Seven-eighths Crown Preparation

Three Quarter Tooth Restoration

After verifying the alignment, remove tooth structure between the guide grooves with a smooth continuous motion and place a cervical chamfer Fig. 10-7 . Carry the diamond into the proximal embrasure and reduce the proximal wall Fig. 10-3, E and F . For proper reduction of the axial tooth surface, it is important to understand the factors that determine correct positioning of the proximal groove. A proximal groove is placed parallel to the path of withdrawal. Normally, unsupported tooth...

Treatment of Furcation Involvement

Classification Furcation

Diagnosis and treatment of furcation involvement of multirooted teeth is one of the more difficult Fig. 5-25. Normal relationship of the CEJ and the osseous crest. FromBaimaRF J Prosthet Dent 56 138, 1986. Fig. 5-25. Normal relationship of the CEJ and the osseous crest. FromBaimaRF J Prosthet Dent 56 138, 1986. problems encountered in the periodontal-restora-tive dentistry continuum. Familiarity with the furcation's anatomic and morphologic variations is essential when formulating a treatment...

Pinledge Preparations

Pinledge Retainer

A pinledge Fig. 10-34 is occasionally used as a single restoration, generally to reestablish anterior guidance, in which case only the lingual surface is prepared. More commonly, however, it is used as a retainer for a fixed partial denture Fig. 10-35 or to splint periodontally compromised teeth Fig. 10-36 . In these cases, one or more of the proximal surfaces are included in the preparation design to accommodate the required connector s . Retention and resistance are provided primarily by pins...

Clinical Attachment Level

Documenting Clinical Attachment Loss

Documenting the level of attachment helps the clinician determine the amount of periodontal destruction that has occurred and is essential when rendering a diagnosis of periodontitis loss of connective tissue attachment 1617 This measurement also provides the clinician with more detailed and accurate information regarding the prognosis of an individual tooth. The clinical attachment level CAL or AL is determined by measuring the distance between the apical extent of the probing depth and a...

Sanitary Or Hygienic Pontic

Hygienic Pontic Ridge Relation

As its name implies, the primary design feature of the sanitary pontic allows easy cleaning, because its tissue surface remains clear of the residual ridge Fig. 20-10 . This hygienic design permits easier Fig. 20-10. A hygienic or sanitary pontic replacing a mandibular molar where there has been considerable bone loss. Fig. 20-10. A hygienic or sanitary pontic replacing a mandibular molar where there has been considerable bone loss. Ill MIIIHIMIMMIMMMMMMM H M plaque control by allowing gauze...

Soldering Flux And Antiflux

This substance is applied to a metal surface to remove oxides or prevent their formation. When the oxides are removed, the solder is free to wet and spread over the clean metal surface. Borax glass Na2B4O7 is frequently used with gold alloys because of its affinity for copper oxides. An often-cited soldering flux formula'-' is borax glass 55 parts , boric acid 35 parts , and silica 10 parts . These ingredients are fused together and then ground into a powder. Fluxes are...

The Metal Ceramic Crown Preparation

Full Metal Crownpreparation

In many dental practices the metal-ceramic crown is one of the most widely used fixed restorations. This has resulted in part from technologic improvements in the fabrication of restoration by dental laboratories and in part from the growing amount of cosmetic demands that challenge dentists today. The restoration consists of a complete-coverage cast metal crown or substructure that is veneered with a layer of fused porcelain to mimic the appearance of a natural tooth. The extent of the veneer...

Saddle Or Ridge Lap Pontic

Ridge Lap Pontic

The saddle pontic has a concave fitting surface that overlaps the residual ridge buccolingually, simulating the contours and emergence profile of the missing tooth on both sides of the residual ridge. How ever, saddle or ridge lap designs should be avoided because the concave gingival surface of the pontic is not accessible to cleaning with dental floss, which will lead to plaque accumulation Fig. 20-12 . This design deficiency has been shown to result in tissue inflammation' Fig. 20-13 ....

Victor O Lucia. The Fundamentals Of Oral Physiology And Their Practical Application In The Securing And Reproducing Of

Anterior Guidance Incisal Table

Fabrication of a custom anterior guidance table. A, Armamentarium. B, Incisal pin is raised 1 or 2 mm. C, Lubricate the tip of the pin. D, Wet the table with monomer. E, Dispense and mix resin of choice. F, Apply resin to acrylic table. G, Insert pin into doughy resin. H, Track the protrusive path. 1, Right working movement and all intermediate lat-erotrusive paths. J, Left working movement and all intermediate lat-ertrusive paths. K, Allow resin to set excess resin still needs to be...