Bipartite Patella in Children East Wenatchee WA

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Robert M Merrill, DDS
(509) 886-4746
801 Eastmont Ave
E Wenatchee, WA
Specialties
Orthodontics/Dentofacial Orthopedics

Data Provided By:
Joel Daniel Cummings, MD
820 N Chelan Ave
Wenatchee, WA
Specialties
Orthopedics
Gender
Male
Education
Medical School: Univ Of Wa Sch Of Med, Seattle Wa 98195
Graduation Year: 1999

Data Provided By:
Michael J Rossi
(509) 663-8711
820 N Chelan Ave
Wenatchee, WA
Specialty
Orthopedic Surgery

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Keary P Kunz
(509) 662-2211
520 N Chelan Ave
Wenatchee, WA
Specialty
Orthopedic Surgery

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Roger J Starkweather
(509) 662-3838
304 N Chelan Ave
Wenatchee, WA
Specialty
Orthopedic Surgery

Data Provided By:
Thomas Merrill, DDS
(509) 886-4746
804 Eastmont Ave
East Wenatchee, WA
Specialties
Orthodontics/Dentofacial Orthopedics

Data Provided By:
Hank James Vejvoda, MD
520 Chelan Avenue
Wenatchee, WA
Specialties
Orthopedics
Gender
Male
Education
Medical School: Southern Il Univ Sch Of Med, Springfield Il 62794
Graduation Year: 1998

Data Provided By:
Mark Allen Broberg, MD
(509) 765-0216
520 N Chelan Ave
Wenatchee, WA
Specialties
Orthopedics
Gender
Male
Education
Medical School: St Louis Univ Sch Of Med, St Louis Mo 63104
Graduation Year: 1980

Data Provided By:
James Andrew Dahl, MD
(509) 663-8711
820 N Chelan Ave
Wenatchee, WA
Specialties
Orthopedics
Gender
Male
Education
Medical School: Uniformed Services Univ Of The Hlth Sci, Bethesda Md 20814
Graduation Year: 1988

Data Provided By:
Eric Thorson
(509) 663-8711
820 N Chelan Ave
Wenatchee, WA
Specialty
Orthopedic Surgery

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Bipartite Patella in Children

A Patient's Guide to Bipartite Patella in Children

Introduction

Bipartite patella is a congenital condition (present at birth) that occurs when the patella (kneecap) is made of two bones instead of a single bone. Normally, the two bones would fuse together as the child grows. But in bipartite patella, they remain as two separate bones. About one per cent of the population has this condition. Boys are affected much more often than girls.

This guide will help you understand

what parts of the knee are involved how this condition develops how doctors diagnose this condition what treatment options are available Anatomy

What is the patella and what does it do?


The knee is the meeting place of two important bones in the leg, the femur (the thighbone) and the tibia (the shinbone). The patella (kneecap) is the moveable bone that sits in front of the knee. This unique bone is wrapped inside a tendon that connects the large muscles on the front of the thigh, the quadriceps muscles, to the lower leg bone.

Related Document: A Patient's Guide to Knee Anatomy

Causes

What causes this condition?

The patella starts out as a piece of fibrous cartilage. It turns into bone or ossifies as part of the growth process. Each bone has an ossification center. This is the first area of the structure to start changing into bone.

Most bones (including the patella) only have one primary ossification center. But in some cases, a second ossification center is present. Normally, these two centers of bone will fuse together during late childhood or early adolescence. If they don’t ossify together, then the two pieces of bone remain connected by fibrous or cartilage tissue. This connective tissue is called a synchondrosis .


The most common location of the second bone is the supero-lateral (upper outer) corner of the patella. But the problem can occur at the bottom of the patella or along the side of the kneecap.

Injury or direct trauma to the synchondrosis can cause a separation of this weak union leading to inflammation. Repetitive microtrauma can have the same effect. The cartilage has a limited ability to repair itself. The increased mobility between the main bone and the second ossification center further weakens the synchondrosis resulting in painful symptoms.

Symptoms

What does bipartite patella feel like?

Most of the time, there are no symptoms. Sometimes there is a bony bump or place where the bone sticks out more on one side than the other. If inflammation of the fibrous tissue between the two bones occurs, then painful symptoms develop directly over the kneecap. The pain is usually described as dull aching.There may be some swelling.

Movement of the knee can be painful, especially when bending the joint. Atrophy of the quadriceps and malalignment of the patella can lead to patellar tracking problems. Squatting, stair climbing, weight training, and strenuous activity aggravate the knee causing increased symptoms....

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