Pulpal response to threaded pin and retentive slot techniques: a pilot investigation.
This investigation compared pulpal response to threaded pin techniques with response to retentive slot techniques. The teeth were restored with composite resin. Twenty-four teeth were assigned to three treatment groups in one Macaca mulatta monkey. Ten teeth (group 1) received 32 TMS 0.021-inch self-threading pins. Ten teeth (group II) received circumferential slot retention 1 mm deep, 0.5 mm inside the dentinoenamel junction. Four teeth (group III) served as controls. Groups I and II were restored with composite resin. Fourteen days later, the teeth were removed, demineralized, serially sectioned, and stained with hematoxylin and eosin. Chi-square analysis indicated more pulp inflammation when self-threading pins were used (p less than 0.5). Pins placed within 0.5 mm of the pulp elicited severe inflammatory responses, and those placed further than 1 mm had minimal effect. Little correlation existed between remaining dentin thickness and adverse pulp response when slot retention was used.
Felton
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DA
Department of Prosthodontics, University of North Carolina, School of Dentistry, Chapel Hill.
Webb
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EL
Kanoy
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BE
Cox
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CF
D000818:Animals; D003188:Composite Resins; D003737:Dental Cavity Preparation / Q000009:adverse effects / Q000379:methods*; D003772:Dental Pins; D003782:Dental Pulp / Q000033:anatomy & histology* / Q000473:pathology; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000295:instrumentation; D003804:Dentin / Q000033:anatomy & histology; D008253:Macaca mulatta; D010865:Pilot Projects; D011671:Pulpitis / Q000473:pathology
D003188:Composite Resins