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Biomedical subjects

I F Ross

Publications and source records attributed to I F Ross.

At least 19 recordsLinked to original sources
PubMed1986

Effect of periodontal therapy on patients maintained for 15 years or longer. A retrospective study.

A retrospective study of tooth loss in 211 patients who were treated for periodontal disease in private practice and maintained for 15 to 34 years on 3- to 6-month recall schedules is reported. The average age of the patients was 42 years, and the average length of time in maintenance was 22 years. On the basis of response to therapy, the patients were classified as Well-Maintained (62%), Downhill (28%) and Extreme Downhill (10%). Seven hundred and seventy-one (771) teeth were lost (13.4%) due to all causes. Molar teeth are the most prone to loss and the mandibular cuspid is the most resistant. The importance of maintenance therapy is emphasized.

Adolescent↗
PubMed1981

Root fusion in molars: incidence and sex linkage.

The study was done to determine the incidence and distribution of root fusion in 1340 maxillary and mandibular molars in 170 patients. A second objective was to determine whether root fusion of molars is sex-linked. A substantial percentage, 29% of all molars, had fused roots. Root fusion was found more frequently in maxillary than mandibular molars, 35% to 24%, and it occurred in many patients, rather than being limited to a few. Root fusion was most common in third molars, followed by second molars, in both jaws. It occurred in almost equal numbers in corresponding molars of opposite sides, approaching bilateral symmetry. The proportion of molars with root fusion was approximately 5% greater in females than in males, and about 13% more females had molar root fusion than males.

Adult↗
PubMed1980

Furcation involvement in maxillary and mandibular molars.

This is a sequel to a previous study that showed that many molars with furcation involvement (F.I.) can survive in a state of health and can function efficiently and without pain for many years. This finding is at variance with the views of others who believe that the prognosis for teeth with F.I. is unfavorable. The conclusions of the present study are: (1) F.I. of molars was a common finding; it occurred much more frequently than anticipated. (2) F.I. occurred three times more frequently among maxillary molars than among mandibular molars. (3) Many molars with F.I. functioned well from 5 to 24 years. (4) Based on these findings, it is suggested that two aspects of molars with F.I. be reevaluated, i.e. their prognosis and treatment. Further it is suggested that therapy for these teeth be designed to improve their functional environment and that in many instances removal of root or bone or extraction of the tooth is not necessary. (5) F.I. was detected more frequently in maxillary molars by radiographic examination than by clinical examination. On the other hand F.I. was detected more frequently in mandibular molars by clinical examination than by radiographic examination.

Adult↗
PubMed1980

Coronal reshaping.

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Dental Occlusion, Balanced↗
PubMed1978

A long term study of root retention in the treatment of maxillary molars with furcation involvement.

A study was done to evaluate long-term results of treating 387 maxillary molars with furcation involvement in 100 patients with chronic destructive periodontal disease. Results showed a favorable long term functional survival rate of 341 teeth (88%) 5 to 24 years after treatment, despite the fact that many teeth had at least one root with 50% or less of bone support before treatment. Of the 46 teeth (12%) that were ultimately extracted, 25 were present for a significant length of time (6 to 18 years) before extraction. The radiographs of 292 teeth (75%) showed no significant change in bone support 5 to 24 years after treatement, while those of 8 teeth (2%) suggested improvement. There was perceptible increase in bone loss in 41 teeth (11%). Forty-six (12 %) were extracted. All periodontally involved teeth in each patient of the study were treated. Specific treatment for maxillary molars with furaction involvement included soft tissue therapy; coronal reshaping, if indicated; and instruction in home care. Considerable emphasis was placed on improving occlusal function. In no case was root amputation, hemisection, osseous surgery, or reshaping of the cervical area of the tooth done. A total of 366 (94%) of the teeth did not have endodontic therapy before, during, or after the study. Therefore endodontic therapy was not a significant factor in retention of the 341 teeth.

Adult↗
PubMed1977

Acquired mesio-occlusion in adults: treatment without appliances.

1. The two types of mesio-occlusion are developmental (true Class III) and acquired. 2. In acquired mesio-occlusion the mandible can be retruded comfortably so that maxillary and mandibular incisors meet edge to edge. This cannot be done by the patient with developmental mesio-occlusion. 3. The extent and severity of periodontal disease cannot be predicted from the severity of the malocclusion. 4. In most patients the treatment of choice for acquired mesio-occlusion is coronal reshaping and periodontal therapy if periodontal disease is present. 5. Orthodontic therapy may be used as an adjunctive therapy in selected patients. However, disadvantages are often greater than advantages when orthodontic therapy is used to treat acquired mesio-occlusion in adults.

Adult↗