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| SURGICAL
PROCEDURES - KNEE SYSTEM |
Surgical Procedures – Knee System
Indications
for Use
DESCRIPTION
Buechel-Pappas
(B-P) Total Knee Replacement System is intended to provide
primary or revision options to the surgeon to reduce or eliminate
pain, restore motion, and/or correct deformity. A cementless,
porous coated surface, BioCoat®, with a mean pore size
of 350 microns and a porosity of 35% is available on all metallic
implants in addition to non-porous coated cemented devices.
The Buechel-Pappas
Tricompartmental Knee Replacement system consists of the following
components; a Titanium-Nitride coated, Titanium alloy femoral
and tibial, and an UHMWPe bearing insert, and metal backed
patellar components made of titanium alloy, with an UHMWPe
bearing. All polyethylene patellar and tibial components are
also available.
STERILIZATION
All
metallic implant components are provided pre-sterilized by
exposure to a minimum of 25 Kilograys of gamma radiation.
All UHMWPe components are provided pre-sterilized by exposure
to ethylene oxide. (Note: The patellar component contains
both plastic and metal, and is sterilized by ETO due to the
poly, even though metallic components are present)
INDICATIONS
Prerequisite
Selection Criteria
- Tricompartmental
Knee Replacement
Indications
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Poor knee scores (59 or under) using NJOHKSS resulting from
osteoarthritis, rheumatoid arthritis or post-traumatic arthritis.
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Skeletally mature.
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Stable and intact collateral ligaments.
-
Willing to comply with the study plan and sign the Patient
Informed Consent
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Has not responded to non-operative treatment (i.e. Drug
or physical therapy) for a period of 6 months
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Intact quadriceps and hamstring mechanisms.
-
Primary or revision surgery where there is suitable bone
stock (complete cortical contact with the tibial and femoral
component edges) to provide sufficient seating of the components.
- Bilateral
surgeries: Patients under or equal to the age of 70.
Contraindications
-
Active or recent infection.
-
Neuromuscular compromise
- Osteopenia,
osteoporosis or osteomalacla causing a non-ambulatory status.
-
Active malignancy in the knee joint.
- Documented
metal allergy or intolerance.
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Mentally Incompetent.
-
Pregnancy or women planning to become pregnant during the
study.
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Patient weight over 350 pounds.
-
History of endocrine or metabolic disorder known to affect
ontogenesis (e.g. malnutrition, hypocalcemia, severe tobacco
abuse, cancer/chemotherapy).
PRECAUTIONS
Before
clinical use, the surgeon should be familiar with all aspects
of the surgical procedure. Patients should be instructed in
the limitations of the prosthesis and should be taught to
govern their activities accordingly.
WARNINGS
Improper
selection, placement, positioning, and fixation of the implant
components may result in unusual stress conditions and subsequent
reduction in the service of the prosthetic implants.
Accepted practices
should be followed meticulously in postoperative care and
the patient should be made aware of the limitations of total
joint reconstruction. Heavy labor, active sports, or other
disorders of the hip or knee could increase loading of the
ankle and decrease its function.
As in any surgical
procedure, there are risks involved in total joint replacement
in general. Complications that may develop include: early
or late infection that may require that the device be removed
and the joint fused, blood vessels and nerves may be damaged,
bones may be fractured during the procedure, the device may
loosen or break, allergic reactions to the metallic components
may occur, phlebitis may develop and cause possible lung problems,
long term swelling may occur, and there may be delayed wound
healing. Some complications may cause prolonged illness, a
draining wound, a need for blood transfusions, a need for
further major surgery, and/or permanent pain, deformity, and
inconvenience. Very rarely some complications may be fatal.
Several additional risks are also present due to anesthesia
and general surgery itself. These include, heart damage, brain
damage, paralysis either from anesthesia (i.e. epidural) or
neurological damage, tissue necrosis from tourniquet, chance
of HIV or other diseases from blood transfusions, and permanent
disability. These possible complications are not unique to
the B-P Knee Replacement, but may occur with any total joint
replacement operation. Additionally, as with any joint prosthesis,
there are postoperative activity limitations that the subject
must accept. These activity limitations are often individual
in nature, depending on the subject’s age, general health,
preoperative condition of the knee, condition of other joints,
and preoperative activity level.
Risks that can
be imposed on patients due directly to the device itself are:
- Unknown
long-term durability of the device.
-
Loosening of the device components.
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Failure of biological fixation to occur.
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Dislocation of components.
-
Decreased range of motion of the joint and/or decreased
patient mobility.
-
Possible need for revision surgery, such as an alternative
prosthesis or arthrodesis.
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Increased pain and/or deformity.
-
Unforeseeable risks or complications.
BIOCOAT®
is a registered trademark of Endotec, Inc.
ULTRACOAT® is a registered trademark of Endotec, Inc.
BUECHEL-PAPPAS is a trademark of B-P Trust
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