A clinical and radiographic case series of implants placed with the simplified minimally invasive antral membrane elevation technique in the posterior maxilla

The aim of the present case series was to evaluate a simplified minimally invasive transalveolar sinus elevation technique utilizing calcium phosphosilicate (CPS) putty for hydraulic sinus membrane elevation. The simplified minimally invasive antral membrane elevation technique is based on the application of hydraulic pressure via a viscous bone graft that acts as an incompressible fluid.In this retrospective study, 21 patients (mean age: 48.5 ± 12 years) consecutively treated with the simplified minimally invasive transalveolar sinus elevation technique were evaluated. 28 tapered implants were placed in posterior maxillary sites with less than 6 mm of residual bone height as determined radiographically on cone beam volumetric tomographs. No sinus membrane perforations were noted and none of the patients complained of symptoms of sinusitis post-operatively (0%). The mean gain in bone height post-operatively was 10.31 ± 2.46 mm (p < 0.001). All implants successfully integrated (100% success rate) and were loaded with cement-retained prostheses.The proposed technique is a simple, efficacious, minimally invasive approach for sinus elevation that can be recommended for sites with at least 3 mm of residual height.     

种植支抗非拔牙矫治成人上颌前突畸形的临床研究

目的：探讨种植支抗非拔牙矫治成人上颌前突畸形的临床疗效。方法分析50例上颌前突畸形成人患者临床资料,依据支抗不同进行临床分组,对照组(传统强支抗组)20例和观察组(种植支抗非拔牙矫治组)30例。结果观察组上颌前突患者上中切牙切缘到Y轴的距离(U1-Y)、下中切牙切缘到Y轴的距离(L1-Y)、上第一磨牙冠近中点到Y轴的距离(U6-Y)、下中切牙长轴和下颌平面所形成的后上夹角(L1-MP)、上、下中切牙长轴之间的夹角(U1-L1)优于对照组,差异均有统计学意义(P<0.05)。结论不锈钢微螺钉种植系统矫治成人上颌前突畸形效果明显,值得临床推广应用。     

中医斜扳疗法治疗腰椎间盘突出的生物力学研究

目的对椎间盘突出等腰椎病中医推拿斜扳疗法进行生物力学建模分析研究,比对脉冲激励的传统斜扳法和简谐激励的改良斜扳法两种不同手法的力学特性。方法假设椎骨为刚体,椎间盘及周围韧带等软组织为黏弹性体,建立模拟L1～5的5自由度振动系统,对基本方程进行解析求解。结果简谐激励改良斜扳法的疗效与频率有关。在频率≤1的简谐激励改良斜扳法作用下,病变节段最大位移都大于脉冲激励传统斜扳法下的最大位移。随着病变位置下移,简谐激励改良斜扳法的损伤比相比脉冲激励传统斜扳法逐渐下降,安全性增高。结论使用频率≤1的简谐激励改良斜扳法,治疗效果优于脉冲激励传统斜扳法,且可控制损伤。     

Correlation between objective and subjective evaluation of profile in bimaxillary protrusion patients after orthodontic treatment

Objective:To correlate the objective cephalometric measurements with subjective facial esthetics in patients with bimaxillary protrusion.Materials and Methods:The sample consisted of 60 Asian-Chinese patients with bimaxillary protrusion who met the inclusion criteria. The facial esthetics of posttreatment profile and the change of profile on standardized lateral photographs were rated by a panel of 10 orthodontists and a panel of 10 lay persons with bimaxillary protrusion. All of the pretreatment and posttreatment cephalograms were digitized and traced. Twenty-five cephalometric measurements were constructed and analyzed. Correlations between the subjective facial esthetic scores and each cephalometric measurement were evaluated.Results:The cephalometric measurements correlated with the facial esthetic scores of posttreatment profile given by the orthodontist and the lay persons were basically the same. For the evaluation of posttreatment profile in bimaxillary protrusion patients, the upper and lower lip to E-line, upper and lower incisor tip to AP plane, Pg-NB distance, mentolabial angle, and sulcus depth correlated significantly with the esthetic score. For the evaluation of profile change during orthodontic treatment, retraction of upper incisor relative to AP plane or the perpendicular line through sella (line Y), change of upper incisor inclination, change of mentolabial sulcus depth, and retraction of lips relative to E-line were correlated positively with the esthetic value.Conclusions:Cephalometric measurements of lip position, incisor position, and chin morphology were key parameters correlated to facial esthetics.     

A New Pathological Classification of Lumbar Disc Protrusion and Its Clinical Significance

Lumbar disc protrusion is common. Its clinical manifestations and treatments are closely related to the pathological changes; however, the pathological classification of lumbar disc protrusion is controversial. This article introduces a new pathological classification comprising four types of lumbar disc protrusion according to intraoperative findings. The damage‐herniation type is probably caused by injury and is characterized by soft herniation, the capsule can easily be cut and the broken disc tissue blocks overflow or is easily removed. The broken disc substances should be completely removed; satisfactory results can be achieved by minimally invasive endoscopic surgery. The degeneration‐protrusion type is characterized by hard and tough protrusions and the pathological process by degeneration and proliferative reaction. The nerve should be decompressed and relaxed with minimally invasive removal of the posterior wall; the bulged or protruded disc often need not be excised. The posterior vertebral osteochondrosis with disc protrusion type is characterized by deformity of the posterior vertebral body, osteochondral nodules and intervertebral disc protrusion. The herniated and fragmented disc tissue should be removed with partially protruding osteochondral nodules. Intervertebral disc cyst is of uncertain pathogenesis and is characterized by a cyst that communicates with the disc. Resection of the cyst under microscopic or endoscopic control can achieve good results; and whether the affected disc needs to be simultaneously resected is controversial. The new pathological classification proposed here is will aid better understanding of pathological changes and pathogenesis of lumbar disc protrusion and provides a reference for diagnosis and treatment.     

护理干预对腰椎间盘突出症女性患者术后尿潴留的预防效果

目的探讨护理干预在腰椎间盘突出症术后女性患者尿潴留预防中的应用效果。方法将广东省中医院2013年12月至2014年12月收治的59例腰椎间盘突出症女性患者随机分为对照组和干预组,均采取手术治疗。对照组29例患者给予常规护理,干预组30例患者实施系统护理干预。比较两组护理效果及患者满意度。结果干预组术后尿潴留发生率及导尿率均显著低于对照组,护理满意度明显高于对照组,差异有统计学意义(P<0.05)。结论采取系统护理干预措施可有效降低尿潴留的发生率及导尿率,减轻患者痛苦,提高护理满意度。     

自攻型微型种植体支抗矫治上颌前突的临床研究

目的：探讨自攻型微型种植体支抗在严重上颌前突病例内收上颌前牙的临床疗效。方法：20例严重上颌前突拔牙矫治病例,在上颌第一磨牙与第二前磨牙之间颊侧植入微型种植体。通过头影测量分析,对矫治前后U1-NA距,U1-NA角,U1-Apog距分别进行配对t检验分析。通过上颌前牙内收量,来评判微型种植体作为强支抗的临床应用的稳定性。结果：20例平均6-8个月牙列排齐整平,10—12个月前突的前牙成功内收,拔牙间隙完全关闭,治疗过程有2枚种植体脱落,4枚种植体感染,34枚种植体整个过程保持稳定。结论：微型种植体可以提供足够稳定的强支抗内收前突前牙,矫治效果好,矫治疗程相对短。