骨性二类错患者上、下颌骨矢状结构病因机制分析

目的:研究我国骨性二类错患者的病因机制是以上颌前突为主,还是下颌后缩为主,根据其病因机制找出合理的治疗方法。方法:在头颅定位侧位X线片上,以ANB角大于5°作为判定标准,随机选取56例骨性二类错患者为研究样本,以SNA、SNB为分析指标,分析上、下颌在矢状方向上的突、凹程度代表的结构特征,以分析骨性二类错形成的病因机制。结果:所研究的骨性二类错患者中92.9%的患者不存在上颌前突病因机制,67.9%的患者存在下颌后缩病因机制,而且这种上、下颌骨病因机制方面的差异性是有显著的统计学意义的。结论:我国骨性二类错患者是以下颌后缩为主要机制的,提示要注重对于这种骨性二类错患者的早期下颌前移矫治,而在对于生长发育高峰期已过的患者,要注意使用能代偿这种下颌后缩骨性机制的矫治设计方案。     

Rational basis for the use of a new clinical procedure in immediately loaded implant rehabilitations: a case report

This report presents a new clinical protocol that facilitates the diagnostic, surgical, and prosthetic phases of immediately loaded implant rehabilitations. The proposed technique aims to simplify recording of the centric relation, which is usually done immediately after surgery, during the surgical impression phase. This shortens operative time while meeting requirements for an accurate impression and is thus simple and cost effective. The case report of a maxillary full-arch immediately loaded implant rehabilitation in a 45-year-old patient illustrates the clinical steps in the proposed procedure and confirms its repeatability.     

La salute del cavo orale nel bambino in sovrappeso

Objectives

To evaluate food habits and oral care level of eleven and twelve years old students with the purpose of preventing obesity and oral diseases. The role of Dental Hygienists in the prevention of such problems was examined as well.

Materials and methods

A questionnaire was distributed to a sample of 90 secondary school students (41 males and 49 females).

Results

The answers point out that some improper food habits are particularly common, such as the excessive consumption of sweets and fizzy drinks, and the low consumption of fruit and vegetables.

Conclusions

Since not all children have a good oral care and follow a correct diet, the role of Dental Hygienists is paramount.     

Immediate functional loading of implants in single tooth replacement: a prospective clinical multicenter study

Objectives: The aim of the present study was to evaluate the outcome of immediate functional loading of implants in single-tooth replacement using two different installation procedures.
Material and Methods: One hundred and fifty-one subjects, who required single-tooth rehabilitation in the area of 15–25 and 35–45, were enrolled in eight private clinics in Italy. The implant sites were randomly allocated to one of the following treatment groups. In the control group, in which a standard preparation procedure for implant placement and submerged healing of the implant was used, abutment connection and loading of the implants were performed 3 months after installation. In the test group 1, a standard preparation procedure for the implant placement and immediate functional loading of implant was carried out. In the test 2 group, however, a modified implant installation procedure (osteotome technique) was used followed by immediate functional loading of the implant. Clinical and radiographic examinations were performed at 3 and 12 months of follow-up at all sites.
Results: Three implants (5.5%) from the test 2 group (osteotome preparation) and one (2%) from the test 1 group (conventional drill preparation) failed to integrate and were removed one and three months after implant installation. The mean marginal bone loss assessed at 12 months was 0.31 mm (test 1), 0.25 mm (test 2) and 0.38 mm (control) (no statistically significant differences were found between the three treatment groups.)
Conclusion: It is suggested that immediate functional loading of implants that are placed with a conventional installation technique and with sufficient primary stability may be considered as a valid treatment alternative in a single-tooth replacement.     

Temporomandibular disorders and orthognathic surgery

The relations between temporomandibular dysfunctions (TMDs) and maxillomandibular malformations requiring orthognathic surgery for correction have been the object of different studies in medical literature. The authors have performed a bibliographic revision on this issue to show the state of the art. This study, an analysis of the literature of the last 20 years, is chronologically presented. It analyzes the prevalence of TMD in patients with different types of maxillomandibular deformities undergoing orthognathic surgery and the TMD changes that occurred after an orthognathic surgical treatment. Medical studies reported in literature show a high variation of results related both to the prevalence of TMD in patients with maxillomandibular deformities and to the changes ensuing from an orthognathic surgical treatment. It has been difficult to compare the different studies because of the different methods used to individuate TMD signs and symptoms in the groups of patients analyzed, as well as the different types of orthognathic surgery performed and the specific TMD treatments used when required. It is concluded that despite the different results provided by the various studies, a certain prevalence of TMD is always present in patients with maxillomandibular deformity. This can be assumed to be within a correlation between dysgnathia and TMDs, and it asserts the necessity to treat patients who have maxillomandibular deformities and TMD by performing a specific treatment of TMD.