PMID- 12368618
OWN - NLM
STAT- MEDLINE
DCOM- 20021024
LR  - 20220311
IS  - 0023-852X (Print)
IS  - 0023-852X (Linking)
VI  - 112
IP  - 10
DP  - 2002 Oct
TI  - Hearing results with a hydroxylapatite/titanium bell partial ossicular 
      replacement prosthesis.
PG  - 1796-9
AB  - OBJECTIVES/HYPOTHESIS: To study the preliminary hearing results in patients 
      receiving a hybrid hydroxylapatite/titanium bell partial ossicular replacement 
      prosthesis (PORP) and compare these with a cohort of patients receiving a HAPEX 
      PORP. We hypothesized that the design of the hybrid PORP would enhance its 
      acoustic properties. In particular, the titanium bell, which allows the 
      prosthesis to be freestanding, would obviate the need for Gelfoam, preventing 
      fibrosis. STUDY DESIGN: A retrospective study was made of two cohorts of 
      patients. METHODS: A computerized otologic database was used to identify all 
      patients implanted with either PORP. The four-frequency (500, 1000, 2000, and 
      3000 Hz) pure-tone average air-bone gap (PTA-ABG) and ABG values for individual 
      frequencies were compared using the Student test. RESULTS: The PTA-ABG for the 
      titanium bell prosthesis was 9.8 +/- 5.7 dB, compared with 13.2 +/- 8.3 dB for 
      the HAPEX PORP, which was statistically significant ( P<.05). The average ABG 
      values at 500 and 1000 Hz were also statistically significantly improved with the 
      titanium bell PORP ( P<.05). CONCLUSIONS: The titanium bell PORP showed improved 
      postoperative results for the PTA-ABG and at 500 Hz and 1000 Hz. The prosthesis 
      is freestanding and may provide better coupling with the capitulum, factors which 
      may lead to improved hearing results in the lower frequencies.
FAU - Smith, Jason
AU  - Smith J
AD  - Department of Otolaryngology-Head and Neck Surgery, University of Arkansas for 
      Medical Sciences, Little Rock, Arkansas 72205, USA.
FAU - Gardner, Edward
AU  - Gardner E
FAU - Dornhoffer, John L
AU  - Dornhoffer JL
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Laryngoscope
JT  - The Laryngoscope
JID - 8607378
RN  - 0 (Biocompatible Materials)
RN  - 91D9GV0Z28 (Durapatite)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Aged
MH  - Audiometry, Pure-Tone
MH  - *Biocompatible Materials
MH  - Bone Conduction
MH  - Child
MH  - Child, Preschool
MH  - *Durapatite
MH  - Female
MH  - *Hearing
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Ossicular Prosthesis
MH  - Prosthesis Design
MH  - Retrospective Studies
MH  - *Titanium
EDAT- 2002/10/09 04:00
MHDA- 2002/10/31 04:00
CRDT- 2002/10/09 04:00
PHST- 2002/10/09 04:00 [pubmed]
PHST- 2002/10/31 04:00 [medline]
PHST- 2002/10/09 04:00 [entrez]
AID - 10.1097/00005537-200210000-00017 [doi]
PST - ppublish
SO  - Laryngoscope. 2002 Oct;112(10):1796-9. doi: 10.1097/00005537-200210000-00017.