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Flap Thickness (flap + thickness)
Selected AbstractsCoronally advanced flap: a modified surgical approach for isolated recession-type defects: Three-year resultsJOURNAL OF CLINICAL PERIODONTOLOGY, Issue 3 2007M. De Sanctis Abstract Background: Various modifications of the coronally displaced flap have been proposed in the literature with the attempt of treating gingival recession with uneven predictable results. The goal of the present study was to evaluate the effectiveness with respect to root coverage of a modification of the coronally advanced flap procedure for the treatment of isolated recession-type defects in the upper jaw. Methods: Forty isolated gingival recessions with at least 1 mm of keratinized tissue apical to the defects were treated with a modified approach to the coronally advanced flap. The main change in the surgical procedure consisted in the modification of flap thickness and dimension of surgical papillae during flap elevation. All recessions fall into Miller class I or II. The clinical re-evaluation was performed 1 year and 3 years after the surgery. Results: At the 1-year examination, the average root coverage was 3.72±1.0 mm (98.6% of the pre-operative recession depth) and 3.64±1.1 mm (96.7%) at 3 years. The gain in probing attachment amounted to 3.65±1.10 mm at 1 year and to 3.70±1.09 mm at 3 years. The average increase of keratinized tissue between the baseline and the 3-year follow-up amounted to 1.78±0.90 mm. All changes of keratinized tissue (difference between baseline and 1 year, baseline and 3 years, and between 1 and 3 years) were statistically significant. Conclusion: The modified coronally advanced surgical technique is effective in the treatment of isolated gingival recession in the upper jaw. [source] 3232: Safety and efficacy of femtosecond LASIK with reverse side cutACTA OPHTHALMOLOGICA, Issue 2010F MENICACCI Purpose Laser in situ keratomileusis has several advantages over photorefractive keratectomy when performed properly in appropriate eyes. These include faster visual recovery, less discomfort after surgery, and milder and more predictable wound healing with less risk for haze. Lamellar corneal flap formation is the critical step in successful LASIK surgery. In our study we used femtosecond lasik with 90° hinge and 100 µm thickness flap wi Methods We performed femtosecond lasik in 58 eyes of 30 patients (mean age 35 y.o.) with AMO's IntraLaseŌ FS and STAR S4 IRŌ Excimer Laser System. Criteria for inclusion were spherical myopia of -2 to -8.00 D, hyperopia up to 5 D, astigmatism miopic/hyperopic up to 4.50 D; stable refraction for 2 years; a best-spectacle corrected vision (BSCVA) of at least 20/25 in each eye. Corneal flap thickness was 100µm and hinge position was 90 degrees with reverse 120° side cut. The optical zone of the ablation was from 6.5 to 7 mm, transition zone from 8 to 9 mm. Results Controls were made at 1day, 1 and 3 months. No flap decentration was observed in any case, we had one case of epithelial sloughing and one slightly irregular flap border. Spherical equivalent was within +/- 0.50 D and the cylinder was 0.50 D or less in all patients. Only 5% of patients showed marked discomfort and avversion to light for several days. Conclusion Flap creation is probably the most important step during laser in situ keratomileusis (LASIK), and complications during it can affect the rest of the procedure and cause permanent visual loss. In our exeprience the use of 100µm thickness flap with oblique side cut demonstrated itself to be a safe procedure with a very low complications rate and good refractive results. [source] Comparison of laser in situ keratomileusis reoperation outcomes with the Moria M2 head 90 and 130 following previous photorefractive keratectomy or laser in situ keratomileusisACTA OPHTHALMOLOGICA, Issue 3 2010Antti Pitkänen Abstract. Purpose:, To compare the Moria Model Two (M2) automated microkeratome with the head 90 (intended to create a 120-,m flap) to the head 130 (intended to create a 160-,m flap) in reoperations following previous photorefractive keratectomy (PRK) or laser-assisted in situ keratomileusis (LASIK) in terms of accuracy, predictability, safety and complications of the procedure. Methods:, Eighty-five eyes of 70 consecutive patients received LASIK with the Moria M2 microkeratome. Nine previously PRK-operated eyes were reoperated with the head 90 and 37 eyes were reoperated with the head 130. Repeated LASIK was performed on 16 eyes with the head 90 and on 23 eyes with head the 130. Flap dimensions were measured and correlated to preoperative parameters. Results:, The average flap thickness in the previously PRK-operated eyes was 115.1 ,m [range 82,137 ,m, standard deviation (SD) 17.9] with the head 90 and 131.2 ,m (range 105,171 ,m, SD 19.8) with the head 130. In the previously LASIK-operated eyes, the mean flap thickness was 139.2 ,m (range 92,182 ,m, SD 23.8) with the head 90 and 141.9 ,m (range 109,179 ,m, SD 15.2) with the head 130. There were no free or incomplete flaps or flaps with buttonholes in the study. There was no statistically significant difference in postoperative uncorrected visual acuity (UCVA) between the groups. Conclusion:, In eyes with previous PRK or LASIK, LASIK reoperation offers a safe alternative for improving refractive outcomes. The Moria M2 head 90, especially in LASIK-operated eyes, does not cut thinner flaps compared to the head 130. [source] Corneal flap thickness with the Moria M2Ō microkeratome and Med-Logics calibrated LASIK bladesACTA OPHTHALMOLOGICA, Issue 7 2009Juhani Pietilä Abstract. Purpose:, This study aimed to compare and study potential factors that affect the accuracy of corneal flap thickness created in laser-assisted in situ keratomileusis (LASIK) using the Moria model 2 (M2Ō) head 130 microkeratome with the Med-Logics calibrated LASIK blades Minus 20 (ML ,20) and Minus 30 (ML ,30). Methods:, Corneal thickness in 200 (164 myopic and 36 hyperopic) eyes (100 patients) was measured by ultrasonic pachymetry preoperatively and intraoperatively after flap cutting. A total of 100 eyes were treated with the ML ,20 and 100 with the ML ,30. The right eye was operated before the left eye in each patient, using the same blade. In an additional group of 40 eyes, the left eye was operated first. Results:, Mean corneal flap thickness using the ML ,20 blade for an intended flap thickness of 140 ,m was 129.1 ,m (standard deviation [SD] 15.6, range 104,165 ,m) in right eyes and 111.5 ,m (SD 14.5, range 78,144 ,m) in left eyes. Mean corneal flap thickness using the ML ,30 blade for an intended flap thickness of 130 ,m was 127.1 ,m (SD 16.6, range 90,168 ,m) in right eyes and 109.9 ,m (SD 16.8, range 72,149 ,m) in left eyes. Conclusions:, Both microkeratome blade types cut thinner flaps than were intended. There was substantial variation in flap thickness. The first flap to be cut with a particular blade was considerably thicker than the second flap cut with the same blade. Based on these data, we recommend the use of disposable single-use microkeratomes rather than these ML blades. [source] Grafting of the posterior cornea.ACTA OPHTHALMOLOGICA, Issue 5 2000Description of a new technique with 12-month clinical results ABSTRACT. Purpose: To describe the technique of grafting only the posterior cornea and to report 12-month clinical results. Method: A two-layer technique with an anterior recipient flap created by a microkeratome and a posterior penetrating donor graft allows for a watertight wound closure and at the same time a peroperative correction of astigmatism. Four eyes (3 patients) were followed for 12 months. Results: The surgical technique could be completed in all cases without complications. The postoperative course was uneventful. The intrastromal absorbable sutures disappeared spontaneously and completely. Graft thickness showed the expected 6-month minimum while recipient flap thickness remained constant. After 1 year endothelial cell densities were 1200,2300 cells/mm2. Confocal microscopy showed activated keratocytes in the flap and quiescent keratocytes in the donor tissue by one year. The anterior chamber depth was normal in all cases. The optical quality of the cornea was studied by automatic keratometry and keratoscopy (TMS). The obtained optical properties were not optimal. Conclusions: The developed novel technique gives a better wound closure and a complication free postoperative course. It may allow for better control of postoperative astigmatism. In order to disseminate the use of the technique, eyebanks should supply posterior corneas to the surgeon. [source] | ||||||||||