功能状态下即刻颌骨内植入种植体的实验研究

目的 探讨功能负荷状态下即刻颌骨内植入种植体的骨整合。方法 选择３种不同种植体采用即刻拔牙后植入５只犬的下颌两个前磨牙及第一磨牙的牙槽窝内,分别于术后２、４、８、１２、２４周取同标本,作Ｘ线、光镜、扫描电镜观察。结果 ３个月时所有种植体均已达到完善骨整合,成骨量和骨小梁排列方向与Ｈｅ力负荷方向一致。结论 功能负荷即刻植入种植体有利于缩短疗程,节省费用,提高种植成功率。     

How Reliable Are Textured Implants Used in Breast Surgery? A Review of 510 Implants

Five hundred ten implants were used in 273 patients. The follow-up was between 3 months and 8 years. Four hundred nineteen prostheses were used for subglandular breast augmentation, 91 for subpectoral breast reconstruction. All the breasts were checked personally: 397 augmented breasts and 86 reconstructed breasts—94.7%. The objective criterion was the Baker classification: grades I and II, good result; and grades III and IV, poor result. Results were as follows: Baker I, 397 breasts; Baker II, 78 breasts (I + II, 98.3%); Baker III, 5 breasts; Baker IV, 3 breasts (III + IV, 1.7%). Three prostheses were removed after 3, 4, and 6 years because the textured surface was totally damaged. Two bilumen prostheses lost the saline fluid. The complication rate due to the implants was very low.     

Estimation of angulation of Brånemark titanium fixtures from radiographic thread images

Identity of film positioning and of X-ray beam angulation is essential for valid comparisons of marginal bone height around osseointegrated implants. The purpose of the present study was to analyze the possibilities of estimating fixture angulation in relation to film plane from the threads of Brånemark fixtures. 10 observers compared 62 images of fixtures with angulations ranging from 0" to ± 15" with a set of reference radiographs. Out of 620 recordings, 29% were right, and 71% differed by ≥ 1". The observers distinguished with great accuracy between negative and positive angulations. 81% of the recordings differed by 2" or less. It is concluded that the threads of Brånemark fixtures are helpful in controlling the identity of serial radiographs of implants. The test circumstances were ideal compared to clinical cases, and it is possible that accuracy will be less in patient cases.     

Prognostic factors for patients with advanced stage serous borderline tumours of the ovary.

BACKGROUND: The aim of this study was to determine the prognostic factors for patients with advanced stage, low malignant potential ovarian tumour (LMPOT). PATIENTS AND METHODS: A retrospective review of 80 patients with serous LMPOT and peritoneal implants treated at or referred to our institution was carried out. RESULTS: Sixty-five patients had non-invasive implants. Fifteen patients had invasive implants. Twenty-nine patients had stage II and 51 patients had stage III disease. Three patients died of evolutive invasive disease and four of complications of treatment. The only prognostic factor of progression to 'evolutive invasive disease' is the pathologic subtype of peritoneal implants. The 5-year rates of evolutive invasive disease in patients with non-invasive implants and invasive implants were 2% and 31%, respectively (P <0.002). CONCLUSIONS: In this series, the only prognostic factor for patients with advanced stage borderline tumour is the type of peritoneal implant. More patients died of the treatment's complications than of the disease itself. The patients' prognosis with non-invasive implants seems to be excellent, and conservative management could be discussed in younger patients.     

多孔义眼台植入手术围手术期用药的探讨

目的 探讨多孔义眼台植入手术的围手术期用药管理。方法 对116例患者(116眼)围手术期规范用药后，观察1个月。结果 仅1例凝血因子Ⅶ缺乏的患者出现重度出血和水肿，眼台取出；余均未发生术后严重的反应和并发症。结论 围手术期药物的合理使用可以有效地减轻手术的反应，减少手术的并发症。     

Success of de novo reimplantation of the artificial genitourinary sphincter

PURPOSE: We evaluate our experience with de novo reimplantation of the artificial genitourinary sphincter with a particular emphasis on mechanical and nonmechanical failure rates. De novo reimplantation is defined as implantation of an artificial sphincter following removal of a previously placed sphincter for erosion and/or infection and a waiting period of several months. MATERIALS AND METHODS: A retrospective analysis of more than 400 patients with an artificial sphincter revealed 23 who underwent de novo reimplantation between January 1983 and October 1998. All patients were men with a mean age of 66.5 years (range 16 to 88) and all had a urethral cuff. Reasons for cuff removal were erosion in 12 cases (52.2%), infection in 10 (43.5%) and intraoperative urethral injury in 1 (4.3%). Mean waiting period was 6.8 months (range 1.5 to 32) between explantation and de novo reimplantation. Mean followup was 32.6 months (range 1 to 108). RESULTS: Of the 23 patients 20 (87%) had no mechanical or nonmechanical failures and 3 (13%) had nonmechanical failures, including 2 patients (8.7%) whose cuff eroded into the urethra and 1 (4.3%) who had recurrent urinary incontinence which was successfully treated with implantation of a tandem cuff. There were no mechanical failures or infections in this group of patients. CONCLUSIONS: Our study suggests that de novo artificial sphincter reimplantation is an excellent treatment option. It is safe and associated with complication rates that are comparable to those of primary implantation.     

不同表面处理的种植入早期表面沉积物的分析研究

目的：比较两种不同表面处理的种植体在植入早期表面沉积物的差异及其骨组织反应。方法：将表面经双重酸-双氧水热处理和双重酸处理的种植体分别植入兔子胫骨内，然后，采用带能谱分析的扫描电镜观测2、4、8周带种植体的骨组织。结果：植入2周后在两组种植体表面均沉积富含钙磷层；4周时这层结构大部分消失，但双重酸-双氧水-热处理组可见较多的骨生成细胞附着在种植体表面并形成新骨。8周时两组种植体表面均附着一些新骨，但以双重酸-双氧水-热处理组相对较多。结论：两组种植体在植入早期表面均可形成富含钙磷层。     

A comparison of cochlear implant processing strategies in children using Speech Pattern Audiometry

Abstract

The aim of this study was to use Speech Pattern Audiometry (SPA) to compare phoneme perception performance between SPEAK and ACE processing strategies with children using the Nucleus 24 cochlear implant. Listeners were evaluated in terms of ability to identify two synthetic word pairs, one signalling a voicing contrast and the other signalling a place of articulation contrast. For both word pairs, ACE was associated with more ‘normal’ phoneme boundaries than SPEAK. There was also a nonsignificant trend for better identification ability with ACE compared to SPEAK. The study suggests that there may be a place for SPA as part of the clinical battery of tests used for evaluation of cochlear implant speech processing strategies in children. Copyright © 2005 John Wiley & Sons, Ltd.