Abstract Otology 2000 A18-1

Srecko Branica MD, PhD, Nikola Sprem MD, PhD, Ljubimko Simicic MS, Ivica Klapan MD, PhD, Krsto Dawidowsky MD

ORL Klinika Zagreb Clinical Hospital & Univ. CRO-Zagreb

Standard two-dimensional (2D) high quality CT or MRI provides valuable information on anatomical relationships between important structures in temporal bone, but this 2D CT or MRI displays some shortcomings. If two important anatomical structures are not on the same CT or MRI scan, it is not always easy to understand their relationship. Also, we can not sometimes judge the depth of the field. The aim of our study was to design a computer program for 3D imaging of anatomical structures of temporal bone. Procedure steps: 1. Transmission of video or digital signal from CT device to the computer; 2. Transmission of that signal using computer network to different locations; 3. Special software for 3D modelling, partially created and modified by ourselves for 3D computer assisted surgery; 4. Connection of the 3D-digitalizer with computer and multimedia navigation through computer during the surgery. Performing our 3D-approach in computer assisted temporal bone surgery, we were able to "look inside" the patient during surgical planning as well as at the time of the surgery.

Abstract Otology 2000 A18-2

Vasile Ciuchi MD, PhD

ENT Clinic Central Military Hospital ROM-Bucharest

The use of laser in middle ear surgery in the last 25 years was a technical progress for otologic surgery. The lasers have series of properties that depend on the wavelength, therefore with different advantages and disadvantages. The Er : Yag laser has a light emission in the infrared scale with a wavelength of 2940 nm, which doesn't penetrate liquids and doesn't produce any thermic effect on the tissue. The focused spot up to 330 µm allows very precisely applications with the micromanipulator and delicate bone cuts. In the middle ear surgery, the author used the Er:Yag laser advantages in the functional reconstruction surgery for different disease. There are presented the qualities of the laser for the otologic surgery and many of the technical possibilities that were tested in myringoplasties, osiculoplasties, tympanosclerosis and stapes surgery, Goodhill syndrome, and other reconstructions. The absence of local negative effects and the advantages of the Er:Yag laser recommend it to promote new surgical techniques and to improve the results.

Abstract Otology 2000 A18-3

Erdal Gül MD (1), Levent Olgun MD (2), Zafer Eryilmaz MD (2), Gürol Gültekin MD (2), Güldeniz Güler MD (1), Süleyman Aslanalp MD (1)

(1) Ali Cetinkaya Bulvari No:34/1 TR-Izmir
(2) SSK Izmir Educational HDSP TR-Izmir

In this video show, technique of rigid system stapedioplasty for otosclerosis will be presented and rules, hits and important points of technique will be emphasized.

Abstract Otology 2000 A18-4

Caglar Batman MD, Selcuk Inanlı MD, Alper Tutkun MD, Mehmet Ali Pehitoglu MD

ENT Department Marmara University Hospital KBB Klinigi TR-Marmara-Altunizade

Ten patients with ossicular chain defects espacially involving the long process of the incus during tympanoplasty or stapedectomy were treated using a bone cement to reconstruct the ossicular chain continuity. Preoperative audiograms were compared with 1 and 6 months after reconstruction. There was a mean pure tone average (PTA) improvement of 18-dB in patients undergoing the long process of incus to stapes suprastructure reconstruction with the bone cement. In one patient who underwent stapedectomy teflon prothesis in a short incus was supported by the bone cement experienced 12-dB improvement. Although our limited patients, the bone cement reconstruction in foreshortened incus in the middle ear surgery demostrated its feasibility and effectiveness. There was a substantial hearing improvement in all the patients.