不同手术方法治疗儿童基本型外斜视对术后侧转非共同性的影响

目的：研究不同手术方法治疗儿童基本型外斜视与术后侧转非共同性发生及矫正效果相关性。

方法：回顾性研究。选取2018-06/2020-12于我院眼科接受治疗的180例基本型外斜视患儿临床资料。根据手术方式分为单眼一退一截术组(R&R组)104例和双眼外直肌后徙术组(BLR-rec组)76例。比较两组患者一般资料、手术矫正效果，以及随访期间手术斜视度数、侧转非共同性发生情况。

结果：两组患者术后3d，1、6mo视近、视远斜视度比较均无差异(均P>0.05)。R&R组术后不同时间点正位率高于BLR-rec组(P<0.05)。R&R组较BLR-rec组发生侧转非共同性的风险更低(OR=0.524， Wald χ²=4.260， P=0.039)。两组患者术后6mo主要表现在水平直肌手术眼外展方向注视，但两组患儿视远和视近侧转非共同性发生率均无差异(均P>0.05)。

结论：R&R对于儿童基本型外斜视的矫正效果优于BLR-rec术式，可降低侧转非共同性发生情况。     

Critical features of periodontal flaps with regard to blood clot stability: A review

BackgroundWound healing is a multifactorial procedure involving different cell types and biological mediators. The principles of wound healing are also applicable to periodontal tissues. The formation and stability of blood clots play a vital role in successful healing of wounds in periodontal tissues. The aim of the present review was to highlight the vital factors of periodontal flaps associated with blood clot stability.HighlightThe data on periodontal regeneration and wound healing have evolved greatly in light of several factors, including space for blood clots and blood clot stabilization. In periodontal osseous defects, the stability of blood clots seems critical to wound healing. If mechanical forces can be managed by wound stabilization, the gingival flap-tooth root interface may show connective tissue repair. However, compromised adhesion is susceptible to mechanical forces and can cause wound breakage and epithelialization.ConclusionThe presence of a thick blood clot may hinder the plasmatic circulation between the recipient bed and graft during the initial stage of healing, which is critical in cases of mucogingival surgery. Root conditioning can also determine the healing consequence by enhancing blood clot adhesion.     

老年根面龋临床初步分析

目的:分析老年人根面龋发病的危险因素,为根面龋防治选择最佳方法.方法:对门诊老年人根面龋患者的临床资料进行分析.结果:牙龈萎缩、菌斑指数、年龄、吃甜食习惯与根面龋有关,随年龄增大而根龋增加且多发于下颌磨牙、前磨牙,以近远中面为好发牙面.结论:牙龈萎缩、菌斑指数、年龄是根龋发生的危险因素.防治老年根面龋应消除各种致病因素,早期防治,以保护天然牙列的完整性.     

义龈修复与牙周菌群变化相关性研究

目的 :通过对牙周菌群在两种义龈修复前后的种属变化探讨义龈修复对严重牙龈退缩患者修复治疗的远期效果及与牙周健康的关系。方法 :严重的牙龈退缩患者经过系统性牙周治疗后随机分为常规义龈修复组及弹性义龈修复组 ,分别提取修复治疗前后各观察时段内龈沟液 ,作细菌培养和分类计数观察。结果 :对细菌形态学的记数比较显示 ,弹性材料组的螺旋体及梭杆菌的改变较常用热凝塑料组慢 ,修复 6个月后才能检测出显著性差异 ,常规材料修复 1个月后即可发现显著性变化 ;对几种特异性的牙周厌氧菌的分类培养显示在常规材料组组内差异明显 ,随时间的延长 ,组间差异更加明显。结论 :弹性塑料由于材料组织相容性好等优点 ,制作的义龈对于患者牙周健康的保持更为有利 ,是一种较为满意的治疗严重牙龈退缩的修复方法     

Periodontal tissue engineering and regeneration: Consensus Report of the Sixth European Workshop on Periodontology

Aim: To review the scientific preclinical background and clinical studies of current methods of periodontal regeneration in the treatment of infrabony defects and soft tissue deficiencies
Method: Five commissioned review papers including two systematic reviews were scrutinized by a group of experts in order to derive consensus conclusions, clinical relevance/implications and to propose future research requirements.
Results: The following five papers were assessed:
  1. Biological mediators and periodontal regeneration: a review of enamel matrix proteins at the cellular and molecular levels.
  2. Regeneration of periodontal tissues: combination of barrier membranes and grafting materials – Biological foundation and preclinical evidence.
  3. Clinical outcomes with bioactive agents alone or in combination with grafting or GTR
  4. Treatment of gingival recession with coronally advanced flap procedures. A systematic review.
  5. Soft tissue management at implant sites     

The electric toothbrush: analysis of filaments under stereomicroscope

BACKGROUND: The use of manual and electric toothbrushes has a fundamental role in primary prevention in oral hygiene. However, aggressive use of the toothbrush, especially those with non-rounded filaments, can result in lesions in both soft and hard oral tissue. Without doubt, the electric toothbrush is a useful aid for the patient, and it is therefore interesting to evaluate not only its effectiveness in plaque removal, but also the relationship between morphology of filaments and incidence of muco-gingival pathologies. OBJECTIVE: The aim of this research was to evaluate various forms of bristles of electric toothbrushes under a stereomicroscope vision. DATA SOURCES: Brushes tested included two samples of toothbrushes from six different types. Tufts from the same position on the toothbrush head were removed and examined under stereomicroscope. In this study the percentage of rounded filaments that is considered acceptable and non-traumatic was evaluated according to the Silverstone and Featherstone classification. CONCLUSIONS: Morphological analysis of electric toothbrush filaments revealed a low percentage of rounded filaments. In only four of 12 electric toothbrushes tested there were more than 50% of the filaments rounded in appearance.