic preparation, specimens were sectioned perpendicularly to the mucosal surface to a thickness of about 3 µm, stained with 1% toluidine blue, and examined under light microscopy. All specimens showed a keratinized, stratified, squamous epithelium with well-defined strata. In the lamina propria, unorganized dense connective tissue was noted in the reticular layer, and in 4 samples, a chronic inflammatory infiltrate was seen in this region. The papillary layer presented tall connective papillae consisting of loose connective tissue. The results of this study confirm the hypothesis that the mucosa that conceals osseointegrated implant cover screws has the same morphologic characteristics as the alveolar masticatory mucosa. Furthermore, clinical conditions of normality in peri-implant tissues may not coincide with situations of histologic normality.

scholarly journals Five cases of occlusal reconstruction by using osseointegrated implant (Branmark system). Changes of masticatory efficiency.

1990 ◽  
Vol 36 (3) ◽  
pp. 704-711
Author(s):  
Minoru UEDA ◽  
Yoshihiro SAWAKI ◽  
Kohji EBATA ◽  
Takesi USAMI ◽  
Yasunori SUMI ◽  
...  
Keyword(s):  
Masticatory Efficiency ◽  
Osseointegrated Implant ◽  
System Changes
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