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Biomedical subjects

A C Goerig

Publications and source records attributed to A C Goerig.

At least 19 recordsLinked to original sources
PubMed1991

The ability of the radiograph to determine the location of the apical foramen.

An in-vitro radiographic study of human teeth was performed in order to evaluate the ability of radiographs to determine the location of the apical foramen. The tip of an endodontic file was positioned at the apical foramen of each canal in 117 extracted human teeth (213 canals) and in 56 teeth (92 canals) still within the alveolus of dried jaw specimens. Parallel radiographs were taken in a bucco-lingual plane of all teeth. The tip of the instrument appeared to be at the root surface (apical foramen) in 82 per cent of canals. There was no significant difference in results between the teeth radiographed in the alveolus of dried jaw specimens and extracted teeth when the radiographs were evaluated under a stereomicroscope.

Dental Pulp Cavity↗
PubMed1989

Augmenting retention of a removable partial denture repair.

A simple technique improves the retention of a tooth to be added to an existing removable partial denture. The procedure includes placing a small contoured wire into the space provided for the acrylic resin repairing material.

Acrylic Resins↗
PubMed1989

An in vitro comparison of different bleaching agents in the discolored tooth.

Extracted teeth with intact crowns were stained to compare and evaluate the effectiveness of four bleaching agent combinations. Forty-two permanent and 12 deciduous teeth were used. The bleaching agents were placed into coronal pulp chambers and then evaluated and rated at 1-, 3-, 7-, and 14-day and 6-month intervals. New sodium perborate combined with fresh Superoxol was the most effective bleaching agent with 93% success (the final shade was as light as the prestained shade). New sodium perborate and 1-yr-old Superoxol was 73% successful. New sodium perborate with distilled water and old sodium perborate with distilled water were both 53% successful. Deciduous teeth demonstrated a response to bleaching agents similar to that of permanent teeth. Color regression after 6 months was found in 4% of the cases. When it occurred, the degree of color regression was minimal.

Borates↗
PubMed1989

Effects of sterilization procedures on the cutting efficiency of stainless steel and carbon steel Gates Glidden drills.

One-hundred fifty carbon steel Gates Glidden drills were compared with 150 stainless steel Gates Glidden drills before and after sterilization in an autoclave, salt beads, dry heat, or 2% alkaline glutaraldehyde. Cutting efficiency and separation rates of the drills were evaluated. Stainless steel #1 and 2 Gates Glidden drills resisted separation and maintained their cutting efficiency statistically better than the carbon steel #1 and 2 Gates Glidden drills after one sterilization cycle in an autoclave, salt bead sterilizer, or dry heat oven. Glutaraldehyde did not effect either type of drill.

Corrosion↗
PubMed1989

Endodontic access: an update, Part II.

Part two of the series on root canal access discusses treatment of the premolars and the mandibular and maxillary molars, and offers additional treatment recommendations.

Bicuspid↗
PubMed1984

Endodontic treatment of a cementoblastoma.

The benign cementoblastoma (true cementoma, osteoblastoma, giant osteoid osteoma) appears to be a true neoplasm of functional cementoblasts which proliferate at the apex of teeth to form an expansile tumor. It remains intimately attached to the tooth roots and occasionally involves the root canals themselves. Although the pulpal tissue remains vital, treatment has historically consisted of extraction of the involved tooth along with extirpation of the tumor. This mode of therapy for the benign cementoblastoma should not be confused with the entity called periapical cemental dysplasia (that is cementoma, periapical osteofibroma or osteofibrosis, cementifying fibroma, localized fibro-osteoma, and periapical fibrous dysplasia). In this latter lesion the treatment consists of simply recognizing the condition and establishing a schedule for periodic evaluation of the patient. In the case presented here enucleation of the cementoblastoma and endodontic therapy were selected as treatment modalities, despite the presence of buccal and lingual expansion of the cortical plates. There has been no recurrence of this growth during the 4-year follow-up period.

Adult↗