Par. 9: CIRCONFERENTIAL SINTERING SYNCRISTALLIZATION MACHINE BY ARGON MONITORING
The functional implantology consists of a technique in agreement with the modern surgery trend that becomes each day less invasive. This means less pain and more immediate functional benefits for the patient.
This enables to adapt the implant structure to the patient’s anatomic characteristics, which, unusual cases excepted, does not require any preparatory surgery that uses sometimes bone transposition techniques from other anatomic districts.
The lack of traumas that defines the functional implantology becomes the most popular technique of first use leaving as second choice – and only in case of failure – the more invasive techniques.
Besides, the short and long term failure, considering the technical features of the kind of implant, implies some little lesions to the bone apparatus that goes towards reparation and so can be repeated at short.
The solidarization of the implants among them implies then a different way of distribution of the strengths acting on the structure that looses so the individuality of each single implant and takes part with a mutual work instead at the prosthesis mechanic support.
In the figures below there’s a comparison between an elaborate electro-welded structure and a traditional implant.
The equipment enables to carry out the welding directly in the patient’s oral cavity.
The welding process is electrical without taking any material of inert gas in the atmosphere in compliance with Lorenzon’s principles. The two elements to welder are placed between the two electrodes of the pincer. The energy contained in a previously loaded battery of condensers is transferred on the electrodes of the pincer; the current that flows through the points in contact with the parts to welder, warms the material up to the point of fusion, realizing so, the welded joint.
During the cycle, the junction point is protected through an Argon gas supply. This fact avoids that the point of fusion, as an effect of temperature, can react with the oxygen contained in the air producing oxidation and so the fall of the mechanical features of the used material. The heat does not reach dangerous levels as it is dissipated through the electrodes by exploiting the higher thermal conductivity of copper.
During the welding phase the equipment has to be disconnected from the electrical net. The instrument has inside a micro-controller that manages the user interface by the keys, the encoder and the display;
The process could be execute with different times and conditions through a machine setting depending on the elements to weld.
The welding cycle is subdivided into three different phases, defined as follows:
- Pre-gas phase: it is necessary to assure that the atmosphere of the welding point is free from oxygen before the start of the welding phase;
- Sintering phase followed by deep syncristallization: the percentage of energy deliverable to the electrodes; it’s obtained through the current course able to produce a molecular excitation with a variation of Titanium atomic bonds
- Post-gas phase: it is necessary to assure that the atmosphere is free from oxygen till the temperature of the joint won’t reach that level to avoid all the possible reactions in contact with the oxygen of the air.
Before every welding phase the microprocessor verifies that the correct conditions of the electrical circuit and of the welding point occur.
This means that the electrical resistance of the total circuit must be lower than the pre-arranged value. Moreover, an electronic buzzer informs the operator about the start and the end of the welding cycle.
The instrument is contained in a specific bag that allows to transport it.