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The biological success of any implant therapy depends on the presence of aprotective bone wall of at least 1mm around implants. This raises the issue of boneresorption; atrophied bone mass is often incompatible with the conventionalplacement of the selected implant and bone requires a surgical intervention before oralong with implant placement.

The bone expansion technique is indicated in cases of horizontal bone resorption:surgical enlargement of the ridge allows, at the end of a single session, immediateimplants placement with a success rate of 97%. Compared with other regenerativetechniques, bone expansion allows a significant reduction in the duration and cost oftreatment. Nevertheless, it seems complicated to undertake in high bone densitysites and suffer from the drawbacks of traditional instrumentation. Atraumatic boneexpansion technique is a simplified answer to the problems of the conventionaltechnique. By the association of piezosurgery and conical expanders, it allows riskreduction and optimal operating comfort.

This work aims to illustrate, through a clinical case, the protocol of atraumatic boneexpansion technique emphasizing its indications and limitations.

The use of a product that accelerates healing after surgery or trauma is a veryattractive idea. After a tissue destruction, growth factors naturally occur duringhealing phases or tissue repair or regeneration. The injection of a plateletconcentrate is followed by an increase in growth factor in the surgical site .this willenable a faster healing.

These growth factors are releasedby platelet release. To concentrate these factors itseems worthwhile to isolate platelets, concentrate and reinjecting them into thesurgical site.

Several techniques are used isolate platelets such as PRP, PRF and MPM. All theseproducts are based on platelet concentrates. The result of these products is differentin platelets concentration. However, the time and the spin speed will influence on theplatelets concentration

We know that the more the time and the spin speed are shorter, the more the numberof isolated platelets is important.

We tried in this study to determine the optimal time and spin speed to obtain thehigher concentration of platelets.

Excessive exposure of the gumsknown as the "gummysmile" is an issue affecting alarge percentage of the population. according tosomestudieswithprevalencerangingfrom 10.5% (* 1) to 29%.

This is a condition in which an overexposure of the maxillarygingiva (> 3 mm)ispresentwhilesmiling. The correct diagnosis and determiningitsetiologyis essentialfor choosing the right treatment. (* 7) (* 14). Hyperactivity of the elevator muscle ofthe lipis one of the main causes of a gummysmile. In fact, several techniques havebeen proposed for itstreatment.

The repositioning of the upperlipis a simple surgicalproceduredesigned to correct agummysmile due to hypermobility of the upperlip. Sheisdescribed as a plastic surgeryby Rubinstein in 1973.

He goal of intervention is to limit the retraction of the levator muscles of the upperlipto minimize the gumexposure and thusreduce the gummysmile.

Theman dibularameloblastomais aslow growing benign lesion, constant lycausing facialswelling. His discoveryis often for tuitous during aroutine radiological assessment that allowsto highlight clear limited radiolucent, developed most often at the expense of animpactedtooth. The systematic histological examination confirms the diagnosis. The best treatmentremains the surgicalenucleation.

The osteoperiostitis is an acute or chronic inflammatory condition of the periosteumand the underlying bone. The goal of treatment of the teenager is avulser causaltooth to prevent septic complications dental starting point for methicillin-sensitiveStaphylococcus aureus. We report the case of a young 10 year old girl anxiouswithout significant medical history with osteitis of Garré evolving for several months.The patient was put on antibiotics and review one week after resolution of clinicalsigns. One technique the type of anesthesia Akinosi was performed under conscioussedation because general anesthesia requires a more intense preparation beforetreatment and a longer recovery period after treatment. It allowed to practice withoutpain to the pressure opening of the pulp chamber of the mandibular first molar leftand facilitate drainage. The avulsion of the causal tooth is then practiced separationroots to preserve the bone capital.