The role of cortical perforations in bone regeneration: a systematic review.

The aim of this review was to determine the effect of cortical perforations in bone regeneration considering the surgical technique. An electronic search in the PubMed (MEDLINE) and ScienceDirect databases and a hand search of the literature was conducted covering the period July 2008 to December 2018. Studies that specified the creation of perforations in the recipient area as a study variable associated with the regenerative technique were included. The quality of the randomized clinical trials included in this systematic review was also assessed. A total of 16 articles met both inclusion criteria and were eligible for analysis. Studies were grouped into three blocks according to the associated surgical technique. All studies were performed in an experimental model except for one. Qualitative assessment of the studies showed a moderate to high risk of bias of the overall studies. The evidence for creating perforations in guided bone regeneration and also in combination with autologous bone blocks in order to increase bone formation is limited according to the publications analysed. Although the number and size of perforations do not appear to interfere with the result, their effect in the upper maxilla and in the mandible should be evaluated separately due to the structural anatomical differences.

Predictive factors of difficulty in lower third molar extraction: A prospective cohort study.

BACKGROUND: Several publications have measured the difficulty of third molar removal, trying to establish the main risk factors, however several important preoperative and intraoperative variables are overlooked. MATERIAL AND METHODS: A prospective cohort study comprising a total of 130 consecutive lower third molar extractions was performed. The outcome variables used to measure the difficulty of the extraction were operation time and a 100mm visual analogue scale filled by the surgeon at the end of the surgical procedure. The predictors were divided into 4 different groups (demographic, anatomic, radiographic and operative variables). A descriptive, bivariate and multivariate analysis of the data was performed. RESULTS: Patients' weight, the presence of bulbous roots, the need to perform crown and root sectioning of the lower third molar and Pell and Gregory 123 classification significantly influenced both outcome variables (p< 0.05). CONCLUSIONS: Certain anatomical, radiological and operative variables appear to be important factors in the assessment of surgical difficulty in the extraction of lower third molars.

Survival of immediately versus delayed loaded short implants: a prospective case series study

BACKGROUND: To assess and compare survival rates of immediately and delayed loaded short implants (7 mm) in free ends of a partially edentulous jaw with moderate-severe alveolar bone resorption. MATERIAL AND METHODS: 24 patients with atrophic edentulous free-ends were included in this prospective study. Four study groups were monitored monthly and their behavior was evaluated: bridges supported only by short implants and mixed short and long implant bridge groups, both with immediate and delayed loading. Failures, bone loss, probing depth and bleeding on probing were evaluated. RESULTS: 54 Mk III Shorty TiU and 15 Brånemark System(R)MK III TiU implants with a length longer than 7mm were included in the study. Twenty-eight implants were inserted following the immediate loading protocol and 26 according a two-stage procedure, depending on the torque value. The cumulative survival rate of short implants was 87% (n=54) after a mean time of 47.72 months (range 33-62 months), showing statistically significant differences related to loading protocol (p = 0.047). Short implants immediately loaded had a higher long-term survival rate (96.4%) compared to the other study group (76.9%). Besides, short implants splinted to longer immediately loaded implants presented the highest survival rate (100%). Twenty-five (53.19%) short implants showed a bone loss of less than one millimeter after the follow-up period. Statistically significant differences were found between bleeding on probing, presence of plaque or suppuration and a higher bone loss in both loading protocols (p= 0.0 01). CONCLUSIONS: Immediate loading of short implants placed on free ends can be considered an option in the treatment protocol of patients with severe bone resorption especially if implants are splinted to others of greater length

Revisión bibliográfica de Implantología Bucofacial del año 2009. 2ª Parte / Literature review of Oral Implantology in 2009. Part 2

Debido al amplio número de publicaciones que existen sobre Implantología Bucofacial, resulta difícil para el odontólogo seleccionar y leer de forma crítica una cantidad suficiente de artículos que puedan aportarle una información útil para su praxis diaria. En este artículo pretendemos sintetizar la información más relevante que se encuentra en las revistas indexadas de la especialidad publicadas el año 2009 (AU)

The lack of the available time of the professionals involved in the Odontologic field and the difficulty to achieve a good level of information about Oral Implantology, arise the interest of the authors to expose a synthetic review of the publications. This article tries to summarize the most relevant information found in the journals of the specialty published in 2009 (AU)

Revisión bibliográfica de Implantología Bucofacial del año 2009. 1ª parte / Literature review of Oral Implantology in 2009. Part 1

Debido al amplio número de publicaciones que existen sobre Implantología Bucofacial, resulta difícil para el odontólogo seleccionar y leer de forma crítica una cantidad suficiente de artículos que puedan aportarle una información útil para su praxis diaria. En este artículo se pretende sintetizarla información más relevante que se encuentra en las revistas indexadas de la especialidad publicadas durante el año 2009 (AU)

The lack of the available time of the professionals involved in the odontologic field and the difficulty to achieve a good level of information about Oral Implantology, arise the interest of the authors to expose a synthetic review of the publications. This article tries to summarize the most relevant information found in the journals of the specialty published in 2009 (AU)