Periodontal procedures rely on a specific set of instruments designed for measuring, scaling, reshaping soft tissue, contouring bone, and closing surgical sites. These range from simple handheld probes to ultrasonic scalers and dental lasers. Here’s a breakdown of the primary instruments organized by how they’re used in practice.
Periodontal Probes
The periodontal probe is the most fundamental diagnostic instrument in periodontics. It’s a thin, rod-shaped tool with millimeter markings used to measure the depth of the sulcus or pocket around each tooth. Healthy pockets typically measure 1 to 3 millimeters, and anything deeper signals potential disease. Three major probe designs dominate clinical use: the Williams probe, the Michigan O probe, and the WHO-CPITN probe. Each has slightly different marking increments and tip diameters, but they all serve the same core purpose of measuring attachment levels and pocket depth.
The Williams probe features markings at 1, 2, 3, 5, 7, 8, 9, and 10 millimeters, with a blank space between 3 and 5 that makes readings easy to spot at a glance. The Michigan O probe uses similar increments but has a thinner tip. The WHO-CPITN probe adds a small ball tip (0.5 mm) designed to follow the contour of the root surface without perforating thin tissue, and it’s the standard instrument for community screening indices.
Sickle Scalers
Sickle scalers are heavy, sturdy instruments built for removing calculus (tarite deposits) above the gumline. They have a flat surface, a pointed tip, and two cutting edges that converge to a sharp point. That strong triangular cross-section makes them resistant to breakage during forceful strokes against hard deposits. Because of their rigid design and pointed tip, sickle scalers are limited to supragingival use. Pushing them below the gumline risks damaging the delicate tissue lining the pocket.
Curettes: Universal and Gracey
Curettes are the workhorse instruments for subgingival scaling and root planing. They’re finer than sickle scalers and have a rounded toe instead of a pointed tip, which allows them to slide safely beneath the gumline to remove calculus, bacterial deposits, and the diseased soft tissue lining the pocket wall.
Universal curettes have a blade curved in one direction and two usable cutting edges, making a single instrument adaptable to all tooth surfaces and all areas of the mouth. Area-specific Gracey curettes take a different approach. Their blades are curved in two planes, from head to toe and along the side of the cutting edge, so only one cutting edge is active. This design means you need multiple instruments, but each one is precisely angled for a specific tooth surface.
The standard Gracey set includes nine numbered pairs:
- Gracey 1/2 and 3/4: anterior teeth, all surfaces
- Gracey 5/6: anterior teeth and premolars, all surfaces
- Gracey 7/8 and 9/10: premolars and molars, cheek-side and tongue-side surfaces
- Gracey 11/12 and 15/16: premolars and molars, mesial (front-facing) surfaces
- Gracey 13/14 and 17/18: premolars and molars, distal (back-facing) surfaces
The higher-numbered pairs (15/16 and 17/18) have extended shanks that improve reach into deeper pockets and around the back molars.
Ultrasonic Scalers
Power-driven ultrasonic scalers use high-frequency mechanical vibrations, combined with a water spray, to shatter and flush away calculus and bacterial plaque. They work faster than hand instruments on heavy deposits and are standard in both initial therapy and maintenance visits. Two main types exist, distinguished by how they generate vibration.
Magnetostrictive scalers vibrate at 18,000 to 45,000 cycles per second (Hz) and produce an elliptical tip movement. Because the tip is active on all its surfaces, it creates a stronger tapping sensation for the patient. Piezoelectric scalers operate at 25,000 to 50,000 Hz and move in a linear, back-and-forth pattern, with the tip active primarily on its lateral sides. Both are effective at disrupting biofilm and removing deposits, though the choice between them often comes down to clinician preference and the specific clinical situation.
Periodontal Knives
Soft tissue surgery in periodontics requires specialized cutting instruments. The Kirkland knife has a curved, kidney-shaped blade designed for making the initial incision during a gingivectomy (surgical removal of excess gum tissue). Its shape allows clean, well-defined incisions along the gumline. The Orban knife, by contrast, is an interproximal knife with a spear-shaped blade used to cut the tissue between teeth after the primary incision is made. Together, these two instruments handle the bulk of soft tissue excision and reshaping in traditional gingivectomy and gingivoplasty procedures.
Periosteal Elevators
When a periodontal procedure requires access to the underlying bone, the clinician must lift a flap of gum tissue away from the tooth and bone surface. Periosteal elevators are the instruments that make this possible. They slide between the bone and the periosteum (the thin connective tissue membrane covering bone) to reflect the tissue cleanly without tearing it. Common designs include the Seldin elevator, which often features a large flap retractor on one end and a smaller periosteal blade on the other, and the Prichard elevator, which is widely used in periodontal flap surgeries for both reflecting and retracting tissue to maintain visibility during the procedure.
Bone Chisels and Files
Periodontal surgery sometimes involves reshaping the bone around teeth to eliminate defects or create a more physiologic contour. Two specialized chisels handle most of this work. Ochsenbein chisels are designed specifically for sculpting and contouring the alveolar bone. They come in straight and curved varieties, with the curved version (Ochsenbein #2) angled upward to reach difficult areas. Rhodes back-action chisels work on a pulling stroke rather than a pushing one, making them especially useful for removing bone around the back sides of molars where space is tight. They’re also used to harvest small bone chips for grafting procedures, particularly in preparation for dental implants.
Bone files complement chisels by smoothing rough edges left after bone removal. They work with a push-pull filing motion and are typically the last instruments used on bone before the flap is repositioned.
Dental Lasers
Lasers have become increasingly common in periodontal therapy. The most prominent is the Nd:YAG laser, operating at a wavelength of 1064 nanometers. The FDA-cleared PerioLase system, for example, is indicated for sulcular debridement (removing diseased soft tissue from within the periodontal pocket), and it’s the device behind the LANAP protocol. LANAP stands for laser-assisted new attachment procedure, which aims to promote regeneration of the periodontal ligament, new cementum, and new bone on previously diseased root surfaces without traditional flap surgery.
Erbium lasers (Er:YAG), operating at a different wavelength, can cut both soft tissue and hard tissue like bone and calculus, making them versatile for various surgical applications. The choice of laser wavelength determines which tissues absorb the energy and how the laser interacts with the treatment site.
Implant-Specific Instruments
Maintaining dental implants requires a completely different set of scaling instruments than those used on natural teeth. Standard stainless steel scalers and curettes can scratch the polished surface of implant abutments and crowns, and those scratches create microscopic grooves that harbor bacteria. To prevent this, implant scalers and curettes are made from softer materials like plastic, resin, or carbon fiber. Ultrasonic scalers used around implants are fitted with nylon or plastic sheaths over the metal tip. Preserving the smooth, polished surface of the implant components is essential for long-term implant health.
Suture Materials and Needles
After surgical procedures, the tissue flap needs to be secured in place to heal properly. Periodontal surgery generally calls for 3/8 circle, reverse-cutting needles paired with fine-diameter suture thread, typically in sizes 4-0, 5-0, or 6-0. The reverse-cutting needle design reduces the risk of the suture tearing through delicate gum tissue.
For mucogingival procedures like free gingival grafts, connective tissue grafts, and frenectomies, 5-0 monofilament suture on a reverse-cutting 3/8 circle needle is the most common choice. When microsurgical technique is used, particularly for root coverage procedures, sutures finer than 5-0 (such as 6-0) are associated with better outcomes. Monofilament sutures are generally preferred in these delicate procedures because their single-strand structure resists bacterial wicking, where bacteria travel along the threads into the wound.