No abstract available.
Retrospective Studies*

No abstract available.
Retrospective Studies*

Although most available IOL power calculation formulas perform accurately for eyes of average axial length, they have been shown to be inaccurate for eyes that have unusually short and long axial length. To compare the prediction accuracy of new Hoffer Q with SRK-II formula, we reviewed, retrospectively, a series of 225 ECCE with PCL implantation cases, including 106 Hoffer Q group and 119 SRK-II group, each of which was further divided into subgroups based on axial length. The Hoffer Q formula overestimated the refraction and resulted in more myopic shift and was less accurate than SRK-II in all length eyes, except short length eyes. In short length eyes, both formulas had similar mean error and mean absolute error but Hoffer Q formula was more accurate than the SRK-II in +/- 0.5D prediction proportion.
Retrospective Studies

Authors retrospectively analyzed 22 cases of inferior oblique overaction, which were treated by means of infetior tlblique recession from May 1983 to June 1985. We compared preoperative and postoperative hyperdeviation in the primary position and adduction, and calculated the amount of corrected hyperdeviations in the prirrtary position and adduction pet millimeter of inferior oblique recession. The results were as follows: 1. The overall success rate was 84.4 % in primary inferior oblique overaction. 2. The amounts of correction in the primary position per millimeter of inferior oblique recession were 0.69 prism diopter. 3. The amounts of correction in adduction per millimeter of inferior oblique recession were 1.94 prism diopter. 4. Decrement amounts in adduction compared to in the primary position were 1.59 prism diopter per millimeter of inferior oblique recession.
Retrospective Studies

The exposure rate of hydroxyapatite is higher in evisceration than in enucleation. This study is to compare the exposure rate of hydroxyapatite after evisceration with keratectomy and that without keratectomy. We reviewed 89medical records of the patients who had received eviscera- tion with hydroxyapatite implantation retrospectively. Of the 69 patients who had not received keratectomy during the eviceration, 9 patients (13%) had postoperative hydroxyapatite exposure. None of the 20 patients who had received keratectomy had exposure. In case of hydroxyapatite implantation after evisceration, keratectomy and 360 . circumferential sclerotomy will decrease the exposure rate of hydroxyapatite.
Durapatite* ; Humans ; Retrospective Studies

OBJECTIVE: Posterior lumbar interbody fusion (PLIF) is considered to have the best theoretical potential in promoting bony fusion of unstable vertebral segments by way of a load sharing effect of the anterior column. This study was undertaken to investigate the efficacy of PLIF with cages in chronic degenerative disc disease with Modic degeneration (changes of vertebral end plate). METHODS: A total of 597 patients underwent a PLIF with threaded fusion cages (TFC) from 1993 to 2000. Three-hundred-fifty-one patients, who could be followed for more than 3 years, were enrolled in this study. Patients were grouped into 4 categories according to Modic classification (no degeneration : 259, type 1 : 26, type 2 : 55, type 3 : 11). Clinical and radiographic data were evaluated retrospectively. RESULTS: The clinical success rate according to the Prolo's functional and economic outcome scale was 86% in patients without degeneration and 83% in patients with Modic degeneration. The clinical outcomes in each group were 88% in type 1, 84% in type 2, and 73% in type 3. The bony fusion rate was 97% in patients without degeneration and 83% in patients with Modic degeneration. The bony fusion rate in each group was 81% in type 1, 84% in type 2, and 55% in type 3. The clinical success and fusion rates were significantly lower in patients with type 3 degeneration. CONCLUSION: The PLIF with TFC has been found to be an effective procedure for lumbar spine fusion. But, the clinical outcome and bony fusion rates were significantly low in the patients with Modic type 3. The authors suggest that PLIF combined with pedicle screw fixation would be the better for them.
Humans ; Retrospective Studies ; Spine

PURPOSE: To evaluate the efficacy of endoscopic endonasal primary conjunctivodacryocysto-rhinostomy (CDCR) and revision CDCR after primary CDCR. METHODS: Twenty patients who had undergone endoscopic endonasal CDCR with Jones tube and who were followed for over 6 months at our hospital were reviewed retrospectively. Our analysis included success rate, operation time and causes of failure. RESULTS: The indications for revision CDCR were prolapse of Jones tube and inadequate tube length. The initial success rate in the primary and revision groups was 78.6% (11/14) and 100% (6/6), respectively. Two initial failures in the primary group were later successful after revision. The mean operation time in the groups was 23.9 minutes ( +/- 6.3) and 21.7 minutes ( +/- 6.1), respectively. The main causes of failure included inaccurate tube length and abnormal tube position. CONCLUSIONS: Endoscopic endonasal CDCR appears to be a reasonable approach for revision, as well as primary, because of accurate measurement of Jones tube length during surgery and the shortened operation time.
Humans ; Prolapse ; Retrospective Studies

No abstract available.
Drainage* ; Humans ; Retrospective Studies*

STUDY DESIGN: The authors retrospectively analysed the difference of clinical natures in contained vs. ruptured HIVD. OBJECTIVE: To compare contained HIVD with ruptured HIVD in respect of clinical symptoms, signs and the result after surgery. SUMMARY OF LITERATURE REVIEW: In contained disc herniation, the disc material remains beneath tile intact outer annulus. But, once disc material penetrates through the limit of posterior annulus, it is a ruptured herniation or disc extrusion/sequestration. There is few report concerning the clinical characteristics related to type of herniation. MATERIALS AND METHODS: Forty-six patients, treated by open discectomy from March 1990 to December 1994, were followed up for minimum two years. The clinical symptoms and signs including SLR, motor deficit, sensory deficit, change of DTR, and severity of radiating pain were periodically followed up on the predesigned protocol. Result: Twenty patients had contained disc and remaining 26 had ruptured disc. The mean age of contained disc was 31.4 years and that of ruptured disc was 43.3 years. In preoperative examination, 18/26 cases of patients with ruptured discs, developed pain in less than 3 months, compared with 7/20 cases of does with contained ones. Motor deficit was positive in 25/26 cases (96.2%) of ruptured discs and 12/20 cases (60%) of contained ones. 23/26 cases (80.8%) of patients with ruptured discs, had sensory deficit compared with 12/20 cases (60%) of those with contained ones. There was no significant difference in SLR and DTR change between ruptured and contained disc. CONCLUSIONS: Factors such as age, motor and sensory deficits and duration of symptoms had correlation with the type of herniation, but SLR and DTR change showed no statistical difference in this study. Clinical outcome showed no significant difference between two groups, but in ruptured group, the results were getting worse with the time goes. On the basis of this study, we concluded that the clinical symptoms and signs were different between the two groups, but surgical results showed no statistical difference.
Diskectomy ; Humans ; Retrospective Studies

STUDY DESIGN: This is a retrospective study on the effect of posterior lumbar interbody fusion for maintaining the reduction in isthmic spondylolisthesis patients. OBJECTIVES: We evaluated the efficacy of performing posterior lumbar interbody fusion for maintaining the reduction in isthmic spondylolisthesis. SUMMARY OF THE LITERATURE REVIEW: There have been many reports regarding the surgical treatment of spondylolisthesis. Although there are many reports that the clinical results have nothing to do with the reduction, many surgeons have tried to maintain the reduction. However, the question about what kind of fusion modality is the most effective for maintaining the reduction is still controversial. MATERIAL AND METHOD: Between August 2002 and January 2004, 24 patients with isthmic spondylolisthesis were operated on. 14 underwent posterolateral fusion alone (group A) and 10 underwent additional posterior interbody fusion (group B). These two groups were compared in terms of the clinical results, the radiological changes and fusion rates. RESULTS: the reduction rate were 11.81% and 7.32% in the PLF and PLF+PLIF groups, respectively (p>0.05). The reduction losses were 0.19% and 0.35% in the PLF and PLF+PLIF groups, respectively (p>0.05). The changes after fusion were 0.11% and 0.10% in the PLF and PLF+PLIF groups, respectively (p>0.05). There was no case of nonunion. The satisfaction rates were 86% and 83% in the PLF and PLF+PLIF groups, respectively (p>0.05). CONCLUSIONS: In our study, the addition of posterior interbody fusion showed no benefit in maintaining correction. If solid fusion can be obtained, then posterolateral fusion seems to be sufficient enough to maintain correction in isthmic spondylolisthesis. The authors think that further studies are mandatory because of the small number subjects in our study.
Humans ; Retrospective Studies ; Spondylolisthesis*