PMID- 18411054
OWN - NLM
STAT- MEDLINE
DCOM- 20081118
LR  - 20161124
IS  - 0968-0160 (Print)
IS  - 0968-0160 (Linking)
VI  - 15
IP  - 3
DP  - 2008 Jun
TI  - Resorbability of rigid beta-tricalcium phosphate wedges in open-wedge high tibial 
      osteotomy: a retrospective radiological study.
PG  - 201-5
LID - 10.1016/j.knee.2008.02.005 [doi]
AB  - The open-wedge high tibial osteotomy (OWHTO) is a well accepted treatment 
      modality for patients with osteoarthritis of the medial compartment associated 
      with genu varum. To fill in the osteotomy gap 30% macroporosity rigid 
      beta-tricalcium phosphate (beta-TCP) is frequently used as a stable resorbable 
      bone substitute. However, the resorbability of these beta-TCP wedges is not 
      known. The aim of this study was to investigate this. Twenty-one OWHTO procedures 
      in seventeen patients were performed with the use of 30% macroporosity rigid 
      beta-TCP wedges. The osteotomies were fixed using an angle-stable locking plate. 
      Conventional AP and lateral radiographs were examined in order to assess the 
      resorbability of the 30% macroporosity rigid beta-TCP wedges as a function of 
      time. A radiological classification system consisting of five phases was used to 
      monitor the resorption of the 30% macroporosity rigid beta-TCP wedges. The mean 
      duration of follow-up was 62 months (+/-23 range of 28-99). In all 21 cases, 
      remnants of the 30% macroporosity rigid beta-TCP wedges were still present at 
      maximum follow-up. Although the boundaries between 30% macroporosity rigid 
      beta-TCP wedges and bone remained slightly visible, all osteotomies were 
      completely consolidated and full osseointegration took place. In 16 out of 21 
      knees the fixation system was removed after a mean duration of 32 months (+/-19 
      range of 6-62). In six out of 21 knees a conversion to a knee arthroplasty was 
      performed after a mean duration of 56 months (+/-18 range of 37-82). The OWHTO 
      did not interfere with the placement of knee prostheses. Complete resorption of 
      30% macroporosity rigid beta-TCP wedges did not take place up to 8 years after 
      operation.
FAU - Kraal, T
AU  - Kraal T
AD  - Department of Orthopaedic Surgery, VU University Medical Center, Amsterdam, The 
      Netherlands.
FAU - Mullender, M
AU  - Mullender M
FAU - de Bruine, J H D
AU  - de Bruine JH
FAU - Reinhard, R
AU  - Reinhard R
FAU - de Gast, A
AU  - de Gast A
FAU - Kuik, D J
AU  - Kuik DJ
FAU - van Royen, B J
AU  - van Royen BJ
LA  - eng
PT  - Journal Article
DEP - 20080414
PL  - Netherlands
TA  - Knee
JT  - The Knee
JID - 9430798
RN  - 0 (Bone Substitutes)
RN  - 0 (Calcium Phosphates)
RN  - 0 (beta-tricalcium phosphate)
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Arthroplasty, Replacement, Knee
MH  - Bone Plates
MH  - *Bone Substitutes
MH  - *Calcium Phosphates
MH  - Female
MH  - Follow-Up Studies
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Osseointegration
MH  - Osteoarthritis, Knee/surgery
MH  - *Osteotomy
MH  - Postoperative Complications
MH  - Radiography
MH  - Retrospective Studies
MH  - Tibia/diagnostic imaging/*surgery
EDAT- 2008/04/16 09:00
MHDA- 2008/11/19 09:00
CRDT- 2008/04/16 09:00
PHST- 2007/12/04 00:00 [received]
PHST- 2008/02/06 00:00 [revised]
PHST- 2008/02/07 00:00 [accepted]
PHST- 2008/04/16 09:00 [pubmed]
PHST- 2008/11/19 09:00 [medline]
PHST- 2008/04/16 09:00 [entrez]
AID - S0968-0160(08)00036-7 [pii]
AID - 10.1016/j.knee.2008.02.005 [doi]
PST - ppublish
SO  - Knee. 2008 Jun;15(3):201-5. doi: 10.1016/j.knee.2008.02.005. Epub 2008 Apr 14.