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Ball implants vs Locator attachments as effective solutions for an unstable overdenture prosthesis

Ball implants vs Locator attachments as effective solutions for an unstable overdenture prosthesis

Implants with ball retainers an Locator attachments on the lower jaw are an efficient solution to avoid the instability of a total prosthesis, especially for those patients with a big tongue (macroglosia) and little bone ridge retention.


Actually, the tongue tends to grow as we grow old, and even more when we lose teeth, because the leave more place for the tongue itself.
With the tongue movements, the prosthesis comes loose easily and that is usually uncomfortable for the patients because of the lack of confidence on the prosthesis while eating or speaking.

The lower jaw keeps normally enough bone on the anterior region, even in very atrophic cases. This case, from a 77 year-old male, shows more than enough bone kept. So 3 ICX implants, all three 15” x 3,75” were easily set on the most conveniet places of the lower anterior region.

The remainig lower left wisdom tooth was left in place. At 77 years of age and without sympoms and no influence on the therapie, it can as well stay in place.

So, after two months the healing caps are changed by ball retainers and the old prosthesis is relined in order to fit the new conectors.

The prosthesis is marked below, exactly where the contact points are.

Then comes the drilling until the prosthesis rests freeely on the gums.

Reline resin is added under the prosthesis. The patient bites in the normal position and the resin selfcures in the mouth.

The rubber rings inside the stainless steel structure can be chosen in three differente degrees of hardness and retention. They wear out like every rubber component and can be therefore easily changed.

After a few minutes cure time the retainers are already fixed and the retaining force can already be appreciated, as the prosthesis stays in the right position although the tongue and the cheeks exert the same force as before.
In this case, the three ball retainers proved not to be retentive enough for the patient. Normally a four implant solution provides a more retentive, more stable, four-point trapezoidal support. Nut the patient was running on a low budget and we had to go for a three implant display, with the central implant close to the mandibular synfisis. 
By changing the three ball retainers into Locator attachments and just placing the softer plastic rings under the metal matrixes, we achieved a good degree of confort for the patient.
Bone regeneration around the neck threads of an ICX implant

Bone regeneration around the neck threads of an ICX implant

In this post I want to show the bone regenerating effect from the narrow threads around the neck of an implant, brand ICX, 8” long, 4,8” wide. You can see the one-year evolution control on this following post

Day O: a second molar on the left upper jaw was extracted on May 9, 2011 due to a tooth fracture. The X-ray was taken after the extraction. The wisdom tooth is kept behind to minimite the alveolar resortion.
Three months later, on August 16, 2001 the ICX 4,8″x8″ was set with 35 N primary stability, by means of a punch technique and small vertical sinuslift, using a collagen membrane and autogenous bone. The implant was set further distal to the center space, counting already on the future extraction. The wund is sealed with a platform-switch healing screw.
 
Two months later, on October 18, 2011, I make another X-ray check, test the stability of the implant.The bone has grown around the narrow neck threads. The bone is condensed around the apex and the impact sound is excellent, showing a good integration.
I insert the closed-impression post. Now has come the moment of the extraction of the third molar (wisdom tooth), because it is no longer necessary and, furthermore, interferes with the plastic cap that goes over the post. The impression is taken therefore after the extraction.
 
 
Nine days later, on October 27, 2011, the abutment is screwed in with 35 N torque and the crown is cemented with temporary cement until the 6-moth control.
* To see the  the one-year evolution control go this post

 

Ceramic Inlays

Ceramic Inlays

Ceramic inlays are the best way to restore posterior teeth. The round contact point in between the teeth can be prepared by the dental technician in the best way, as compared to a direct, ordinary class II filling restorations. Also, patients who present allergy to metals and who desire a highly esthetic restoration might benefit from ceramic inlays because these restorations are extremely biocompatible (ceramics are among the most compatible biomaterials) and can mimic the appearance of the natural tooth, when properly made.

Ceramic inlays are tooth-colored glass-based restorations used as fillings in back teeth (molars and premolars). These fillings are made of dental porcelain in a dental laboratory using a copy or model of the tooth preparation obtained from a mold made by the dentist. After being completed, the inlay is cemented in the tooth preparation with composite cement.

The X-Ray shows interproximal caries in between the lower right molars and inaccurate edge -to-edge termination of the class II fillings in between the molar and the premolar.
The preparation of the teeth needs to be totally extrusive, so that the ceramic inlays can be set in place easily. The retention is obtained by means of the cement composite and the adhesives. In order to obtain a good silicone impression, the papilla can be cauterized with an electro scalpel. The papilla will grow back again after the ceramic inlays are definitely set in place. The displacement of the papilla can also be achieved by using retraction threads.
The provisories for the ceramic inlays are made with a soft, light cured composite. These are the views at the moment of setting and one week after. The provisories should be easy to remove with a probe, for example, and they hold themselves in place without cement.
This are the views of the preparation in cast, and the set-up display in mouth prior to cementation. A rubber dam is used for isolation of the desired teeth, with the help of one or two clamps. Correct rubber dam isolation and correct use of adhesives are both vital for a long lasting result.
This is the final mimetic result of the ceramic and a check X-ray in order to control the contact points where the eye doesn’t reach. A small excess composite still needs to be removed from the contact point in between the molar and the premolar.
Dental technician:
Thomas Hirsch, Zahntechnikermeister, Langobardenstrasse 35/1a, 1220 Wien, Österreich
Maxillary bicuspids on both sides. Esthetic treatment with four implants.

Maxillary bicuspids on both sides. Esthetic treatment with four implants.

This is a simple case with plenty of bone, plenty of attached gingiva and quite good prosthetic space. So we might as well expect some esthetic results.

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However, it’s interesting to notice the difference in healing following the two different techniques chosen while stitching the flaps back in place.

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On the right side I simply faced both parts of the wound and sewed them up with simple and double stitches. The picture sequence is as of 0, 5 and 22 day period.

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On the left side I removed part of the gum prior to sewing both ends in place, letting the screws exposed. The healing, as we can see, is apparently healthier, no second surgery was needed to expose the healing screws, but the final result was the same on both sides. Basically, because the attached gingiva was generous on both, the gum biotype was thick and there was no need to lift up the flaps during surgery, as the bone was wide enough, too.
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These are the radiographic details. External hexagon 3.75 x13 and 10mm, . Front implant overlapped radiographically due to the pantomographic angle of exposure.

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Prosthetic phase
All except for the stump on 24, are screwed. 24 was done on stump because the intermaxillary gap was short. The antagonist 35 was also reduced in height, as you may see. When the occlusion is so well defined, I take partial casts, as they are more comfortable to obtain.
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The three screw chimneys are filled up with glass ionomer cement for this final result
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I placed an overnight acrylic splint to prevent bruxism, too.
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La Universidad de Harvard descubre que el mejor blanqueador es la fruta

La Universidad de Harvard descubre que el mejor blanqueador es la fruta

Un estudio reciente de la Universidad de Harvard revela que comer fruta diariamente es la mejor manera de blanquear los dientes. Durante un estudio clínico de tres meses se determinó que las fresas, las peladuras de naranja y el zumo de limón son los blanqueadores dentales más efectivos del mundo.

Las fresas pueden hacerse puré y aplicarse a los dientes, puesto que contienen una enzima natural que quita las manchas.


Las peladuras de naranja pueden ser usadas para eliminar manchas dentales, simplemente frotando el interior de la peladura contra la superficie del diente.
Orange peal attack
Un poco de zumo de limón y sal funcionan bien para quitar manchas. Simplemente lavar los dientes con esta mezcla o incluso sal de roca y agua caliente sirve para eliminar coloraciones, aplicándolas por la noche.
Freshly squeezed lemon juice

El bicarbonato siempre ha tenido fama de hacer maravillas en las sonrisas. Puede que tenga un sabor horrible, pero añadiendo bicarbonato al cepillo junto con algo de enjuague bucal puede ayudar a aliviar el sabor desagradable. También una mezcla de fresa añadida al bicarbonato o agua oxigenada no sólo añade un sabor dulce al mejunje, sino que que es ademas un efectivo blanqueador.

Cream in my Coffee

Mejor no beber café, té, colas o vino tinto, que son bien conocidos por su capacidad de oscurecer los dientes y causar algunas caries en el esmalte. Las manzanas y tomates pueden producir decoloración, pero también tienden a limpiar el diente. Lavarse los dientes es importante después de comer manzanas.

Recomendable, también, dejar o reducir el tabaco, ya que el tabaco mascado o fumado puede producir cambios de coloración. Evite los enjuagues de colutorio, pues algunas veces manchan los dientes. Finalmente, recuerde que un gramo de prevención vale más que un kilo de cura. Se recomienda encarecidamente ir al dentista una o dos veces al año para una limpieza y chequeo.

This breaking news is brought to you by TeethWhitener.net; which praises the best, and lambasts the worst teeth whiteners.

http://www.prweb.com/releases/prweb2010/08/prweb4357204.htm